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

Flying on Frontier is currently your cheapest option to San Diego, with prices starting at $28. Another option worth looking into is American Airlines, starting at $186 round trip. These flights start at 83% lower than the current average price 3 months from now.

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

Travelers seeking maximum savings on their San Francisco to San Diego flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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

Friday is generally a great day to depart. Flying on this day could help you save up to 164%.

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

Find a great deal and save up to 96% by booking at least 31 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to San Diego within the next two weeks, with the cheapest ticket starting at $131.

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

January is one of the best times of the year to fly to San Diego from San Francisco. Prices for January average $139 per person but you can even find prices for as low as $36. The most expensive prices can be found in the month of August. Opting for a January flight can save you 24% on your journey compared to booking in August

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.

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Cheap flight deals from San Francisco to San Diego

Popular in	April
Cheapest in	May
Average price	$153

Highest demand for flights based on searches. 31% potential increase in price ($75 potential increase over avg. RT price).

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Cheapest flight prices on average. 17% potential price decrease ($26 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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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

What is the cheapest time of day to fly from SFO to CLD?

Unlike at noon, when flights are generally more expensive, you can save up to 50% on flights from San Francisco to San Diego by exploring options for tickets in the afternoon.

Reviews of airlines servicing San Diego

Peruse reviews from past customers who have flown with American Airlines and Frontier 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.

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

2.0

Mediocre

Damon,Oct 2024

SFO - ORD

Plane took off 40 minutes late with no explanation. Missed connection.

American Airlines

7.2

Good

10,000 reviews

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

2.0

Mediocre

Damon,Oct 2024

SFO - ORD

Plane took off 40 minutes late with no explanation. Missed connection.

Frontier

5.8

Fair

3,177 reviews

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

2.0

Mediocre

Damon,Oct 2024

SFO - ORD

Plane took off 40 minutes late with no explanation. Missed connection.

Related info for your journey

What are the cheapest airlines flying from San Francisco to San Diego round-trip?
Flying on Frontier is currently your cheapest option to San Diego, with prices starting at $28. Another option worth looking into is American Airlines, starting at $186 round trip. These flights start at 83% lower than the current average price 3 months from now.
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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from San Francisco to San Diego

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$28	Average$78	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$186	Average$253	FlexibilityNo cancel fee	On-time71%

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Find cheap flights from San Francisco to San Diego with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from San Francisco to San Diego

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to San Diego

What is the cheapest time of day to fly from SFO to CLD?

Reviews of airlines servicing San Diego

Peruse reviews from past customers who have flown with American Airlines and Frontier 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.

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

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

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

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

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 San Francisco to San Diego

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Complete your trip

Complete your trip to San Diego by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from San Francisco to San Diego by cabin class

Find flights from San Francisco to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.

San Francisco and San Diego flights

Browse other San Francisco and San Diego flight options. Last updated on September 11, 2025.

Other flights from San Francisco

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Top 2 airlines flying from San Francisco to San Diego

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Cheap flights from San Francisco to San Diego (SFO - CLD)

Find cheap flights from San Francisco to San Diego with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from San Francisco to San Diego

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to San Diego

What is the cheapest time of day to fly from SFO to CLD?

Reviews of airlines servicing San Diego

Peruse reviews from past customers who have flown with American Airlines and Frontier 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.

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

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

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

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

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 San Francisco to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from San Francisco to San Diego

100% Free

Book with Flexibility

Travel Smart