Route on-time record

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

Seattle (Seattle–Tacoma International Airport) to Oakland (Oakland San Francisco Bay Airport). 1,950 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was Southwest 3588 at 7:20 AM.

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

SEA → OAK

Seattle to Oakland: 1,950 nonstop flights a year

On time (12 months)

73%

Cancelled

0.7%

avg delay 15 min

Best time to leave

Before 9 AM

98% on time vs 61% 6 to 9 PM

Most reliable airline

SkyWest

76% chance on time

Check SEA to OAK fares

Lowest nonstop fare seen in the next two months: $80 (Southwest 855 on 2026-11-04). 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 3588
7:20 AM → 9:35 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
100%
Cancelled
2.2%
Avg arrival delay
0 min
- Arrived on time 100% of the time (45 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Southwest 3588 fares Opens this date on Aviasales
#2 · Southwest 4065
6:45 AM → 8:50 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
85%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
33 min
- Arrived on time 91% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 4065 fares Opens this date on Aviasales
#3 · Southwest 2857
6:25 AM → 8:30 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-30.
85%
chance on time
On time (history)
100%
Cancelled
0.0%
Avg arrival delay
1 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 98% on time; 6 to 9 PM: 61%).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 2857 fares Opens this date on Aviasales
#4 · Alaska 734
9:55 AM → 12:07 PM2h 17m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
On time (history)
85%
Cancelled
0.0%
Avg arrival delay
5 min
- Arrived on time 85% of the time (40 flights, Jun 2025 to May 2026).
- Never cancelled in 40 scheduled flights.
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (40 flights), so its score leans on the airline's record at this hour.
Limited track record · 40 flights
Find Alaska 734 fares Opens this date on Aviasales
#5 · Alaska 469
2:30 PM → 4:37 PM2h 07m nonstop
Local times, typical schedule. Last flown 2026-03-17.
79%
chance on time
On time (history)
84%
Cancelled
3.0%
Avg arrival delay
5 min
- Arrived on time 84% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Alaska 469 fares Opens this date on Aviasales
#6 · Alaska 706
9:31 PM → 11:43 PM2h 13m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
On time (history)
76%
Cancelled
2.5%
Avg arrival delay
13 min
- Arrived on time 76% of the time (194 flights, Jun 2025 to May 2026).
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- 51% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 194 flights
Find Alaska 706 fares Opens this date on Aviasales
#7 · Alaska 1328
3:37 PM → 5:46 PM2h 09m nonstop
Local times, typical schedule. Last flown 2026-04-21.
69%
chance on time
On time (history)
71%
Cancelled
1.3%
Avg arrival delay
14 min
- Arrived on time 71% of the time (221 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
Strong track record · 221 flights
Find Alaska 1328 fares Opens this date on Aviasales
#8 · Southwest 1053
9:55 PM → 12:10 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-04-06.
68%
chance on time
On time (history)
68%
Cancelled
0.0%
Avg arrival delay
28 min
- Arrived on time 68% of the time (28 flights, Jun 2025 to May 2026).
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 1053 fares Opens this date on Aviasales
#9 · Southwest 3668
10:15 PM → 12:30 AM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
57%
chance on time
On time (history)
13%
Cancelled
0.0%
Avg arrival delay
40 min
- Arrived on time 13% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside SEA's trouble window (4 PM to 10 PM, when 54% of its 68 ground stops and delay programs started).
- 93% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3668 fares Opens this date on Aviasales
#10 · Southwest 1801
7:45 PM → 9:55 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-30.
54%
chance on time
On time (history)
55%
Cancelled
0.0%
Avg arrival delay
20 min
- Arrived on time 55% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 61% on time; Before 9 AM: 98%).
- Departs inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Limited track record · 47 flights
Find Southwest 1801 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)76%
120 flights · 77% on time as flown · 1.1% cancel
Southwest Airlines73%
1,151 flights · 72% on time as flown · 0.2% cancel
Alaska Airlines72%
679 flights · 74% on time as flown · 1.5% cancel

On time by departure time

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

Before 9 AM98%
223 flights · avg delay 4 min
9 AM to noon76%
602 flights · avg delay 11 min
Noon to 3 PM78%
253 flights · avg delay 11 min
3 to 6 PM61%
230 flights · avg delay 24 min
6 to 9 PM61%
359 flights · avg delay 22 min
After 9 PM67%
283 flights · avg delay 18 min

Best day: Tuesday (82%). Worst: Sunday (69%).

Smarter routing

Nearby airports that run more on time

SEA → SJC 81% chance on time
Seattle–Tacoma International Airport to Norman Y. Mineta San Jose International Airport · 4,381 flights a year · 29 mi from your airports · yours: 72%
Rank flights Fares

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 aircraft59%
Airline (crew, maintenance, boarding)32%
Air traffic control and airport volume8%

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

SEA to OAK questions

What time of day is best to fly SEA to OAK?: Before 9 AM: 98% of flights arrived on time, against 61% for departures 6 to 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 SEA to OAK?: SkyWest, with a season-adjusted 76% chance of operating and arriving on time over 120 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 SEA to OAK?: August (68% on time); the best was November (82%), 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 SEA

Live status: FAA delays and ground stops

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