Delta Air Lines PHX to SEA on-time performance
Delta Air Lines nonstop flights from Phoenix to Seattle · Aug 2025 – Jul 2026
On-time arrivals
88%
arrived < 15 min late
Cancelled
1.0%
17 flights
Avg arrival delay
10 min
74 min when late
Rank on route
#2 of 7
route average 82% on time
Key facts
- Delta Air Lines flights on PHX to SEA arrived on time 88% of the time in Aug 2025 – Jul 2026.
- 1% were cancelled, and 4% arrived an hour or more late.
- That ranks #2 of 7 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was late-arriving aircraft (58%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft58%
- Airline (crew, maintenance, cleaning, fueling)24%
- Air traffic control & airport congestion13%
- Extreme weather5%
- Security0%
Other airlines on PHX to SEA
- Alaska Airlines85% on time · 10 min avg delay
- Southwest Airlines63% on time · 18 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 →
Delta Air Lines on-time record across all routes →
1,765 Delta Air Lines flights tracked on this route; 17 cancelled, 3 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.