SAN to BWI flight delays
San Diego, CA (SAN) Baltimore, MD (BWI) · 2,295 miles
1,142 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
79.41%
Arrived on time
Within 15 minutes of schedule
1.49%
Cancelled
Share of scheduled flights
47 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In September it ran 26.7 points more punctual than in June — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting worse. The later months run 8 points less punctual than the earlier ones. A drift of that size is rarely weather; it is more often an airline adding frequencies faster than the airports can absorb them.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
The San Diego to Baltimore route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on SAN to BWI. Flights ran closest to schedule in September and worst in June.
Every airline on SAN to BWI
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 1,142 | 79.41% | 1.49% | 47 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
BWI to SAN Baltimore back to San Diego 75.4% on time DOther routes from San Diego
Common questions
Are flights from San Diego to Baltimore usually delayed?
79.41% of flights on the SAN to BWI route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from San Diego to Baltimore?
Only Southwest Airlines appears in the published record on this route, with 1,142 flights and 79.41% arriving on time.
How often are SAN to BWI flights cancelled?
1.49% of scheduled flights did not operate — about 15 in every thousand. That is in the normal range.
What is the best month to fly San Diego to Baltimore?
September, when 90.1% of flights arrived on time. The worst was June at 63.4%.
When SAN to BWI flights are late, how late are they?
About 47 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SAN to BWI during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →