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

With an average return price of $389, 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 $228.

Which other airlines fly to San Diego?

Along with United Airlines, you can also fly to San Diego with Southwest, Delta, Alaska Airlines, Alaska Airlines, American Airlines, Frontier, 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 $265 for one-way and $389 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 $55

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 - Sat, Jan 17

5:05 pm - 6:44 pmSFO-SAN

1h 39mnonstop

9:55 am - 11:44 amSAN-SFO

1h 49mnonstop

$109United Airlines

Find Deal

Mon, Feb 9 - Mon, Feb 9

7:00 am - 8:37 amSFO-SAN

1h 37mnonstop

7:52 pm - 9:39 pmSAN-SFO

1h 47mnonstop

$117United Airlines

Find Deal

Thu, Mar 5 - Sun, Mar 8

7:00 am - 8:40 amSFO-SAN

1h 40mnonstop

6:15 am - 8:05 amSAN-SFO

1h 50mnonstop

$132United Airlines

Find Deal

Sat, Dec 13 - Tue, Dec 16

4:50 pm - 6:28 pmSFO-SAN

1h 38mnonstop

8:00 pm - 9:42 pmSAN-SFO

1h 42mnonstop

$137United Airlines

Find Deal

Sat, Dec 13 - Tue, Jan 13

7:10 pm - 8:48 pmSFO-SAN

1h 38mnonstop

7:45 am - 9:34 amSAN-SFO

1h 49mnonstop

$147United Airlines

Find Deal

Tue, Dec 30 - Thu, Jan 8

10:45 pm - 12:15 amSFO-SAN

1h 30mnonstop

7:52 pm - 9:39 pmSAN-SFO

1h 47mnonstop

$157United Airlines

Find Deal

Sat, Jan 24 - Sat, Jan 31

5:05 pm - 6:44 pmSFO-SAN

1h 39mnonstop

6:15 am - 12:00 pmSAN-SFO

5h 45m1 stop

$163United Airlines

Find Deal

Sun, Jan 11 - Sun, Jan 18

7:57 pm - 10:33 pmORD-SAN

4h 36mnonstop

4:47 pm - 10:59 pmSAN-ORD

4h 12mnonstop

$165United Airlines

Find Deal

Tue, Jan 6 - Fri, Jan 9

7:10 am - 9:40 amORD-SAN

4h 30mnonstop

2:11 pm - 8:25 pmSAN-ORD

4h 14mnonstop

$167United Airlines

Find Deal

Thu, Jan 29 - Sun, Feb 1

6:00 am - 10:27 amSFO-SAN

4h 27m1 stop

9:55 am - 11:44 amSAN-SFO

1h 49mnonstop

$167United Airlines

Find Deal

Useful Info

Low season	August
High season	April
Cheapest flight	$55
Average price round-trip	$384

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

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

Flight from San Francisco to San Diego

(price for this month)

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 $389, 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 $228.
Which other airlines fly to San Diego?
Along with United Airlines, you can also fly to San Diego with Southwest, Delta, Alaska Airlines, Alaska Airlines, American Airlines, Frontier, 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 $265 for one-way and $389 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 $99.
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 December and prices are highest at this time. The cheapest month to fly is August.

7.4

Good9,065 verified ratings

6.6Food

7.1Entertainment

7.3Comfort

8.1Crew

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

8.0 Very good

Shelley, Dec 2025

Flight process

10.0 Wonderful

Anonymous, Dec 2025

on time

8.0 Very good

t, Dec 2025

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

2.0 Poor

Salwa, Dec 2025

Very bad!

2.0 Poor

Salwa, Dec 2025

Very bad! They kept delaying my flight and wouldn’t do anything about it

2.0 Poor

John, Nov 2025

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

8.0 Very good

Anonymous, Nov 2025

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

8.0 Very good

Maurice, Nov 2025

Flight and crew were great. United didn't inform crew of immigration process which was disappointing!

10.0 Wonderful

Michael, Nov 2025

Flight team stood out for perzonal attention, kindness at bright cheery attitudes at 8am. Very helpful.

10.0 Wonderful

t, Nov 2025

On time

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Find cheap United Airlines flights to San Diego from $55

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?

Which other airlines fly to San Diego?

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

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

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

Top tips for your flights to San Diego with United Airlines

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