Route
IAD → PWM
Washington Dulles International Airport Portland International Jetport
How punctual is this route?
- On-time arrivals
- 87.2%
- Less than 15 minutes late
- Cancelled
- 2.3%
- Of scheduled flights
- Average delay when late
- 81 min
- Flights arriving 15+ minutes late
- Flights tracked
- 794
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 40%
- Late-arriving aircraft 31%
- Air traffic control & airport 17%
- Extreme weather 12%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 92.5% | 94 |
| October 2025 | 89.0% | 100 |
| November 2025 | 90.7% | 55 |
| December 2025 | 71.9% | 32 |
| January 2026 | 83.9% | 32 |
| February 2026 | 92.6% | 28 |
| March 2026 | 75.0% | 4 |
| April 2026 | 100.0% | 4 |
| May 2026 | 92.9% | 114 |
| June 2026 | 88.7% | 107 |
| July 2026 | 80.2% | 109 |
| August 2026 | 82.9% | 115 |
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 |
|---|---|---|---|---|
| Republic Airways | 711 | 89.0% | 2.5% | 84 min |
| United Airlines | 83 | 72.3% | 0.0% | 70 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
YX3548
6% late · 97 flights
-
UA2064
29% late · 80 flights
-
YX3491
5% late · 75 flights
-
YX3535
8% late · 70 flights
-
YX3529
9% late · 55 flights
-
YX3517
13% late · 54 flights
-
YX3635
10% late · 53 flights
-
YX3712
20% late · 51 flights
-
YX3651
10% late · 47 flights
-
YX3459
24% late · 39 flights
-
YX3619
20% late · 35 flights
-
YX3611
10% late · 31 flights
-
YX3556
10% late · 21 flights
-
YX3709
5% late · 21 flights
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