Denver (DEN) to Houston (IAH)
Flight time
≈ 2h 31m
Bearing
139° SE
Denver (DEN) to Houston (IAH) is 862 miles (1,387 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies DEN–IAH
US DOT T-100 · filed dataIn April 2026, United Airlines operated the most departures, one of 3 carriers flying nonstop DEN–IAH; the Airbus A321neo was the most common aircraft at 53% of departures; flights ran 80% full.
Departures
724
April 2026
Seats
154,021
both directions
Passengers
123,402
both directions
Load factor
80.1%
passengers ÷ seats
Who flies DEN–IAH?
United Airlines operated the most nonstop DEN–IAH departures in April 2026 (602), one of 3 carriers on the route.
- UA
United Airlines
602 departures · 129,213 seats
Share of departures83.1%81.0%
Load
- F9
Frontier Airlines
120 departures · 24,688 seats
Share of departures16.6%76.0%
Load
- OO
SkyWest Airlines
2 departures · 120 seats
Share of departures0.3%0.0%
Load
What plane flies DEN–IAH?
In April 2026, the Airbus A321neo flew 53% of DEN–IAH departures — more than any other aircraft type.
- Airbus A321neo
386 departures · 80.4% load
53.3% - Boeing 737-900ER
68 departures · 73.4% load
9.4% - Boeing 737 MAX 9
64 departures · 75.2% load
8.8% - Boeing 757-300
64 departures · 87.0% load
8.8% - Boeing 777-200
59 departures · 84.7% load
8.2% - Airbus A320neo
51 departures · 78.3% load
7.0% - Airbus A321
17 departures · 73.3% load
2.4% - Airbus A320
8 departures · 64.3% load
1.1% - Airbus A319
2 departures · 87.3% load
0.3% - Boeing 737-800
2 departures · 54.8% load
0.3% - Embraer E175
1 departures · 0.0% load
0.1% - Boeing 737-900
1 departures · 69.8% load
0.1% - Bombardier CRJ-200
1 departures · 0.0% load
0.1%
How has DEN–IAH traffic changed?
Nonstop DEN–IAH departures fell from 751 in May 2025 to 724 in April 2026.
Monthly nonstop DEN–IAH traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
751 departures · 132,162 passengers
87.2%
Load
June 2025
788 departures · 144,498 passengers
90.0%
Load
July 2025
809 departures · 153,090 passengers
89.4%
Load
August 2025
811 departures · 137,462 passengers
84.5%
Load
September 2025
771 departures · 124,578 passengers
84.7%
Load
October 2025
806 departures · 136,408 passengers
85.0%
Load
November 2025
716 departures · 129,853 passengers
78.5%
Load
December 2025
793 departures · 150,599 passengers
87.2%
Load
January 2026
786 departures · 134,072 passengers
84.3%
Load
February 2026
705 departures · 126,937 passengers
85.4%
Load
March 2026
816 departures · 138,956 passengers
81.7%
Load
April 2026
724 departures · 123,402 passengers
80.1%
Load
By direction
The DOT files each direction separately — they rarely match.
IAH → DEN
81.8% full
363 departures · 63,212 passengers
DEN → IAH
78.4% full
361 departures · 60,190 passengers
Nonstop DEN–IAH traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Denver (DEN) from Houston (IAH)?
DEN to IAH is 862 miles (1,387 km / 749 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from DEN to IAH?
A nonstop covers the 862-mile great-circle distance in roughly 2h 31m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies DEN–IAH?
In April 2026, the Airbus A321neo flew the largest share of departures (53.3%), followed by the Boeing 737-900ER (9.4%).
What mileage do I earn flying DEN–IAH?
Distance-based programs credit off the 862-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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