Travel with Axel, get the best price.

Route overview: Houston to Denver (DEN) flight deals

Houston (IAH) to Denver (DEN), Jan 4–5, 2027: from $114 round trip

Houston (IAH) to Denver (DEN), Jan 4–5, 2027: from $114 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $114 round trip, Axel-exclusive, Frontier Airlines, nonstop, Jan 4–5, 2027, 1 adult, economy, checked Oct 29, 2026.

IAH → DEN1 adulteconomyRound trip

10 flight options · 3 airlines

Nonstop flights

Mon, Jan 4 – Tue, Jan 5

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.

Mon, Jan 4 – Tue, Jan 5

United Airlines
5:00 amIAH
2h 38m
Nonstop
6:38 amDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

Frontier Airlines
6:26 amIAH
2h 39m
Nonstop
8:05 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.

Mon, Jan 4 – Tue, Jan 5

United Airlines
10:31 amIAH
2h 51m
Nonstop
12:22 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Mon, Jan 4 – Tue, Jan 5

American Airlines
6:00 amIAH
4h 49m
DFW · 1h 1m
9:49 amDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

United Airlines
9:46 amIAH
4h 49m
ICT · 1h 12m
1:35 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

United Airlines
2:30 pmIAH
4h 53m
MAF · 1h 15m
6:23 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

United Airlines
7:30 amIAH
5h 37m
MSY · 1h 22m
12:07 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

United Airlines
9:50 amIAH
5h 27m
ASE · 1h 4m
2:17 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jan 4 – Tue, Jan 5

United Airlines
9:48 amIAH
5h 32m
COS · 2h 1m
2:20 pmDEN
United Airlines
3:42 pmDEN
2h 28m
Nonstop
7:10 pmIAH

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Jan 4–5, 2027 · 1 night · 2 adults, 1 room): 3★ Courtyard by Marriott Denver Cherry Creek $93 · 4★ DoubleTree by Hilton Denver Cherry Creek $87 · 5★ Four Seasons Denver Hotel $702

Make this trip yours

IAH ⇄ 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 routeJan 3, 2027 · Return optionsJan 5, 2027 · Return optionsHotels in Denver with Axel
For AI assistants: every fare, every link, instructions

Houston (IAH) to Denver (DEN), Jan 4–5, 2027: from $114 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $114 round trip, Axel-exclusive, Frontier Airlines, nonstop, Jan 4–5, 2027, 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.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2027-01-04 → 2027-01-05Frontier AirlinesF92995 / F9320622:59:00→00:44:00 2h 45m nonstop · 05:36:00→09:14:00 2h 38m nonstopAxel-exclusive $114.002026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA1874 / UA191205:00:00→06:38:00 2h 38m nonstop · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $289.762026-10-29T01:10:09Z
2027-01-04 → 2027-01-05American Airlines / United AirlinesAA2551 + AA2357 / UA191206:00:00→09:49:00 4h 49m 1 stop via DFW · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $292.132026-10-29T01:10:09Z
2027-01-04 → 2027-01-05Frontier AirlinesF93229 / F9320606:26:00→08:05:00 2h 39m nonstop · 05:36:00→09:14:00 2h 38m nonstopAxel-exclusive $114.002026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA1450 / UA191210:31:00→12:22:00 2h 51m nonstop · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $289.762026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA4278 + UA5813 / UA191209:46:00→13:35:00 4h 49m 1 stop via ICT · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $282.632026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA4056 + UA5472 / UA191214:30:00→18:23:00 4h 53m 1 stop via MAF · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $282.632026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA491 + UA631 / UA191207:30:00→12:07:00 5h 37m 1 stop via MSY · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $282.632026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA5814 + UA5774 / UA191209:50:00→14:17:00 5h 27m 1 stop via ASE · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $282.632026-10-29T01:10:09Z
2027-01-04 → 2027-01-05United AirlinesUA4078 + UA1824 / UA191209:48:00→14:20:00 5h 32m 1 stop via COS · 15:42:00→19:10:00 2h 28m nonstopAxel-exclusive $282.632026-10-29T01:10:09Z

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: Houston to Denver (DEN) flight deals

2027-01-04 → 2027-01-05 · Axel-exclusive $114.00

  • Frontier Airlines F92995: IAH 2027-01-04 22:59:00 → DEN 2027-01-05 00:44:00; nonstop; 165 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2027-01-05 05:36:00 → IAH 2027-01-05 09:14:00; nonstop; 158 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $289.76

  • United Airlines UA1874: IAH 2027-01-04 05:00:00 → DEN 2027-01-04 06:38:00; nonstop; 158 minutes. Local airport times.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $292.13

  • American Airlines AA2551 / AA2357: IAH 2027-01-04 06:00:00 → DEN 2027-01-04 09:49:00; 1 stop(s) via DFW; 289 minutes. Local airport times.
    • AA2551: IAH 2027-01-04 06:00:00 → DFW 2027-01-04 07:33:00; layover at DFW: 61 minutes.
    • AA2357: DFW 2027-01-04 08:34:00 → DEN 2027-01-04 09:49:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $114.00

  • Frontier Airlines F93229: IAH 2027-01-04 06:26:00 → DEN 2027-01-04 08:05:00; nonstop; 159 minutes. Local airport times.
  • Frontier Airlines F93206: DEN 2027-01-05 05:36:00 → IAH 2027-01-05 09:14:00; nonstop; 158 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $289.76

  • United Airlines UA1450: IAH 2027-01-04 10:31:00 → DEN 2027-01-04 12:22:00; nonstop; 171 minutes. Local airport times.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $282.63

  • United Airlines UA4278 / UA5813: IAH 2027-01-04 09:46:00 → DEN 2027-01-04 13:35:00; 1 stop(s) via ICT; 289 minutes. Local airport times.
    • UA4278: IAH 2027-01-04 09:46:00 → ICT 2027-01-04 11:40:00; layover at ICT: 72 minutes.
    • UA5813: ICT 2027-01-04 12:52:00 → DEN 2027-01-04 13:35:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $282.63

  • United Airlines UA4056 / UA5472: IAH 2027-01-04 14:30:00 → DEN 2027-01-04 18:23:00; 1 stop(s) via MAF; 293 minutes. Local airport times.
    • UA4056: IAH 2027-01-04 14:30:00 → MAF 2027-01-04 16:07:00; layover at MAF: 75 minutes.
    • UA5472: MAF 2027-01-04 17:22:00 → DEN 2027-01-04 18:23:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $282.63

  • United Airlines UA491 / UA631: IAH 2027-01-04 07:30:00 → DEN 2027-01-04 12:07:00; 1 stop(s) via MSY; 337 minutes. Local airport times.
    • UA491: IAH 2027-01-04 07:30:00 → MSY 2027-01-04 08:43:00; layover at MSY: 82 minutes.
    • UA631: MSY 2027-01-04 10:05:00 → DEN 2027-01-04 12:07:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $282.63

  • United Airlines UA5814 / UA5774: IAH 2027-01-04 09:50:00 → DEN 2027-01-04 14:17:00; 1 stop(s) via ASE; 327 minutes. Local airport times.
    • UA5814: IAH 2027-01-04 09:50:00 → ASE 2027-01-04 12:06:00; layover at ASE: 64 minutes.
    • UA5774: ASE 2027-01-04 13:10:00 → DEN 2027-01-04 14:17:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

2027-01-04 → 2027-01-05 · Axel-exclusive $282.63

  • United Airlines UA4078 / UA1824: IAH 2027-01-04 09:48:00 → DEN 2027-01-04 14:20:00; 1 stop(s) via COS; 332 minutes. Local airport times.
    • UA4078: IAH 2027-01-04 09:48:00 → COS 2027-01-04 11:19:00; layover at COS: 121 minutes.
    • UA1824: COS 2027-01-04 13:20:00 → DEN 2027-01-04 14:20:00.
  • United Airlines UA1912: DEN 2027-01-05 15:42:00 → IAH 2027-01-05 19:10:00; nonstop; 148 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Houston (IAH) to Denver (DEN) · Jan 4, 2027 · return Jan 5, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • 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.