Cheap flights from Boston to San Diego
Cheapflights Tip: The best prices from Boston Logan Intl to San Diego are usually found in January or November, booked 56 days in advance, depart on a Monday or Tuesday and return on a Monday
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 28 October 2025.
Popular in | December |
|---|---|
Cheapest in | January |
Average price | C$ 513 |
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?
The best time to book flights from Boston to San Diego is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 C$ 159). Flying from Boston to San Diego in July is currently the most expensive (average of C$ 276). 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?
When flying from Boston to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How often are flights from Boston to San Diego delayed?
About 14% of weekly flights between Boston and San Diego have experienced delays in the past year, with the average delay time being 137 minutes.
What is the most punctual flight time for Boston to San Diego flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to San Diego flights?
Over the past year, Spirit Airlines has had the lowest number of delays on this route, with no flights being classified as delayed.
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.
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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?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Diego. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Boston to San Diego?
Cheapflights simply makes it quick and affordable to book flights from Boston to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
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?
Of course! You can now track prices for flights from Boston to San Diego and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.