Route · SAN → IAD · 2020–2025 BTS data
San Diego to Washington
The SAN–IAD corridor (San Diego, CA → Washington, DC) runs ahead of the national average, served by 3 carriers across roughly 2,253 miles.
Data updated 2026-06-13
- 87.3%
- On-time
- +8.3 pts
- vs US avg
- 76 min
- Delay when late
- 6,415
- Flights
Cancelled
1.4%
Best Month
Oct 2025 95%
Worst Month
Oct 2024 71%
Distance
2,253 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 122 | 12 | 0 | 0 | AS,UA |
| Nov 2025 | 115 | 17 | 0 | 1 | UA,AS |
| Oct 2025 | 119 | 6 | 0 | 0 | AS,UA |
| Sep 2025 | 119 | 6 | 1 | 1 | UA,AS |
| Aug 2025 | 124 | 19 | 1 | 1 | UA,AS |
| Jul 2025 | 122 | 26 | 0 | 2 | AS,UA |
| Jun 2025 | 120 | 25 | 0 | 4 | AS,UA |
| May 2025 | 124 | 23 | 0 | 0 | AS,UA |
| Apr 2025 | 120 | 24 | 2 | 0 | UA,AS |
| Mar 2025 | 124 | 18 | 0 | 1 | AS,UA |
| Feb 2025 | 112 | 13 | 0 | 1 | AS,UA |
| Jan 2025 | 124 | 15 | 1 | 2 | AS,UA |
| Dec 2024 | 124 | 28 | 0 | 0 | AS,UA |
| Nov 2024 | 118 | 11 | 0 | 0 | UA,AS |
| Oct 2024 | 124 | 36 | 0 | 0 | UA,AS |
| Sep 2024 | 119 | 24 | 1 | 0 | UA,AS |
| Aug 2024 | 124 | 27 | 0 | 3 | AS,UA |
| Jul 2024 | 124 | 34 | 2 | 2 | AS,UA |
| Jun 2024 | 120 | 18 | 0 | 0 | AS,UA |
| May 2024 | 146 | 13 | 1 | 0 | AS,UA |
| Apr 2024 | 150 | 23 | 0 | 0 | AS,UA |
| Mar 2024 | 155 | 15 | 0 | 0 | AS,UA |
| Feb 2024 | 143 | 14 | 2 | 2 | AS,UA |
| Jan 2024 | 143 | 13 | 32 | 1 | AS,UA |
Cancellation Rate
1.4%
43 of 3,035 flights
Diversion Rate
0.7%
21 of 3,035 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SAN - San Diego
Full on-time, delay-cause, and seasonal performance for San Diego, CA.
Origin airport →IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Destination airport →Compare the two airports
See SAN and IAD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SAN–IAD.
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What the Data Says About SAN to IAD
San Diego to Washington (SAN to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.3% on-time rate across 6,415 flights, with delays that do happen averaging 76.1 minutes. The corridor runs roughly 2,253 miles and is served by 3 carriers. Over the most recent 24 months, 43 of 3,035 flights were cancelled (1.4%) and 21 diverted (0.7%).
The monthly split is wide on this route: Oct 2025 posted the strongest performance at 95% on-time, while Oct 2024 came in at just 71% - a 24-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.