Travel with Axel,
get the best price.

Route overview: Chicago to Denver (DEN) flight deals

Chicago → Denver

Dec 3, 2026 · return Dec 9, 2026

ORD → DEN1 adulteconomyRound trip

11 flight options · 3 airlines

Nonstop flights

Thu, Dec 3 – Wed, Dec 9

Frontier Airlines
6:30 amORD
2h 56m
Nonstop
8:26 amDEN
Frontier Airlines
8:55 pmDEN
2h 26m
Nonstop
12:21 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

American Airlines
9:45 amORD
2h 54m
Nonstop
11:39 amDEN
American Airlines
12:26 pmDEN
2h 38m
Nonstop
4:04 pmORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
12:59 pmORD
2h 50m
Nonstop
2:49 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

American Airlines
9:05 pmORD
2h 52m
Nonstop
10:57 pmDEN
American Airlines
12:26 pmDEN
2h 38m
Nonstop
4:04 pmORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
8:40 amORD
2h 46m
Nonstop
10:26 amDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Dec 3 – Wed, Dec 9

United Airlines
9:10 amORD
6h 7m
ASE · 1h 34m
2:17 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
12:55 pmORD
4h 46m
CID · 1h 11m
4:41 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
12:23 pmORD
6h 17m
ICT · 2h 9m
5:40 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
5:59 amORD
5h 36m
MSN · 1h 51m
10:35 amDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
7:15 amORD
6h
CLE · 1h 4m
12:15 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Wed, Dec 9

United Airlines
1:30 pmORD
5h 45m
TVC · 1h 7m
6:15 pmDEN
United Airlines
8:57 pmDEN
2h 33m
Nonstop
12:30 am+1ORD

Round-trip total · 1 adult · Taxes included

Make this trip yours

ORD ⇄ 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, Frontier 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 routeDec 2, 2026 → Dec 8, 2026Dec 4, 2026 → Dec 10, 2026
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: Chicago to Denver (DEN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-03 → 2026-12-09Frontier AirlinesF91483 / F93174$140.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09American AirlinesAA2762 / AA2762$250.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA2000 / UA361$270.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09American AirlinesAA1387 / AA2762$250.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA318 / UA361$270.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA6033 + UA5774 / UA361$280.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA5841 + UA514 / UA361$280.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA4794 + UA5240 / UA361$280.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA1758 + UA1029 / UA361$280.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA1488 + UA1302 / UA361$280.002026-10-29T01:52:52Z
2026-12-03 → 2026-12-09United AirlinesUA4757 + UA5509 / UA361$280.002026-10-29T01:52:52Z

2026-12-03 → 2026-12-09 · $140.00

  • Frontier Airlines F91483: ORD 2026-12-03 06:30:00 → DEN 2026-12-03 08:26:00; nonstop; 176 minutes. Local airport times.
  • Frontier Airlines F93174: DEN 2026-12-09 20:55:00 → ORD 2026-12-10 00:21:00; nonstop; 146 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $250.00

  • American Airlines AA2762: ORD 2026-12-03 09:45:00 → DEN 2026-12-03 11:39:00; nonstop; 174 minutes. Local airport times.
  • American Airlines AA2762: DEN 2026-12-09 12:26:00 → ORD 2026-12-09 16:04:00; nonstop; 158 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $270.00

  • United Airlines UA2000: ORD 2026-12-03 12:59:00 → DEN 2026-12-03 14:49:00; nonstop; 170 minutes. Local airport times.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $250.00

  • American Airlines AA1387: ORD 2026-12-03 21:05:00 → DEN 2026-12-03 22:57:00; nonstop; 172 minutes. Local airport times.
  • American Airlines AA2762: DEN 2026-12-09 12:26:00 → ORD 2026-12-09 16:04:00; nonstop; 158 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $270.00

  • United Airlines UA318: ORD 2026-12-03 08:40:00 → DEN 2026-12-03 10:26:00; nonstop; 166 minutes. Local airport times.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA6033 / UA5774: ORD 2026-12-03 09:10:00 → DEN 2026-12-03 14:17:00; 1 stop(s) via ASE; 367 minutes. Local airport times.
    • UA6033: ORD 2026-12-03 09:10:00 → ASE 2026-12-03 11:36:00; layover at ASE: 94 minutes.
    • UA5774: ASE 2026-12-03 13:10:00 → DEN 2026-12-03 14:17:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA5841 / UA514: ORD 2026-12-03 12:55:00 → DEN 2026-12-03 16:41:00; 1 stop(s) via CID; 286 minutes. Local airport times.
    • UA5841: ORD 2026-12-03 12:55:00 → CID 2026-12-03 14:16:00; layover at CID: 71 minutes.
    • UA514: CID 2026-12-03 15:27:00 → DEN 2026-12-03 16:41:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA4794 / UA5240: ORD 2026-12-03 12:23:00 → DEN 2026-12-03 17:40:00; 1 stop(s) via ICT; 377 minutes. Local airport times.
    • UA4794: ORD 2026-12-03 12:23:00 → ICT 2026-12-03 14:44:00; layover at ICT: 129 minutes.
    • UA5240: ICT 2026-12-03 16:53:00 → DEN 2026-12-03 17:40:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA1758 / UA1029: ORD 2026-12-03 05:59:00 → DEN 2026-12-03 10:35:00; 1 stop(s) via MSN; 336 minutes. Local airport times.
    • UA1758: ORD 2026-12-03 05:59:00 → MSN 2026-12-03 07:09:00; layover at MSN: 111 minutes.
    • UA1029: MSN 2026-12-03 09:00:00 → DEN 2026-12-03 10:35:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA1488 / UA1302: ORD 2026-12-03 07:15:00 → DEN 2026-12-03 12:15:00; 1 stop(s) via CLE; 360 minutes. Local airport times.
    • UA1488: ORD 2026-12-03 07:15:00 → CLE 2026-12-03 09:41:00; layover at CLE: 64 minutes.
    • UA1302: CLE 2026-12-03 10:45:00 → DEN 2026-12-03 12:15:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

2026-12-03 → 2026-12-09 · $280.00

  • United Airlines UA4757 / UA5509: ORD 2026-12-03 13:30:00 → DEN 2026-12-03 18:15:00; 1 stop(s) via TVC; 345 minutes. Local airport times.
    • UA4757: ORD 2026-12-03 13:30:00 → TVC 2026-12-03 15:53:00; layover at TVC: 67 minutes.
    • UA5509: TVC 2026-12-03 17:00:00 → DEN 2026-12-03 18:15:00.
  • United Airlines UA361: DEN 2026-12-09 20:57:00 → ORD 2026-12-10 00:30:00; nonstop; 153 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Chicago (ORD) to Denver (DEN) · Dec 3, 2026 · return Dec 9, 2026: 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 Chicago 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.