--- title: "Denver (DEN) to Houston (IAH) flights: who flies it" description: "United Airlines and Frontier Airlines fly nonstop from DEN to IAH, about 99 flights a week, covering 863 miles. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/den-iah" url: "https://2lnr.com/routes/den-iah.md" date_modified: "2026-10-18T05:10:47Z" --- # Denver to Houston (DEN-IAH): nonstop flights and who flies them United Airlines and Frontier Airlines fly nonstop between Denver (DEN) and Houston (IAH), roughly 99 times a week. The timetable below shows the nonstop scheduled at 2h 25m to 2h 36m 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 22, 2026. See DEN to IAH on the interactive map [Get started free](https://2lnr.com/login) 99 Flights a week, 4-week average 2h 25m to 2h 36m Scheduled flight time 863 mi Nonstop distance Free To get started ## Denver to Houston flight schedule Scheduled nonstop departures for DEN to IAH 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 Denver (DEN) to Houston (IAH) | Date | Flight | Airline | Departs DEN | Arrives IAH | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 320 | United Airlines | 05:00 | 08:28 | 2h 28m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.md) | | Thu, Oct 22 | F9 3206 | Frontier Airlines | 06:10 | 09:36 | 2h 26m | [Airbus A320](https://2lnr.com/seatmaps/f9/a320.md) | | Thu, Oct 22 | UA 1720 | United Airlines | 07:40 | 11:08 | 2h 28m | [Boeing 757-300](https://2lnr.com/seatmaps/ua/757-300.md) | | Thu, Oct 22 | UA 2030 | United Airlines | 10:07 | 13:40 | 2h 33m | Boeing 737 MAX 9 | | Thu, Oct 22 | UA 1599 | United Airlines | 11:47 | 15:18 | 2h 31m | [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md) | | Thu, Oct 22 | UA 1829 | United Airlines | 13:30 | 17:01 | 2h 31m | Boeing 757-300 | | Thu, Oct 22 | UA 489 | United Airlines | 15:35 | 19:06 | 2h 31m | Airbus A321neo family | | Thu, Oct 22 | UA 588 | United Airlines | 16:20 | 19:51 | 2h 31m | Airbus A321neo family | | Thu, Oct 22 | UA 1587 | United Airlines | 17:25 | 20:55 | 2h 30m | Airbus A321neo family | | Thu, Oct 22 | UA 1055 | United Airlines | 18:10 | 21:46 | 2h 36m | Boeing 737 MAX 9 | | Thu, Oct 22 | F9 3228 | Frontier Airlines | 18:16 | 21:45 | 2h 29m | [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md) | | Thu, Oct 22 | UA 475 | United Airlines | 19:33 | 22:59 | 2h 26m | Airbus A321neo family | | Thu, Oct 22 | UA 2419 | United Airlines | 20:34 | 23:59 | 2h 25m | Boeing 737 MAX 9 | | Thu, Oct 22 | F9 2996 | Frontier Airlines | 21:12 | 00:40 | 2h 28m | Airbus A321 | | Fri, Oct 23 | UA 320 | United Airlines | 05:00 | 08:28 | 2h 28m | Airbus A321neo family | | Fri, Oct 23 | F9 3206 | Frontier Airlines | 06:10 | 09:36 | 2h 26m | Airbus A320 | | Fri, Oct 23 | UA 1720 | United Airlines | 07:40 | 11:08 | 2h 28m | Boeing 757-300 | | Fri, Oct 23 | UA 2030 | United Airlines | 10:07 | 13:40 | 2h 33m | Boeing 737 MAX 9 | | Fri, Oct 23 | UA 1599 | United Airlines | 11:47 | 15:18 | 2h 31m | Airbus A321neo family | | Fri, Oct 23 | UA 1829 | United Airlines | 13:30 | 17:01 | 2h 31m | Boeing 757-300 | | Fri, Oct 23 | UA 489 | United Airlines | 15:35 | 19:06 | 2h 31m | Airbus A321neo family | | Fri, Oct 23 | UA 588 | United Airlines | 16:20 | 19:51 | 2h 31m | Airbus A321neo family | | Fri, Oct 23 | UA 1587 | United Airlines | 17:25 | 20:55 | 2h 30m | Airbus A321neo family | | Fri, Oct 23 | UA 1055 | United Airlines | 18:10 | 21:46 | 2h 36m | Boeing 737 MAX 9 | | Fri, Oct 23 | F9 3228 | Frontier Airlines | 18:16 | 21:45 | 2h 29m | [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.md) | | Fri, Oct 23 | UA 475 | United Airlines | 19:33 | 22:59 | 2h 26m | Airbus A321neo family | | Fri, Oct 23 | UA 2419 | United Airlines | 20:34 | 23:59 | 2h 25m | Boeing 737 MAX 9 | | Fri, Oct 23 | F9 2996 | Frontier Airlines | 21:12 | 00:40 | 2h 28m | [Airbus A321neo family](https://2lnr.com/seatmaps/f9/a321neo.md) | | Sat, Oct 24 | UA 320 | United Airlines | 05:00 | 08:27 | 2h 27m | [Boeing 737-900](https://2lnr.com/seatmaps/ua/737-900.md) | | Sat, Oct 24 | F9 3206 | Frontier Airlines | 06:10 | 09:36 | 2h 26m | Airbus A320 | | Sat, Oct 24 | UA 1720 | United Airlines | 07:40 | 11:08 | 2h 28m | Boeing 757-300 | | Sat, Oct 24 | UA 2030 | United Airlines | 10:07 | 13:40 | 2h 33m | Airbus A321neo family | | Sat, Oct 24 | UA 1599 | United Airlines | 11:47 | 15:18 | 2h 31m | Airbus A321neo family | | Sat, Oct 24 | UA 1829 | United Airlines | 13:30 | 17:01 | 2h 31m | Boeing 757-300 | | Sat, Oct 24 | UA 489 | United Airlines | 15:35 | 19:06 | 2h 31m | Airbus A321neo family | | Sat, Oct 24 | UA 588 | United Airlines | 16:20 | 19:51 | 2h 31m | Airbus A321neo family | | Sat, Oct 24 | UA 1587 | United Airlines | 17:25 | 20:55 | 2h 30m | Airbus A321neo family | | Sat, Oct 24 | UA 1055 | United Airlines | 18:10 | 21:45 | 2h 35m | Boeing 737-900 | | Sat, Oct 24 | F9 3228 | Frontier Airlines | 18:16 | 21:45 | 2h 29m | Airbus A321 | | Sat, Oct 24 | UA 475 | United Airlines | 19:33 | 22:59 | 2h 26m | Airbus A321neo family | Showing the first 40 of 103 scheduled DEN to IAH 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 DEN to IAH date on the interactive map ## Aircraft on the Denver to Houston nonstop In the schedule table on this page, United Airlines flies the [Airbus A321neo family](https://2lnr.com/seatmaps/ua/a321neo.md), the [Boeing 737 MAX 9](https://2lnr.com/seatmaps/ua/737-max-9.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 A320](https://2lnr.com/seatmaps/f9/a320.md), the [Airbus A321](https://2lnr.com/seatmaps/f9/a321.md), the [Airbus A320neo](https://2lnr.com/seatmaps/f9/a320neo.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 DEN to IAH nonstop schedule This page carries the full DEN to IAH nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each DEN to IAH nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See DEN to IAH on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Denver to Houston nonstop Carriers operating DEN to IAH 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 DEN to IAH on the interactive map → ## Frequently asked questions about DEN to IAH **How long is the flight from Denver (DEN) to Houston (IAH)?** Scheduled flight times from Denver (DEN) to Houston (IAH) run from 2h 25m to 2h 36m 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 DEN to IAH?** United Airlines and Frontier Airlines fly DEN to IAH nonstop. 2LNR doesn't show award or upgrade space for any of them on DEN to IAH, so this page carries the schedule rather than a space claim. **How many flights a week are there from DEN to IAH?** About 99 nonstop flights a week run between Denver (DEN) and Houston (IAH) 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 DEN to IAH depart?** Scheduled DEN to IAH nonstops in the next 7 days with service leave between 05:00 and 21:12, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate DEN to IAH nonstop?** The schedule table on this page lists 14 flight numbers for DEN to IAH nonstops, including UA 320, UA 489, UA 588, UA 1599, UA 1720, UA 1829, and UA 2030 on United Airlines, and F9 3206 on Frontier Airlines. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on DEN to IAH?** Not on this route: 2LNR doesn't show award or upgrade space for any airline flying DEN to IAH. The page carries the full DEN to IAH nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [IAH to DEN nonstop flights](https://2lnr.com/routes/iah-den.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Denver (DEN)](https://2lnr.com/routes/den.md), or [every route from Houston (IAH)](https://2lnr.com/routes/iah.md). Nonstops to Houston (IAH) from other airports within 150 miles of Denver (DEN): - [Colorado Springs (COS) to Houston (IAH)](https://2lnr.com/routes/cos-iah.md), 73 miles from DEN - [Eagle (EGE) to Houston (IAH)](https://2lnr.com/routes/ege-iah.md), 119 miles from DEN - [Aspen (ASE) to Houston (IAH)](https://2lnr.com/routes/ase-iah.md), 124 miles from DEN - [Hayden (HDN) to Houston (IAH)](https://2lnr.com/routes/hdn-iah.md), 141 miles from DEN Nonstops from Denver (DEN) to other airports within 150 miles of Houston (IAH): - [Denver (DEN) to Austin (AUS)](https://2lnr.com/routes/den-aus.md), 140 miles from IAH 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 DEN to IAH 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)