BWI to SAN flight delays
Baltimore, MD (BWI) San Diego, CA (SAN) · 2,295 miles
1,141 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
75.4%
Arrived on time
Within 15 minutes of schedule
1.4%
Cancelled
Share of scheduled flights
51 min
When late, late by
Average across delayed arrivals
14 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In November it ran 36.5 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.
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.
Flights from Baltimore to San Diego run late more often than the average route, though not severely.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on BWI to SAN. Flights ran closest to schedule in November and worst in June.
Every airline on BWI to SAN
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 | 1,141 | 75.4% | 1.4% | 51 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SAN to BWI San Diego back to Baltimore 79.41% on time CCommon questions
Are flights from Baltimore to San Diego usually delayed?
75.4% of flights on the BWI to SAN 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 Baltimore to San Diego?
Only Southwest Airlines appears in the published record on this route, with 1,141 flights and 75.4% arriving on time.
How often are BWI to SAN flights cancelled?
1.4% of scheduled flights did not operate — about 14 in every thousand. That is in the normal range.
What is the best month to fly Baltimore to San Diego?
November, when 87.5% of flights arrived on time. The worst was June at 51%.
When BWI to SAN flights are late, how late are they?
About 51 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 BWI to SAN 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 →