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Cheap flights from Boston to San Diego

Recently found return fares from $130, with January the cheapest month we know of. Compare dates, then book with the partner you choose.

Cheapest months to fly

Lowest recently found return fare in each month. Tap a month to see that month's calendar.

$184 Nov2026 $130 Jan2027

Boston → San Diego

November 2026

Mon Tue Wed Thu Fri Sat Sun 1 2 3 4 $193 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 $184 21 22 23 24 25 26 27 28 29 30
LowerHigherLowest this month

Lowest fares for the best day

  • JetBlueFri 20 Nov – Sun 22 Nov · Direct · 6h 30m $278
  • Alaska AirlinesWed 4 Nov – Fri 6 Nov · Direct · 6h 31m $294
  • Alaska AirlinesThu 12 Nov – Sun 15 Nov · Direct · 6h 31m $324
See all flights for these dates

Airport in San Diego

  • SANSan Diego International

Airport in Boston

  • BOSLogan

Watch this route

BOS
SAN

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More trips from Boston

All flights from Boston San Diego to Boston flights
Atlantafrom $145 Orlandofrom $166 Washingtonfrom $181 Miamifrom $197 Chicagofrom $204 RDUfrom $250 New Yorkfrom $265 SJUfrom $285

FAQ

Questions about this route

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Help center Contact us
01What is the cheapest month to fly from Boston to San Diego?

Based on recently found fares, January 2027 has the lowest price we know of, from $130. Prices change often, so check the calendar for current fares.

02Are the prices on this page final?

No. They are recently found fares. When you open a deal, the partner shows the live price, including taxes and fees, before you pay.

03How can I get an alert when flights to San Diego get cheaper?

Use the price alert on this page. Choose your dates or a whole month and we will email you when the fare drops.