Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 2521 · Phoenix (PHX) → Chicago (MDW)
Sold by Southwest. Still flying: 47 of the last 56 days (Mon–Sat).
Arrives on time8%within 15 minutes, of 49 flights
Cancelled2.0%of scheduled flights
An hour or more late40%of flights that operated
When late, on average71 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Chicago is 2 h ahead of Phoenix).
- Leaves PHX
- 19:15
- Arrives MDW
- 00:35
- Flight time
- 3h 20m
- Days flown, last 8 weeks
- 47 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 7–8 pm, wherever they’re going: 68% left within 15 minutes and 1.0% were cancelled (9,753 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.