Alaska Airlines SAN to BOS on-time performance
Alaska Airlines nonstop flights from San Diego to Boston · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
1.2%
6 flights
Avg arrival delay
16 min
67 min when late
Rank on route
#3 of 4
route average 77% on time
Key facts
- Alaska Airlines flights on SAN to BOS arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 1.2% were cancelled, and 8% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (47%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion47%
- Late-arriving aircraft27%
- Extreme weather20%
- Airline (crew, maintenance, cleaning, fueling)7%
- Security0%
Other airlines on SAN to BOS
- JetBlue78% on time · 22 min avg delay
- Delta Air Lines80% on time · 19 min avg delay
- Southwest Airlines33% on time · 49 min avg delay
Full SAN to BOS comparison →
Alaska Airlines on-time record across all routes →
508 Alaska Airlines flights tracked on this route; 6 cancelled, 8 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.