Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 4138 · Las Vegas (LAS) → Phoenix (PHX)
Sold by Southwest. Still flying: 48 of the last 56 days (Mon, Tue, Wed, Thu, Fri, Sun).
Arrives on time67%within 15 minutes, of 50 flights
Cancelled2.0%of scheduled flights
An hour or more late4%of flights that operated
When late, on average44 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves LAS
- 13:50
- Arrives PHX
- 15:10
- Flight time
- 1h 20m
- Days flown, last 8 weeks
- 48 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 LAS
All flights leaving Las Vegas (LAS) at 1–2 pm, wherever they’re going: 74% left within 15 minutes and 0.8% were cancelled (10,033 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.