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

With an average return price of $404, 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 $216.

Which other airlines fly to San Diego?

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

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 $404 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

Thu, Jan 22 - Sun, Jan 25

1:37 pm - 3:04 pm

DEN

SAN

2h 27mnonstop

9:00 am - 12:30 pm

SAN

DEN

2h 30mnonstop

$117United Airlines

Mon, Jan 26 - Tue, Jan 27

7:00 am - 8:37 am

SFO

SAN

1h 37mnonstop

4:00 pm - 5:46 pm

SAN

SFO

1h 46mnonstop

$117United Airlines

Thu, Jan 22 - Mon, Jan 26

11:06 am - 12:49 pm

SFO

SAN

1h 43mnonstop

6:15 am - 12:00 pm

SAN

SFO

5h 45m1 stop

$123United Airlines

Fri, May 8 - Sun, May 10

10:40 pm - 12:28 am

SFO

SAN

1h 48mnonstop

6:20 am - 8:08 am

SAN

SFO

1h 48mnonstop

$131United Airlines

Sat, Jan 24 - Sat, Jan 31

6:53 pm - 11:42 pm

SFO

SAN

4h 49m1 stop

7:45 am - 9:34 am

SAN

SFO

1h 49mnonstop

$137United Airlines

Thu, Jan 22 - Sun, Jan 25

6:00 am - 10:27 am

SFO

SAN

4h 27m1 stop

6:15 am - 8:00 am

SAN

SFO

1h 45mnonstop

$142United Airlines

Thu, Jan 22 - Mon, Jan 26

4:20 pm - 7:54 pm

SFO

SAN

3h 34m1 stop

6:15 am - 12:00 pm

SAN

SFO

5h 45m1 stop

$147United Airlines

Sat, Feb 7 - Mon, Feb 9

6:00 am - 10:27 am

SFO

SAN

4h 27m1 stop

6:15 am - 12:00 pm

SAN

SFO

5h 45m1 stop

$150United Airlines

Fri, Feb 20 - Mon, Feb 23

10:50 pm - 12:29 am

SFO

SAN

1h 39mnonstop

6:10 pm - 11:04 pm

SAN

SFO

4h 54m1 stop

$152United Airlines

Sat, Feb 14 - Thu, Feb 19

10:50 pm - 12:29 am

SFO

SAN

1h 39mnonstop

6:15 am - 8:05 am

SAN

SFO

1h 50mnonstop

$153United Airlines

Useful Info

Low season	August
High season	March
Cheapest flight	$59
Average price round-trip	$405
Good deal one-way	$449

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 2% 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 $404, 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 $216.
Which other airlines fly to San Diego?
Along with United Airlines, you can also fly to San Diego with Southwest, Alaska Airlines, Delta, Delta, Alaska Airlines, Breeze Airways, Breeze Airways, American Airlines and Frontier.
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 $404 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 Newark Airport and cost $227.
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 August.

7.4

Good9,118 verified ratings

7.3Comfort

6.6Food

7.7Boarding

8.1Crew

7.1Entertainment

Pros +

Flight was quick and easy. (in 2447 reviews)
"Clean plane, organized crew." (in 2084 reviews)

Show reviews that mention

10.0 Wonderful

Sandra, Dec 2025

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

10.0 Wonderful

Suzette, Dec 2025

Bedt ever

6.0 Okay

Marco, Dec 2025

cabin crew was OK, food was OK, the trip from the US to Munich was actually pretty bad comfort wise. Noisy aircraft, lights never dimmed even in Business class (night flight) barely sufficient amenities for the price. I have millions of miles with United but TBH American is gaining ground and Delta has always been marginally better then United although on paper United has more longes and cheaper upgrades.

4.0 Mediocre

Marco, Dec 2025

An international flight on an apron is pretty unusual in my 40 years of traveling. Departure delay. Luggage despite over an hour connection did not make it to the flight. Actually still in Germany. My luggage was not moved until I reached my final destination despite knowing it to be left in Germany upon my arrival in Chicago. The service left me a little off, both going and returning from Europe. Light on in the cabin even during a night flight and lots of traffic no matter what. Maybe passengers want more service? As a frequent traveler i just want to be able to sleep, the food will be better at the destination anyway. So since the cabin crew woke me up I asked for a cocktail, I did not get the best response although sitting in row 20 premium economy. I usually fly premium economy or business and my 2 flight to Europe in 2025 with United both had luggage delays and other minor issues. American flights to Australia, Canada and Europe went smoothly and Premium plus feels very much like business light. Is United Club becoming a waste and Silver/Gold levels another waste??

6.0 Okay

Walter, Dec 2025

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

4.0 Mediocre

Jay, Dec 2025

Essy to get on. The hostess gave very little pop, the plane was late getting in, and we are still waiting for our bags. This sucks. :/

10.0 Wonderful

Mario, Dec 2025

It was good, although we could not get our preferred seats, we did enjoy the whole experience from Costa Rica. I still don't understand why our luggage is not the first to come out at the band.

10.0 Wonderful

Anonymous, Dec 2025

Sat next to a one year old. She crawled all over the place and made me laugh.

2.0 Poor

jbritto, Dec 2025

Not United Airlines' fault. It's ORL airport's fault.

10.0 Wonderful

Dr. Joseph, Dec 2025

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

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Find cheap United Airlines flights to San Diego from $59

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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 $404, 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 $216.

Which other airlines fly to San Diego?

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

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 $404 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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