$29 Cheap Flights from San Francisco (SFO) to San Diego (SAN)

View $29 flight on Mon, Aug 11, 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)

Cheap Flights from San Francisco to San Diego (SFO-SAN)

Prices were available within the past 7 days and start at $29 for one-way flights and $57 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Jul 29 - Wed, Jul 30
SFO
San Francisco
SAN
San Diego
$57 Roundtrip, found 2 hours ago
$57
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Jul 29 from San Francisco to San Diego, returning Wed, Jul 30, priced at $57 found 2 hours ago
Southwest Airlines
Tue, Aug 5 - Wed, Aug 6
SFO
San Francisco
SAN
San Diego
$65 Roundtrip, found 12 hours ago
$65
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Tue, Aug 5 from San Francisco to San Diego, returning Wed, Aug 6, priced at $65 found 12 hours ago
Frontier Airlines
Mon, Jul 21 - Thu, Jul 24
SFO
San Francisco
SAN
San Diego
$66 Roundtrip, just found
$66
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Jul 21 from San Francisco to San Diego, returning Thu, Jul 24, priced at $66 just found
United
Thu, Jul 31 - Wed, Aug 6
SFO
San Francisco
SAN
San Diego
$67 Roundtrip, found 1 hour ago
$67
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jul 31 from San Francisco to San Diego, returning Wed, Aug 6, priced at $67 found 1 hour ago
Frontier Airlines
Mon, Jul 21 - Thu, Jul 24
SFO
San Francisco
SAN
San Diego
$72 Roundtrip, just found
$72
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Jul 21 from San Francisco to San Diego, returning Thu, Jul 24, priced at $72 just found
Southwest Airlines
Sat, Oct 11 - Tue, Oct 14
SFO
San Francisco
SAN
San Diego
$74 Roundtrip, just found
$74
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Oct 11 from San Francisco to San Diego, returning Tue, Oct 14, priced at $74 just found
Southwest Airlines
Mon, Aug 11 - Wed, Aug 13
SFO
San Francisco
SAN
San Diego
$75 Roundtrip, just found
$75
Roundtrip
just found
Select Southwest Airlines flight, departing Mon, Aug 11 from San Francisco to San Diego, returning Wed, Aug 13, priced at $75 just found
Alaska Airlines
Mon, Aug 4 - Wed, Aug 6
SFO
San Francisco
SAN
San Diego
$77 Roundtrip, just found
$77
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Aug 4 from San Francisco to San Diego, returning Wed, Aug 6, priced at $77 just found
Southwest Airlines
Sat, Aug 9 - Fri, Aug 15
SFO
San Francisco
SAN
San Diego
$78 Roundtrip, found 1 hour ago
$78
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sat, Aug 9 from San Francisco to San Diego, returning Fri, Aug 15, priced at $78 found 1 hour ago
American Airlines
Sat, Aug 16 - Sun, Aug 17
SFO
San Francisco
CLD
Carlsbad
$159 Roundtrip, just found
$159
Roundtrip
just found
Select American Airlines flight, departing Sat, Aug 16 from San Francisco to Carlsbad, returning Sun, Aug 17, priced at $159 just found

Find the cheapest month to fly from San Francisco (SFO) to San Diego (SAN)

September is typically the cheapest month to fly

From $48 - $97 per traveler.

Graph displaying average flight prices per month

Flights from San Francisco (SFO) to San Diego (SAN)
Origin airport
San Francisco Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$57
Distance
446 mi
Average flight time
1 hour 31 mins

San Francisco to San Diego Flights

The cheapest times to fly from San Francisco to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to San Diego are during the month of July. You can find some of the cheapest flights from San Francisco to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to San Diego

Sunday is one of the best days to book for cheap flights from San Francisco to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $29 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN) cost?
Pick up cheap return tickets starting from $48 from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving SFO on July 21 2025 and touching down at SAN. The price was last updated on July 5 2025 and has not changed since.
What is the cheapest month to fly from SFO to SAN?
The cheapest flights from SFO to SAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
Skip the stopovers and travel straight to San Diego Intl. Airport (SAN) from San Francisco Intl. Airport (SFO) with 4 carriers, including:

  • Alaska Airlines
  • United Airlines
  • Southwest Airlines

What is the cheapest airline that flies from SFO to SAN?
Currently, the cheapest carrier offering one-way flights from SFO to SAN is Frontier Airlines. You can book a seat on this route from $24. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SFO on August 11 2025. Prices were last updated on July 5 2025 and have not changed since.
How many flights per day from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
When taking off from San Francisco Intl. Airport (SFO), you'll have your pick from an average of 17 daily direct flights to San Diego Intl. Airport (SAN).
What are the most popular departure times for flights from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
Flights between SFO and SAN are busiest at 8 AM. For a more relaxed trip and potentially cheaper fares, choose a time outside the usual busy windows.
What day of the week has the most flights from SFO to SAN?
If you travel on a Sunday, you'll get the widest range of options for flights from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN).
What is the earliest flight from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
Catch the earliest flight at around 6:00AM UTC-8, departing from San Francisco Intl. Airport (SFO). You'll be in the air for about 1h 36m, coming in to land at San Diego Intl. Airport (SAN) at approximately 7:36AM UTC-8.
How long does it take to fly from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
The average flight time from SFO to SAN is 1 hour and 36 minutes, covering a distance of 450 mi.
What airline has the least delays from SFO to SAN?
Consider booking with American Airlines if you'd like to go straight from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN) without any delays. This airline has the best track record for punctuality, with an on-time performance of 100%. Want real-time updates? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
Opt for a flight from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Diego from San Francisco Intl. Airport (SFO)?
Browse your flight options from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN). This is the only San Diego airport you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN) last-minute?
Last-minute fares from SFO to SAN are generally more expensive. To lock in the best rates, start looking for flights as early as possible. That said, if you're flexible with your travel dates, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a SFO to SAN flight and hotel package?
You can save money by booking a SFO to SAN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your ideal flights and accommodations, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to San Diego Intl. Airport (SAN)?
You can usually cancel or reschedule your SFO to SAN flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.