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Route overview: Houston to Denver (DEN) flight deals

Houston → Denver

Dec 21, 2026 · choose your return date

IAH → DEN1 adulteconomyOne way and round trips

30 flight options · 3 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Dec 21, 2026 · One wayFrontier AirlinesNonstop$91.00 Dec 21, 2026 · One wayUnited AirlinesNonstop$231.00 Dec 21, 2026 – Dec 22, 2026 · 1 nightFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 22, 2026 · 1 nightUnited AirlinesNonstop$427.00 Dec 21, 2026 – Dec 23, 2026 · 2 nightsFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 23, 2026 · 2 nightsAmerican Airlines / Frontier AirlinesUp to 1 stop each way$301.00 Dec 21, 2026 – Dec 24, 2026 · 3 nightsFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 24, 2026 · 3 nightsAmerican Airlines / Frontier AirlinesUp to 1 stop each way$301.00 Dec 21, 2026 – Dec 25, 2026 · 4 nightsFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 25, 2026 · 4 nightsUnited AirlinesNonstop$427.00 Dec 21, 2026 – Dec 26, 2026 · 5 nightsFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 26, 2026 · 5 nightsUnited AirlinesNonstop$427.00 Dec 21, 2026 – Dec 27, 2026 · 6 nightsFrontier AirlinesNonstop$168.00 Dec 21, 2026 – Dec 27, 2026 · 6 nightsUnited AirlinesNonstop$427.00 Dec 21, 2026 – Dec 28, 2026 · 7 nightsFrontier AirlinesNonstop$165.00 Dec 21, 2026 – Dec 28, 2026 · 7 nightsUnited AirlinesNonstop$419.38 Dec 21, 2026 – Dec 29, 2026 · 8 nightsFrontier AirlinesNonstop$165.00 Dec 21, 2026 – Dec 29, 2026 · 8 nightsUnited AirlinesNonstop$419.38 Dec 21, 2026 – Dec 30, 2026 · 9 nightsFrontier AirlinesNonstop$165.00 Dec 21, 2026 – Dec 30, 2026 · 9 nightsUnited AirlinesNonstop$419.38 Dec 21, 2026 – Dec 31, 2026 · 10 nightsFrontier AirlinesNonstop$165.00 Dec 21, 2026 – Dec 31, 2026 · 10 nightsUnited AirlinesNonstop$419.38 Dec 21, 2026 – Jan 1, 2027 · 11 nightsFrontier AirlinesNonstop$160.80 Dec 21, 2026 – Jan 1, 2027 · 11 nightsUnited AirlinesNonstop$408.70 Dec 21, 2026 – Jan 2, 2027 · 12 nightsFrontier AirlinesNonstop$160.80 Dec 21, 2026 – Jan 2, 2027 · 12 nightsUnited AirlinesNonstop$408.70 Dec 21, 2026 – Jan 3, 2027 · 13 nightsFrontier AirlinesNonstop$160.80 Dec 21, 2026 – Jan 3, 2027 · 13 nightsUnited AirlinesNonstop$408.70 Dec 21, 2026 – Jan 4, 2027 · 14 nightsFrontier AirlinesNonstop$141.00 Dec 21, 2026 – Jan 4, 2027 · 14 nightsUnited AirlinesNonstop$358.38

Flights for your trip

  1. Mon, Dec 21 · One way

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Mon, Dec 21 · One way

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Mon, Dec 21 – Tue, Dec 22

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Mon, Dec 21 – Tue, Dec 22

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    9:52 amDEN
    2h 33m
    Nonstop
    1:25 pmIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Mon, Dec 21 – Wed, Dec 23

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Mon, Dec 21 – Wed, Dec 23

    American Airlines
    6:00 amIAH
    4h 49m
    DFW · 1h 1m
    9:49 amDEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Mon, Dec 21 – Thu, Dec 24

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Mon, Dec 21 – Thu, Dec 24

    American Airlines
    6:00 amIAH
    4h 49m
    DFW · 1h 1m
    9:49 amDEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Mon, Dec 21 – Fri, Dec 25

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Mon, Dec 21 – Fri, Dec 25

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    7:44 amDEN
    2h 25m
    Nonstop
    11:09 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Mon, Dec 21 – Sun, Dec 27

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Mon, Dec 21 – Sun, Dec 27

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    7:44 amDEN
    2h 25m
    Nonstop
    11:09 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Mon, Dec 21 – Mon, Dec 28

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    9:18 pmDEN
    2h 24m
    Nonstop
    12:42 am+1IAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Mon, Dec 21 – Mon, Dec 28

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    5:00 amDEN
    2h 27m
    Nonstop
    8:27 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Mon, Dec 21 – Tue, Dec 29

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Mon, Dec 21 – Tue, Dec 29

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    6:44 pmDEN
    2h 26m
    Nonstop
    10:10 pmIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Mon, Dec 21 – Thu, Dec 31

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Mon, Dec 21 – Thu, Dec 31

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    5:00 amDEN
    2h 27m
    Nonstop
    8:27 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Mon, Dec 21 – Fri, Jan 1

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Mon, Dec 21 – Fri, Jan 1

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    1:25 pmDEN
    2h 29m
    Nonstop
    4:54 pmIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Mon, Dec 21 – Sat, Jan 2

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    5:36 amDEN
    2h 38m
    Nonstop
    9:14 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Mon, Dec 21 – Sat, Jan 2

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    1:25 pmDEN
    2h 29m
    Nonstop
    4:54 pmIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Mon, Dec 21 – Mon, Jan 4

    Frontier Airlines
    10:59 pmIAH
    2h 45m
    Nonstop
    12:44 am+1DEN
    Frontier Airlines
    9:18 pmDEN
    2h 24m
    Nonstop
    12:42 am+1IAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Mon, Dec 21 – Mon, Jan 4

    United Airlines
    9:45 amIAH
    2h 52m
    Nonstop
    11:37 amDEN
    United Airlines
    5:00 amDEN
    2h 27m
    Nonstop
    8:27 amIAH

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

IAH ⇄ DEN

Economy

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

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Explore this route

All dates for this routeDec 20, 2026 · Return optionsDec 22, 2026 · Return optionsHotels in Denver with Axel
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.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 · one wayFrontier AirlinesF92995Axel-exclusive $91.002026-10-29T01:10:09Z
2026-12-21 · one wayUnited AirlinesUA1309Axel-exclusive $231.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-22Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-22United AirlinesUA1309 / UA1241Axel-exclusive $427.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-23Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-23American Airlines / Frontier AirlinesAA2551 + AA2357 / F93206Axel-exclusive $301.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-24Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-24American Airlines / Frontier AirlinesAA2551 + AA2357 / F93206Axel-exclusive $301.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-25Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-25United AirlinesUA1309 / UA1720Axel-exclusive $427.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-26Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-26United AirlinesUA1309 / UA1720Axel-exclusive $427.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-27Frontier AirlinesF92995 / F93206Axel-exclusive $168.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-27United AirlinesUA1309 / UA1720Axel-exclusive $427.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-28Frontier AirlinesF92995 / F92996Axel-exclusive $165.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-28United AirlinesUA1309 / UA320Axel-exclusive $419.382026-10-29T01:10:09Z
2026-12-21 → 2026-12-29Frontier AirlinesF92995 / F93206Axel-exclusive $165.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-29United AirlinesUA1309 / UA2059Axel-exclusive $419.382026-10-29T01:10:09Z
2026-12-21 → 2026-12-30Frontier AirlinesF92995 / F93206Axel-exclusive $165.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-30United AirlinesUA1309 / UA320Axel-exclusive $419.382026-10-29T01:10:09Z
2026-12-21 → 2026-12-31Frontier AirlinesF92995 / F93206Axel-exclusive $165.002026-10-29T01:10:09Z
2026-12-21 → 2026-12-31United AirlinesUA1309 / UA320Axel-exclusive $419.382026-10-29T01:10:09Z
2026-12-21 → 2027-01-01Frontier AirlinesF92995 / F93206Axel-exclusive $160.802026-10-29T01:10:09Z
2026-12-21 → 2027-01-01United AirlinesUA1309 / UA1829Axel-exclusive $408.702026-10-29T01:10:09Z
2026-12-21 → 2027-01-02Frontier AirlinesF92995 / F93206Axel-exclusive $160.802026-10-29T01:10:09Z
2026-12-21 → 2027-01-02United AirlinesUA1309 / UA1829Axel-exclusive $408.702026-10-29T01:10:09Z
2026-12-21 → 2027-01-03Frontier AirlinesF92995 / F93206Axel-exclusive $160.802026-10-29T01:10:09Z
2026-12-21 → 2027-01-03United AirlinesUA1309 / UA320Axel-exclusive $408.702026-10-29T01:10:09Z
2026-12-21 → 2027-01-04Frontier AirlinesF92995 / F92996Axel-exclusive $141.002026-10-29T01:10:09Z
2026-12-21 → 2027-01-04United AirlinesUA1309 / UA320Axel-exclusive $358.382026-10-29T01:10:09Z

Route overview: Houston to Denver (DEN) flight deals

2026-12-21 · one way · Axel-exclusive $91.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.

2026-12-21 · one way · Axel-exclusive $231.00

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.

2026-12-21 → 2026-12-22 · Axel-exclusive $168.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-22 05:36:00 → IAH 2026-12-22 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-22 · Axel-exclusive $427.00

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA1241: DEN 2026-12-22 09:52:00 → IAH 2026-12-22 13:25:00; nonstop; 153 minutes. Local airport times.

2026-12-21 → 2026-12-23 · Axel-exclusive $168.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-23 05:36:00 → IAH 2026-12-23 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-23 · Axel-exclusive $301.00

  • American Airlines AA2551 / AA2357: IAH 2026-12-21 06:00:00 → DEN 2026-12-21 09:49:00; 1 stop(s) via DFW; 289 minutes. Local airport times.
    • AA2551: IAH 2026-12-21 06:00:00 → DFW 2026-12-21 07:33:00; layover at DFW: 61 minutes.
    • AA2357: DFW 2026-12-21 08:34:00 → DEN 2026-12-21 09:49:00.
  • Frontier Airlines F93206: DEN 2026-12-23 05:36:00 → IAH 2026-12-23 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-24 · Axel-exclusive $168.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-24 05:36:00 → IAH 2026-12-24 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-24 · Axel-exclusive $301.00

  • American Airlines AA2551 / AA2357: IAH 2026-12-21 06:00:00 → DEN 2026-12-21 09:49:00; 1 stop(s) via DFW; 289 minutes. Local airport times.
    • AA2551: IAH 2026-12-21 06:00:00 → DFW 2026-12-21 07:33:00; layover at DFW: 61 minutes.
    • AA2357: DFW 2026-12-21 08:34:00 → DEN 2026-12-21 09:49:00.
  • Frontier Airlines F93206: DEN 2026-12-24 05:36:00 → IAH 2026-12-24 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-25 · Axel-exclusive $168.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-25 05:36:00 → IAH 2026-12-25 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-25 · Axel-exclusive $427.00

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA1720: DEN 2026-12-25 07:44:00 → IAH 2026-12-25 11:09:00; nonstop; 145 minutes. Local airport times.

2026-12-21 → 2026-12-27 · Axel-exclusive $168.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-27 05:36:00 → IAH 2026-12-27 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-27 · Axel-exclusive $427.00

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA1720: DEN 2026-12-27 07:44:00 → IAH 2026-12-27 11:09:00; nonstop; 145 minutes. Local airport times.

2026-12-21 → 2026-12-28 · Axel-exclusive $165.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F92996: DEN 2026-12-28 21:18:00 → IAH 2026-12-29 00:42:00; nonstop; 144 minutes. Local airport times.

2026-12-21 → 2026-12-28 · Axel-exclusive $419.38

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA320: DEN 2026-12-28 05:00:00 → IAH 2026-12-28 08:27:00; nonstop; 147 minutes. Local airport times.

2026-12-21 → 2026-12-29 · Axel-exclusive $165.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-29 05:36:00 → IAH 2026-12-29 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-29 · Axel-exclusive $419.38

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA2059: DEN 2026-12-29 18:44:00 → IAH 2026-12-29 22:10:00; nonstop; 146 minutes. Local airport times.

2026-12-21 → 2026-12-31 · Axel-exclusive $165.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2026-12-31 05:36:00 → IAH 2026-12-31 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2026-12-31 · Axel-exclusive $419.38

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA320: DEN 2026-12-31 05:00:00 → IAH 2026-12-31 08:27:00; nonstop; 147 minutes. Local airport times.

2026-12-21 → 2027-01-01 · Axel-exclusive $160.80

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2027-01-01 05:36:00 → IAH 2027-01-01 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2027-01-01 · Axel-exclusive $408.70

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA1829: DEN 2027-01-01 13:25:00 → IAH 2027-01-01 16:54:00; nonstop; 149 minutes. Local airport times.

2026-12-21 → 2027-01-02 · Axel-exclusive $160.80

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2027-01-02 05:36:00 → IAH 2027-01-02 09:14:00; nonstop; 158 minutes. Local airport times.

2026-12-21 → 2027-01-02 · Axel-exclusive $408.70

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA1829: DEN 2027-01-02 13:25:00 → IAH 2027-01-02 16:54:00; nonstop; 149 minutes. Local airport times.

2026-12-21 → 2027-01-04 · Axel-exclusive $141.00

  • Frontier Airlines F92995: IAH 2026-12-21 22:59:00 → DEN 2026-12-22 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F92996: DEN 2027-01-04 21:18:00 → IAH 2027-01-05 00:42:00; nonstop; 144 minutes. Local airport times.

2026-12-21 → 2027-01-04 · Axel-exclusive $358.38

  • United Airlines UA1309: IAH 2026-12-21 09:45:00 → DEN 2026-12-21 11:37:00; nonstop; 172 minutes. Local airport times.
  • United Airlines UA320: DEN 2027-01-04 05:00:00 → IAH 2027-01-04 08:27:00; nonstop; 147 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Houston (IAH) to Denver (DEN) · Dec 21, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • 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 Houston 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. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. 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.