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Route on-time record

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

Oklahoma City (OKC Will Rogers World Airport) to Seattle (Seattle–Tacoma International Airport). 390 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Alaska 405 at 2:55 PM.

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OKC → SEA

Oklahoma City to Seattle: 390 nonstop flights a year

On time (12 months)

84%

Cancelled

0.5%

avg delay 8 min

Best time to leave

Before 9 AM

92% on time vs 82% noon to 3 PM

Most reliable airline

Alaska

83% chance on time

Check OKC to SEA fares

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 · Alaska 405

    2:55 PM → 4:59 PM4h 04m nonstop

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

    82%

    chance on time

    On time (history)
    83%
    Cancelled
    0.6%
    Avg arrival delay
    8 min
    • Arrived on time 83% of the time (351 flights, Jun 2025 to May 2026).
    • Leaves in this route's least on-time window (Noon to 3 PM: 82% on time; Before 9 AM: 92%).
    • Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.

    Strong track record · 351 flights

    Find Alaska 405 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Alaska Airlines83%

    390 flights · 84% on time as flown · 0.5% cancel

On time by departure time

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

  • Before 9 AM92%

    36 flights · avg delay 6 min

  • Noon to 3 PM82%

    287 flights · avg delay 8 min

  • 3 to 6 PM84%

    67 flights · avg delay 8 min

Best day: Saturday (85%). Worst: Sunday (79%).

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
82
F
87
M
90
A
92
M
78
J
74
J
80
A
80
S
81
O
77
N
80
D
77

What delays this route

  • Late-arriving aircraft38%
  • Air traffic control and airport volume28%
  • Airline (crew, maintenance, boarding)26%
  • Severe weather7%

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

Finding the most reliable connections from OKC to SEA…

OKC to SEA questions

What time of day is best to fly OKC to SEA?
Before 9 AM: 92% of flights arrived on time, against 82% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
Which airline is most on time from OKC to SEA?
Alaska, with a season-adjusted 83% chance of operating and arriving on time over 390 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 OKC to SEA?
June (74% on time); the best was April (92%), 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.

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Live status: FAA delays and ground stops