Showing Southwest only (incl. its regional partners)All airlines ×
3 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines
No nonstop, and no clear pattern: the best connection reaches Seattle on time 4 times in 5.
Flights, best and worst
Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
No Southwest flight on this route ran 150+ times in the year.
Nonstops by airline and airport
Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
| Southwest | SFO | SEA | – | 100%few flights | 0.0% | 3 | Not flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | SFO 05:30 → PHX 07:30WN 4145 | 3h 15m Phoenix | PHX 10:45 → SEA 13:50WN 814 | 8h 20m | 100% | 81% |
| SouthwestDetails → | SFO 05:10 → DEN 08:40WN 1424 | 1h 25m Denver | DEN 10:05 → SEA 12:05WN 3051 | 6h 55m | 96% | 73% |
| SouthwestDetails → | SFO 05:00 → LAS 06:35WN 4231 | 1h 05m Las Vegas | LAS 07:40 → SEA 10:25WN 739 | 5h 25m | 93% | 70% |
About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON