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Cheap flights from Boston to San Diego from £107

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 28/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAN
26 Jun — 3 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to San Diego

Enter your travel dates to find the best prices.

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 27 May 2026.

Wed 26/806:00
BOS
-
SAN
1 stop8h 15m
United Airlines
Tue 1/914:15
SAN
-
BOS
1 stop7h 59m
United Airlines
Deal found 26/5£180
Fri 21/811:50
BOS
-
SAN
1 stop8h 36m
United Airlines
Mon 24/822:40
SAN
-
BOS
1 stop7h 56m
United Airlines
Deal found 25/5£183
Wed 10/618:26
BOS
-
SAN
1 stop8h 28m
United Airlines
Sun 21/622:40
SAN
-
BOS
1 stop7h 49m
United Airlines
Deal found 26/5£187
Fri 5/605:45
BOS
-
SAN
1 stop7h 53m
United Airlines
Wed 10/622:30
SAN
-
BOS
1 stop8h 23m
United Airlines
Deal found 22/5£191
Thu 27/817:10
BOS
-
SAN
Nonstop6h 15m
Delta
Wed 2/922:00
SAN
-
BOS
Nonstop5h 41m
Delta
Deal found 22/5£197
Sat 4/709:30
BOS
-
SAN
Nonstop6h 06m
JetBlue
Sat 11/720:40
SAN
-
BOS
Nonstop5h 39m
JetBlue
Deal found 26/5£198
Sat 4/710:49
BOS
-
SAN
1 stop10h 33m
American Airlines
Sat 11/722:45
SAN
-
BOS
1 stop7h 49m
American Airlines
Deal found 24/5£199
Tue 11/805:35
BOS
-
SAN
1 stop7h 35m
Southwest
Sat 15/815:55
SAN
-
BOS
Nonstop5h 30m
Southwest
Deal found 25/5£206
Fri 21/817:20
BOS
-
SAN
Nonstop6h 15m
Delta
Wed 2/922:02
SAN
-
BOS
Nonstop5h 38m
Delta
Deal found 25/5£209
Thu 11/617:10
BOS
-
SAN
Nonstop6h 16m
Delta
Tue 16/621:54
SAN
-
BOS
Nonstop5h 36m
Delta
Deal found 22/5£210
Tue 11/817:10
BOS
-
SAN
Nonstop6h 15m
Delta
Tue 18/822:02
SAN
-
BOS
Nonstop5h 38m
Delta
Deal found 22/5£212

Find 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 27 May 2026.

Round-trip from

£180

One-way from

£107

Popular in

December

Cheapest in

January

Average price

£261

Good one-way deal

£147 or less
United Airlines
  • United Airlines
  • 17/11-3/12
  • 2 total stops
  • 16h 27m total
  • Boston to San Diego
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Southwest
  • Southwest
  • 28/7
  • 1 total stop
  • 7h 50m total
  • Boston to San Diego
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£5 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 May 2026
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Price to beat on a one-way flight from Boston Logan Intl to San Diego.
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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 27 May 2026.
Use the filters below to find and compare flights from Boston to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 4/7

09:00-12:10

Nonstop6h 10m

San Diego

Sat 11/7

22:00-06:38

Nonstop5h 38m

£198
Fastest return journey

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 4/7

09:30-12:36

Nonstop6h 06m

San Diego

Sat 11/7

20:40-05:19

Nonstop5h 39m

£198

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 22/10

05:45-11:17

1 stop8h 32m

San Diego

Sun 25/10

22:30-09:24

1 stop7h 54m

£218

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 21/8

17:20-20:35

Nonstop6h 15m

San Diego

Sun 23/8

22:02-06:40

Nonstop5h 38m

£221

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 26/8

14:45-22:00

2 stops10h 15m

San Diego

Mon 31/8

06:35-17:50

1 stop8h 15m

£228

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 15/7

18:26-23:54

1 stop8h 28m

San Diego

Sun 19/7

22:25-09:29

1 stop8h 04m

£228

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 9/6

07:20-15:00

1 stop10h 40m

San Diego

Sat 13/6

20:52-05:40

Nonstop5h 48m

£237

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 17/9

11:40-17:26

1 stop8h 46m

San Diego

Sun 20/9

22:40-09:33

1 stop7h 53m

£238

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 10/9

17:00-22:00

1 stop8h 00m

San Diego

Sun 13/9

21:30-06:00

Nonstop5h 30m

£240

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 14/7

05:25-14:15

2 stops11h 50m

San Diego

Tue 21/7

22:40-12:15

1 stop10h 35m

£244

Flights are sorted by cheapest return flights first.

Deals found on 26/5

Showing 1-10 of 24 resultsSorted by cheapest first
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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?

To ensure you get the cheapest price possible for a flight from Boston to San Diego, you should look to book at least 36 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 £244). Flying from Boston to San Diego in December is currently the most expensive (average of £347). 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 27 May 2026.

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.

How much does it cost for a return flight from Boston to San Diego?

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 6h 06m. The distance between Boston and San Diego is about 2581 mi. This flight may include one or multiple stops.

  • 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: Icelandair (98%), TAP AIR PORTUGAL (98%), Etihad Airways (95%).

  • What are the cheapest flights from Boston to San Diego?

    While on average a flight from Boston to San Diego is generally £147, our data shows the cheapest flight currently is £114. When looking at the most popular route, (Boston Logan Intl - San Diego), you can expect to pay £324 for that flight.

  • 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 £244). Flying from Boston to San Diego in December is currently the most expensive (average of £347). 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

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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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