Find flights
Deals
When to book
FAQs

Cheap flights from Boston to San Diego from £94

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAN
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

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 6 November 2025.

Round-trip from

£159

One-way from

£94

Popular in

December

Cheapest in

January

Average price

£266
Alaska Airlines
  • Alaska Airlines
  • 6/12-13/12
  • 1 total stop
  • 22h 24m total
  • Boston to San Diego
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 21/1
  • 1 total stop
  • 11h 29m total
  • Boston to San Diego
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 6 November 2025.

Sat 6/1207:05BOS - SAN
1 stop8h 57mDelta
Sat 13/1222:20SAN - BOS
Nonstop5h 30mDelta
Deal found 5/11£159
Thu 11/1217:25BOS - SAN
Nonstop6h 34mDelta
Sat 13/1217:45SAN - BOS
1 stop9h 35mDelta
Deal found 5/11£161
Mon 8/1217:25BOS - SAN
Nonstop6h 34mDelta
Thu 11/1214:19SAN - BOS
1 stop8h 08mDelta
Deal found 5/11£163
Sat 6/1217:05BOS - SAN
1 stop9h 30mDelta
Tue 9/1207:10SAN - BOS
1 stop8h 49mDelta
Deal found 5/11£166
Sat 6/1206:10BOS - SAN
1 stop9h 11mDelta
Mon 8/1219:07SAN - BOS
1 stop8h 13mDelta
Deal found 5/11£169
Fri 5/1217:25BOS - SAN
Nonstop6h 34mDelta
Tue 9/1222:20SAN - BOS
Nonstop5h 30mDelta
Deal found 5/11£170
Mon 8/1205:29BOS - SAN
1 stop7h 57mDelta
Mon 8/1222:00SAN - BOS
1 stop8h 05mDelta
Deal found 5/11£171
Thu 11/1217:25BOS - SAN
Nonstop6h 34mDelta
Sun 14/1222:20SAN - BOS
Nonstop5h 30mDelta
Deal found 5/11£173
Sat 6/1216:24BOS - SAN
Nonstop6h 46mAlaska Airlines
Sat 13/1209:15SAN - BOS
Nonstop5h 37mAlaska Airlines
Deal found 5/11£174
Sat 13/1217:25BOS - SAN
Nonstop6h 34mDelta
Wed 17/1222:20SAN - BOS
Nonstop5h 30mDelta
Deal found 5/11£175
Wed 3/1205:29BOS - SAN
1 stop7h 57mDelta
Fri 5/1222:20SAN - BOS
Nonstop5h 30mDelta
Deal found 5/11£178

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 6 November 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

Wed 4/2

17:10-20:52

Nonstop6h 42m

San Diego

Sat 7/2

22:04-06:30

Nonstop5h 26m

£182

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 4/2

10:25-14:05

Nonstop6h 40m

San Diego

Fri 6/2

21:30-05:54

Nonstop5h 24m

£186

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sun 1/2

16:20-20:00

Nonstop6h 40m

San Diego

Tue 10/2

09:10-17:39

Nonstop5h 29m

£186

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 5/2

17:10-20:52

Nonstop6h 42m

San Diego

Wed 11/2

22:04-06:30

Nonstop5h 26m

£186

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 4/2

16:20-20:00

Nonstop6h 40m

San Diego

Fri 6/2

09:10-17:39

Nonstop5h 29m

£186

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 3/2

07:00-15:29

1 stop11h 29m

San Diego

Wed 11/2

09:37-23:54

1 stop11h 17m

£189

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 17/2

07:00-10:32

Nonstop6h 32m

San Diego

Wed 25/2

11:42-20:21

Nonstop5h 39m

£189

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sun 7/12

17:25-20:59

Nonstop6h 34m

San Diego

Mon 8/12

22:20-06:50

Nonstop5h 30m

£189

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sun 7/12

16:24-20:10

Nonstop6h 46m

San Diego

Thu 11/12

09:15-17:52

Nonstop5h 37m

£189

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 6/2

16:20-20:00

Nonstop6h 40m

San Diego

Sat 14/2

09:15-18:09

Nonstop5h 54m

£193

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 24 results
1
2
3

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 31 October 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 £87). Flying from Boston to San Diego in July is currently the most expensive (average of £151). 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 6 November 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 6h 42m. The distance between Boston and San Diego is about 2581 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for Alaska Airlines. According to our data, you can fly for as low as £95. Users have also found prices from £95 and £95 on Delta and United Airlines, 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: TAP AIR PORTUGAL (97%), Etihad Airways (89%), JetBlue (88%).

  • 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 £87). Flying from Boston to San Diego in July is currently the most expensive (average of £151). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Los Angeles flights
Boston to Las Vegas flights
Boston to San Francisco flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.