Route · SAN → BOS · 2020–2025 BTS data
San Diego to Boston
The SAN–BOS corridor (San Diego, CA → Boston, MA) runs behind the national average, served by 8 carriers across roughly 2,588 miles.
Data updated 2026-06-13
- 78%
- On-time
- -1 pts
- vs US avg
- 75 min
- Delay when late
- 7,391
- Flights
Cancelled
0.7%
Best Month
Apr 2025 88%
Worst Month
Jul 2024 63%
Distance
2,588 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 134 | 31 | 3 | 2 | DL,AS,B6 |
| Nov 2025 | 137 | 29 | 1 | 1 | AS,B6,DL |
| Oct 2025 | 163 | 39 | 2 | 0 | AS,B6,DL |
| Sep 2025 | 135 | 36 | 2 | 1 | DL,AS,B6 |
| Aug 2025 | 175 | 27 | 1 | 0 | AS,B6,DL |
| Jul 2025 | 181 | 52 | 3 | 1 | AS,B6,DL |
| Jun 2025 | 172 | 38 | 0 | 1 | AS,B6,DL |
| May 2025 | 165 | 37 | 0 | 0 | AS,B6,DL |
| Apr 2025 | 117 | 14 | 0 | 0 | DL,AS,B6 |
| Mar 2025 | 121 | 33 | 2 | 1 | AS,B6,DL |
| Feb 2025 | 104 | 28 | 2 | 2 | AS,B6,DL |
| Jan 2025 | 117 | 15 | 1 | 0 | AS,B6,DL |
| Dec 2024 | 122 | 44 | 3 | 0 | AS,B6,DL |
| Nov 2024 | 112 | 15 | 0 | 0 | B6,AS,DL |
| Oct 2024 | 140 | 37 | 0 | 0 | AS,DL,B6 |
| Sep 2024 | 116 | 31 | 0 | 0 | AS,B6,DL |
| Aug 2024 | 142 | 50 | 0 | 0 | AS,B6,DL |
| Jul 2024 | 155 | 57 | 2 | 0 | AS,B6,DL |
| Jun 2024 | 149 | 42 | 0 | 0 | AS,B6,DL |
| May 2024 | 158 | 27 | 0 | 1 | AS,B6,DL |
| Apr 2024 | 116 | 19 | 0 | 0 | AS,B6,DL |
| Mar 2024 | 117 | 19 | 0 | 0 | AS,B6,DL |
| Feb 2024 | 95 | 16 | 0 | 0 | AS,B6,DL |
| Jan 2024 | 88 | 20 | 1 | 0 | AS,B6,DL |
Cancellation Rate
0.7%
23 of 3,231 flights
Diversion Rate
0.3%
10 of 3,231 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 →BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Destination airport →Compare the two airports
See SAN and BOS 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–BOS.
Routes with a similar on-time rate
What the Data Says About SAN to BOS
The San Diego to Boston corridor (SAN to BOS) posts a 78% on-time rate on the lower edge of the average band, based on 7,391 tracked flights. Late flights run 75.4 minutes behind on average. 8 carriers cover the 2,588-mile route; over the last 24 months, 23 of 3,231 flights were cancelled (0.7%) and 0.3% diverted.
The monthly split is wide on this route: Apr 2025 posted the strongest performance at 88% on-time, while Jul 2024 came in at just 63% - a 25-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.