Denver (DEN) to Houston (IAH) flights: who flies it

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
Thu, Oct 22	F9 3206	Frontier Airlines	06:10	09:36	2h 26m	Airbus A320
Thu, Oct 22	UA 1720	United Airlines	07:40	11:08	2h 28m	Boeing 757-300
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
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
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
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
Sat, Oct 24	UA 320	United Airlines	05:00	08:27	2h 27m	Boeing 737-900
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, the Boeing 737 MAX 9, the Boeing 757-300, and the Boeing 737-900, and Frontier Airlines flies the Airbus A320, the Airbus A321, the Airbus A320neo, and the Airbus A321neo family. 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.

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.