SEA → PHX Southwest Airlines

Southwest Airlines · Seattle, WA to Phoenix, AZ · 1,036 flights, 2025-07-01 to 2026-06-30 · aggregated across 62 flight numbers

This route runs much more reliably at some times of day than others — 95% on-time departing 6–9am vs. 46% departing 3–6pm.
On-time arrival
70%
Median delay
+3 min
90th percentile
+45 min
Cancellation rate
1%

How on-time is Southwest Airlines from SEA to PHX?

Across every Southwest Airlines flight number on SEA → PHX (1,036 flights, 2025-07-01 to 2026-06-30), 70% arrived within 15 minutes of schedule. Median arrival delay +3 min; the worst 10% ran +45 min or later. 1% were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time71570%
16-30 min14114%
31-60 min10710%
61-120 min444%
2+ hrs192%

Performance by month

MonthFlightsOn-timeAvg delay
2025-0710471%+9 min
2025-089068%+17 min
2025-098476%+11 min
2025-109271%+12 min
2025-117468%+17 min
2025-127770%+10 min
2026-016686%0 min
2026-026685%+0 min
2026-038858%+21 min
2026-048965%+16 min
2026-059375%+7 min
2026-0610353%+19 min

Performance by day of week

DayFlightsOn-time
Mon15367%
Tue14276%
Wed13974%
Thu15464%
Fri15264%
Sat15273%
Sun13471%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…