Houston (IAH) to Oklahoma City (OKC)
Flight time
≈ 1h 36m
Bearing
341° N
Houston (IAH) to Oklahoma City (OKC) is 396 miles (637 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAH–OKC
US DOT T-100 · filed dataIn April 2026, SkyWest Airlines operated the most departures, one of 4 carriers flying nonstop IAH–OKC; the Embraer E175 was the most common aircraft at 83% of departures; flights ran 72% full.
Departures
408
April 2026
Seats
33,622
both directions
Passengers
24,239
both directions
Load factor
72.1%
passengers ÷ seats
Who flies IAH–OKC?
SkyWest Airlines operated the most nonstop IAH–OKC departures in April 2026 (178), one of 4 carriers on the route.
- OO
SkyWest Airlines
178 departures · 12,842 seats
Share of departures43.6%73.0%
Load
- YV
Mesa Airlines
162 departures · 11,604 seats
Share of departures39.7%82.2%
Load
- UA
United Airlines
58 departures · 8,676 seats
Share of departures14.2%57.3%
Load
- C5
CommuteAir
10 departures · 500 seats
Share of departures2.5%69.0%
Load
What plane flies IAH–OKC?
In April 2026, the Embraer E175 flew 83% of IAH–OKC departures — more than any other aircraft type.
- Embraer E175
339 departures · 77.5% load
83.1% - Airbus A320
57 departures · 57.1% load
14.0% - Embraer ERJ-145
10 departures · 69.0% load
2.5% - Bombardier CRJ-200
1 departures · 0.0% load
0.3% - Airbus A319
1 departures · 69.8% load
0.3%
How has IAH–OKC traffic changed?
Nonstop IAH–OKC departures fell from 456 in May 2025 to 408 in April 2026.
Monthly nonstop IAH–OKC traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
456 departures · 29,724 passengers
87.1%
Load
June 2025
440 departures · 29,352 passengers
88.3%
Load
July 2025
458 departures · 31,828 passengers
79.5%
Load
August 2025
450 departures · 26,342 passengers
77.8%
Load
September 2025
428 departures · 25,814 passengers
77.7%
Load
October 2025
476 departures · 28,882 passengers
73.9%
Load
November 2025
462 departures · 25,051 passengers
68.0%
Load
December 2025
399 departures · 24,628 passengers
76.4%
Load
January 2026
376 departures · 23,329 passengers
80.1%
Load
February 2026
402 departures · 24,868 passengers
77.7%
Load
March 2026
414 departures · 23,112 passengers
69.3%
Load
April 2026
408 departures · 24,239 passengers
72.1%
Load
By direction
The DOT files each direction separately — they rarely match.
IAH → OKC
73.0% full
204 departures · 12,206 passengers
OKC → IAH
71.2% full
204 departures · 12,033 passengers
Nonstop IAH–OKC 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 Houston (IAH) from Oklahoma City (OKC)?
IAH to OKC is 396 miles (637 km / 344 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAH to OKC?
A nonstop covers the 396-mile great-circle distance in roughly 1h 36m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAH–OKC?
In April 2026, the Embraer E175 flew the largest share of departures (83.1%), followed by the Airbus A320 (14.0%).
What mileage do I earn flying IAH–OKC?
Distance-based programs credit off the 396-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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