Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 1251 · Dallas (DAL) → Washington (DCA)
Sold by Southwest. Still flying: 16 of the last 56 days (Tue, Wed).
Arrives on time40%within 15 minutes, of 16 flights
Cancelled6.2%of scheduled flights
An hour or more late27%of flights that operated
When late, on average67 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Washington is 1 h ahead of Dallas).
- Leaves DAL
- 16:55
- Arrives DCA
- 20:52
- Flight time
- 2h 58m
- 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 DAL
All flights leaving Dallas (DAL) at 4–5 pm, wherever they’re going: 57% left within 15 minutes and 1.0% were cancelled (4,707 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.