PlainFlights

Route · IAH → OKC · 2020–2025 BTS data

Houston to Oklahoma City

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to OKC (Houston to Oklahoma City) ranks #1546 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

81.3%
On-time
+2.3 pts
vs US avg
85 min
Delay when late
7,967
Flights
#1546 of 4927
Corpus placement

Cancelled

1.5%

Best Month

Oct 2025 88%

Worst Month

May 2024 55%

Distance

395 mi

Carriers

15

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 109 20 0 1 UA,OO
Nov 2025 82 18 0 0 OO,UA
Oct 2025 97 12 0 0 OO,UA
Sep 2025 80 11 0 0 UA,OO
Aug 2025 136 29 0 0 OO,UA
Jul 2025 206 55 2 1 OO,UA
Jun 2025 167 56 4 0 OO,UA
May 2025 136 42 1 2 OO
Apr 2025 126 31 0 2 OO
Mar 2025 141 35 0 0 OO
Feb 2025 82 25 2 0 OO
Jan 2025 62 16 4 0 OO
Dec 2024 65 16 2 0 OO
Nov 2024 81 17 1 0 OO
Oct 2024 66 10 0 0 OO
Sep 2024 62 10 0 0 OO
Aug 2024 75 13 1 0 OO
Jul 2024 78 27 10 0 OO
Jun 2024 102 37 1 1 OO,UA
May 2024 76 34 2 1 OO,UA
Apr 2024 56 10 0 2 OO
Mar 2024 31 2 0 0 OO
Feb 2024 30 4 0 0 OO,UA
Jan 2024 51 7 4 1 OO

IAH–OKC seasonal on-time pattern

Best: September (86.1%) · weakest: July (73.7%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 83.6%

Strongest calendar month

September

86.1% on-time · ~101 flights/mo

Busiest calendar month

October

~128 flights/mo avg

Weakest calendar month

July

73.7% on-time · ~123 flights/mo

Cancellation Rate

1.5%

34 of 2,197 flights

Diversion Rate

0.5%

11 of 2,197 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

OKC - Oklahoma City

Full on-time, delay-cause, and seasonal performance for Oklahoma City, OK.

OKC on-time profile

Compare the two airports

See IAH and OKC side by side on delays, cancellations, and reliability.

Compare IAH vs OKC

Origin-hub reliability standing

Mid-pack among IAH departures

From IAH, this corridor sits with 79 other 75–85% on-time routes out of 102 tracked departures, not the hub's reliability leaders (17 at ≥85%) and not the softest ( 6 below 75%). Destination: Oklahoma City · fleet on-time rank #2614 of 4927.

What the Data Says About IAH to OKC

7,967 tracked flights put the IAH to OKC pairing (Houston to Oklahoma City) at a 81.3% on-time rate, squarely in line with the wider network. Delays that do occur run 84.7 minutes on average. Across the 395-mile route and its 15 carriers, the trailing 24 months show 1.5% cancelled and 0.5% diverted (2,197 flights sampled).

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 88% on-time, while May 2024 came in at just 55% - a 32-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–OKC peaks in September at 86.1% on-time while October carries the heaviest traffic (~128 flights per month) ; the softest month is July at 73.7%, a 12.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to OKC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to OKC ranks #1546 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from IAH to OKC? ▼
Flights from Houston to Oklahoma City have a 81.3% on-time rate based on 7,967 flights. The average delay is 84.7 minutes. The best recent month was Oct 2025 with 88% on-time.
What is the cancellation rate for IAH to OKC? ▼
Over the last 24 months, 1.5% of flights on this route were cancelled (34 of 2,197 flights) and 0.5% were diverted.
How far is the flight from IAH to OKC? ▼
The flight distance from Houston (IAH) to Oklahoma City (OKC) is approximately 395 miles. This route is served by 15 carriers.
When is the best time to fly from IAH to OKC? ▼
The best recent month for on-time performance was Oct 2025 (88% on-time). The worst was May 2024 (55% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
OKC Airport

Oklahoma City
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using IAH–OKC data

IAH–OKC is mid-pack at 81.3% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAH and OKC airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, September (86.1% on-time) beats July (73.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 81.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.