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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
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 29 August 2025.
Round-trip from | £175 |
---|---|
One-way from | £88 |
Popular in | December |
Cheapest in | January |
Average price | £273 |
Find flight deals from Boston to San Diego
Cheapest flights from Boston to San DiegoExplore 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 29 August 2025.
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 29 August 2025.
Cheapflights Fare Finder
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
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Wed 22/10
17:25-20:44
Nonstop6h 19m
San Diego
Sat 25/10
22:15-06:53
Nonstop5h 38m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Wed 22/10
07:20-10:49
Nonstop6h 29m
San Diego
Sat 1/11
21:20-05:49
Nonstop5h 29m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Sat 1/11
16:24-20:03
Nonstop6h 39m
San Diego
Wed 5/11
09:15-17:55
Nonstop5h 40m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Sat 1/11
16:24-20:03
Nonstop6h 39m
San Diego
Sat 15/11
09:15-17:55
Nonstop5h 40m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Tue 9/12
17:15-20:44
Nonstop6h 29m
San Diego
Sat 13/12
22:00-06:39
Nonstop5h 39m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Sat 1/11
17:25-20:44
Nonstop6h 19m
San Diego
Tue 4/11
22:15-06:53
Nonstop5h 38m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Wed 29/10
16:24-20:03
Nonstop6h 39m
San Diego
Sat 15/11
09:15-17:55
Nonstop5h 40m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Wed 22/10
17:25-20:44
Nonstop6h 19m
San Diego
Sat 1/11
22:15-06:53
Nonstop5h 38m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Tue 23/9
17:35-20:44
Nonstop6h 09m
San Diego
Tue 30/9
22:13-06:50
Nonstop5h 37m
BostonSan Diego
BOS - SAN
BOSSAN
Boston Logan Intl
Sat 20/9
16:15-19:18
Nonstop6h 03m
San Diego
Tue 30/9
22:13-06:50
Nonstop5h 37m
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.
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 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?
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.
Travelling to a place near San Diego?
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Alternative routes for Boston to San Diego
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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.