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Cheap flights from Boston to San Diego from £88

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAN
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Boston to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 September 2025.

Round-trip from

£140

One-way from

£88

Popular in

December

Cheapest in

January

Average price

£259
Southwest
  • Southwest
  • 3/12-6/12
  • 2 total stops
  • 17h 45m total
  • Boston to San Diego
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Hawaiian Airlines
  • Hawaiian Airlines
  • 11/12
  • Nonstop
  • 6h 46m total
  • Boston to San Diego
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Highest demand for flights based on searches. 0% potential increase in price (£1 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Boston to San Diego

Cheapest flights from Boston to San Diego
Explore the most affordable flight options available from Boston to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Wed 3/1214:10BOS - SAN
1 stop10h 25mSouthwest
Sat 6/1221:45SAN - BOS
1 stop7h 20mSouthwest
Deal found 9/9£140
Sat 25/1005:05BOS - SAN
1 stop8h 30mSouthwest
Tue 4/1121:45SAN - BOS
1 stop8h 55mSouthwest
Deal found 10/9£141
Sat 1/1105:20BOS - SAN
1 stop8h 30mSouthwest
Sat 8/1121:45SAN - BOS
1 stop9h 00mSouthwest
Deal found 11/9£142
Wed 12/1114:10BOS - SAN
1 stop10h 25mSouthwest
Mon 17/1106:50SAN - BOS
1 stop9h 20mSouthwest
Deal found 10/9£143
Sat 4/1005:05BOS - SAN
1 stop8h 30mSouthwest
Wed 8/1018:25SAN - BOS
1 stop11h 55mSouthwest
Deal found 11/9£145
Wed 22/1017:05BOS - SAN
1 stop8h 05mSouthwest
Wed 29/1019:30SAN - BOS
2 stops9h 45mSouthwest
Deal found 10/9£148
Wed 3/1214:10BOS - SAN
1 stop10h 25mSouthwest
Mon 8/1221:45SAN - BOS
1 stop8h 55mSouthwest
Deal found 10/9£149
Thu 23/1015:50BOS - SAN
1 stop9h 40mSouthwest
Tue 28/1021:10SAN - BOS
1 stop8h 15mSouthwest
Deal found 10/9£151
Wed 29/1005:15BOS - SAN
2 stops11h 45mSouthwest
Wed 5/1120:05SAN - BOS
2 stops9h 00mSouthwest
Deal found 10/9£153
Tue 2/1214:10BOS - SAN
1 stop10h 25mSouthwest
Sat 6/1219:40SAN - BOS
2 stops9h 25mSouthwest
Deal found 10/9£154

Cheapflights Fare Finder

 
Customise your flight search to find flights from Boston to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 September 2025.
Use the filters below to find and compare flights from Boston to San Diego that are best for you.

Fly from

Boston

Fly to

San Diego

Route

Depart

Return

Price

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 1/11

05:20-10:50

1 stop8h 30m

San Diego

Sat 8/11

21:45-09:45

1 stop9h 00m

£142

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 4/10

05:05-10:35

1 stop8h 30m

San Diego

Wed 8/10

18:25-09:20

1 stop11h 55m

£145

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 4/12

12:20-21:35

1 stop12h 15m

San Diego

Tue 9/12

10:30-22:45

2 stops9h 15m

£146

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 4/11

14:10-21:35

1 stop10h 25m

San Diego

Fri 7/11

14:05-00:05

1 stop7h 00m

£153

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 5/12

18:00-23:25

1 stop8h 25m

San Diego

Wed 10/12

12:00-22:15

1 stop7h 15m

£159

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 8/11

07:45-17:55

2 stops13h 10m

San Diego

Tue 11/11

21:45-08:15

1 stop7h 30m

£165

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 5/12

07:00-16:57

1 stop12h 57m

San Diego

Wed 10/12

09:15-17:52

Nonstop5h 37m

£175

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 14/11

06:50-14:05

2 stops10h 15m

San Diego

Wed 19/11

10:30-22:45

2 stops9h 15m

£182

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 1/11

15:45-19:16

Nonstop6h 31m

San Diego

Tue 4/11

20:39-05:10

Nonstop5h 31m

£182

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 13/11

16:24-20:03

Nonstop6h 39m

San Diego

Tue 18/11

09:15-17:55

Nonstop5h 40m

£182

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 22 results
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Best time to book a flight from Boston to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to San Diego

How far ahead should I book a flight from Boston to San Diego?

Use this chart to determine the optimal time to book a return flight from Boston to San Diego. Price data was last updated on 29 August 2025.

To ensure you get the cheapest price possible for a flight from Boston to San Diego, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boston to San Diego?

Currently, January is the cheapest month in which you can book a flight from Boston to San Diego (average of £585). Flying from Boston to San Diego in July is currently the most expensive (average of £920). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SAN?

Find hourly flight availability from Boston to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to San Diego as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Boston to San Diego flight route?

    Flights from Boston Logan Intl to San Diego have been viewed 1 times in the past calendar month.

  • How long is the flight from Boston to San Diego?

    Departing from Boston to San Diego will take you 8h 30m. The distance between Boston and San Diego is about 2581 mi.

  • What are the cheapest airlines to fly from Boston to San Diego one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as £90. Users have also found prices from £92 and £92 on Hawaiian Airlines and Delta, respectively.

  • What are the most reliable airlines from Boston to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Diego on time: Etihad Airways (97%), JetBlue (91%), Icelandair (91%).

  • Can I find deals for flights from Boston to San Diego that include hotel bookings?

    Yes. In addition to deals on Boston to San Diego flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Diego.

  • Can I find deals for business class flights from Boston to San Diego?

    Yes. Cheapflights offers flight deals from Boston to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to San Diego?

    Currently, January is the cheapest month in which you can book a flight from Boston to San Diego (average of £585). Flying from Boston to San Diego in July is currently the most expensive (average of £920). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
El Cajon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boston to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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How does Cheapflights help users find flights from Boston to San Diego?

When you search for this flight from Boston to San Diego, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Boston to San Diego?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Diego from Boston.

Can Cheapflights find flights from Boston to San Diego with no change fees?

Yes, we can. To see specific flights from Boston to San Diego with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Boston to San Diego become cheaper?

Not ready to book yet? You can track prices for flights from Boston to San Diego on Cheapflights with our Price Alert feature and get notified when better prices are available.

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