Delta Air Lines SAN to SEA on-time performance
Delta Air Lines nonstop flights from San Diego to Seattle · Aug 2025 – Jul 2026
On-time arrivals
87%
arrived < 15 min late
Cancelled
1.1%
19 flights
Avg arrival delay
10 min
75 min when late
Rank on route
#1 of 4
route average 81% on time
Key facts
- Delta Air Lines flights on SAN to SEA arrived on time 87% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was late-arriving aircraft (55%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft55%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion15%
- Extreme weather0%
- Security0%
Other airlines on SAN to SEA
- Alaska Airlines78% on time · 15 min avg delay
- Southwest Airlines59% on time · 22 min avg delay
- SkyWest Airlines0% on time · 28 min avg delay
Full SAN to SEA comparison →
Delta Air Lines on-time record across all routes →
1,704 Delta Air Lines flights tracked on this route; 19 cancelled, 2 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.