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 $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

Wed, May 6 - Wed, May 13

1:50 pm - 3:39 pm

SFO

SAN

1h 49mnonstop

7:15 am - 9:01 am

SAN

SFO

1h 46mnonstop

$117United 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, May 1 - Wed, May 13

8:45 pm - 10:37 pm

SFO

SAN

1h 52mnonstop

7:15 am - 9:01 am

SAN

SFO

1h 46mnonstop

$137United Airlines

Fri, May 1 - Sat, May 2

10:40 pm - 12:28 am

SFO

SAN

1h 48mnonstop

6:20 am - 8:08 am

SAN

SFO

1h 48mnonstop

$147United Airlines

Wed, May 20 - Mon, May 25

3:49 pm - 5:19 pm

DEN

SAN

2h 30mnonstop

6:35 am - 10:08 am

SAN

DEN

2h 33mnonstop

$153United Airlines

Fri, May 1 - Fri, May 1

6:30 am - 8:04 am

SFO

SAN

1h 34mnonstop

4:26 pm - 6:09 pm

SAN

SFO

1h 43mnonstop

$157United Airlines

Sat, May 2 - Sun, May 3

6:30 am - 8:04 am

SFO

SAN

1h 34mnonstop

6:20 am - 8:08 am

SAN

SFO

1h 48mnonstop

$164United Airlines

Wed, May 6 - Sat, May 9

12:34 pm - 5:24 pm

SEA

SAN

4h 50m

1 stop

1:35 pm - 9:06 pm

SAN

SEA

7h 31m

1 stop

$166United Airlines

Sun, May 24 - Fri, May 29

4:25 pm - 7:47 pm

SFO

SAN

3h 22m

1 stop

11:01 am - 12:47 pm

SAN

SFO

1h 46mnonstop

$167United Airlines

Fri, May 1 - Sat, May 2

7:05 pm - 11:59 pm

SFO

SAN

4h 54m

1 stop

11:04 am - 12:50 pm

SAN

SFO

1h 46mnonstop

$170United Airlines

Useful Info

Low season	December
High season	March
Cheapest flight	$69
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

Good9,562 verified ratings

8.1Crew

7.3Comfort

7.7Boarding

6.6Food

7.1Entertainment

10.0 Wonderful

Dr. Joseph, Apr 2026

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

2.0 Poor

Dr. Joseph, Apr 2026

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

2.0 Poor

Aaron, Apr 2026

Poor communication, flight was delayed for preventable reasons. I missed my connection.

10.0 Wonderful

Corrine, Apr 2026

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

4.0 Mediocre

Allison, Apr 2026

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

10.0 Wonderful

Anonymous, Apr 2026

Perfect!

10.0 Wonderful

George, Apr 2026

The crew was generally professional. Though one of the crew members seemed to be easily annoyed, the others were fine and helpful. The green olives and almonds snack was really good. A great idea, and nice balance of tastes.

6.0 Okay

Anonymous, Apr 2026

It as confusing with the connections and I almost missed my next flight because of the first delay with the first flight. United could have helped passengers go through immigration quicker rather than waiting with everyone else. The flight attendants were super friendly and lovely. The vegetarian food was awful- I did not finish. I would suggest they just do pasta next time

10.0 Wonderful

John, Apr 2026

All good flight was 35 minutes early when arriving in Edinburgh

8.0 Very good

John, Apr 2026

Flights were on time actually early service was good and crew cheerful

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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.

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