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Cheap flights from Boston to San Diego from $123

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Diego departing on 3/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
3:55 pm - 10:34 pm
BOS
-
SAN
9h 39m
1 stop
American Airlines Logo
10:35 pm - 10:46 am
SAN
-
BOS
9h 11m
1 stop
$223American Airlines
Sat, Feb 21 - Wed, Feb 25
Delta Logo
5:05 pm - 8:45 pm
BOS
-
SAN
6h 40mnonstop
Delta Logo
9:55 pm - 6:25 am
SAN
-
BOS
5h 30mnonstop
$227Delta
Sat, Feb 21 - Wed, Feb 25
American Airlines Logo
2:36 pm - 10:23 pm
BOS
-
SAN
10h 47m
1 stop
American Airlines Logo
10:35 pm - 9:54 am
SAN
-
BOS
8h 19m
1 stop
$228American Airlines
Wed, Mar 11 - Tue, Mar 17
Delta Logo
5:05 pm - 8:45 pm
BOS
-
SAN
6h 40mnonstop
Delta Logo
9:55 pm - 6:25 am
SAN
-
BOS
5h 30mnonstop
$232Delta
Sun, Feb 22 - Wed, Feb 25
JetBlue Logo
4:00 pm - 7:28 pm
BOS
-
SAN
6h 28mnonstop
JetBlue Logo
8:59 pm - 5:21 am
SAN
-
BOS
5h 22mnonstop
$233JetBlue
Wed, Mar 11 - Tue, Mar 17
JetBlue Logo
10:45 am - 2:23 pm
BOS
-
SAN
6h 38mnonstop
JetBlue Logo
3:35 pm - 11:48 pm
SAN
-
BOS
5h 13mnonstop
$234JetBlue
Tue, Mar 3 - Tue, Mar 10
JetBlue Logo
4:00 pm - 7:28 pm
BOS
-
SAN
6h 28mnonstop
JetBlue Logo
9:07 pm - 5:21 am
SAN
-
BOS
5h 14mnonstop
$236JetBlue
Wed, Mar 4 - Wed, Mar 11
JetBlue Logo
6:30 am - 10:01 am
BOS
-
SAN
6h 31mnonstop
JetBlue Logo
8:59 pm - 5:21 am
SAN
-
BOS
5h 22mnonstop
$237JetBlue
Tue, Mar 17 - Tue, Mar 24
American Airlines Logo
2:10 pm - 8:56 pm
BOS
-
SAN
9h 46m
1 stop
American Airlines Logo
10:35 pm - 9:54 am
SAN
-
BOS
8h 19m
1 stop
$238American Airlines
Wed, Feb 25 - Sun, Mar 1
Delta Logo
5:05 pm - 8:45 pm
BOS
-
SAN
6h 40mnonstop
Delta Logo
9:55 pm - 6:25 am
SAN
-
BOS
5h 30mnonstop
$242Delta
Sun, Feb 22 - Sun, Mar 1

United Airlines flights from Boston to San Diego

Our best United Airlines deals on Boston to San Diego flight tickets
United Airlines
Feb 22
BOS5:30 amBoston Logan Intl
9h 21m
1 stop
SAN11:51 amSan Diego
Feb 25
SAN6:55 pmSan Diego
7h 57m
1 stop
BOS5:52 amBoston Logan Intl
$249
United Airlines
Feb 26
BOS2:20 pmBoston Logan Intl
9h 26m
1 stop
SAN8:46 pmSan Diego
Apr 13
SAN2:05 pmSan Diego
7h 54m
1 stop
BOS12:59 amBoston Logan Intl
$281
United Airlines
Mar 1
BOS5:30 amBoston Logan Intl
9h 21m
1 stop
SAN11:51 amSan Diego
Mar 4
SAN7:05 amSan Diego
7h 16m
1 stop
BOS5:21 pmBoston Logan Intl
$283

Delta flights from Boston to San Diego

Our best Delta deals on Boston to San Diego flight tickets
Delta
Feb 22
BOS5:05 pmBoston Logan Intl
6h 40m
SAN8:45 pmSan Diego
Feb 25
SAN9:55 pmSan Diego
5h 30m
BOS6:25 amBoston Logan Intl
$227
Delta
Feb 22
BOS5:05 pmBoston Logan Intl
6h 40m
SAN8:45 pmSan Diego
Feb 25
SAN9:55 pmSan Diego
5h 30m
BOS6:25 amBoston Logan Intl
$232
Delta
Feb 22
BOS5:05 pmBoston Logan Intl
6h 40m
SAN8:45 pmSan Diego
Feb 26
SAN9:55 pmSan Diego
5h 30m
BOS6:25 amBoston Logan Intl
$237

momondo Fare Finder

 
Customize 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, momondo users made 832,500 searches. Data last updated February 2, 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

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 2/21

3:55 pm-10:34 pm

1 stop9h 39m

San Diego

Wed 2/25

10:35 pm-10:46 am

1 stop9h 11m

$223

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 2/21

5:05 pm-8:45 pm

Nonstop6h 40m

San Diego

Wed 2/25

9:55 pm-6:25 am

Nonstop5h 30m

$227

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 3/11

2:36 pm-10:23 pm

1 stop10h 47m

San Diego

Tue 3/17

10:35 pm-9:54 am

1 stop8h 19m

$228

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sun 2/22

5:05 pm-8:45 pm

Nonstop6h 40m

San Diego

Wed 2/25

9:55 pm-6:25 am

Nonstop5h 30m

$232

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 3/11

4:00 pm-7:28 pm

Nonstop6h 28m

San Diego

Tue 3/17

8:59 pm-5:21 am

Nonstop5h 22m

$233

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 3/3

10:45 am-2:23 pm

Nonstop6h 38m

San Diego

Tue 3/10

3:35 pm-11:48 pm

Nonstop5h 13m

$234

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 3/4

4:00 pm-7:28 pm

Nonstop6h 28m

San Diego

Wed 3/11

9:07 pm-5:21 am

Nonstop5h 14m

$236

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 3/17

6:30 am-10:01 am

Nonstop6h 31m

San Diego

Tue 3/24

8:59 pm-5:21 am

Nonstop5h 22m

$237

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 2/25

2:10 pm-8:56 pm

1 stop9h 46m

San Diego

Sun 3/1

10:35 pm-9:54 am

1 stop8h 19m

$238

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sun 2/22

5:05 pm-8:45 pm

Nonstop6h 40m

San Diego

Sun 3/1

9:55 pm-6:25 am

Nonstop5h 30m

$242

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from Boston to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of January, then departing from Boston during the month October is also very affordable. Most momondo users find prices during this month for around $337.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from Boston to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $346. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $441. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the afternoon when flights can be purchased for as low as $373. Flights in the morning are often more expensive with an average ticket price of $388.

What is the cheapest Boston Logan Intl to San Diego flight route?

Fly from Boston Logan Intl to San Diego for the best Boston Logan Intl - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $371 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Boston for as low as $324 on momondo.

What cabin class options are available on Boston Logan Intl to San Diego flights?

There are 4 cabin classes available to choose from on Boston Logan Intl to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Boston to San Diego flights?

You could potentially save up to 8% on your flight if you consider stops on a Boston to San Diego flight.

How have Boston to San Diego flight prices changed over time?

As of February 2026, prices for Boston to San Diego flights are approximately 13% cheaper when compared to flights at the same time last year.

When to book flights from Boston to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to San Diego (BOS to SAN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to San Diego

Best Price Found

$158

Fastest flight time

5h 55m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from Boston in the past 72 hours is $158. The best round-trip flight deal from Boston to San Diego found on momondo in the last 72 hours is $265.
The fastest flight from Boston to San Diego takes 5h 55m
Direct flights go from Boston to San Diego every day.
There is 1 airport in San Diego. From Boston there are direct flights to San Diego (SAN).
Search flight deals

  • How far is Boston Logan Intl to San Diego by plane?

    A flight from Boston Logan Intl to San Diego will travel around 2576.8 mi. In terms of flight time, this usually takes a little over 5h 55m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to San Diego Airport?

    Prices for flights from Boston Logan Intl Airport to San Diego Airport are updated daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to San Diego Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents you'll need for your trip to San Diego Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Boston to San Diego?

  • What is the most popular airline from Boston to San Diego?

Best airlines flying from Boston to San Diego

Compare and see reviews for airlines that fly from Boston to San Diego with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $127Free CancellationRating
7.9
8,129 reviews
Search Delta flights
Spirit AirlinesPriceFrom $129Free CancellationRating
6.3
8,394 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $132Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
JetBluePriceFrom $160Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
Alaska AirlinesPriceFrom $237Free CancellationRating
8.0
11,827 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,229 reviews
Search United Airlines flights
American AirlinesPriceFrom $256Free CancellationRating
7.2
11,211 reviews
Search American Airlines flights
SouthwestPriceFrom $280Free CancellationRating
8.0
4,272 reviews
Search Southwest flights

  • Alaska Airlines Flights From Boston to San Diego

    Across 5 Alaska Airlines flights from Boston to San Diego this week, the average price was $422, with the best Alaska Airlines deals starting from $237 round-trip. 11,827 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.

  • Delta Flights From Boston to San Diego

    $127 is the best Delta flight deal from Boston to San Diego found on momondo over the last 72 hours. The average Delta ticket price found was closer to $335, however, with flight time and availability significantly affecting the price. Delta (7.9/10 from 8,129 user reviews) flies into San Diego from Boston 7 times in an average week so prices can vary.

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
Chula Vista
El Cajon
Julian
Poway
National City
Imperial Beach
San Ysidro
Borrego Springs
La Mesa
Alpine
Lemon Grove
Santee

Why use momondo?

Why should I use momondo to find a flight deal from Boston to San Diego?

It is quick and easy to find Boston to San Diego flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Diego that suits you.

Can I find flights from Boston to San Diego with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Diego from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to San Diego?

momondo provides multiple filters to help you find the best flight to San Diego from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to San Diego right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Boston to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your San Diego trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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