Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 978 · Washington (DCA) → Las Vegas (LAS)
Sold by Southwest. Still flying: 24 of the last 56 days (Mon, Thu, Fri).
Arrives on time19%within 15 minutes, of 26 flights
Cancelled0.0%of scheduled flights
An hour or more late38%of flights that operated
When late, on average76 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Las Vegas is 3 h behind Washington).
- Leaves DCA
- 16:25
- Arrives LAS
- 18:30
- Flight time
- 5h 05m
- Days flown, last 8 weeks
- 24 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 DCA
All flights leaving Washington (DCA) at 4–5 pm, wherever they’re going: 63% left within 15 minutes and 3.0% were cancelled (7,174 flights in the year). Other Southwest flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.