--- title: "Houston (IAH) to Denver (DEN) flights: who flies it" description: "United Airlines and Frontier Airlines fly nonstop from IAH to DEN, about 115 flights a week, covering 863 miles. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/iah-den" url: "https://2lnr.com/routes/iah-den.md" date_modified: "2026-10-18T05:10:47Z" --- # Houston to Denver (IAH-DEN): nonstop flights and who flies them United Airlines and Frontier Airlines fly nonstop between Houston (IAH) and Denver (DEN), roughly 115 times a week. The timetable below shows the nonstop scheduled at 2h 32m to 2h 51m for the 863 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 23, 2026. See IAH to DEN on the interactive map [Get started free](https://2lnr.com/login) 115 Flights a week, 4-week average 2h 32m to 2h 51m Scheduled flight time 863 mi Nonstop distance Free To get started ## Houston to Denver flight schedule Scheduled nonstop departures for IAH to DEN starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Houston (IAH) to Denver (DEN) | Date | Flight | Airline | Departs IAH | Arrives DEN | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 1874 | United Airlines | 05:15 | 06:47 | 2h 32m | [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md) | | Thu, Oct 22 | UA 2415 | United Airlines | 06:20 | 07:52 | 2h 32m | Airbus A321neo family | | Thu, Oct 22 | F9 3229 | Frontier Airlines | 06:24 | 08:05 | 2h 41m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Thu, Oct 22 | UA 1575 | United Airlines | 07:20 | 08:55 | 2h 35m | Airbus A321neo family | | Thu, Oct 22 | UA 1686 | United Airlines | 08:30 | 10:07 | 2h 37m | Airbus A321neo family | | Thu, Oct 22 | UA 1450 | United Airlines | 09:35 | 11:12 | 2h 37m | Airbus A321neo family | | Thu, Oct 22 | F9 3227 | Frontier Airlines | 10:31 | 12:12 | 2h 41m | [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md) | | Thu, Oct 22 | UA 2787 | United Airlines | 10:32 | 12:09 | 2h 37m | Airbus A321neo family | | Thu, Oct 22 | UA 2168 | United Airlines | 12:34 | 14:14 | 2h 40m | [Boeing 757-300](https://2lnr.com/seatmaps/ua/757-300.md) | | Thu, Oct 22 | UA 2767 | United Airlines | 15:00 | 16:45 | 2h 45m | Airbus A321neo family | | Thu, Oct 22 | UA 470 | United Airlines | 16:30 | 18:21 | 2h 51m | Airbus A321neo family | | Thu, Oct 22 | UA 1654 | United Airlines | 18:17 | 20:08 | 2h 51m | Boeing 757-300 | | Thu, Oct 22 | UA 685 | United Airlines | 20:24 | 22:15 | 2h 51m | Airbus A321neo family | | Thu, Oct 22 | F9 3205 | Frontier Airlines | 22:40 | 00:18 | 2h 38m | Airbus A320neo | | Fri, Oct 23 | UA 1874 | United Airlines | 05:15 | 06:47 | 2h 32m | Airbus A321neo family | | Fri, Oct 23 | UA 2415 | United Airlines | 06:20 | 07:52 | 2h 32m | Airbus A321neo family | | Fri, Oct 23 | F9 3229 | Frontier Airlines | 06:24 | 08:05 | 2h 41m | Airbus A321 | | Fri, Oct 23 | UA 1575 | United Airlines | 07:20 | 08:55 | 2h 35m | Airbus A321neo family | | Fri, Oct 23 | UA 1686 | United Airlines | 08:30 | 10:07 | 2h 37m | Airbus A321neo family | | Fri, Oct 23 | UA 1450 | United Airlines | 09:35 | 11:12 | 2h 37m | Airbus A321neo family | | Fri, Oct 23 | F9 3227 | Frontier Airlines | 10:31 | 12:12 | 2h 41m | Airbus A320neo | | Fri, Oct 23 | UA 2787 | United Airlines | 10:32 | 12:09 | 2h 37m | Airbus A321neo family | | Fri, Oct 23 | UA 2168 | United Airlines | 12:34 | 14:14 | 2h 40m | Boeing 757-300 | | Fri, Oct 23 | UA 2767 | United Airlines | 15:00 | 16:45 | 2h 45m | Airbus A321neo family | | Fri, Oct 23 | UA 470 | United Airlines | 16:30 | 18:21 | 2h 51m | Airbus A321neo family | | Fri, Oct 23 | UA 1654 | United Airlines | 18:17 | 20:08 | 2h 51m | Boeing 757-300 | | Fri, Oct 23 | UA 685 | United Airlines | 20:24 | 22:08 | 2h 44m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Fri, Oct 23 | F9 3205 | Frontier Airlines | 22:40 | 00:18 | 2h 38m | Airbus A320neo | | Sat, Oct 24 | UA 1874 | United Airlines | 05:15 | 06:47 | 2h 32m | Airbus A321neo family | | Sat, Oct 24 | UA 2415 | United Airlines | 06:20 | 07:52 | 2h 32m | Airbus A321neo family | | Sat, Oct 24 | F9 3229 | Frontier Airlines | 06:24 | 08:05 | 2h 41m | [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md) | | Sat, Oct 24 | UA 1575 | United Airlines | 07:20 | 08:55 | 2h 35m | Airbus A321neo family | | Sat, Oct 24 | UA 1686 | United Airlines | 08:30 | 10:07 | 2h 37m | Airbus A321neo family | | Sat, Oct 24 | UA 1450 | United Airlines | 09:35 | 11:12 | 2h 37m | Airbus A321neo family | | Sat, Oct 24 | F9 3227 | Frontier Airlines | 10:31 | 12:12 | 2h 41m | Airbus A321neo family | | Sat, Oct 24 | UA 2787 | United Airlines | 10:32 | 12:09 | 2h 37m | Airbus A321neo family | | Sat, Oct 24 | UA 2168 | United Airlines | 12:34 | 14:14 | 2h 40m | Boeing 757-300 | | Sat, Oct 24 | UA 2767 | United Airlines | 15:00 | 16:45 | 2h 45m | Airbus A321neo family | | Sat, Oct 24 | UA 470 | United Airlines | 16:30 | 18:21 | 2h 51m | Airbus A321neo family | | Sat, Oct 24 | UA 1654 | United Airlines | 18:17 | 20:08 | 2h 51m | Boeing 757-300 | Showing the first 40 of 108 scheduled IAH to DEN departures across 7 days with service, starting October 22, 2026. Every remaining date is on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every IAH to DEN date on the interactive map ## Aircraft on the Houston to Denver nonstop In the schedule table on this page, United Airlines flies the [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md), the [Boeing 757-300](https://2lnr.com/seatmaps/ua/757-300.md), and the [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md), and Frontier Airlines flies the [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md), the [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md), and the [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md). Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## The full IAH to DEN nonstop schedule This page carries the full IAH to DEN nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each IAH to DEN nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See IAH to DEN on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Houston to Denver nonstop Carriers operating IAH to DEN nonstop in the current schedule. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) - [Frontier Airlines (F9) route map](https://2lnr.com/routes/airlines/f9.md)\ [The aircraft F9 flies](https://2lnr.com/seatmaps/f9.md) See IAH to DEN on the interactive map → ## Frequently asked questions about IAH to DEN **How long is the flight from Houston (IAH) to Denver (DEN)?** Scheduled flight times from Houston (IAH) to Denver (DEN) run from 2h 32m to 2h 51m across the departures in the schedule table on this page. The nonstop covers about 863 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from IAH to DEN?** United Airlines and Frontier Airlines fly IAH to DEN nonstop. 2LNR doesn't show award or upgrade space for any of them on IAH to DEN, so this page carries the schedule rather than a space claim. **How many flights a week are there from IAH to DEN?** About 115 nonstop flights a week run between Houston (IAH) and Denver (DEN) in the current schedule, operated by United Airlines and Frontier Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from IAH to DEN depart?** Scheduled IAH to DEN nonstops in the next 7 days with service leave between 05:15 and 22:40, local time at Houston. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate IAH to DEN nonstop?** The schedule table on this page lists 14 flight numbers for IAH to DEN nonstops, including UA 1450, UA 1575, UA 1686, UA 1874, UA 2415, and UA 2787 on United Airlines, and F9 3227 and F9 3229 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on IAH to DEN?** Not on this route: 2LNR doesn't show award or upgrade space for any airline flying IAH to DEN. The page carries the full IAH to DEN nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [DEN to IAH nonstop flights](https://2lnr.com/routes/den-iah.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Houston (IAH)](https://2lnr.com/routes/iah.md), or [every route from Denver (DEN)](https://2lnr.com/routes/den.md). Nonstops to Denver (DEN) from other airports within 150 miles of Houston (IAH): - [Austin (AUS) to Denver (DEN)](https://2lnr.com/routes/aus-den.md), 140 miles from IAH Nonstops from Houston (IAH) to other airports within 150 miles of Denver (DEN): - [Houston (IAH) to Colorado Springs (COS)](https://2lnr.com/routes/iah-cos.md), 73 miles from DEN - [Houston (IAH) to Eagle (EGE)](https://2lnr.com/routes/iah-ege.md), 119 miles from DEN - [Houston (IAH) to Aspen (ASE)](https://2lnr.com/routes/iah-ase.md), 124 miles from DEN - [Houston (IAH) to Hayden (HDN)](https://2lnr.com/routes/iah-hdn.md), 141 miles from DEN Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full IAH to DEN nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)