HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$48+ Cheap flights from Baltimore to San Diego (BWI - 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SAN
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore 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 Baltimore/Washington to San Diego are usually found in August or July, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Baltimore to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) 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 August 16, 2025.

Round-trip from

$205
(Mytrip)

One-way from

$48
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$333
From Baltimore/Washington to San Diego
Search Deals
One-way flight from Baltimore/Washington to San Diego
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($39 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 August 2025
Search Deals

Find flight deals from Baltimore to San Diego

Cheapest flights from Baltimore to San Diego
Explore the most affordable flight options available from Baltimore to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Mytrip deal was found by Cheapflights users on 8/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:45 amBWI - SAN
2 stops20h 49mSpirit Airlines
Tue 10/76:15 amSAN - BWI
1 stop8h 06mSpirit Airlines
Deal found 8/16$205
This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/305:19 pmBWI - SAN
2 stops17h 02mSpirit Airlines
Sat 9/66:15 amSAN - BWI
2 stops21h 46mSpirit Airlines
Deal found 8/14$206
This Frontier deal was found by Cheapflights users on 8/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1212:53 pmBWI - SAN
1 stop8h 23mFrontier
Sun 9/219:03 pmSAN - BWI
2 stops18h 02mFrontier
Deal found 8/15$207
This Frontier deal was found by Cheapflights users on 8/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/126:27 pmBWI - SAN
1 stop8h 26mFrontier
Fri 9/1910:11 amSAN - BWI
2 stops11h 06mFrontier
Deal found 8/15$208
This Cheapflightsfares deal was found by Cheapflights users on 8/16. 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 10/296:26 pmBWI - SAN
1 stop7h 58mSpirit Airlines
Sat 11/17:47 pmSAN - BWI
1 stop6h 43mSpirit Airlines
Deal found 8/16$209
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/55:41 pmBWI - SAN
2 stops16h 48mMultiple Airlines
Sun 9/76:35 amSAN - BWI
1 stop8h 07mMultiple Airlines
Deal found 8/16$210
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/208:16 amBWI - SAN
1 stop18h 18mSpirit Airlines
Wed 10/16:15 amSAN - BWI
1 stop19h 15mSpirit Airlines
Deal found 8/14$211
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2511:27 amBWI - SAN
2 stops22h 54mSpirit Airlines
Tue 9/91:35 pmSAN - BWI
1 stop11h 55mSpirit Airlines
Deal found 8/16$212
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/219:59 pmBWI - SAN
1 stop15h 31mMultiple Airlines
Fri 12/127:05 pmSAN - BWI
1 stop9h 18mMultiple Airlines
Deal found 8/14$213
This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/252:17 pmBWI - SAN
1 stop7h 31mFrontier
Mon 9/86:35 amSAN - BWI
1 stop8h 07mFrontier
Deal found 8/16$214
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:50 amBWI - SAN
1 stop13h 40mSpirit Airlines
Sun 12/77:05 pmSAN - BWI
1 stop9h 18mSpirit Airlines
Deal found 8/16$215
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:09 amBWI - SAN
1 stop12h 47mSpirit Airlines
Sat 8/307:01 pmSAN - BWI
2 stops11h 09mSpirit Airlines
Deal found 8/13$216

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore 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 August 16, 2025.
Use the filters below to find and compare flights from Baltimore to San Diego that are best for you.

Fly from

Baltimore

Fly to

San Diego

Route

Depart

Return

Price

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Thu 10/23

6:26 pm-7:26 am

1 stop16h 00m

San Diego

Mon 10/27

6:41 am-12:13 am

2 stops14h 32m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Tue 9/30

5:45 am-11:34 pm

2 stops20h 49m

San Diego

Tue 10/7

6:15 am-5:21 pm

1 stop8h 06m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Wed 9/10

8:16 am-6:42 pm

1 stop13h 26m

San Diego

Fri 9/19

10:11 am-10:33 pm

2 stops9h 22m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Tue 9/30

8:16 am-12:31 pm

1 stop7h 15m

San Diego

Fri 10/17

6:15 am-5:21 pm

1 stop8h 06m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Thu 9/11

8:16 am-6:42 pm

1 stop13h 26m

San Diego

Wed 9/17

1:35 pm-7:01 am

2 stops14h 26m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Sat 10/4

8:16 am-6:42 pm

1 stop13h 26m

San Diego

Thu 10/9

6:25 am-5:21 pm

1 stop7h 56m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Thu 9/25

7:02 pm-7:29 am

1 stop15h 27m

San Diego

Tue 10/7

6:41 am-11:53 pm

2 stops14h 12m

$205

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Fri 10/3

6:27 pm-11:53 pm

1 stop8h 26m

San Diego

Sun 10/5

5:37 pm-12:08 pm

2 stops15h 31m

$206

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Fri 11/7

10:04 am-6:23 pm

2 stops11h 19m

San Diego

Mon 11/10

6:25 am-6:04 pm

1 stop8h 39m

$206

BaltimoreSan Diego

BWI - SAN

BWISAN

Baltimore/Washington

Sun 9/7

7:02 pm-11:34 pm

1 stop7h 32m

San Diego

Wed 9/17

1:35 pm-7:01 am

2 stops14h 26m

$206

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 20 results
1
2

The best insider tips for Baltimore 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 Baltimore to San Diego trip
Airports
BWI

For early morning flights, arrive 20-30 minutes early to navigate busy security lines efficiently.

Read more about BWIby Emily Zemler
SAN

Use the free San Diego Flyer shuttle for convenient transport between SAN and 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
Emily Zemler

Emily Zemler

Expert on BWI

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Baltimore to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Baltimore 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 Baltimore to San Diego

How far ahead should I book a flight from Baltimore to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to San Diego. Price data was last updated on August 8, 2025.

Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from Baltimore to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Baltimore to San Diego?

Currently, August is the cheapest month in which you can book a flight from Baltimore to San Diego (average of $286). Flying from Baltimore 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 BWI to SAN?

Find hourly flight availability from Baltimore 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 August 16, 2025.

It’s typically best to fly out from Baltimore to San Diego in the evening. Doing so could potentially save you 26% on the flight price compared to flying at noon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Baltimore to San Diego. Price data was last updated on August 10, 2025.

Travelers seeking maximum savings on their Baltimore to San Diego flight should consider departing on Saturday afternoons when fares are most often at their lowest. Friday at noon 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 August 16, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Baltimore to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,985 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,042 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Baltimore 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 Baltimore to San Diego?

    Booking a flight from Baltimore/Washington (BWI) to San Diego (SAN) is your only option if you wish to fly from Baltimore to San Diego. On a typical day, there are 2 flights from Baltimore/Washington to San Diego, all of which are around 5h 20m for a nonstop flight. You can also purchase a plane ticket from 7 airlines when you book a flight from Baltimore/Washington to San Diego.

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

    Within the past month, 4 users have taken a look at flights from Baltimore/Washington to San Diego.

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

    Our cheapest airline available from Baltimore to San Diego is Frontier. Our recent data shows that you can find tickets from as low as $113 on this airline. Additional options worth looking into are Spirit Airlines and American Airlines, starting at $138 and $177 round-trip. You may be able to fly from Baltimore to San Diego for 74% less than the average price by searching for these airlines.

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

    Looking at all options, your cheapest flight can be booked for $166. While the most popular route (Baltimore/Washington - San Diego) can be booked for $111 on average our data indicates $389 when flying from Baltimore to San Diego.

  • Can I find deals for flights from Baltimore to San Diego that include hotel bookings?

    Yes. In addition to deals on Baltimore to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Baltimore to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Baltimore to San Diego.

  • Can I find deals for business class flights from Baltimore to San Diego?

    Yes. Cheapflights offers flight deals from Baltimore 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 Baltimore to San Diego?

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

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.

Alternative routes for Baltimore to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Las Vegas flights
Dulles Intl to Los Angeles flights
Baltimore to Las Vegas flights
Reagan-National to Los Angeles flights
Reagan-National to Las Vegas flights
Dulles Intl to San Francisco flights
Philadelphia to Las Vegas flights
Reagan-National to San Francisco flights
Baltimore to San Francisco flights
Baltimore to Los Angeles flights
Philadelphia to Los Angeles flights
Philadelphia to San Francisco flights
Dulles Intl to San Diego flights
Reagan-National to San Diego flights
Dulles Intl to Ontario flights
Baltimore to Burbank flights
Baltimore to Ontario flights
Baltimore to Santa Ana flights
Philadelphia to San Diego flights
Baltimore to Oakland flights
Philadelphia to Ontario flights
Reagan-National to Ontario flights
Reagan-National to Santa Ana flights
Baltimore to San Jose flights
Reagan-National to San Jose flights
Dulles Intl to Santa Ana flights
Dulles Intl to Sacramento flights
Dulles Intl to San Jose flights
Philadelphia to Santa Ana flights
Dulles Intl to Palm Springs flights
Baltimore to Sacramento flights
Philadelphia to Burbank flights
Reagan-National to Sacramento flights
Philadelphia to Oakland flights
Philadelphia to Santa Barbara flights
Philadelphia to Palm Springs flights
Dulles Intl to Reno flights
Reagan-National to Palm Springs flights
Dulles Intl to Oakland flights
Philadelphia to San Jose flights
Baltimore to Palm Springs flights
Reagan-National to Reno flights
Baltimore to Bakersfield flights
Reagan-National to Oakland flights
Reagan-National to Medford flights
Baltimore to Reno flights
Reagan-National to Burbank flights
Philadelphia to Reno flights
Dulles Intl to Burbank flights

Top 7 airlines flying from Baltimore to San Diego

Discover the top 7 airlines that operate flights from Baltimore 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 August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$258FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$138Average$292FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$177Average$469FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$211Average$347FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$257Average$483FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$444FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$307Average$496FlexibilityNo 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.
Site
©2025 Cheapflights