Southwest Airlines PHX to SEA on-time performance
Southwest Airlines nonstop flights from Phoenix to Seattle · Aug 2025 – Jul 2026
On-time arrivals
63%
arrived < 15 min late
Cancelled
0.6%
6 flights
Avg arrival delay
18 min
45 min when late
Rank on route
#7 of 7
route average 82% on time
Key facts
- Southwest Airlines flights on PHX to SEA arrived on time 63% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 8% arrived an hour or more late.
- That ranks #7 of 7 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was late-arriving aircraft (49%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)37%
- Air traffic control & airport congestion12%
- Extreme weather1%
- Security1%
Other airlines on PHX to SEA
- Alaska Airlines85% on time · 10 min avg delay
- Delta Air Lines88% on time · 10 min avg delay
- Envoy Air88% on time · 7 min avg delay
- SkyWest Airlines83% on time · 12 min avg delay
- American Airlines82% on time · 11 min avg delay
- Frontier Airlines85% on time · 13 min avg delay
Full PHX to SEA comparison →
Southwest Airlines on-time record across all routes →
1,040 Southwest Airlines flights tracked on this route; 6 cancelled, 1 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.