Route on-time record
OAK to SEA: most on-time flights and the best time to fly
Oakland (Oakland San Francisco Bay Airport) to Seattle (Seattle–Tacoma International Airport). 1,934 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Southwest 4375 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
OAK → SEA
Oakland to Seattle: 1,934 nonstop flights a year
On time (12 months)
77%
Cancelled
0.9%
avg delay 12 min
Best time to leave
Before 9 AM
93% on time vs 62% after 9 PM
Most reliable airline
SkyWest
78% chance on time
Lowest nonstop fare seen in the next two months: $73 (Southwest 4519 on 2026-11-07). 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 · Southwest 4375
7:00 AM → 9:10 AM2h 10m nonstop
Local times, typical schedule. Last flown 2026-04-01.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 62%).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 4375 fares Opens this date on Aviasales#2 · Alaska 705
7:00 AM → 9:11 AM2h 11m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 89%
- Cancelled
- 2.8%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (171 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 62%).
Moderate track record · 171 flights
Find Alaska 705 fares Opens this date on Aviasales#3 · Southwest 1217
11:35 AM → 1:50 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
- On time (history)
- 86%
- Cancelled
- 6.7%
- Avg arrival delay
- 4 min
- Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find Southwest 1217 fares Opens this date on Aviasales#4 · Southwest 1499
6:35 AM → 8:40 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 65%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 65% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 93% on time; After 9 PM: 62%).
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 1499 fares Opens this date on Aviasales#5 · Alaska 733
2:09 PM → 4:18 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 85% of the time (40 flights, Jun 2025 to May 2026).
- Never cancelled in 40 scheduled flights.
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (40 flights), so its score leans on the airline's record at this hour.
Limited track record · 40 flights
Find Alaska 733 fares Opens this date on Aviasales#6 · Southwest 1722
9:00 AM → 11:05 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 74% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Short track record (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find Southwest 1722 fares Opens this date on Aviasales#7 · Southwest 1184
5:30 PM → 7:40 PM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-30.
74%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1184 fares Opens this date on Aviasales#8 · Alaska 470
5:31 PM → 7:40 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-03-17.
72%
chance on time
- On time (history)
- 79%
- Cancelled
- 2.9%
- Avg arrival delay
- 11 min
- Arrived on time 79% of the time (33 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Alaska 470 fares Opens this date on Aviasales#9 · Southwest 2080
9:55 PM → 12:10 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 80% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 62% on time; Before 9 AM: 93%).
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 2080 fares Opens this date on Aviasales#10 · Alaska 374
6:40 PM → 8:48 PM2h 08m nonstop
Local times, typical schedule. Last flown 2026-04-20.
71%
chance on time
- On time (history)
- 67%
- Cancelled
- 2.9%
- Avg arrival delay
- 14 min
- Arrived on time 67% of the time (33 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Alaska 374 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%
101 flights · 77% on time as flown · 1.3% cancel
- Alaska Airlines78%
679 flights · 79% on time as flown · 1.6% cancel
- Southwest Airlines77%
1,154 flights · 76% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
593 flights · avg delay 6 min
- 9 AM to noon82%
248 flights · avg delay 7 min
- Noon to 3 PM68%
469 flights · avg delay 18 min
- 3 to 6 PM69%
197 flights · avg delay 17 min
- 6 to 9 PM70%
287 flights · avg delay 16 min
- After 9 PM62%
140 flights · avg delay 18 min
Best day: Tuesday (86%). Worst: Friday (73%).
Smarter routing
Nearby airports that run more on time
SJC → SEA 83% chance on time
Norman Y. Mineta San Jose International Airport to Seattle–Tacoma International Airport · 4,379 flights a year · 29 mi from your airports · yours: 77%
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.
What delays this route
- Late-arriving aircraft48%
- Airline (crew, maintenance, boarding)34%
- Air traffic control and airport volume17%
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
OAK to SEA questions
- What time of day is best to fly OAK to SEA?
- Before 9 AM: 93% of flights arrived on time, against 62% for departures after 9 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 OAK to SEA?
- SkyWest, with a season-adjusted 78% chance of operating and arriving on time over 101 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 OAK to SEA?
- June (70% on time); the best was November (90%), 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 OAK
- SEA to OAK (return)
- OAK to LAS 80%
- OAK to SAN 69%
- OAK to BUR 82%
- OAK to SNA 86%
- OAK to LAX 81%
- OAK to PHX 78%
- OAK to SLC 89%
- OAK to LGB 87%
- OAK to DEN 73%
- OAK to ONT 83%
- OAK to PDX 81%
- OAK to HNL 80%
Live status: FAA delays and ground stops