OKC to IAH flight delays & on-time performance
Nonstop flights from OKC Will Rogers World Airport to George Bush Intercontinental Airport · 395 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at OKC or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Oklahoma City (OKC) to Houston (IAH) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1% were cancelled, and 6% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (86% on time); United Airlines was the least (79%).
- Departures scheduled around 5am did best (90% on time); around 5pm did worst (71%).
- Wednesday was the most reliable day to fly (92% on time) and Sunday the least (78%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Which airline is most on time from OKC to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 86% | 0.9% | 11 min | 5.3% | 976 |
| United Airlines | 79% | 1.3% | 16 min | 6.6% | 309 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am90%221 flights
- 7am82%322 flights
- 8am87%53 flights
- 9am88%165 flights
- 12pm81%16 flights
- 1pm86%362 flights
- 5pm71%105 flights
- 7pm76%29 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday82%1.1% cancelled
- Tuesday87%0.6% cancelled
- Wednesday92%1.1% cancelled
- Thursday84%0.0% cancelled
- Friday81%0.0% cancelled
- Saturday85%3.1% cancelled
- Sunday78%1.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion29%
- Late-arriving aircraft26%
- Extreme weather7%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather85%
- Airline (crew, maintenance, cleaning, fueling)15%
- Air traffic control & airport congestion0%
- Security0%
OKC to IAH: common questions
- How often are OKC to IAH flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Oklahoma City to Houston cancelled?
- 1.0% of scheduled flights were cancelled (13 of 1,285).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 73 min behind schedule on average, and 5.6% of flights were an hour or more late.
- How long is taxi time at OKC?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to OKC — 80% on time
More flights from Oklahoma City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: OKC → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.