Route · IAD → LAX · 2020–2025 BTS data
Washington to Los Angeles
The IAD–LAX corridor (Washington, DC → Los Angeles, CA) runs ahead of the national average, served by 6 carriers across roughly 2,288 miles.
Data updated 2026-06-13
- 82.9%
- On-time
- +3.9 pts
- vs US avg
- 70 min
- Delay when late
- 12,535
- Flights
Cancelled
1.0%
Best Month
Sep 2024 93%
Worst Month
Jul 2025 61%
Distance
2,288 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 215 | 30 | 2 | 0 | UA |
| Nov 2025 | 198 | 25 | 1 | 1 | UA |
| Oct 2025 | 202 | 21 | 1 | 0 | UA |
| Sep 2025 | 174 | 17 | 1 | 0 | UA |
| Aug 2025 | 196 | 41 | 1 | 0 | UA,AS |
| Jul 2025 | 224 | 88 | 4 | 0 | AS,UA |
| Jun 2025 | 226 | 77 | 0 | 0 | AS,UA |
| May 2025 | 254 | 47 | 0 | 0 | AS,UA |
| Apr 2025 | 242 | 25 | 0 | 0 | UA,AS |
| Mar 2025 | 205 | 21 | 0 | 0 | AS,UA |
| Feb 2025 | 144 | 29 | 2 | 0 | UA |
| Jan 2025 | 160 | 39 | 2 | 0 | AS,UA |
| Dec 2024 | 230 | 45 | 0 | 2 | AS,UA |
| Nov 2024 | 229 | 25 | 2 | 0 | UA,AS |
| Oct 2024 | 240 | 23 | 0 | 0 | UA,AS |
| Sep 2024 | 215 | 14 | 0 | 3 | UA,AS |
| Aug 2024 | 236 | 42 | 3 | 0 | AS,UA |
| Jul 2024 | 248 | 45 | 3 | 0 | AS,UA |
| Jun 2024 | 236 | 39 | 3 | 0 | AS,UA |
| May 2024 | 242 | 62 | 0 | 2 | AS,UA |
| Apr 2024 | 232 | 53 | 0 | 0 | AS,UA |
| Mar 2024 | 214 | 45 | 1 | 0 | AS,UA |
| Feb 2024 | 146 | 27 | 1 | 0 | AS,UA |
| Jan 2024 | 145 | 26 | 23 | 0 | AS,UA |
Cancellation Rate
1.0%
50 of 5,053 flights
Diversion Rate
0.2%
8 of 5,053 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Origin airport →LAX - Los Angeles
Full on-time, delay-cause, and seasonal performance for Los Angeles, CA.
Destination airport →Compare the two airports
See IAD and LAX side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–LAX.
Routes with a similar on-time rate
What the Data Says About IAD to LAX
Bureau of Transportation Statistics records show Washington to Los Angeles (IAD to LAX) running a 82.9% on-time rate over 12,535 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 70.2 minutes. The 2,288-mile corridor is served by 6 carriers, and over the last 24 months 1.0% of 5,053 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Sep 2024 posted the strongest performance at 93% on-time, while Jul 2025 came in at just 61% - a 33-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.