Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

IAH to OKC: most on-time flights and the best time to fly

Houston (George Bush Intercontinental Airport) to Oklahoma City (OKC Will Rogers World Airport). 1,476 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.4% were cancelled. The most reliable flight number was SkyWest 4795 at 7:35 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

IAH → OKC

Houston to Oklahoma City: 1,476 nonstop flights a year

On time (12 months)

78%

Cancelled

1.4%

avg delay 20 min

Best time to leave

3 to 6 PM

88% on time vs 71% 6 to 9 PM

Most reliable airline

United

81% chance on time

Check IAH to OKC fares

Lowest nonstop fare seen in the next two months: $240 (United 6140 on 2026-10-26). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · SkyWest 4795 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:35 AM → 9:17 AM1h 42m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    82%

    chance on time

    On time (history)
    83%
    Cancelled
    0.5%
    Avg arrival delay
    10 min
    • Arrived on time 83% of the time (185 flights, Jun 2025 to May 2026).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Moderate track record · 185 flights

    Find 7:35 AM flight fares Opens this date on Aviasales

  2. #2 · United 1360

    7:50 PM → 9:29 PM1h 39m nonstop

    Local times, typical schedule. Last flown 2026-04-28.

    81%

    chance on time

    On time (history)
    87%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 87% of the time (31 flights, Jun 2025 to May 2026).
    • Never cancelled in 31 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Limited track record · 31 flights

    Find United 1360 fares Opens this date on Aviasales

  3. #3 · SkyWest 5450 · sold as United Express, Delta Connection, American Eagle or Alaska

    2:32 PM → 4:12 PM1h 40m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    81%

    chance on time

    On time (history)
    82%
    Cancelled
    0.6%
    Avg arrival delay
    15 min
    • Arrived on time 82% of the time (169 flights, Jun 2025 to May 2026).
    • Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.

    Moderate track record · 169 flights

    Find 2:32 PM flight fares Opens this date on Aviasales

  4. #4 · SkyWest 5709 · sold as United Express, Delta Connection, American Eagle or Alaska

    9:30 PM → 11:05 PM1h 35m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    78%

    chance on time

    On time (history)
    79%
    Cancelled
    1.6%
    Avg arrival delay
    24 min
    • Arrived on time 79% of the time (239 flights, Jun 2025 to May 2026).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
    • 62% of its delay minutes came from the plane arriving late from an earlier flight.

    Strong track record · 239 flights

    Find 9:30 PM flight fares Opens this date on Aviasales

  5. #5 · United 592

    8:00 PM → 9:40 PM1h 40m nonstop

    Local times, typical schedule. Last flown 2026-03-27.

    77%

    chance on time

    On time (history)
    77%
    Cancelled
    2.3%
    Avg arrival delay
    12 min
    • Arrived on time 77% of the time (43 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
    • Short track record (43 flights), so its score leans on the airline's record at this hour.

    Limited track record · 43 flights

    Find United 592 fares Opens this date on Aviasales

  6. #6 · United 2304

    8:12 PM → 9:47 PM1h 35m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    76%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    8 min
    • Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
    • Short track record (11 flights), so its score leans on the airline's record at this hour.

    Limited track record · 11 flights

    Find United 2304 fares Opens this date on Aviasales

  7. #7 · United 1955

    6:36 PM → 8:15 PM1h 39m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    76%

    chance on time

    On time (history)
    80%
    Cancelled
    4.8%
    Avg arrival delay
    18 min
    • Arrived on time 80% of the time (20 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
    • 67% of its delay minutes came from the plane arriving late from an earlier flight.

    Limited track record · 20 flights

    Find United 1955 fares Opens this date on Aviasales

  8. #8 · SkyWest 5278 · sold as United Express, Delta Connection, American Eagle or Alaska

    6:05 PM → 7:42 PM1h 38m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    68%

    chance on time

    On time (history)
    70%
    Cancelled
    2.1%
    Avg arrival delay
    27 min
    • Arrived on time 70% of the time (280 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Strong track record · 280 flights

    Find 6:05 PM flight fares Opens this date on Aviasales

  9. #9 · SkyWest 5334 · sold as United Express, Delta Connection, American Eagle or Alaska

    7:50 PM → 9:27 PM1h 37m nonstop

    Local times, typical schedule. Last flown 2026-05-20.

    68%

    chance on time

    On time (history)
    66%
    Cancelled
    2.6%
    Avg arrival delay
    38 min
    • Arrived on time 66% of the time (149 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (6 to 9 PM: 71% on time; 3 to 6 PM: 88%).
    • Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).

    Moderate track record · 149 flights

    Find 7:50 PM flight fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    281 flights · 84% on time as flown · 1.4% cancel

  • SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)77%

    1,195 flights · 77% on time as flown · 1.3% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM87%

    240 flights · avg delay 8 min

  • 9 AM to noon88%

    98 flights · avg delay 9 min

  • Noon to 3 PM78%

    189 flights · avg delay 20 min

  • 3 to 6 PM88%

    133 flights · avg delay 10 min

  • 6 to 9 PM71%

    579 flights · avg delay 26 min

  • After 9 PM78%

    237 flights · avg delay 24 min

Best day: Thursday (80%). Worst: Monday (73%).

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
80
F
77
M
79
A
78
M
70
J
69
J
71
A
82
S
83
O
82
N
81
D
81

What delays this route

  • Late-arriving aircraft41%
  • Airline (crew, maintenance, boarding)32%
  • Air traffic control and airport volume14%
  • Severe weather12%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

IAH to OKC questions

What time of day is best to fly IAH to OKC?
3 to 6 PM: 88% of flights arrived on time, against 71% for departures 6 to 9 PM.
Which airline is most on time from IAH to OKC?
United, with a season-adjusted 81% chance of operating and arriving on time over 281 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on IAH to OKC?
June (69% on time); the best was September (83%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from IAH

Live status: FAA delays and ground stops