ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
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%
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