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$119+ 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Diego are usually found in January or May, booked 67 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 September 11, 2025.

Round-trip from

$189
(Southwest)

One-way from

$119
(Hawaiian Airlines)

Popular in

December

Cheapest in

January

Average price

$351

Good round-trip deal

$257 or less

Good one-way deal

$163 or less
From Boston Logan Intl to San Diego
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One-way flight from Boston Logan Intl to San Diego
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Boston Logan Intl to San Diego.
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Price to beat on a one-way flight from Boston Logan Intl to San Diego.
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Find 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 September 11, 2025.

This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:10 pmBOS - SAN
1 stop10h 25mSouthwest
Sat 12/69:45 pmSAN - BOS
1 stop7h 20mSouthwest
Deal found 9/9$189
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:05 amBOS - SAN
1 stop8h 30mSouthwest
Tue 10/149:10 pmSAN - BOS
1 stop8h 15mSouthwest
Deal found 9/9$191
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:20 amBOS - SAN
1 stop8h 30mSouthwest
Sat 11/89:45 pmSAN - BOS
1 stop9h 00mSouthwest
Deal found 9/11$192
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:10 pmBOS - SAN
1 stop10h 25mSouthwest
Mon 11/179:45 pmSAN - BOS
1 stop7h 30mSouthwest
Deal found 9/9$194
This Southwest deal was found by Cheapflights users on 9/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/223:35 pmBOS - SAN
1 stop9h 00mSouthwest
Sat 10/256:35 amSAN - BOS
1 stop11h 15mSouthwest
Deal found 9/11$197
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/215:15 amBOS - SAN
2 stops15h 55mSouthwest
Tue 10/219:10 pmSAN - BOS
1 stop8h 15mSouthwest
Deal found 9/10$198
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:05 pmBOS - SAN
1 stop8h 05mSouthwest
Wed 10/297:30 pmSAN - BOS
2 stops9h 45mSouthwest
Deal found 9/10$201
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:00 pmBOS - SAN
1 stop8h 25mSouthwest
Mon 12/89:45 pmSAN - BOS
1 stop7h 30mSouthwest
Deal found 9/9$202
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/233:50 pmBOS - SAN
1 stop9h 40mSouthwest
Tue 10/289:10 pmSAN - BOS
1 stop8h 15mSouthwest
Deal found 9/10$204
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:10 pmBOS - SAN
1 stop10h 25mSouthwest
Sat 12/67:40 pmSAN - BOS
2 stops9h 25mSouthwest
Deal found 9/10$209

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 September 11, 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 10/1

4:10 pm-9:50 pm

1 stop8h 40m

San Diego

Mon 10/6

9:10 pm-8:25 am

1 stop8h 15m

$226

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 12/5

7:00 am-4:57 pm

1 stop12h 57m

San Diego

Wed 12/10

9:15 am-5:52 pm

Nonstop5h 37m

$237

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Thu 10/2

3:50 pm-10:30 pm

1 stop9h 40m

San Diego

Tue 10/7

6:25 pm-9:20 am

1 stop11h 55m

$238

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 10/22

7:20 am-10:49 am

Nonstop6h 29m

San Diego

Sat 11/1

9:20 pm-5:49 am

Nonstop5h 29m

$247

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 10/17

8:01 am-11:18 am

Nonstop6h 17m

San Diego

Sun 10/19

9:53 pm-6:41 am

Nonstop5h 48m

$247

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 10/3

7:18 am-10:30 am

Nonstop6h 12m

San Diego

Tue 10/7

8:55 pm-5:34 am

Nonstop5h 39m

$247

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 10/1

7:18 am-10:30 am

Nonstop6h 12m

San Diego

Mon 10/6

8:55 pm-5:34 am

Nonstop5h 39m

$247

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Fri 11/7

1:30 pm-6:50 pm

1 stop8h 20m

San Diego

Tue 11/11

8:05 pm-8:15 am

2 stops9h 10m

$248

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 11/1

6:59 pm-9:40 am

1 stop17h 41m

San Diego

Tue 11/4

11:37 am-12:20 am

1 stop9h 43m

$256

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 10/22

5:05 pm-10:10 pm

1 stop8h 05m

San Diego

Sun 10/26

9:10 pm-8:15 am

1 stop8h 05m

$261

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 23 results
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The best insider tips for Boston to San Diego flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to San Diego trip
Airports
BOS

Use the FlyLogan App to pre-order food and save time at BOS. Most restaurants participate, making it a convenient option.

Read more about BOSby Paul Rubio
SAN

Consider using the free San Diego Flyer shuttle for a budget-friendly transfer between SAN and the Old Town Transit Center.

Read more about SANby Blane Bachelor
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on SAN

Blane Bachelor

Blane Bachelor

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

Paul Rubio

Paul Rubio

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

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?

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Diego. Price data was last updated on August 29, 2025.

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 67 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, August is the cheapest month in which you can book a flight from Boston to San Diego (average of $286). Flying from Boston to San Diego in March is currently the most expensive (average of $366). 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 September 11, 2025.

When flying from Boston to San Diego, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 52% versus a flight in the morning.

What is the cheapest day to fly from Boston to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Boston to San Diego. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Boston to San Diego flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 11, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
JetBlue
7.2
Good
2,913 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 12 outbound flights from Logan Intl to San Diego offered by 10 different airlines.

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

    Flights from Boston Logan Intl to San Diego have been viewed 19 times in the past calendar month.

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

    Southwest, Alaska Airlines, and JetBlue can get you from Boston to San Diego in just under 6h 29m. Your travel time can differ by up to 6h 28m. 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 $84, Frontier will fly you from Boston to San Diego and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and Hawaiian Airlines - these airlines can fly you to your destination from $87 and $138, respectively. Frontier is currently priced 77% 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 ($119), Southwest ($123), and Delta ($124).

  • 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 Etihad Airways (97%), JetBlue (91%) or Icelandair (91%) 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 $118. On average you can expect to pay $906. The most popular route, (Boston Logan Intl - San Diego), can usually be booked for $159.

  • Where are the most common layover locations when flying from Boston to San Diego?

    Boston to San Diego flights have a layover in Philadelphia most often. Phoenix follows Philadelphia in terms of the most common layover location on Boston to San Diego flights. Washington, D.C. follows Phoenix in terms of the most frequent layover location on Boston to San Diego flights.

  • What are some popular things to do or see while on a layover in Philadelphia?

    Most Philadelphia visitors opt to spend their time experiencing Rittenhouse Square, University of Pennsylvania, and Citizens Bank Park. Rittenhouse Square, University of Pennsylvania, and Citizens Bank Park are located about 6.1 mi, 5.7 mi, and 4.3 mi, respectively from Philadelphia. Travelers can book a car rental at Philadelphia for about $56 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Phoenix?

    Phoenix travelers tend to visit Chase Field, Desert Ridge Marketplace, and Heritage Square more than any other notable places. Chase Field, Desert Ridge Marketplace and Heritage Square are located about 4.0 mi, 16.7 mi, and 4.0 mi, respectively from Phoenix Sky Harbor Intl if you are interested in checking them out. Those landing in Phoenix looking to spend some time exploring during their layover can rent a car for about $53 per day.

  • What are points of interest worth seeing during a layover in Washington, D.C.?

    If you're on a layover in Washington, D.C. and looking for things to do, consider visiting White House, National Mall, or U.S. Capitol. White House, National Mall, and U.S. Capitol can be visited by traveling about 22.4 mi, 23.3 mi, and 24.0 mi respectively from Washington, D.C. Dulles Intl. Travelers in need of a car in Washington, D.C. can rent one for about $54 per day.

  • Where are the least popular layover locations for Boston to San Diego flights?

    Flights departing from Boston and landing in San Diego layover in Charlotte least frequently. Chicago sees the next fewest layovers on Boston to San Diego flights.

  • 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, August is the cheapest month in which you can book a flight from Boston to San Diego (average of $286). Flying from Boston to San Diego in March is currently the most expensive (average of $366). 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City
Alpine

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Alternative routes for Boston to San Diego

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Top 10 airlines flying from Boston to San Diego

Discover the top 10 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$194FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$87Average$297FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$138Average$340FlexibilityNo cancel feeOn-time85%
DeltaCheapest$141Average$358FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$142Average$235FlexibilityNo cancel feeOn-time83%
JetBlueCheapest$191Average$373FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$237Average$417FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$247Average$427FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$248Average$450FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$291Average$505FlexibilityNo cancel feeOn-time63%

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