Is United Airlines cheaper than other airlines flying to San Diego?

With an average return price of $391, United Airlines is cheaper than Delta when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $231.

Which other airlines fly to San Diego?

Along with United Airlines, you can also fly to San Diego with Southwest, Alaska Airlines, Alaska Airlines, American Airlines, Frontier, Delta, Delta, Breeze Airways and Breeze Airways.

How much is a flight to San Diego with United Airlines?

On average, United Airlines flights to San Diego cost $304 for one-way and $391 return.

Which airport do United Airlines flights to San Diego fly into?

You’ll fly into San Diego Airport when flying to San Diego with United Airlines.

Are there any other airlines in Star Alliance that fly to San Diego?

Unfortunately, there are no other airlines in Star Alliance that fly to San Diego.

United Airlines flights to San Diego (SAN) from $59

Flight Deals

Cheap United Airlines Flight Deals to San Diego

Here are some of the best deals found on KAYAK recently from United Airlines to San Diego that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals to San Diego

Sat, Jan 10 - Tue, Jan 13

1:37 pm - 3:04 pm

DEN

SAN

2h 27mnonstop

1:00 pm - 4:31 pm

SAN

DEN

2h 31mnonstop

$117United Airlines

Tue, Jan 6 - Tue, Jan 13

7:00 am - 8:37 am

SFO

SAN

1h 37mnonstop

7:45 am - 9:34 am

SAN

SFO

1h 49mnonstop

$117United Airlines

Sat, Jan 10 - Sat, Jan 17

7:00 am - 8:37 am

SFO

SAN

1h 37mnonstop

6:15 am - 12:00 pm

SAN

SFO

5h 45m1 stop

$123United Airlines

Fri, Jan 23 - Tue, Jan 27

7:45 am - 9:20 am

DEN

SAN

2h 35mnonstop

11:10 am - 2:41 pm

SAN

DEN

2h 31mnonstop

$127United Airlines

Sat, Feb 14 - Wed, Feb 18

10:50 pm - 12:29 am

SFO

SAN

1h 39mnonstop

5:55 pm - 7:42 pm

SAN

SFO

1h 47mnonstop

$127United Airlines

Sat, Jan 17 - Sun, Jan 18

1:13 pm - 2:52 pm

SFO

SAN

1h 39mnonstop

6:15 am - 8:00 am

SAN

SFO

1h 45mnonstop

$132United Airlines

Fri, Jan 9 - Mon, Jan 12

9:05 pm - 10:37 pm

DEN

SAN

2h 32mnonstop

6:30 am - 10:01 am

SAN

DEN

2h 31mnonstop

$137United Airlines

Tue, Mar 17 - Sun, Mar 22

4:50 pm - 6:33 pm

SFO

SAN

1h 43mnonstop

6:15 am - 8:05 am

SAN

SFO

1h 50mnonstop

$137United Airlines

Sun, Jan 18 - Tue, Jan 20

4:19 pm - 7:54 pm

SFO

SAN

3h 35m1 stop

9:55 am - 11:44 am

SAN

SFO

1h 49mnonstop

$142United Airlines

Wed, Mar 4 - Mon, Mar 9

1:11 pm - 2:49 pm

SFO

SAN

1h 38mnonstop

9:54 am - 11:44 am

SAN

SFO

1h 50mnonstop

$146United Airlines

Useful Info

Low season	January
High season	April
Cheapest flight	$59
Average price round-trip	$401
Good deal one-way	$462

Best time to beat the crowds with an average 14% drop in price.

Most popular time to fly with an average 5% increase in price.

Flight from Denver to San Diego

(avg. price over the last 2 weeks)

or less

When to book flights with United Airlines to San Diego

Average price per month

Flight prices as travel date approaches

Is United Airlines cheaper than other airlines flying to San Diego?
With an average return price of $391, United Airlines is cheaper than Delta when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $231.
Which other airlines fly to San Diego?
Along with United Airlines, you can also fly to San Diego with Southwest, Alaska Airlines, Alaska Airlines, American Airlines, Frontier, Delta, Delta, Breeze Airways and Breeze Airways.
How much is a flight to San Diego with United Airlines?
On average, United Airlines flights to San Diego cost $304 for one-way and $391 return.
Which airport do United Airlines flights to San Diego fly into?
You’ll fly into San Diego Airport when flying to San Diego with United Airlines.
Are there any other airlines in Star Alliance that fly to San Diego?
Unfortunately, there are no other airlines in Star Alliance that fly to San Diego.

The cheapest flight to San Diego with United Airlines found on KAYAK in the last 2 weeks departed from Houston George Bush Intcntl Airport and cost $185.
If you’re intending to fly with United Airlines, book your flight to San Diego at least 2 weeks before departure to ensure a below-average price.
High season for flights to San Diego with United Airlines is April and prices are highest at this time. The cheapest month to fly is August.

7.4

Good9,094 verified ratings

7.1Entertainment

6.6Food

8.1Crew

7.3Comfort

7.7Boarding

Pros +

Flight was quick and easy. (in 2447 reviews)

Cons -

Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)
Also no entertainment (in 1245 reviews)

Show reviews that mention

6.0 Okay

Sue, Dec 2025

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

10.0 Wonderful

Bill, Dec 2025

Staff on board was excellent. Positive upbeat helpful- like it used to be.

8.0 Very good

Eurico Hiromitsu, Dec 2025

Razoavel

8.0 Very good

Eurico Hiromitsu, Dec 2025

Razoavel

10.0 Wonderful

Michele, Dec 2025

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

4.0 Mediocre

David, Dec 2025

For an expensive flight to another country, United has a lot of nerve serving pretzels and no meals (unless, of course, you want to buy something to eat). Unacceptable.

8.0 Very good

Steven, Dec 2025

The seats are not comfortable and cramped

10.0 Wonderful

Anonymous, Dec 2025

It was great. No change

2.0 Poor

Thrinadh Kumar, Dec 2025

Flight delayed alot

4.0 Mediocre

Thrinadh Kumar, Dec 2025

Flight delayed than usual time

Everything you need to know for your flight to San Diego

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Frontier flights to San Diego

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SAN

Find cheap United Airlines flights to San Diego from $59

Search hundreds of travel sites at once for deals on United Airlines flights to San Diego

Cheap United Airlines Flight Deals to San Diego

Recent round-trip United Airlines flight deals to San Diego

Recent one-way United Airlines flight deals to San Diego

Recent last minute United Airlines flight deals to San Diego

Recent direct United Airlines flight deals to San Diego

Good to know

When to book flights with United Airlines to San Diego

FAQs for flying to San Diego with United Airlines

Is United Airlines cheaper than other airlines flying to San Diego?

With an average return price of $391, United Airlines is cheaper than Delta when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $231.

Which other airlines fly to San Diego?

Along with United Airlines, you can also fly to San Diego with Southwest, Alaska Airlines, Alaska Airlines, American Airlines, Frontier, Delta, Delta, Breeze Airways and Breeze Airways.

How much is a flight to San Diego with United Airlines?

On average, United Airlines flights to San Diego cost $304 for one-way and $391 return.

Which airport do United Airlines flights to San Diego fly into?

You’ll fly into San Diego Airport when flying to San Diego with United Airlines.

Are there any other airlines in Star Alliance that fly to San Diego?

Unfortunately, there are no other airlines in Star Alliance that fly to San Diego.

Top tips for your flights to San Diego with United Airlines

United Airlines customer reviews

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Everything you need to know for your flight to San Diego

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Choose which airport to fly into in San Diego

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