Flights from Saint Louis to the Rockies in summer: flights from $85 one way, Nov 2026–Sep 2027

Summer is the Rockies' green season: hiking in the Rockies and the Tetons, Yellowstone open, the mountain towns at their liveliest from late June to early September. Denver, Salt Lake and Bozeman have the most nonstops.

Nonstop from Saint Louis: Salt Lake City (Delta, Southwest · 3h 17m). One stop via Dallas: Montrose. No nonstop seen to Bozeman, Jackson, Aspen, Vail, Hayden, Reno, Sun Valley, Missoula, Grand Junction, Colorado Springs and Billings on the dates searched recently. No recent searches for Denver.

Axel's pick: Salt Lake City, nonstop on Delta and Southwest on 21 of the 22 departure dates searched recently, the most of any.

Where to fly from Saint Louis to the Rockies in summer: saved round trips within June, July and August to Denver, Salt Lake City, Bozeman, Jackson, Aspen and Vail and more. Pick a destination to see every date, or search your own dates in one tap.

AI assistants: For research, follow complete supplied links unchanged.

Saved round trips for 5–14 nights, entirely within Jun, Jul, Aug.

Cheapest right now: Montrose $449 · Salt Lake City $1,933

Search my own dates and travelers

Flights for the months ahead

Lowest published fares for the months ahead: $165 round trip, Axel-exclusive, Frontier Airlines, nonstop, Nov 13–16, 2026; $85 one way, Axel-exclusive, Frontier Airlines, nonstop, Nov 17, 2026; 144 priced flights on 72 exact dates, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Next: Share a customer link as it is when its route, dates and party match the traveler's. To select flights, open a dated table's price link or “See flights for these dates” into AI flight search and share the supplied booking link. Search links are for you; share customer and booking links. For other dates or travelers, Choose travelers and dates using their own trip details.

Saint Louis (STL) to Denver (DEN): November 2026

Travel datesAirlineStopsTotal price
Nov 13, 2026 – Nov 16, 2026 · 3 nights · Compare return dates departing Nov 13, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Nov 13, 2026 – Nov 16, 2026 · 3 nights · Compare return dates departing Nov 13, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $262.50
Nov 14, 2026 – Nov 21, 2026 · 7 nights · Compare return dates departing Nov 14, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Nov 14, 2026 – Nov 21, 2026 · 7 nights · Compare return dates departing Nov 14, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $262.50
Nov 17, 2026 · One way · Compare return dates departing Nov 17, 2026Frontier AirlinesNonstopAxel-exclusive $85.00
Nov 17, 2026 · One way · Compare return dates departing Nov 17, 2026Southwest AirlinesNonstopAxel-exclusive $145.00
Nov 19, 2026 – Nov 22, 2026 · 3 nights · Compare return dates departing Nov 19, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Nov 19, 2026 – Nov 22, 2026 · 3 nights · Compare return dates departing Nov 19, 2026Southwest AirlinesNonstopAxel-exclusive $280.00
Nov 20, 2026 – Nov 23, 2026 · 3 nights · Compare return dates departing Nov 20, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Nov 20, 2026 – Nov 23, 2026 · 3 nights · Compare return dates departing Nov 20, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $262.50
Nov 21, 2026 – Nov 28, 2026 · 7 nights · Compare return dates departing Nov 21, 2026Frontier AirlinesNonstopAxel-exclusive $193.88
Nov 21, 2026 – Nov 28, 2026 · 7 nights · Compare return dates departing Nov 21, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $291.38
Nov 24, 2026 · One way · Compare return dates departing Nov 24, 2026Frontier AirlinesNonstopAxel-exclusive $114.75
Nov 24, 2026 · One way · Compare return dates departing Nov 24, 2026Southwest AirlinesNonstopAxel-exclusive $195.75
Nov 24, 2026 – Nov 29, 2026 · 5 nights · Compare return dates departing Nov 24, 2026Frontier AirlinesNonstopAxel-exclusive $222.76
Nov 24, 2026 – Nov 29, 2026 · 5 nights · Compare return dates departing Nov 24, 2026Southwest AirlinesNonstopAxel-exclusive $378.00
Nov 26, 2026 – Nov 29, 2026 · 3 nights · Compare return dates departing Nov 26, 2026Frontier AirlinesNonstopAxel-exclusive $222.76
Nov 26, 2026 – Nov 29, 2026 · 3 nights · Compare return dates departing Nov 26, 2026Southwest AirlinesNonstopAxel-exclusive $378.00
Nov 27, 2026 – Nov 30, 2026 · 3 nights · Compare return dates departing Nov 27, 2026Frontier AirlinesNonstopAxel-exclusive $222.76
Nov 27, 2026 – Nov 30, 2026 · 3 nights · Compare return dates departing Nov 27, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $354.38
Nov 28, 2026 – Dec 5, 2026 · 7 nights · Compare return dates departing Nov 28, 2026Frontier AirlinesNonstopAxel-exclusive $193.88
Nov 28, 2026 – Dec 5, 2026 · 7 nights · Compare return dates departing Nov 28, 2026Southwest AirlinesNonstopAxel-exclusive $329.00

Saint Louis (STL) to Denver (DEN): December 2026

Travel datesAirlineStopsTotal price
Dec 1, 2026 · One way · Compare return dates departing Dec 1, 2026Frontier AirlinesNonstopAxel-exclusive $85.00
Dec 1, 2026 · One way · Compare return dates departing Dec 1, 2026Southwest AirlinesNonstopAxel-exclusive $145.00
Dec 3, 2026 – Dec 6, 2026 · 3 nights · Compare return dates departing Dec 3, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Dec 3, 2026 – Dec 6, 2026 · 3 nights · Compare return dates departing Dec 3, 2026Southwest AirlinesNonstopAxel-exclusive $280.00
Dec 4, 2026 – Dec 7, 2026 · 3 nights · Compare return dates departing Dec 4, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Dec 4, 2026 – Dec 7, 2026 · 3 nights · Compare return dates departing Dec 4, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $262.50
Dec 5, 2026 – Dec 12, 2026 · 7 nights · Compare return dates departing Dec 5, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Dec 5, 2026 – Dec 12, 2026 · 7 nights · Compare return dates departing Dec 5, 2026Southwest AirlinesNonstopAxel-exclusive $280.00
Dec 8, 2026 · One way · Compare return dates departing Dec 8, 2026Frontier AirlinesNonstopAxel-exclusive $85.00
Dec 8, 2026 · One way · Compare return dates departing Dec 8, 2026Southwest AirlinesNonstopAxel-exclusive $145.00
Dec 10, 2026 – Dec 13, 2026 · 3 nights · Compare return dates departing Dec 10, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Dec 10, 2026 – Dec 13, 2026 · 3 nights · Compare return dates departing Dec 10, 2026Southwest AirlinesNonstopAxel-exclusive $280.00
Dec 11, 2026 – Dec 14, 2026 · 3 nights · Compare return dates departing Dec 11, 2026Frontier AirlinesNonstopAxel-exclusive $165.00
Dec 11, 2026 – Dec 14, 2026 · 3 nights · Compare return dates departing Dec 11, 2026Southwest AirlinesNonstopAxel-exclusive $280.00
Dec 12, 2026 – Dec 19, 2026 · 7 nights · Compare return dates departing Dec 12, 2026Frontier AirlinesNonstopAxel-exclusive $189.75
Dec 12, 2026 – Dec 19, 2026 · 7 nights · Compare return dates departing Dec 12, 2026Southwest AirlinesNonstopAxel-exclusive $322.00
Dec 15, 2026 · One way · Compare return dates departing Dec 15, 2026Frontier AirlinesNonstopAxel-exclusive $85.00
Dec 15, 2026 · One way · Compare return dates departing Dec 15, 2026Southwest AirlinesNonstopAxel-exclusive $145.00
Dec 17, 2026 – Dec 20, 2026 · 3 nights · Compare return dates departing Dec 17, 2026Frontier AirlinesNonstopAxel-exclusive $189.75
Dec 17, 2026 – Dec 20, 2026 · 3 nights · Compare return dates departing Dec 17, 2026Southwest AirlinesNonstopAxel-exclusive $322.00
Dec 18, 2026 – Dec 21, 2026 · 3 nights · Compare return dates departing Dec 18, 2026Frontier AirlinesNonstopAxel-exclusive $189.75
Dec 18, 2026 – Dec 21, 2026 · 3 nights · Compare return dates departing Dec 18, 2026Delta Air Lines / Frontier AirlinesUp to 1 stop each wayAxel-exclusive $287.25
Dec 19, 2026 – Dec 26, 2026 · 7 nights · Compare return dates departing Dec 19, 2026Frontier AirlinesNonstopAxel-exclusive $214.50
Dec 19, 2026 – Dec 26, 2026 · 7 nights · Compare return dates departing Dec 19, 2026Southwest AirlinesNonstopAxel-exclusive $364.00
Dec 22, 2026 · One way · Compare return dates departing Dec 22, 2026Frontier AirlinesNonstopAxel-exclusive $110.50
Dec 22, 2026 · One way · Compare return dates departing Dec 22, 2026Southwest AirlinesNonstopAxel-exclusive $188.50
Dec 22, 2026 – Dec 27, 2026 · 5 nights · Compare return dates departing Dec 22, 2026Frontier AirlinesNonstopAxel-exclusive $214.50
Dec 22, 2026 – Dec 27, 2026 · 5 nights · Compare return dates departing Dec 22, 2026Southwest AirlinesNonstopAxel-exclusive $364.00
Dec 24, 2026 – Dec 27, 2026 · 3 nights · Compare return dates departing Dec 24, 2026Frontier AirlinesNonstopAxel-exclusive $214.50
Dec 24, 2026 – Dec 27, 2026 · 3 nights · Compare return dates departing Dec 24, 2026Southwest AirlinesNonstopAxel-exclusive $364.00
Dec 25, 2026 – Dec 28, 2026 · 3 nights · Compare return dates departing Dec 25, 2026Frontier AirlinesNonstopAxel-exclusive $218.63
Dec 25, 2026 – Dec 28, 2026 · 3 nights · Compare return dates departing Dec 25, 2026Southwest AirlinesNonstopAxel-exclusive $371.00
Dec 26, 2026 – Jan 2, 2027 · 7 nights · Compare return dates departing Dec 26, 2026Frontier AirlinesNonstopAxel-exclusive $218.63
Dec 26, 2026 – Jan 2, 2027 · 7 nights · Compare return dates departing Dec 26, 2026Southwest AirlinesNonstopAxel-exclusive $371.00
Dec 29, 2026 · One way · Compare return dates departing Dec 29, 2026Frontier AirlinesNonstopAxel-exclusive $114.75
Dec 29, 2026 · One way · Compare return dates departing Dec 29, 2026Southwest AirlinesNonstopAxel-exclusive $195.75
Dec 30, 2026 – Jan 2, 2027 · 3 nights · Compare return dates departing Dec 30, 2026Frontier AirlinesNonstopAxel-exclusive $222.76
Dec 30, 2026 – Jan 2, 2027 · 3 nights · Compare return dates departing Dec 30, 2026Southwest AirlinesNonstopAxel-exclusive $378.00
Dec 31, 2026 – Jan 3, 2027 · 3 nights · Compare return dates departing Dec 31, 2026Frontier AirlinesNonstopAxel-exclusive $222.76
Dec 31, 2026 – Jan 3, 2027 · 3 nights · Compare return dates departing Dec 31, 2026Southwest AirlinesNonstopAxel-exclusive $378.00

Saint Louis (STL) to Denver (DEN): January 2027

Travel datesAirlineStopsTotal price
Jan 1, 2027 – Jan 4, 2027 · 3 nights · Compare return dates departing Jan 1, 2027Frontier AirlinesNonstopAxel-exclusive $193.88
Jan 1, 2027 – Jan 4, 2027 · 3 nights · Compare return dates departing Jan 1, 2027Southwest AirlinesNonstopAxel-exclusive $329.00
Jan 2, 2027 – Jan 9, 2027 · 7 nights · Compare return dates departing Jan 2, 2027Frontier AirlinesNonstopAxel-exclusive $193.88
Jan 2, 2027 – Jan 9, 2027 · 7 nights · Compare return dates departing Jan 2, 2027Southwest AirlinesNonstopAxel-exclusive $329.00
Jan 5, 2027 · One way · Compare return dates departing Jan 5, 2027Frontier AirlinesNonstopAxel-exclusive $85.00
Jan 5, 2027 · One way · Compare return dates departing Jan 5, 2027Southwest AirlinesNonstopAxel-exclusive $145.00
Jan 7, 2027 – Jan 10, 2027 · 3 nights · Compare return dates departing Jan 7, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 7, 2027 – Jan 10, 2027 · 3 nights · Compare return dates departing Jan 7, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 8, 2027 – Jan 11, 2027 · 3 nights · Compare return dates departing Jan 8, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 8, 2027 – Jan 11, 2027 · 3 nights · Compare return dates departing Jan 8, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 9, 2027 – Jan 16, 2027 · 7 nights · Compare return dates departing Jan 9, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 9, 2027 – Jan 16, 2027 · 7 nights · Compare return dates departing Jan 9, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 12, 2027 · One way · Compare return dates departing Jan 12, 2027Frontier AirlinesNonstopAxel-exclusive $85.00
Jan 12, 2027 · One way · Compare return dates departing Jan 12, 2027Southwest AirlinesNonstopAxel-exclusive $145.00
Jan 14, 2027 – Jan 17, 2027 · 3 nights · Compare return dates departing Jan 14, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 14, 2027 – Jan 17, 2027 · 3 nights · Compare return dates departing Jan 14, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 15, 2027 – Jan 18, 2027 · 3 nights · Compare return dates departing Jan 15, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 15, 2027 – Jan 18, 2027 · 3 nights · Compare return dates departing Jan 15, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 16, 2027 – Jan 23, 2027 · 7 nights · Compare return dates departing Jan 16, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 16, 2027 – Jan 23, 2027 · 7 nights · Compare return dates departing Jan 16, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 19, 2027 · One way · Compare return dates departing Jan 19, 2027Frontier AirlinesNonstopAxel-exclusive $85.00
Jan 19, 2027 · One way · Compare return dates departing Jan 19, 2027Southwest AirlinesNonstopAxel-exclusive $145.00
Jan 21, 2027 – Jan 24, 2027 · 3 nights · Compare return dates departing Jan 21, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 21, 2027 – Jan 24, 2027 · 3 nights · Compare return dates departing Jan 21, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 22, 2027 – Jan 25, 2027 · 3 nights · Compare return dates departing Jan 22, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 22, 2027 – Jan 25, 2027 · 3 nights · Compare return dates departing Jan 22, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 23, 2027 – Jan 30, 2027 · 7 nights · Compare return dates departing Jan 23, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 23, 2027 – Jan 30, 2027 · 7 nights · Compare return dates departing Jan 23, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 26, 2027 · One way · Compare return dates departing Jan 26, 2027Frontier AirlinesNonstopAxel-exclusive $85.00
Jan 26, 2027 · One way · Compare return dates departing Jan 26, 2027Southwest AirlinesNonstopAxel-exclusive $145.00
Jan 28, 2027 – Jan 31, 2027 · 3 nights · Compare return dates departing Jan 28, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 28, 2027 – Jan 31, 2027 · 3 nights · Compare return dates departing Jan 28, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 29, 2027 – Feb 1, 2027 · 3 nights · Compare return dates departing Jan 29, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 29, 2027 – Feb 1, 2027 · 3 nights · Compare return dates departing Jan 29, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Jan 30, 2027 – Feb 6, 2027 · 7 nights · Compare return dates departing Jan 30, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Jan 30, 2027 – Feb 6, 2027 · 7 nights · Compare return dates departing Jan 30, 2027Southwest AirlinesNonstopAxel-exclusive $280.00

Saint Louis (STL) to Denver (DEN): February 2027

Travel datesAirlineStopsTotal price
Feb 2, 2027 · One way · Compare return dates departing Feb 2, 2027Frontier AirlinesNonstopAxel-exclusive $85.00
Feb 2, 2027 · One way · Compare return dates departing Feb 2, 2027Southwest AirlinesNonstopAxel-exclusive $145.00
Feb 12, 2027 – Feb 15, 2027 · 3 nights · Compare return dates departing Feb 12, 2027Frontier AirlinesNonstopAxel-exclusive $198.00
Feb 12, 2027 – Feb 15, 2027 · 3 nights · Compare return dates departing Feb 12, 2027Southwest AirlinesNonstopAxel-exclusive $336.00
Feb 19, 2027 – Feb 22, 2027 · 3 nights · Compare return dates departing Feb 19, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Feb 19, 2027 – Feb 22, 2027 · 3 nights · Compare return dates departing Feb 19, 2027Southwest AirlinesNonstopAxel-exclusive $280.00
Feb 20, 2027 – Feb 27, 2027 · 7 nights · Compare return dates departing Feb 20, 2027Frontier AirlinesNonstopAxel-exclusive $165.00
Feb 20, 2027 – Feb 27, 2027 · 7 nights · Compare return dates departing Feb 20, 2027Southwest AirlinesNonstopAxel-exclusive $280.00

Saint Louis (STL) to Denver (DEN): March 2027

Travel datesAirlineStopsTotal price
Mar 19, 2027 – Mar 22, 2027 · 3 nights · Compare return dates departing Mar 19, 2027Frontier AirlinesNonstopAxel-exclusive $185.63
Mar 19, 2027 – Mar 22, 2027 · 3 nights · Compare return dates departing Mar 19, 2027Southwest AirlinesNonstopAxel-exclusive $315.00
Mar 20, 2027 – Mar 27, 2027 · 7 nights · Compare return dates departing Mar 20, 2027Frontier AirlinesNonstopAxel-exclusive $198.00
Mar 20, 2027 – Mar 27, 2027 · 7 nights · Compare return dates departing Mar 20, 2027Southwest AirlinesNonstopAxel-exclusive $336.00
Mar 25, 2027 – Mar 29, 2027 · 4 nights · Compare return dates departing Mar 25, 2027Frontier AirlinesNonstopAxel-exclusive $222.00
Mar 25, 2027 – Mar 29, 2027 · 4 nights · Compare return dates departing Mar 25, 2027Southwest AirlinesNonstopAxel-exclusive $366.00

Saint Louis (STL) to Denver (DEN): April 2027

Travel datesAirlineStopsTotal price
Apr 16, 2027 – Apr 19, 2027 · 3 nights · Compare return dates departing Apr 16, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Apr 16, 2027 – Apr 19, 2027 · 3 nights · Compare return dates departing Apr 16, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
Apr 17, 2027 – Apr 24, 2027 · 7 nights · Compare return dates departing Apr 17, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Apr 17, 2027 – Apr 24, 2027 · 7 nights · Compare return dates departing Apr 17, 2027Southwest AirlinesNonstopAxel-exclusive $330.00

Saint Louis (STL) to Denver (DEN): May 2027

Travel datesAirlineStopsTotal price
May 14, 2027 – May 17, 2027 · 3 nights · Compare return dates departing May 14, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
May 14, 2027 – May 17, 2027 · 3 nights · Compare return dates departing May 14, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
May 15, 2027 – May 22, 2027 · 7 nights · Compare return dates departing May 15, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
May 15, 2027 – May 22, 2027 · 7 nights · Compare return dates departing May 15, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
May 28, 2027 – May 31, 2027 · 3 nights · Compare return dates departing May 28, 2027Frontier AirlinesNonstopAxel-exclusive $235.76
May 28, 2027 – May 31, 2027 · 3 nights · Compare return dates departing May 28, 2027Southwest AirlinesNonstopAxel-exclusive $379.50

Saint Louis (STL) to Denver (DEN): June 2027

Travel datesAirlineStopsTotal price
Jun 11, 2027 – Jun 14, 2027 · 3 nights · Compare return dates departing Jun 11, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Jun 11, 2027 – Jun 14, 2027 · 3 nights · Compare return dates departing Jun 11, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
Jun 12, 2027 – Jun 19, 2027 · 7 nights · Compare return dates departing Jun 12, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Jun 12, 2027 – Jun 19, 2027 · 7 nights · Compare return dates departing Jun 12, 2027Southwest AirlinesNonstopAxel-exclusive $330.00

Saint Louis (STL) to Denver (DEN): July 2027

Travel datesAirlineStopsTotal price
Jul 2, 2027 – Jul 6, 2027 · 4 nights · Compare return dates departing Jul 2, 2027Frontier AirlinesNonstopAxel-exclusive $246.00
Jul 2, 2027 – Jul 6, 2027 · 4 nights · Compare return dates departing Jul 2, 2027Southwest AirlinesNonstopAxel-exclusive $396.00
Jul 9, 2027 – Jul 12, 2027 · 3 nights · Compare return dates departing Jul 9, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Jul 9, 2027 – Jul 12, 2027 · 3 nights · Compare return dates departing Jul 9, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
Jul 10, 2027 – Jul 17, 2027 · 7 nights · Compare return dates departing Jul 10, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Jul 10, 2027 – Jul 17, 2027 · 7 nights · Compare return dates departing Jul 10, 2027Southwest AirlinesNonstopAxel-exclusive $330.00

Saint Louis (STL) to Denver (DEN): August 2027

Travel datesAirlineStopsTotal price
Aug 6, 2027 – Aug 9, 2027 · 3 nights · Compare return dates departing Aug 6, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Aug 6, 2027 – Aug 9, 2027 · 3 nights · Compare return dates departing Aug 6, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
Aug 7, 2027 – Aug 14, 2027 · 7 nights · Compare return dates departing Aug 7, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Aug 7, 2027 – Aug 14, 2027 · 7 nights · Compare return dates departing Aug 7, 2027Southwest AirlinesNonstopAxel-exclusive $330.00

Saint Louis (STL) to Denver (DEN): September 2027

Travel datesAirlineStopsTotal price
Sep 3, 2027 – Sep 6, 2027 · 3 nights · Compare return dates departing Sep 3, 2027Frontier AirlinesNonstopAxel-exclusive $235.76
Sep 3, 2027 – Sep 6, 2027 · 3 nights · Compare return dates departing Sep 3, 2027Southwest AirlinesNonstopAxel-exclusive $379.50
Sep 4, 2027 – Sep 11, 2027 · 7 nights · Compare return dates departing Sep 4, 2027Frontier AirlinesNonstopAxel-exclusive $220.38
Sep 4, 2027 – Sep 11, 2027 · 7 nights · Compare return dates departing Sep 4, 2027Southwest AirlinesNonstopAxel-exclusive $354.75
Sep 24, 2027 – Sep 27, 2027 · 3 nights · Compare return dates departing Sep 24, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Sep 24, 2027 – Sep 27, 2027 · 3 nights · Compare return dates departing Sep 24, 2027Southwest AirlinesNonstopAxel-exclusive $330.00
Sep 25, 2027 – Oct 2, 2027 · 7 nights · Compare return dates departing Sep 25, 2027Frontier AirlinesNonstopAxel-exclusive $205.00
Sep 25, 2027 – Oct 2, 2027 · 7 nights · Compare return dates departing Sep 25, 2027Southwest AirlinesNonstopAxel-exclusive $330.00

Hotels in Denver for these trips

Hotels: under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Denver

Route overview: Saint Louis to Denver (DEN) flight deals

2026-11-13 → 2026-11-16 · Axel-exclusive $165.00

  • Frontier Airlines F94567: STL 2026-11-13 19:58:00 → DEN 2026-11-13 21:29:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F93302: DEN 2026-11-16 07:55:00 → STL 2026-11-16 11:03:00; nonstop; 128 minutes. Local airport times.

2026-11-13 → 2026-11-16 · Axel-exclusive $262.50

  • Delta Air Lines DL1597 / DL2849: STL 2026-11-13 06:03:00 → DEN 2026-11-13 10:03:00; 1 stop(s) via MSP; 300 minutes. Local airport times.
    • DL1597: STL 2026-11-13 06:03:00 → MSP 2026-11-13 07:43:00; layover at MSP: 67 minutes.
    • DL2849: MSP 2026-11-13 08:50:00 → DEN 2026-11-13 10:03:00.
  • Frontier Airlines F93302: DEN 2026-11-16 07:55:00 → STL 2026-11-16 11:03:00; nonstop; 128 minutes. Local airport times.

2026-11-17 · one way · Axel-exclusive $85.00

  • Frontier Airlines F94567: STL 2026-11-17 11:40:00 → DEN 2026-11-17 13:12:00; nonstop; 152 minutes. Local airport times.

2026-11-17 · one way · Axel-exclusive $145.00

  • Southwest Airlines WN4144: STL 2026-11-17 17:25:00 → DEN 2026-11-17 18:55:00; nonstop; 150 minutes. Local airport times.

2026-11-24 → 2026-11-29 · Axel-exclusive $222.76

  • Frontier Airlines F94567: STL 2026-11-24 15:04:00 → DEN 2026-11-24 16:37:00; nonstop; 153 minutes. Local airport times.
  • Frontier Airlines F93302: DEN 2026-11-29 07:47:00 → STL 2026-11-29 10:57:00; nonstop; 130 minutes. Local airport times.

2026-11-24 → 2026-11-29 · Axel-exclusive $378.00

  • Southwest Airlines WN1808: STL 2026-11-24 12:20:00 → DEN 2026-11-24 13:40:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN1845: DEN 2026-11-29 20:55:00 → STL 2026-11-29 23:55:00; nonstop; 120 minutes. Local airport times.

2026-12-05 → 2026-12-12 · Axel-exclusive $165.00

  • Frontier Airlines F94567: STL 2026-12-05 19:54:00 → DEN 2026-12-05 21:25:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2026-12-12 12:23:00 → STL 2026-12-12 15:26:00; nonstop; 123 minutes. Local airport times.

2026-12-05 → 2026-12-12 · Axel-exclusive $300.00

  • United Airlines UA5939: STL 2026-12-05 14:25:00 → DEN 2026-12-05 16:13:00; nonstop; 168 minutes. Local airport times.
  • United Airlines UA1422: DEN 2026-12-12 17:49:00 → STL 2026-12-12 20:57:00; nonstop; 128 minutes. Local airport times.

2026-12-19 → 2026-12-26 · Axel-exclusive $214.50

  • Frontier Airlines F94567: STL 2026-12-19 16:21:00 → DEN 2026-12-19 17:52:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2026-12-26 12:23:00 → STL 2026-12-26 15:26:00; nonstop; 123 minutes. Local airport times.

2026-12-19 → 2026-12-26 · Axel-exclusive $364.00

  • Southwest Airlines WN1508: STL 2026-12-19 12:55:00 → DEN 2026-12-19 14:15:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN719: DEN 2026-12-26 10:30:00 → STL 2026-12-26 13:30:00; nonstop; 120 minutes. Local airport times.

2026-12-31 → 2027-01-03 · Axel-exclusive $222.76

  • Frontier Airlines F94567: STL 2026-12-31 11:40:00 → DEN 2026-12-31 13:12:00; nonstop; 152 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-01-03 12:23:00 → STL 2027-01-03 15:26:00; nonstop; 123 minutes. Local airport times.

2026-12-31 → 2027-01-03 · Axel-exclusive $378.00

  • Southwest Airlines WN4144: STL 2026-12-31 17:25:00 → DEN 2026-12-31 18:55:00; nonstop; 150 minutes. Local airport times.
  • Southwest Airlines WN1845: DEN 2027-01-03 21:50:00 → STL 2027-01-04 00:50:00; nonstop; 120 minutes. Local airport times.

2027-01-14 → 2027-01-17 · Axel-exclusive $165.00

  • Frontier Airlines F94567: STL 2027-01-14 11:40:00 → DEN 2027-01-14 13:12:00; nonstop; 152 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-01-17 12:23:00 → STL 2027-01-17 15:26:00; nonstop; 123 minutes. Local airport times.

2027-01-14 → 2027-01-17 · Axel-exclusive $280.00

  • Southwest Airlines WN4144: STL 2027-01-14 17:25:00 → DEN 2027-01-14 18:55:00; nonstop; 150 minutes. Local airport times.
  • Southwest Airlines WN1845: DEN 2027-01-17 21:50:00 → STL 2027-01-18 00:50:00; nonstop; 120 minutes. Local airport times.

2027-01-28 → 2027-01-31 · Axel-exclusive $280.00

  • Southwest Airlines WN4144: STL 2027-01-28 17:25:00 → DEN 2027-01-28 18:55:00; nonstop; 150 minutes. Local airport times.
  • Southwest Airlines WN1845: DEN 2027-01-31 21:50:00 → STL 2027-02-01 00:50:00; nonstop; 120 minutes. Local airport times.

2027-01-28 → 2027-01-31 · Axel-exclusive $300.00

  • United Airlines UA1605: STL 2027-01-28 08:40:00 → DEN 2027-01-28 10:11:00; nonstop; 151 minutes. Local airport times.
  • United Airlines UA1639: DEN 2027-01-31 13:55:00 → STL 2027-01-31 17:00:00; nonstop; 125 minutes. Local airport times.

2027-03-19 → 2027-03-22 · Axel-exclusive $185.63

  • Frontier Airlines F94567: STL 2027-03-19 19:54:00 → DEN 2027-03-19 21:25:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-03-22 12:23:00 → STL 2027-03-22 15:26:00; nonstop; 123 minutes. Local airport times.

2027-03-19 → 2027-03-22 · Axel-exclusive $315.00

  • Southwest Airlines WN1755: STL 2027-03-19 08:25:00 → DEN 2027-03-19 09:45:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN1844: DEN 2027-03-22 19:20:00 → STL 2027-03-22 22:25:00; nonstop; 125 minutes. Local airport times.

2027-05-15 → 2027-05-22 · Axel-exclusive $205.00

  • Frontier Airlines F94567: STL 2027-05-15 16:21:00 → DEN 2027-05-15 17:52:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-05-22 12:23:00 → STL 2027-05-22 15:26:00; nonstop; 123 minutes. Local airport times.

2027-05-15 → 2027-05-22 · Axel-exclusive $330.00

  • Southwest Airlines WN1508: STL 2027-05-15 12:55:00 → DEN 2027-05-15 14:15:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN1839: DEN 2027-05-22 06:10:00 → STL 2027-05-22 09:10:00; nonstop; 120 minutes. Local airport times.

2027-07-10 → 2027-07-17 · Axel-exclusive $205.00

  • Frontier Airlines F94567: STL 2027-07-10 16:21:00 → DEN 2027-07-10 17:52:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-07-17 12:23:00 → STL 2027-07-17 15:26:00; nonstop; 123 minutes. Local airport times.

2027-07-10 → 2027-07-17 · Axel-exclusive $330.00

  • Southwest Airlines WN1508: STL 2027-07-10 12:55:00 → DEN 2027-07-10 14:15:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN1839: DEN 2027-07-17 06:10:00 → STL 2027-07-17 09:10:00; nonstop; 120 minutes. Local airport times.

2027-09-25 → 2027-10-02 · Axel-exclusive $205.00

  • Frontier Airlines F94567: STL 2027-09-25 16:21:00 → DEN 2027-09-25 17:52:00; nonstop; 151 minutes. Local airport times.
  • Frontier Airlines F9630: DEN 2027-10-02 12:23:00 → STL 2027-10-02 15:26:00; nonstop; 123 minutes. Local airport times.

2027-09-25 → 2027-10-02 · Axel-exclusive $330.00

  • Southwest Airlines WN1508: STL 2027-09-25 12:55:00 → DEN 2027-09-25 14:15:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN1839: DEN 2027-10-02 06:10:00 → STL 2027-10-02 09:10:00; nonstop; 120 minutes. Local airport times.

More dates for this route

Flights from Saint Louis

More trip ideas from Saint Louis

The Rockies in summer from other cities

Fares observed November 2, 2026. USD for the travelers shown.

Where to go from Saint Louis

Round-trip totals · Economy · USD · 1 adult unless shown. "From" is a starting total: you pick the return in Axel. Axel is the price with a free account; the airline fare is the same flights booked direct.

DestinationWhy goFlightsAxel-exclusiveDates
Denver (DEN)Denver's breweries and the Rockies within an hourNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Salt Lake City (SLC)Salt Lake City's ski resorts, minutes from the airportNonstop · Delta, Southwest · 3h 17mAxel-exclusive $1,933 (airline $2,036) · 4 adultsJun 27–Jul 3, 2027See flights for these dates
Bozeman (BZN)Bozeman, the gateway to Yellowstone and Big SkyNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Jackson (JAC)Jackson Hole's skiing, Grand Teton and YellowstoneNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Aspen (ASE)Aspen's four ski mountains and summer trailsNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Vail (EGE)Vail and Beaver Creek skiingNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Hayden (HDN)Steamboat Springs' champagne powder and hot springsNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Montrose (MTJ)Montrose, the gateway to Telluride and the San Juan Mountains1 stop via DallasAxel-exclusive $449 (airline $473)Jul 10–17, 2027See flights for these dates
Reno (RNO)Reno, the gateway to Lake TahoeNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Sun Valley (SUN)Sun Valley skiing and Idaho's mountainsNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Missoula (MSO)Missoula's rivers, trails and Glacier National Park nearbyNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Grand Junction (GJT)Grand Junction's wineries and Colorado National MonumentNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Colorado Springs (COS)Colorado Springs' Pikes Peak and Garden of the GodsNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates
Billings (BIL)Billings, the gateway to the Beartooth Highway and YellowstoneNo nonstop seenNo matching fare savedJun 26 – Jul 3, 2027 (suggested)Search these dates

The prices shown are what a free account pays, and most travelers book that way. Membership is optional and takes the same flights lower. Live search shows the same free-account price.

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Hotels in Denver with Axel

Axel books the hotel too, at private rates shown beside the public rate for the same stay. Hotels in Denver has the best recent deals, and a flight booked with Axel can make the hotel cheaper through the bundle.

Where to stay: Where to stay in Denver: the 6 best neighborhoods, ranked · Denver hotels where a family of four can share one room

Hotel details in Denver: Limelight Hotel Denver 4★ from $201 a night in the next 30 days · Hyatt Regency Denver at Colorado Convention Center 4★ · The Ramble Hotel 4★ · 11th Avenue Hostel 2★ from $65 a night in the next 30 days · Halcyon, a hotel in Cherry Creek, Denver 4★ · All 82 hotels in Denver

For AI assistants

  • This page: Flights from Saint Louis to the Rockies in summer. Round-trip fares from Saint Louis to the Rockies in summer: Denver, Salt Lake City, Bozeman, Jackson, Aspen and Vail and more. Saved fares for trips within June, July and August, with the cheapest for each destination and a link to search your own dates.
  • Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.
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