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

With an average return price of $355, United Airlines is cheaper than Breeze Airways and Alaska Airlines when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $218.

Which other airlines fly to San Diego?

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

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

On average, United Airlines flights to San Diego cost $447 for one-way and $355 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

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, May 16 - Tue, May 19

7:40 pm - 9:12 pm

DEN

SAN

2h 32mnonstop

6:32 am - 10:09 am

SAN

DEN

2h 37mnonstop

$117United Airlines

Sat, May 2 - Sat, May 9

4:41 pm - 6:33 pm

SFO

SAN

1h 52mnonstop

1:35 pm - 3:21 pm

SAN

SFO

1h 46mnonstop

$117United Airlines

Fri, Apr 24 - Sat, Apr 25

8:45 pm - 10:38 pm

SFO

SAN

1h 53mnonstop

9:46 am - 11:32 am

SAN

SFO

1h 46mnonstop

$127United Airlines

Sat, May 9 - Sat, May 16

6:30 am - 8:04 am

SFO

SAN

1h 34mnonstop

1:35 pm - 3:21 pm

SAN

SFO

1h 46mnonstop

$128United Airlines

Thu, Apr 30 - Sun, May 3

8:46 pm - 10:16 pm

DEN

SAN

2h 30mnonstop

6:32 am - 10:09 am

SAN

DEN

2h 37mnonstop

$137United Airlines

Fri, Apr 24 - Sun, Apr 26

8:45 pm - 10:38 pm

SFO

SAN

1h 53mnonstop

6:36 am - 8:24 am

SAN

SFO

1h 48mnonstop

$137United Airlines

Fri, Apr 24 - Sun, Apr 26

6:00 am - 10:20 am

SFO

SAN

4h 20m

1 stop

6:36 am - 8:24 am

SAN

SFO

1h 48mnonstop

$147United Airlines

Sat, Apr 25 - Sun, Apr 26

7:45 am - 9:16 am

DEN

SAN

2h 31mnonstop

6:32 am - 10:09 am

SAN

DEN

2h 37mnonstop

$152United Airlines

Fri, Apr 24 - Sat, Apr 25

6:00 am - 10:20 am

SFO

SAN

4h 20m

1 stop

6:22 pm - 8:05 pm

SAN

SFO

1h 43mnonstop

$157United Airlines

Sat, May 9 - Sat, May 16

7:05 pm - 11:59 pm

SFO

SAN

4h 54m

1 stop

1:35 pm - 3:21 pm

SAN

SFO

1h 46mnonstop

$158United Airlines

Useful Info

Low season	December
High season	March
Cheapest flight	$59
Average price round-trip	$382
Good deal round-trip	$324

Best time to beat the crowds but there is an average 17% 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 $355, United Airlines is cheaper than Breeze Airways and Alaska Airlines when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $218.
Which other airlines fly to San Diego?
Along with United Airlines, you can also fly to San Diego with Southwest, Alaska Airlines, Alaska Airlines, Breeze Airways, Delta, American Airlines, Frontier, Breeze Airways and Delta.
How much is a flight to San Diego with United Airlines?
On average, United Airlines flights to San Diego cost $447 for one-way and $355 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 $90.
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 March and prices are highest at this time. The cheapest month to fly is December.

7.4

Good9,546 verified ratings

7.1Entertainment

8.1Crew

7.3Comfort

7.7Boarding

6.6Food

2.0 Poor

Anonymous, Apr 2026

Somebody entered our names incorrectly so it didn't match our passports. KAYAK first time... never again. Boarding passes and security took so much time to correct. Massive stress: both names messed up. Know we entered correctly via screen shot. Very troublesome. Never took a United airlines or planes as Kauak booked It was so messed up.

10.0 Wonderful

Jude, Apr 2026

Great

6.0 Okay

Anonymous, Apr 2026

Food and drink service was very low quality. The flight attendants in business class must have been short some staff. Service was sluggish and not much English was spoken

10.0 Wonderful

Mitchell, Apr 2026

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

6.0 Okay

Anonymous, Apr 2026

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

4.0 Mediocre

Anonymous, Apr 2026

The flight was officially delayed 3 times, and was actually later than that. Combined, it was a 3 hour delay, but there was no recognition (miles, voucher, etc). The crew seemed stressed. The captain sounded nervous in his announcements. The flight itself was smooth and uneventful.

2.0 Poor

Harry, Apr 2026

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

10.0 Wonderful

Nan, Apr 2026

Great until we got to FRA. The next trip leg we were put in Business Class where seats had minimal padding!!!! They were awful and United Airlines needs to have their Lufthansa partner up their game or I won’t fly with them again!!

4.0 Mediocre

Anonymous, Apr 2026

Food was awful. TV didn’t work for long haul flight and my husband needed credit. Staff was nice and did their best but overall conditions were very uncomfortable.

6.0 Okay

Mel, Apr 2026

I had a good time. However, I paid for the wifi and it was in and out the whole flight.

Everything you need to know for your flight to San Diego

Airlines

Airports

Cabin class

Complete your trip

Flights to other cities

Origins

Other airports

United Airlines flights

Other airlines flying to San Diego

Frontier flights to San Diego

Alaska Airlines flights to San Diego

Southwest flights to San Diego

Delta flights to San Diego

American Airlines flights to San Diego

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 $355, United Airlines is cheaper than Breeze Airways and Alaska Airlines when it comes to flights to San Diego. However, the cheapest airline flying to San Diego is Frontier, with an average return price of $218.

Which other airlines fly to San Diego?

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

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

On average, United Airlines flights to San Diego cost $447 for one-way and $355 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

Traveler rating:

Sort by:

Everything you need to know for your flight to San Diego

Other airlines flying to San Diego

Information on the airport you'll fly into in San Diego

Cabin class types available on flights to San Diego

Complete your trip to San Diego with a hotel stay or car rental

Flights to other popular destinations

Flights from domestic origins to San Diego

Choose which airport to fly into in San Diego

Top United Airlines flights