Southwest AirlinesDepart08:25
Tue, Nov 10BOS → SAN
6h 20m · Direct
$119one way, per person
View deal
- Cheapest fare
- $119
- Cheapest month
- November
- Direct flights
- Yes
- Flight time
- 6h 20m
Southwest Airlines · Tue, Nov 10
from $119
Southwest Airlines
4,150 km
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Cheapest month to fly from Boston to San Diego
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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Where to stay, what to do and getting around, from our travel partners.
About flights from Boston to San Diego
Boston (BOS) and San Diego (SAN) are about 4,150 km apart. Direct flights take around 6h 20m, and recent direct fares were with Southwest Airlines. Over the next few months, one-way fares start from $119, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Boston to San Diego?
The cheapest one-way fare we've seen recently is $119 with Southwest Airlines, departing Tuesday, November 10, 2026.
What is the cheapest month to fly from Boston to San Diego?
November 2026 currently has the lowest fares, from $119 one way.
Are there direct flights from Boston to San Diego?
Yes. Recent direct fares were with Southwest Airlines.
How long is the flight from Boston to San Diego?
A direct flight takes about 6h 20m. Boston and San Diego are around 4,150 km apart.
Which airlines fly from Boston to San Diego?
Recent fares on this route were with Southwest Airlines.
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