HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$143+ Cheap flights from Boston to San Diego (BOS - SAN)

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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAN
Jun 14 — Jun 211
Sun 6/14
Sun 6/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Boston Logan Intl to San Diego are usually found in January or October, booked 37 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Boston to San Diego

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 May 15, 2026.

This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:49 am
BOS
-
SAN
1 stop10h 33m
American Airlines
Mon 7/2010:28 pm
SAN
-
BOS
1 stop7h 52m
American Airlines
Deal found 5/13$245
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:26 pm
BOS
-
SAN
1 stop8h 28m
United Airlines
Mon 6/810:40 pm
SAN
-
BOS
1 stop7h 49m
United Airlines
Deal found 5/11$247
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:57 pm
BOS
-
SAN
1 stop9h 02m
American Airlines
Fri 6/59:25 pm
SAN
-
BOS
1 stop8h 56m
American Airlines
Deal found 5/13$252
This Kissandfly.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:49 am
BOS
-
SAN
1 stop10h 33m
Alaska Airlines
Sat 7/118:52 pm
SAN
-
BOS
Nonstop5h 48m
Alaska Airlines
Deal found 5/13$254
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:07 pm
BOS
-
SAN
1 stop8h 27m
American Airlines
Tue 9/2912:05 pm
SAN
-
BOS
1 stop8h 05m
American Airlines
Deal found 5/10$256
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:45 am
BOS
-
SAN
1 stop8h 04m
United Airlines
Sun 5/3110:30 pm
SAN
-
BOS
1 stop8h 23m
United Airlines
Deal found 5/12$257
This SmartFares deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/64:37 pm
BOS
-
SAN
Nonstop6h 22m
JetBlue
Sat 6/138:40 pm
SAN
-
BOS
Nonstop5h 40m
JetBlue
Deal found 5/14$261
This Cheapflightsfares deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/39:00 am
BOS
-
SAN
Nonstop6h 31m
JetBlue
Sat 6/69:10 pm
SAN
-
BOS
Nonstop5h 33m
JetBlue
Deal found 5/13$262
This Delta deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:10 pm
BOS
-
SAN
Nonstop6h 21m
Delta
Wed 6/109:54 pm
SAN
-
BOS
Nonstop5h 36m
Delta
Deal found 5/13$267
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:49 pm
BOS
-
SAN
1 stop8h 50m
American Airlines
Fri 6/59:55 pm
SAN
-
BOS
1 stop7h 46m
American Airlines
Deal found 5/13$272
This SmartFares deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:37 am
BOS
-
SAN
Nonstop6h 15m
JetBlue
Wed 6/108:44 pm
SAN
-
BOS
Nonstop5h 37m
JetBlue
Deal found 5/13$275

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 May 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$242
(United Airlines)

One-way from

$143
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$350

Good round-trip deal

$300 or less

Good one-way deal

$168 or less
Provider with most accurate pricing for Boston Logan Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-San Diego flights.
Search Deals
From Boston Logan Intl to San Diego
Search Deals
One-way flight from Boston Logan Intl to San Diego
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to San Diego.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to San Diego.
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated May 15, 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 round-trip

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 5/28

12:30 pm-6:30 pm

1 stop9h 00m

San Diego

Thu 5/28

10:40 pm-9:39 am

1 stop7h 59m

$257

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 6/5

5:15 pm-8:36 pm

Nonstop6h 21m

San Diego

Wed 6/10

9:54 pm-6:30 am

Nonstop5h 36m

$282

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 7/30

1:10 pm-11:25 pm

1 stop13h 15m

San Diego

Tue 8/4

9:30 pm-6:00 am

Nonstop5h 30m

$298

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 7/3

2:20 pm-7:35 pm

1 stop8h 15m

San Diego

Sat 7/18

2:35 pm-11:05 pm

Nonstop5h 30m

$312

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 6/5

4:05 pm-11:20 pm

1 stop10h 15m

San Diego

Wed 6/10

2:35 pm-11:05 pm

Nonstop5h 30m

$312

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 5/29

6:40 pm-10:09 pm

Nonstop6h 29m

San Diego

Mon 6/8

8:54 pm-5:44 am

Nonstop5h 50m

$322

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 8/1

5:10 am-9:50 am

1 stop7h 40m

San Diego

Thu 8/6

9:30 pm-6:00 am

Nonstop5h 30m

$327

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 5/28

7:20 am-4:21 pm

1 stop12h 01m

San Diego

Mon 6/8

8:54 pm-5:44 am

Nonstop5h 50m

$332

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Mon 5/25

6:00 am-11:21 am

1 stop8h 21m

San Diego

Thu 5/28

10:40 pm-9:39 am

1 stop7h 59m

$335

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 5/19

5:45 am-11:16 am

1 stop8h 31m

San Diego

Thu 5/28

10:30 pm-9:48 am

1 stop8h 18m

$335

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/14

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Boston to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to San Diego in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

The price you pay for your flight from Boston to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $328). Flying from Boston to San Diego in December is currently the most expensive (average of $468). 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 May 15, 2026.

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 much does it cost to fly round-trip from Boston to San Diego?

The best insider tips for Boston to San Diego flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to San Diego trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Paul Rubio

Paul Rubio

Expert on BOS

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated May 15, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Boston to San Diego by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,298 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,370 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,455 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
JetBlue
7.2
Good
2,977 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,665 reviews
Southwest
8.0
Very good
4,298 reviews

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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.

  • What airports do I use to fly from Boston to San Diego?

    To fly from Boston to San Diego, you need to book a flight from Logan Intl (BOS) to San Diego (SAN). Nonstop flights to San Diego from Boston Logan Intl take 6h 05m on average. When it comes time to book airfare, you have a few options: there are 9 outbound flights from Logan Intl to San Diego offered by 8 different airlines.

  • How popular is this Boston to San Diego flight route?

    Flights from Boston Logan Intl to San Diego have been viewed 14 times in the past calendar month.

  • How long is the flight from Boston to San Diego?

    United Airlines, Delta, and Southwest can get you from Boston to San Diego in just under 6h 21m. Your travel time can differ by up to 6h 54m. There are 2581 mi between Boston and San Diego. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boston to San Diego round-trip?

    Currently priced at $118, Hawaiian Airlines will fly you from Boston to San Diego and back. In addition to Hawaiian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and Delta - these airlines can fly you to your destination from $129 and $129, respectively. Hawaiian Airlines is currently priced 68% below the average price you’ll pay for this route.

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

    The cheapest airlines for a one-way flight from Boston to San Diego are Alaska Airlines ($118), Hawaiian Airlines ($118), and JetBlue ($118).

  • What are the most reliable airlines from Boston to San Diego?

    No one likes to see their flight delayed. When booking a flight from Boston to San Diego consider choosing TAP AIR PORTUGAL (97%), Icelandair (90%) or Etihad Airways (87%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Boston to San Diego is $138. On average you can expect to pay $991. The most popular route, (Boston Logan Intl - San Diego), can usually be booked for $242.

  • 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 vacation 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 $328). Flying from Boston to San Diego in December is currently the most expensive (average of $468). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
National City
Coronado
Poway
La Mesa
Julian
Lemon Grove

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.

Top 8 airlines flying from Boston to San Diego

Discover the top 8 airlines that operate flights from Boston to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$118Average$324FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$129Average$297FlexibilityNo cancel feeOn-time65%
DeltaCheapest$129Average$348FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$168Average$357FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$223Average$409FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$236Average$401FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$244Average$444FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$281Average$406FlexibilityNo cancel feeOn-time63%

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.