Alaska Airlines BOS to SFO on-time performance
Alaska Airlines nonstop flights from Boston to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
60%
arrived < 15 min late
Cancelled
0.6%
1 flights
Avg arrival delay
29 min
69 min when late
Rank on route
#5 of 5
route average 72% on time
Key facts
- Alaska Airlines flights on BOS to SFO arrived on time 60% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 16% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 72% on time overall.
- The largest source of delay minutes was late-arriving aircraft (67%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft67%
- Air traffic control & airport congestion16%
- Airline (crew, maintenance, cleaning, fueling)15%
- Extreme weather1%
- Security0%
Other airlines on BOS to SFO
- United Airlines75% on time · 18 min avg delay
- JetBlue69% on time · 22 min avg delay
- Delta Air Lines71% on time · 20 min avg delay
- Southwest Airlines100% on time · 7 min avg delay
Full BOS to SFO comparison →
Alaska Airlines on-time record across all routes →
173 Alaska Airlines flights tracked on this route; 1 cancelled, 4 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.