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Find cheap one-way flights from Boston to San Diego starting at US$103.

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from Boston to San Diego?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Cheapest airlines flights from Boston to San Diego

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Spirit Airlines
From US$103
American Airlines
From US$103
Alaska Airlines
From US$107
Frontier Airlines
From US$111
Sun Country Airlines
From US$111
Delta Air Lines
From US$114
Jetblue Airways
From US$128
Southwest Airlines
From US$134
United Airlines
From US$145
Southern Airways Express
From US$569
ANA airlines

Find more flights and airlines

Find cheap flights from Boston to San Diego by different airports

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Boston to San Diego.

  • Cheapest
    Spirit Airlines
    BOS
    13:42
    21h 3m
    1 transfer
    SAN
    07:45
    General Edward Lawrence Logan International Airport - San Diego International Airport
    Mon, Apr 29Spirit Airlines
    US$103
  • Southern Airways Express
    BNH
    09:20
    16h 37m
    1 transfer
    SAN
    22:57
    Hartford Barnes Airport - San Diego International Airport
    Sun, Apr 14Southern Airways Express
    US$569
  • Southern Airways Express
    BNH
    09:20
    16h 37m
    1 transfer
    SAN
    22:57
    Hartford Barnes Airport - San Diego International Airport
    Sun, Apr 14Southern Airways Express
    US$569
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Boston (BOS) to San Diego (SAN) the cheapest?

    Airlines adjust prices for flights from Boston to San Diego based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Boston (BOS) to San Diego (SAN) cost?

    According to Trip.com's data, the lowest price is around $468.
  • How long does it take to fly from Boston (BOS) to San Diego (SAN) and what is the distance?

    It takes around 6 hours 28 minutes to fly from Boston (BOS) to San Diego (SAN).
  • What is the transportation method from the main airport to downtown in San Diego?

    • The distance from San Diego International Airport to downtown is about 3km. It takes about 20 minutes by taxi.
  • What are the most popular airlines that fly from Boston (BOS) to San Diego (SAN)?

Boston to San Diego Flight Information

Cheapest nonstop flight price

$103

Cheapest round-trip ticket price

$219

Off-season for travel

December

Peak season for travel

September