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$39+ Cheap flights from San Francisco to San Diego (SFO - 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SAN
Aug 26 — Sep 21
Tue 8/26
Tue 9/2
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to San Diego are usually found in January or February, booked 72 days in advance, depart on a Saturday or Tuesday and return on a Friday

Cheap flight deals from San Francisco to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) 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 21, 2025.

Round-trip from

$70
(Frontier)

One-way from

$39
(Hawaiian Airlines)

Popular in

December

Cheapest in

January

Average price

$159

Good round-trip deal

$109 or less

Good one-way deal

$62 or less
From San Francisco to San Diego
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One-way flight from San Francisco to San Diego
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from San Francisco to San Diego.
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Price to beat on a one-way flight from San Francisco to San Diego.
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Find flight deals from San Francisco to San Diego

Cheapest flights from San Francisco to San Diego
Explore the most affordable flight options available from San Francisco to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2025.

This Frontier deal was found by Cheapflights users on 8/21. 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.
Thu 10/231:29 pmSFO - SAN
Nonstop1h 42mFrontier
Fri 10/2410:32 amSAN - SFO
Nonstop1h 52mFrontier
Deal found 8/21$70
This Frontier deal was found by Cheapflights users on 8/21. 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.
Thu 9/112:17 pmSFO - SAN
Nonstop1h 41mFrontier
Sat 9/137:20 pmSAN - SFO
Nonstop1h 49mFrontier
Deal found 8/21$71
This Cheapflightsfares deal was found by Cheapflights users on 8/21. 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.
Thu 9/42:17 pmSFO - SAN
Nonstop1h 41mFrontier
Fri 9/511:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/21$72
This Cheapflightsfares deal was found by Cheapflights users on 8/20. 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.
Sat 9/69:59 pmSFO - SAN
Nonstop1h 41mFrontier
Mon 9/811:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/20$73
This Frontier deal was found by Cheapflights users on 8/21. 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 10/241:29 pmSFO - SAN
Nonstop1h 42mFrontier
Sun 10/2610:32 amSAN - SFO
Nonstop1h 52mFrontier
Deal found 8/21$74
This Frontier deal was found by Cheapflights users on 8/20. 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.
Sat 8/309:59 pmSFO - SAN
Nonstop1h 39mFrontier
Fri 9/511:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/20$75
This Cheapflightsfares deal was found by Cheapflights users on 8/21. 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.
Thu 9/42:17 pmSFO - SAN
Nonstop1h 41mFrontier
Sat 9/67:20 pmSAN - SFO
Nonstop1h 49mFrontier
Deal found 8/21$76
This Southwest deal was found by Cheapflights users on 8/19. 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 9/116:00 amSFO - SAN
Nonstop1h 30mSouthwest
Sun 9/146:30 amSAN - SFO
Nonstop1h 40mSouthwest
Deal found 8/19$77
This Mytrip deal was found by Cheapflights users on 8/20. 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.
Sun 8/311:27 pmSFO - SAN
Nonstop1h 43mFrontier
Fri 9/1211:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/20$78
This Cheapflightsfares deal was found by Cheapflights users on 8/19. 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.
Fri 9/52:17 pmSFO - SAN
Nonstop1h 41mFrontier
Mon 9/811:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/19$79
This Frontier deal was found by Cheapflights users on 8/19. 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 8/251:02 pmSFO - SAN
Nonstop1h 43mFrontier
Fri 9/511:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/19$80
This Booking.com deal was found by Cheapflights users on 8/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/42:17 pmSFO - SAN
Nonstop1h 41mFrontier
Mon 9/811:28 amSAN - SFO
Nonstop1h 54mFrontier
Deal found 8/19$81

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco 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 21, 2025.
Use the filters below to find and compare flights from San Francisco to San Diego that are best for you.

Fly from

San Francisco

Fly to

San Diego

Route

Depart

Return

Price

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Wed 9/10

11:10 am-12:52 pm

Nonstop1h 42m

San Diego

Wed 9/10

1:58 pm-3:35 pm

Nonstop1h 37m

$72

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Thu 9/11

6:15 am-7:55 am

Nonstop1h 40m

San Diego

Thu 9/11

10:38 am-12:20 pm

Nonstop1h 42m

$72

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Mon 10/13

1:29 pm-3:11 pm

Nonstop1h 42m

San Diego

Thu 10/16

10:32 am-12:24 pm

Nonstop1h 52m

$74

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sun 8/31

1:27 pm-3:10 pm

Nonstop1h 43m

San Diego

Mon 9/8

11:28 am-1:22 pm

Nonstop1h 54m

$74

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Tue 9/30

6:00 am-7:41 am

Nonstop1h 41m

San Diego

Thu 10/2

10:30 am-12:22 pm

Nonstop1h 52m

$75

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Mon 10/13

6:35 pm-8:05 pm

Nonstop1h 30m

San Diego

Thu 10/16

11:00 am-12:45 pm

Nonstop1h 45m

$77

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Wed 10/22

10:26 am-12:16 pm

Nonstop1h 50m

San Diego

Sat 10/25

12:18 pm-2:01 pm

Nonstop1h 43m

$77

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sun 10/26

6:30 am-8:00 am

Nonstop1h 30m

San Diego

Sun 11/2

7:00 am-8:45 am

Nonstop1h 45m

$77

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Tue 10/21

10:26 am-12:16 pm

Nonstop1h 50m

San Diego

Thu 10/23

12:18 pm-2:01 pm

Nonstop1h 43m

$77

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Fri 9/12

6:00 am-7:30 am

Nonstop1h 30m

San Diego

Sat 9/13

6:15 pm-7:50 pm

Nonstop1h 35m

$77

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 20 results
1
2

The best insider tips for San Francisco 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 San Francisco to San Diego trip
Airlines
Frontier

Frontier's UpFront Plus guarantees an empty middle seat, ideal for extra space.


Frontier charges for carry-ons; add during booking for lower fees, essential for budget planning.

Read more about Frontierby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom, perfect for added comfort on short flights.


Basic Economy restricts carry-ons, but Premier members are exempt, ideal for frequent flyers.

Read more about United Airlinesby Harriet Baskas
Alaska Airlines

Alaska's Premium Class offers extra legroom and free cocktails, ideal for a short flight.


Saver Fare allows a carry-on, but no seat selection in advance, suitable for budget travelers.

Read more about Alaska Airlinesby Robert Schrader
Southwest

Southwest offers two free checked bags, a great perk for budget-conscious travelers.


Southwest's open seating policy allows flexibility; check in early for better seat choices.

Read more about Southwestby Marisa Garcia
Airports
SFO

For a quick security check, use the mezzanine level checkpoint at Harvey Milk Terminal 1, accessible from the Terminal 1 AirTrain station.

Read more about SFOby Harriet Baskas
SAN

Use the free San Diego Flyer shuttle for convenient transport between SAN and the Old Town Transit Center every 20-30 minutes.

Read more about SANby Blane Bachelor
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier and Southwest

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
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

Best time to book a flight from San Francisco to San Diego

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

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

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

The price you pay for your flight from San Francisco to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 72 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 San Francisco to San Diego?

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

Find hourly flight availability from San Francisco 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 21, 2025.

A simple way to save on the total cost of your ticket is to fly from San Francisco to San Diego in the morning. If you’re flexible enough to do this you can expect to save up to 36% on your trip compared to booking a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from San Francisco to San Diego. Price data was last updated on August 17, 2025.

Travelers seeking maximum savings on their San Francisco to San Diego flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday 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 21, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Hawaiian Airlines from San Francisco to San Diego to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Southwest
8.0
Very good
4,245 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Hawaiian Airlines
7.8
Good
2,672 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
United Airlines
7.4
Good
8,930 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot
Frontier
5.8
Fair
3,207 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Seleste,Dec 2024

FAT - SAN

The attention and efficiency of the staff and the good handling of the pilot

Related info for your journey

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

    If you wish to fly to San Diego from San Francisco, then you need to book flights from San Francisco to San Diego. There are 73 flights from San Francisco (SFO) to San Diego (SAN) per day to choose from. Flights to San Diego from San Francisco are available from 8 different airlines, which means you should have some options if you want to compare airfare deals. 1h 26m is how long a nonstop flight from San Francisco to San Diego typically takes.

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

    Flights from San Francisco to San Diego have been viewed 209 times in the past calendar month.

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

    Airlines like United Airlines and Frontier fly from San Francisco to San Diego in about 1h 42m. The time it takes to get you to your destination is usually consistent. San Francisco and San Diego are separated by a distance of 446 mi. All flights are typically nonstop.

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

    Flying on Spirit Airlines is currently your cheapest option to San Diego, with prices starting at $28. Additional round-trip tickets that might be worth considering are offered by Frontier and Hawaiian Airlines, with the lowest prices starting at $37 and $38, respectively. These flights start at 79% lower than the current average price 3 months from now.

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

    $39 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Southwest and Hawaiian Airlines, with prices starting from $39 and $39, respectively.

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

    Before booking your flight to San Diego from San Francisco, check out the most reliable airlines to get you to your destination on time: Air China (88%), Air New Zealand (79%), Singapore Airlines( 78%).

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

    Looking for the cheapest flight from San Francisco to San Diego? While on average our users pay $300, our data indicates the cheapest price to be $38. The most popular route (San Francisco - San Diego), is priced around $50.

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

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to San Diego

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Top 8 airlines flying from San Francisco to San Diego

Discover the top 8 airlines that operate flights from San Francisco 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 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$28Average$89FlexibilityNo cancel feeOn-time65%
FrontierCheapest$37Average$100FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$38Average$148FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$57Average$184FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$57Average$194FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$92Average$190FlexibilityNo cancel feeOn-time63%
DeltaCheapest$98Average$196FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$177Average$316FlexibilityNo cancel feeOn-time71%

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