Travel with Axel,
get the best price.

Route overview: Sun Valley to Denver (DEN) flight deals

Sun Valley → Denver

Jan 22, 2027 · return Feb 1, 2027

SUN → DEN1 adulteconomyRound trip

4 flight options · 3 airlines

Nonstop flights

Fri, Jan 22 – Mon, Feb 1

United Airlines
2:34 pmSUN
1h 56m
Nonstop
4:30 pmDEN
United Airlines
11:45 amDEN
2h 8m
Nonstop
1:53 pmSUN

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Jan 22 – Mon, Feb 1

Alaska Airlines
11:33 amSUN
6h 6m
SEA · 1h 28m
5:39 pmDEN
United Airlines
11:45 amDEN
2h 8m
Nonstop
1:53 pmSUN

Round-trip total · 1 adult · Taxes included

Fri, Jan 22 – Mon, Feb 1

Delta Air Lines
6:40 pmSUN
3h 57m
SLC · 1h 2m
10:37 pmDEN
Delta Air Lines
10:45 amDEN
4h 3m
SLC · 1h 23m
2:48 pmSUN

Round-trip total · 1 adult · Taxes included

Fri, Jan 22 – Mon, Feb 1

United Airlines
2:45 pmSUN
1h 57m
Nonstop
4:42 pmDEN
Delta Air Lines
10:45 amDEN
4h 3m
SLC · 1h 23m
2:48 pmSUN

Round-trip total · 1 adult · Taxes included

Make this trip yours

SUN ⇄ DEN

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, United Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeJan 21, 2027 → Jan 31, 2027Jan 23, 2027 → Feb 2, 2027
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

Route overview: Sun Valley to Denver (DEN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-01-22 → 2027-02-01United AirlinesUA5268 / UA5429$435.002026-10-29T01:29:25Z
2027-01-22 → 2027-02-01Alaska Airlines / United AirlinesAS2203 + AS421 / UA5429$442.502026-10-29T01:29:25Z
2027-01-22 → 2027-02-01Delta Air LinesDL3867 + DL1667 / DL2362 + DL3689$465.002026-10-29T01:29:25Z
2027-01-22 → 2027-02-01United Airlines / Delta Air LinesUA5268 / DL2362 + DL3689$450.002026-10-29T01:29:25Z

2027-01-22 → 2027-02-01 · $435.00

  • United Airlines UA5268: SUN 2027-01-22 14:34:00 → DEN 2027-01-22 16:30:00; nonstop; 116 minutes. Local airport times.
  • United Airlines UA5429: DEN 2027-02-01 11:45:00 → SUN 2027-02-01 13:53:00; nonstop; 128 minutes. Local airport times.

2027-01-22 → 2027-02-01 · $442.50

  • Alaska Airlines AS2203 / AS421: SUN 2027-01-22 11:33:00 → DEN 2027-01-22 17:39:00; 1 stop(s) via SEA; 366 minutes. Local airport times.
    • AS2203: SUN 2027-01-22 11:33:00 → SEA 2027-01-22 12:31:00; layover at SEA: 88 minutes.
    • AS421: SEA 2027-01-22 13:59:00 → DEN 2027-01-22 17:39:00.
  • United Airlines UA5429: DEN 2027-02-01 11:45:00 → SUN 2027-02-01 13:53:00; nonstop; 128 minutes. Local airport times.

2027-01-22 → 2027-02-01 · $465.00

  • Delta Air Lines DL3867 / DL1667: SUN 2027-01-22 18:40:00 → DEN 2027-01-22 22:37:00; 1 stop(s) via SLC; 237 minutes. Local airport times.
    • DL3867: SUN 2027-01-22 18:40:00 → SLC 2027-01-22 19:57:00; layover at SLC: 62 minutes.
    • DL1667: SLC 2027-01-22 20:59:00 → DEN 2027-01-22 22:37:00.
  • Delta Air Lines DL2362 / DL3689: DEN 2027-02-01 10:45:00 → SUN 2027-02-01 14:48:00; 1 stop(s) via SLC; 243 minutes. Local airport times.
    • DL2362: DEN 2027-02-01 10:45:00 → SLC 2027-02-01 12:18:00; layover at SLC: 83 minutes.
    • DL3689: SLC 2027-02-01 13:41:00 → SUN 2027-02-01 14:48:00.

2027-01-22 → 2027-02-01 · $450.00

  • United Airlines UA5268: SUN 2027-01-22 14:45:00 → DEN 2027-01-22 16:42:00; nonstop; 117 minutes. Local airport times.
  • Delta Air Lines DL2362 / DL3689: DEN 2027-02-01 10:45:00 → SUN 2027-02-01 14:48:00; 1 stop(s) via SLC; 243 minutes. Local airport times.
    • DL2362: DEN 2027-02-01 10:45:00 → SLC 2027-02-01 12:18:00; layover at SLC: 83 minutes.
    • DL3689: SLC 2027-02-01 13:41:00 → SUN 2027-02-01 14:48:00.

Explore this route

For AI assistants

  • This page: Sun Valley (SUN) to Denver (DEN) · Jan 22, 2027 · return Feb 1, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Sun Valley to Denver (DEN) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.