Direct flights from Boston to San Diego BOS → SAN
Alaska Airlines, Delta Air Lines, JetBlue Airways and Southwest Airlines fly nonstop from Boston (BOS) to San Diego (SAN), several times daily. The flight takes about 5h 50m and covers 2,582 miles (4,156 km). Round-trip fares typically run around $328. Arrivals run on time 75.4% at BOS and 75.8% at SAN — BTS data for the last three months, counting arrivals within 15 minutes of schedule. Fares last checked 23 August 2026.
60-day flexibility overview based on 107 recent fares across the next 60 days
What flexibility is worth here
Flying in November rather than December typically saves $186 on BOS → SAN.
Typical round-trip fare by departure month, across the 5 months we currently track.
How long you stay changes it too
Staying 10–16 nights typically costs $60 less than 6–9 nights.
Most people pick dates first and see the price second. We watch every date combination on this route and tell you when a good one gets cheap. Watch BOS → SAN →
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Alaska Airlines
AS
JetBlue Airways
B6
Delta Air Lines
DL
Southwest Airlines
WN
Departure Schedule typical week
Typical weekly schedule · 56 flights per week (~8 per day) · Updated 86d ago
Alaska Airlines
JetBlue Airways
Delta Air Lines
Southwest Airlines
Frequently asked questions
Is there a direct flight from Boston to San Diego?
Yes, Alaska Airlines, Delta Air Lines and 2 more airlines operate nonstop flights from Boston (BOS) to San Diego (SAN).
Which airlines fly direct from Boston to San Diego?
Alaska Airlines, Delta Air Lines, JetBlue Airways, Southwest Airlines operate nonstop flights from Boston to San Diego.
How long is the flight from Boston to San Diego?
The nonstop flight from Boston to San Diego takes ~5h 50m (approximately 4156 km).
How often do direct flights operate from Boston to San Diego?
Nonstop flights from Boston to San Diego operate multiple daily — 56 flights per week (~8 per day).
What is the on-time performance for flights from Boston to San Diego?
Arrivals run on time 75.4% at BOS and 75.8% at SAN — BTS data for the last three months, counting arrivals within 15 minutes of schedule.
What days of the week are there direct flights from Boston to San Diego?
Direct flights from Boston to San Diego operate every day of the week. Alaska Airlines flies daily, JetBlue Airways flies daily, Delta Air Lines flies daily, and Southwest Airlines flies Thursday.
How much is a round-trip flight from Boston to San Diego?
Round-trip flights from Boston (BOS) to San Diego (SAN) start at $237, with a typical fare around $328. Based on 107 recent fare combinations.
What is the cheapest month to fly from Boston to San Diego?
Across the 5 departure months we currently track, November 2026 is the cheapest month to fly round trip from Boston to San Diego, with typical fares around $257 — versus about $443 in December 2026, the most expensive.
Does trip length change the round-trip fare from Boston to San Diego?
Typical round-trip fares from Boston (BOS) to San Diego (SAN) by trip length: a week away (6–9 nights) about $332, around two weeks (10–16 nights) about $272, and a longer stay (17+ nights) about $315. Medians from 107 recent fare combinations.
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