Route
IAD → LAX
Washington Dulles International Airport Los Angeles International Airport
How punctual is this route?
- On-time arrivals
- 84.1%
- Less than 15 minutes late
- Cancelled
- 0.7%
- Of scheduled flights
- Average delay when late
- 66 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,460
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 33%
- Airline (crew, maintenance, cleaning) 32%
- Air traffic control & airport 26%
- Extreme weather 9%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.2% | 174 |
| October 2025 | 89.6% | 202 |
| November 2025 | 87.2% | 198 |
| December 2025 | 85.9% | 215 |
| January 2026 | 77.0% | 174 |
| February 2026 | 79.1% | 158 |
| March 2026 | 84.8% | 184 |
| April 2026 | 80.2% | 224 |
| May 2026 | 87.6% | 252 |
| June 2026 | 81.2% | 253 |
| July 2026 | 81.8% | 242 |
| August 2026 | 84.2% | 184 |
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 | 2,340 | 84.6% | 0.8% | 66 min |
| American Airlines | 120 | 75.0% | 0.0% | 59 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA1689
10% late · 365 flights
-
UA2276
30% late · 341 flights
-
UA1385
16% late · 324 flights
-
UA1734
14% late · 203 flights
-
UA2294
17% late · 151 flights
-
UA684
13% late · 134 flights
-
UA1868
16% late · 82 flights
-
UA325
9% late · 81 flights
-
UA413
24% late · 59 flights
-
UA1470
15% late · 52 flights
-
UA1027
20% late · 45 flights
-
UA754
4% late · 45 flights
-
AA436
28% late · 43 flights
-
AA1242
29% late · 42 flights
-
UA1366
3% late · 37 flights
-
UA2302
14% late · 37 flights
-
AA1225
18% late · 34 flights
-
UA797
26% late · 32 flights
-
UA1990
10% late · 31 flights
-
UA2655
3% late · 31 flights
-
UA2125
14% late · 28 flights
-
UA1855
4% late · 24 flights
-
UA2065
17% late · 24 flights
-
UA346
9% late · 23 flights
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Headlines found by Google News; stories open on the publisher's site.
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