Route
IAD → PHX
Washington Dulles International Airport Phoenix Sky Harbor International Airport
How punctual is this route?
- On-time arrivals
- 81.2%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 63 min
- Flights arriving 15+ minutes late
- Flights tracked
- 979
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 38%
- Late-arriving aircraft 37%
- Airline (crew, maintenance, cleaning) 23%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.6% | 87 |
| October 2025 | 75.3% | 97 |
| November 2025 | 74.8% | 109 |
| December 2025 | 82.4% | 108 |
| January 2026 | 89.4% | 98 |
| February 2026 | 84.0% | 81 |
| March 2026 | 83.6% | 117 |
| April 2026 | 89.0% | 91 |
| May 2026 | 84.4% | 96 |
| June 2026 | 72.7% | 33 |
| July 2026 | 79.3% | 31 |
| August 2026 | 71.0% | 31 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 704 | 85.2% | 0.9% | 72 min |
| Southwest Airlines | 275 | 71.0% | 0.7% | 51 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1938
21% late · 361 flights
-
UA642
13% late · 130 flights
-
UA267
5% late · 79 flights
-
UA709
1% late · 71 flights
-
WN2836
24% late · 58 flights
-
WN1010
11% late · 47 flights
-
WN2678
32% late · 45 flights
-
UA453
12% late · 42 flights
-
WN3756
30% late · 33 flights
-
WN3044
40% late · 31 flights
-
WN3101
52% late · 31 flights
-
UA1184
10% late · 21 flights
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