Southwest Airlines BOS to SFO on-time performance
Southwest Airlines nonstop flights from Boston to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
100%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
7 min
– when late
Rank on route
#1 of 5
route average 72% on time
Key facts
- Southwest Airlines flights on BOS to SFO arrived on time 100% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 0% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 72% on time overall.
On-time trend by month
Monthly trend appears once two or more months of data are available.
Why this airline's flights were late
No delay causes recorded in this period.
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
- Alaska Airlines60% on time · 29 min avg delay
Full BOS to SFO comparison →
Southwest Airlines on-time record across all routes →
1 Southwest Airlines 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.