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

With an average return price of $406, 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 $261.

Which other airlines fly to San Diego?

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

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

On average, United Airlines flights to San Diego cost $277 for one-way and $406 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 $69

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 30 - Sat, Jun 6

10:42 pm - 12:30 am

SFO

SAN

1h 48mnonstop

1:39 pm - 3:19 pm

SAN

SFO

1h 40mnonstop

$137United Airlines

Wed, May 27 - Wed, May 27

6:00 am - 10:08 am

SFO

SAN

4h 08m

1 stop

7:41 pm - 9:28 pm

SAN

SFO

1h 47mnonstop

$147United Airlines

Fri, May 29 - Mon, Jun 1

9:00 pm - 10:25 pm

DEN

SAN

2h 25mnonstop

6:35 am - 10:08 am

SAN

DEN

2h 33mnonstop

$157United Airlines

Sat, May 30 - Sat, Jun 6

6:45 pm - 11:54 pm

SFO

SAN

5h 09m

1 stop

6:20 am - 10:45 am

SAN

SFO

4h 25m

1 stop

$157United Airlines

Sat, Jun 6 - Sun, Jun 7

7:45 pm - 11:54 pm

SFO

SAN

4h 09m

1 stop

6:12 am - 7:56 am

SAN

SFO

1h 44mnonstop

$167United Airlines

Sat, May 30 - Sat, May 30

6:00 am - 10:08 am

SFO

SAN

4h 08m

1 stop

6:27 pm - 8:07 pm

SAN

SFO

1h 40mnonstop

$168United Airlines

Thu, May 28 - Sat, May 30

9:00 pm - 10:25 pm

DEN

SAN

2h 25mnonstop

8:45 am - 12:17 pm

SAN

DEN

2h 32mnonstop

$170United Airlines

Wed, Jun 10 - Wed, Jun 10

6:00 am - 10:08 am

SFO

SAN

4h 08m

1 stop

4:09 pm - 5:49 pm

SAN

SFO

1h 40mnonstop

$171United Airlines

Fri, May 22 - Sat, May 23

10:42 pm - 12:30 am

SFO

SAN

1h 48mnonstop

9:07 am - 10:53 am

SAN

SFO

1h 46mnonstop

$172United Airlines

Wed, May 27 - Sun, May 31

7:43 am - 9:05 am

DEN

SAN

2h 22mnonstop

6:30 am - 10:03 am

SAN

DEN

2h 33mnonstop

$177United Airlines

Useful Info

Low season	December
High season	May
Cheapest flight	$69
Average price round-trip	$408
Good deal round-trip	$347
Good deal one-way	$665

Best time to beat the crowds but there is an average 16% increase in price.

Most popular time to fly and prices are also 5% lower on average.

Flight from San Francisco 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 $406, 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 $261.
Which other airlines fly to San Diego?
Along with United Airlines, you can also fly to San Diego with Southwest, Delta, Delta, Alaska Airlines, Breeze Airways, Breeze Airways, Alaska Airlines, Frontier and American Airlines.
How much is a flight to San Diego with United Airlines?
On average, United Airlines flights to San Diego cost $277 for one-way and $406 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 $134.
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 May and prices are highest at this time. The cheapest month to fly is December.

7.4

Good9,681 verified ratings

7.1Entertainment

7.7Boarding

6.6Food

7.3Comfort

8.1Crew

4.0 Mediocre

Anonymous, May 2026

good crew but no good choice for food

10.0 Wonderful

Eirene, May 2026

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

10.0 Wonderful

Eirene, May 2026

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

8.0 Very good

LILLY, May 2026

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

6.0 Okay

Anonymous, May 2026

Seats were not super comfortable and food was not good at all. If I had a chance I would definitely fly a different airline. Of course they are better than any budget airline, but not by much.

6.0 Okay

Anonymous, May 2026

too small seat and food was terrable

8.0 Very good

Jason, May 2026

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

8.0 Very good

Marianne, May 2026

Very friendly and helpful staff on board and United was excellent when I missed my onward flight due to the delay in London. Very well organised meant much less stress

10.0 Wonderful

HL, Apr 2026

Three times meal served, fast return without drama

6.0 Okay

Anonymous, Apr 2026

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

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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 $406, 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 $261.

Which other airlines fly to San Diego?

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

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

On average, United Airlines flights to San Diego cost $277 for one-way and $406 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.

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