Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 3946 · Baltimore (BWI) → Buffalo (BUF)
Sold by Southwest. Still flying: 16 of the last 56 days (Tue, Wed).
Arrives on time50%within 15 minutes, of 16 flights
Cancelled12.5%of scheduled flights
An hour or more late21%of flights that operated
When late, on average54 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves BWI
- 21:25
- Arrives BUF
- 22:42
- Flight time
- 1h 18m
- Days flown, last 8 weeks
- 16 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at BWI
All flights leaving Baltimore (BWI) at 9–10 pm, wherever they’re going: 58% left within 15 minutes and 2.7% were cancelled (4,211 flights in the year). Other Southwest flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.