Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 431 · Phoenix (PHX) → Ontario (ONT)
Sold by Southwest. Still flying: 24 of the last 56 days (Mon, Thu, Fri).
Arrives on time88%within 15 minutes, of 26 flights
Cancelled0.0%of scheduled flights
An hour or more late0%of flights that operated
When late, on average24 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves PHX
- 10:05
- Arrives ONT
- 11:20
- Flight time
- 1h 15m
- 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 PHX
All flights leaving Phoenix (PHX) at 10–11 am, wherever they’re going: 83% left within 15 minutes and 0.6% were cancelled (15,417 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.