Nonstop flights from Houston to Denver

3 airlines fly from 2 Houston airports (IAH and HOU) to Denver (DEN), with up to 20 flights a day.

IAHDEN

Routes

2 airport pairs

When they leave

Houston time

5:15a10:14pFirst departure 5:15 AM, last 10:14 PM

11 in the morning, 5:15 AM to 11:05 AM, then six in the afternoon, 12:10 PM to 4:27 PM, then eight in the evening, 5:00 PM to 10:14 PM.

Every flight

Earliest first

5:15 AM→6:47 AMIAH to DENUnited AirlinesAirbus A321neoDaily
6:30 AM→8:02 AMIAH to DENUnited AirlinesAirbus A321neoMon, Thu, Fri
6:30 AM→8:14 AMIAH to DENFrontier AirlinesAirbus A320neoDaily
6:45 AM→8:10 AMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Mon, Tue, Wed, Thu, Fri
7:20 AM→8:55 AMIAH to DENUnited AirlinesAirbus A321neoDaily
7:55 AM→9:25 AMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Mon, Thu, Fri, Sun
8:30 AM→10:07 AMIAH to DENUnited AirlinesAirbus A321neoDaily
9:05 AM→10:30 AMHOU to DENSouthwest AirlinesBoeing 737Mon, Thu, Fri
9:25 AM→10:55 AMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Tue, Wed, Sun
9:33 AM→11:10 AMIAH to DENUnited AirlinesAirbus A321neoDaily
10:31 AM→12:08 PMIAH to DENUnited AirlinesAirbus A321neoDaily
11:05 AM→12:30 PMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Tue, Wed
12:10 PM→1:35 PMHOU to DENSouthwest AirlinesBoeing 737Mon, Thu, Fri, Sat
12:30 PM→2:15 PMIAH to DENUnited AirlinesAirbus A321neoDaily
3:00 PM→4:30 PMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Sun
3:00 PM→4:45 PMIAH to DENUnited AirlinesAirbus A321neoDaily
3:20 PM→5:00 PMHOU to DENSouthwest AirlinesBoeing 737-700Tue, Wed, Sat
4:20 PM→5:55 PMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Mon, Thu, Fri, Sun
4:27 PM→6:18 PMIAH to DENUnited AirlinesAirbus A321neoDaily
5:00 PM→6:45 PMHOU to DENSouthwest AirlinesBoeing 737-700Sun
6:10 PM→7:45 PMHOU to DENSouthwest AirlinesBoeing 737Mon, Tue, Wed, Thu, Fri, Sun
6:14 PM→8:03 PMIAH to DENFrontier AirlinesAirbus A321neoDaily
6:18 PM→8:09 PMIAH to DENUnited AirlinesBoeing 757Daily
8:24 PM→10:15 PMIAH to DENUnited AirlinesAirbus A321neoDaily
8:35 PM→10:05 PMHOU to DENSouthwest AirlinesBoeing 737 MAX 8Tue, Wed, Sat, Sun
10:09 PM→11:58 PMIAH to DENFrontier AirlinesAirbus A321neoMon, Fri, Sun
10:14 PM→12:03 AM⁺¹IAH to DENFrontier AirlinesAirbus A321neoThu

Schedules last checked Sep 19, 2026. Times are local.

Flying from Houston to Denver

United Airlines flies most often, 10 to 11 times a day on the Airbus A321neo and Boeing 757. Southwest Airlines flies 3 to 7 times a day on the Boeing 737 MAX 8, Boeing 737 and Boeing 737-700. Frontier Airlines flies 2 to 3 times a day on the Airbus A321neo and Airbus A320neo.

Flights run every day of the week, from 15 on Saturdays to 20 on Mondays, Thursdays, Fridays and Sundays. The first arrival in Denver is at 6:47 AM and the last at 12:03 AM the next day.

IAH to DEN is the busiest airport pair, with 91 flights a week, then HOU to DEN with 40.

Flying back, Denver to Houston has 123 nonstop flights a week.

Return flights

Denver to HoustonView

Find the cheapest day to fly from Houston to Denver.

Schedules as of Oct 9, 2026.