Delta Air Lines PDX to SEA on-time performance
Delta Air Lines nonstop flights from Portland to Seattle · Aug 2025 – Jul 2026
On-time arrivals
88%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
8 min
62 min when late
Rank on route
#1 of 3
route average 85% on time
Key facts
- Delta Air Lines flights on PDX to SEA arrived on time 88% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 2% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 85% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)45%
- Air traffic control & airport congestion33%
- Late-arriving aircraft22%
- Extreme weather0%
- Security0%
Other airlines on PDX to SEA
- SkyWest Airlines86% on time · 9 min avg delay
- Alaska Airlines83% on time · 9 min avg delay
Full PDX to SEA comparison →
Delta Air Lines on-time record across all routes →
281 Delta Air Lines flights tracked on this route; 0 cancelled, 0 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.