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Cheap flights from the United States to San Diego from $39

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to San Diego departing on 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United States to San Diego

Recent round-trip flight deals from the United States to San Diego

Enter your travel dates to find the best prices.
Frontier Logo
10:29 pm - 12:08 am
DEN
-
SAN
2h 39mnonstop
Frontier Logo
9:18 pm - 12:47 am
SAN
-
DEN
2h 29mnonstop
$56Frontier
Thu, Mar 26 - Mon, Mar 30
Frontier Logo
10:29 pm - 12:08 am
DEN
-
SAN
2h 39mnonstop
Frontier Logo
9:18 pm - 12:47 am
SAN
-
DEN
2h 29mnonstop
$61Frontier
Sun, Mar 29 - Mon, Mar 30
Southwest Logo
4:40 pm - 9:40 pm
SFO
-
SAN
5h 00m
1 stop
Southwest Logo
10:30 am - 5:15 pm
SAN
-
SFO
6h 45m
1 stop
$117Southwest
Sat, Feb 28 - Sat, Mar 7
Southwest Logo
6:20 am - 5:45 pm
SFO
-
SAN
11h 25m
2 stops
Southwest Logo
2:25 pm - 4:10 pm
SAN
-
SFO
1h 45mnonstop
$118Southwest
Wed, Apr 22 - Sat, Apr 25
Alaska Airlines Logo
8:20 am - 11:09 am
ORD
-
SAN
4h 49mnonstop
Alaska Airlines Logo
5:42 pm - 11:59 pm
SAN
-
ORD
4h 17mnonstop
$167Alaska Airlines
Tue, Mar 3 - Mon, Mar 9
Alaska Airlines Logo
4:46 pm - 8:02 pm
JFK
-
SAN
6h 16mnonstop
Alaska Airlines Logo
9:25 pm - 6:03 am
SAN
-
JFK
5h 38mnonstop
$212Alaska Airlines
Fri, Apr 24 - Fri, Apr 24
American Airlines Logo
3:55 pm - 10:34 pm
BOS
-
SAN
9h 39m
1 stop
American Airlines Logo
10:35 pm - 10:46 am
SAN
-
BOS
9h 11m
1 stop
$223American Airlines
Sat, Feb 21 - Wed, Feb 25
Delta Logo
5:05 pm - 8:45 pm
BOS
-
SAN
6h 40mnonstop
Delta Logo
9:55 pm - 6:25 am
SAN
-
BOS
5h 30mnonstop
$227Delta
Sat, Feb 21 - Wed, Feb 25
American Airlines Logo
2:36 pm - 10:23 pm
BOS
-
SAN
10h 47m
1 stop
American Airlines Logo
10:35 pm - 9:54 am
SAN
-
BOS
8h 19m
1 stop
$228American Airlines
Wed, Mar 11 - Tue, Mar 17
Delta Logo
5:30 pm - 9:07 pm
BOS
-
SAN
6h 37mnonstop
Delta Logo
10:03 pm - 6:25 am
SAN
-
BOS
5h 22mnonstop
$237Delta
Tue, Mar 17 - Tue, Mar 24

Delta flights from United States to San Diego

Our best Delta deals on United States to San Diego flight tickets
Delta
Apr 18
SFO5:50 pmSan Francisco
4h 56m
1 stop
SAN10:46 pmSan Diego
Apr 22
SAN7:12 pmSan Diego
4h 47m
1 stop
SFO11:59 pmSan Francisco
$157
Delta
Feb 21
SEA7:35 pmSeattle/Tacoma Intl
2h 45m
SAN10:20 pmSan Diego
Feb 25
SAN10:59 amSan Diego
3h 16m
SEA2:15 pmSeattle/Tacoma Intl
$176
Delta
Feb 26
SEA7:15 amSeattle/Tacoma Intl
2h 49m
SAN10:04 amSan Diego
Feb 28
SAN7:20 amSan Diego
3h 16m
SEA10:36 amSeattle/Tacoma Intl
$177

Frontier flights from United States to San Diego

Our best Frontier deals on United States to San Diego flight tickets
Frontier
Mar 26
DEN10:29 pmDenver Intl
2h 39m
SAN12:08 amSan Diego
Mar 30
SAN9:18 pmSan Diego
2h 29m
DEN12:47 amDenver Intl
$56
Frontier
Mar 29
DEN10:29 pmDenver Intl
2h 39m
SAN12:08 amSan Diego
Mar 30
SAN9:18 pmSan Diego
2h 29m
DEN12:47 amDenver Intl
$61
Frontier
Feb 10
DEN8:00 pmDenver Intl
2h 41m
SAN9:41 pmSan Diego
Feb 26
SAN6:25 amSan Diego
2h 35m
DEN10:00 amDenver Intl
$62

momondo Fare Finder

 
Customize your flight search to find flights from United States to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 2, 2026.
Use the filters below to find and compare flights from the United States to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Thu 3/26

10:29 pm-12:08 am

Nonstop2h 39m

San Diego

Mon 3/30

9:18 pm-12:47 am

Nonstop2h 29m

$56

DenverSan Diego

DEN - SAN

DENSAN

Denver Intl

Sun 3/29

10:29 pm-12:08 am

Nonstop2h 39m

San Diego

Mon 3/30

9:18 pm-12:47 am

Nonstop2h 29m

$61

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sat 2/28

4:40 pm-9:40 pm

1 stop5h 00m

San Diego

Sat 3/7

10:30 am-5:15 pm

1 stop6h 45m

$117

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Wed 4/22

6:20 am-5:45 pm

2 stops11h 25m

San Diego

Sat 4/25

2:25 pm-4:10 pm

Nonstop1h 45m

$118

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 3/3

8:20 am-11:09 am

Nonstop4h 49m

San Diego

Mon 3/9

5:42 pm-11:59 pm

Nonstop4h 17m

$167

New YorkSan Diego

JFK - SAN

JFKSAN

New York John F Kennedy Intl

Fri 4/24

4:46 pm-8:02 pm

Nonstop6h 16m

San Diego

Fri 4/24

9:25 pm-6:03 am

Nonstop5h 38m

$212

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 2/21

3:55 pm-10:34 pm

1 stop9h 39m

San Diego

Wed 2/25

10:35 pm-10:46 am

1 stop9h 11m

$223

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Sat 2/21

5:05 pm-8:45 pm

Nonstop6h 40m

San Diego

Wed 2/25

9:55 pm-6:25 am

Nonstop5h 30m

$227

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Wed 3/11

2:36 pm-10:23 pm

1 stop10h 47m

San Diego

Tue 3/17

10:35 pm-9:54 am

1 stop8h 19m

$228

BostonSan Diego

BOS - SAN

BOSSAN

Boston Logan Intl

Tue 3/17

5:30 pm-9:07 pm

Nonstop6h 37m

San Diego

Tue 3/24

10:03 pm-6:25 am

Nonstop5h 22m

$237

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Diego from

How to get the cheapest flight ticket from United States to San Diego

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Diego?

If you are unable to visit San Diego during the month of September, then departing from United States during the month March is also very affordable. Most momondo users find prices during this month for around $342.

What is the cheapest day to depart on your flight to San Diego?

The cheapest day to depart from United States to San Diego is on a Tuesday. Travelers who choose to depart for San Diego on a Tuesday will often find tickets for as low as $370. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $474. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

What is the cheapest time of day to depart on your flight to San Diego?

The cheapest time of day to fly to San Diego is in the evening when flights can be purchased for as low as $375. Flights at noon are often more expensive with an average ticket price of $437.

What is the cheapest United States to San Diego flight route?

Fly from Denver Intl to San Diego for the best United States - San Diego flight prices

How far in advance should I book a flight to San Diego?

You are more likely to see cheaper flights to San Diego from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $369 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from United States for as low as $307 on momondo.

What cabin class options are available on United States to San Diego flights?

There are 4 cabin classes available to choose from on United States to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to San Diego flights?

No. A direct flight is the cheapest option for a flight between United States to San Diego.

Cheap United States to San Diego flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to San Diego

Best Price Found

$68

Fastest flight time

0h 49m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from United States in the past 72 hours is $68. The best round-trip flight deal from United States to San Diego found on momondo in the last 72 hours is $93.
The fastest flight from United States to San Diego takes 0h 49m
Direct flights go from United States to San Diego every day.
There is 1 airport in San Diego. From United States there are direct flights to San Diego (SAN).
Search flight deals

  • When did momondo last update prices for flights from United States to San Diego Airport?

    Prices for flights from United States to San Diego Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from United States to San Diego Airport?

  • How old do you have to be to fly from United States to San Diego Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to San Diego Airport.

  • What documentation or ID do you need to fly to San Diego Airport?

    The travel and health documents you'll need for your trip to San Diego Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from United States to San Diego?

Best airlines flying from United States to San Diego

Compare and see reviews for airlines that fly from United States to San Diego with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $21Free CancellationRating
6.3
8,396 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $30Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
FrontierPriceFrom $36Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
JetBluePriceFrom $53Free CancellationRating
7.2
2,892 reviews
Search JetBlue flights
United AirlinesPriceFrom $57Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
DeltaPriceFrom $58Free CancellationRating
7.9
8,132 reviews
Search Delta flights
Alaska AirlinesPriceFrom $60Free CancellationRating
8.0
11,830 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $77Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
American AirlinesPriceFrom $181Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
Coronado
Chula Vista
El Cajon
Julian
Poway
National City
Imperial Beach
San Ysidro
Borrego Springs
La Mesa
Alpine
Lemon Grove
Santee

Why use momondo?

Why should I use momondo to find a flight deal from United States to San Diego?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United States to San Diego. momondo saves you time and could save you money on your trip.

Can I find flights from United States to San Diego with flexible booking policies on momondo?

Flights from United States to San Diego with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from United States to San Diego?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United States to San Diego.

I’m not ready to book a flight from United States to San Diego right now. Can momondo alert me if prices change?

Yes. momondo can track prices for United States to San Diego flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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