Southwest Airlines BOS to BWI on-time performance
Southwest Airlines nonstop flights from Boston to Baltimore · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
2.1%
50 flights
Avg arrival delay
16 min
66 min when late
Rank on route
#2 of 3
route average 79% on time
Key facts
- Southwest Airlines flights on BOS to BWI arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 2.1% were cancelled, and 8% arrived an hour or more late.
- That ranks #2 of 3 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was late-arriving aircraft (65%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft65%
- Airline (crew, maintenance, cleaning, fueling)23%
- Air traffic control & airport congestion9%
- Extreme weather3%
- Security0%
Other airlines on BOS to BWI
- Republic Airways82% on time · 13 min avg delay
- Spirit Airlines70% on time · 20 min avg delay
Full BOS to BWI comparison →
Southwest Airlines on-time record across all routes →
2,374 Southwest Airlines flights tracked on this route; 50 cancelled, 5 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.