Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 4015 · Dulles (IAD) → Philadelphia (PHL)
Sold by United, flown by Mesa. Still flying: 47 of the last 56 days (Mon, Tue, Wed, Thu, Fri, Sun).
Arrives on time84%within 15 minutes, of 58 flights
Cancelled3.4%of scheduled flights
An hour or more late2%of flights that operated
When late, on average37 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves IAD
- 08:35
- Arrives PHL
- 09:45
- Flight time
- 1h 10m
- 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 IAD
All flights leaving Dulles (IAD) at 8–9 am, wherever they’re going: 90% left within 15 minutes and 1.1% were cancelled (16,925 flights in the year). Other United flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.