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Cheap flights from San Antonio to San Diego from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to San Diego departing on 4/21. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
3:14 pm - 11:06 pm
SAT
-
SAN
9h 52m
1 stop
Frontier Logo
3:20 pm - 11:40 am
SAN
-
SAT
18h 20m
2 stops
$173Frontier
Wed, Apr 15 - Thu, Apr 16
Frontier Logo
8:22 pm - 9:41 pm
SAT
-
SAN
27h 19m
1 stop
Frontier Logo
6:25 am - 7:37 pm
SAN
-
SAT
11h 12m
1 stop
$180Frontier
Mon, Feb 23 - Fri, Feb 27
Frontier Logo
5:36 pm - 9:41 pm
SAT
-
SAN
6h 05m
1 stop
Frontier Logo
12:23 pm - 6:22 pm
SAN
-
SAT
27h 59m
1 stop
$191Frontier
Tue, Feb 24 - Sat, Feb 28
Frontier Logo
6:45 am - 8:26 pm
SAT
-
SAN
15h 41m
1 stop
Frontier Logo
12:00 pm - 12:19 am
SAN
-
SAT
10h 19m
1 stop
$192Frontier
Fri, Apr 3 - Tue, Apr 7
Frontier Logo
3:14 pm - 11:06 pm
SAT
-
SAN
9h 52m
1 stop
Frontier Logo
12:36 pm - 2:19 pm
SAN
-
SAT
23h 43m
1 stop
$198Frontier
Wed, Apr 15 - Thu, Apr 16
Frontier Logo
4:54 pm - 8:59 pm
SAT
-
SAN
6h 05m
1 stop
Frontier Logo
9:08 pm - 12:17 am
SAN
-
SAT
25h 09m
1 stop
$199Frontier
Thu, Mar 19 - Mon, Mar 23
Frontier Logo
8:20 pm - 12:08 am
SAT
-
SAN
5h 48m
1 stop
Frontier Logo
8:20 pm - 8:45 am
SAN
-
SAT
10h 25m
1 stop
$201Frontier
Thu, Feb 26 - Sun, Mar 1
Frontier Logo
4:54 pm - 3:29 pm
SAT
-
SAN
24h 35m
1 stop
Frontier Logo
10:13 pm - 12:17 am
SAN
-
SAT
24h 04m
2 stops
$209Frontier
Thu, Mar 19 - Mon, Mar 23
Frontier Logo
6:45 am - 12:08 am
SAT
-
SAN
19h 23m
1 stop
Frontier Logo
9:18 pm - 12:17 am
SAN
-
SAT
24h 59m
1 stop
$210Frontier
Tue, Mar 24 - Mon, Mar 30
Frontier Logo
3:14 pm - 12:01 am
SAT
-
SAN
10h 47m
1 stop
Frontier Logo
12:36 pm - 2:19 pm
SAN
-
SAT
23h 43m
1 stop
$212Frontier
Thu, Apr 30 - Sun, May 3

United Airlines flights from San Antonio to San Diego

Our best United Airlines deals on San Antonio to San Diego flight tickets
United Airlines
Jun 30
SAT5:30 amSan Antonio
5h 35m
1 stop
SAN9:05 amSan Diego
Jul 4
SAN6:20 amSan Diego
8h 35m
2 stops
SAT4:55 pmSan Antonio
$222
United Airlines
Feb 14
SAT7:40 amSan Antonio
5h 34m
1 stop
SAN11:14 amSan Diego
Feb 18
SAN11:05 amSan Diego
8h 10m
2 stops
SAT9:15 pmSan Antonio
$282
United Airlines
Jul 6
SAT4:16 pmSan Antonio
5h 34m
1 stop
SAN7:50 pmSan Diego
Jul 20
SAN3:04 pmSan Diego
5h 38m
1 stop
SAT10:42 pmSan Antonio
$288

Southwest flights from San Antonio to San Diego

Our best Southwest deals on San Antonio to San Diego flight tickets
Southwest
Mar 21
SAT6:35 amSan Antonio
3h 10m
SAN7:45 amSan Diego
Apr 4
SAN7:30 pmSan Diego
2h 45m
SAT12:15 amSan Antonio
$275
Southwest
Apr 15
SAT6:35 pmSan Antonio
3h 00m
SAN7:35 pmSan Diego
Apr 16
SAN3:35 pmSan Diego
5h 20m
1 stop
SAT10:55 pmSan Antonio
$291
Southwest
Mar 18
SAT6:30 amSan Antonio
3h 10m
SAN7:40 amSan Diego
Apr 9
SAN11:15 amSan Diego
6h 25m
1 stop
SAT7:40 pmSan Antonio
$314

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio 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 12, 2026.
Use the filters below to find and compare flights from San Antonio to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Wed 4/15

3:14 pm-11:06 pm

1 stop9h 52m

San Diego

Thu 4/16

3:20 pm-11:40 am

2 stops18h 20m

$173

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Mon 2/23

8:22 pm-9:41 pm

1 stop27h 19m

San Diego

Fri 2/27

6:25 am-7:37 pm

1 stop11h 12m

$180

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Tue 2/24

5:36 pm-9:41 pm

1 stop6h 05m

San Diego

Sat 2/28

12:23 pm-6:22 pm

1 stop27h 59m

$191

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Fri 4/3

6:45 am-8:26 pm

1 stop15h 41m

San Diego

Tue 4/7

12:00 pm-12:19 am

1 stop10h 19m

$192

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Wed 4/15

3:14 pm-11:06 pm

1 stop9h 52m

San Diego

Thu 4/16

12:36 pm-2:19 pm

1 stop23h 43m

$198

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 3/19

4:54 pm-8:59 pm

1 stop6h 05m

San Diego

Mon 3/23

9:08 pm-12:17 am

1 stop25h 09m

$199

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 2/26

8:20 pm-12:08 am

1 stop5h 48m

San Diego

Sun 3/1

8:20 pm-8:45 am

1 stop10h 25m

$201

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 3/19

4:54 pm-3:29 pm

1 stop24h 35m

San Diego

Mon 3/23

10:13 pm-12:17 am

2 stops24h 04m

$209

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Tue 3/24

6:45 am-12:08 am

1 stop19h 23m

San Diego

Mon 3/30

9:18 pm-12:17 am

1 stop24h 59m

$210

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 4/30

3:14 pm-12:01 am

1 stop10h 47m

San Diego

Sun 5/3

12:36 pm-2:19 pm

1 stop23h 43m

$212

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 San Antonio 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 October, then departing from San Antonio during the month August is also very affordable. Most momondo users find prices during this month for around $329.

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

The cheapest day to depart from San Antonio to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $399. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $561. 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 afternoon when flights can be purchased for as low as $425. Flights in the morning are often more expensive with an average ticket price of $459.

What is the cheapest San Antonio to San Diego flight route?

Fly from San Antonio to San Diego for the best San Antonio - 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 San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $390 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from San Antonio for as low as $285 on momondo.

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

There is only 1 cabin class available to choose from on San Antonio to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have San Antonio to San Diego flight prices changed over time?

As of February 2026, prices for San Antonio to San Diego flights are approximately 16% cheaper when compared to flights at the same time last year.

When to book flights from San Antonio to San Diego

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to San Diego according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Antonio to San Diego (SAT to SAN) flight deals and tips

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

Best Price Found

$181

Fastest flight time

2h 45m

Direct flights

Every day

Airports in San Diego

1 airport
The best one-way flight to San Diego from San Antonio in the past 72 hours is $181. The best round-trip flight deal from San Antonio to San Diego found on momondo in the last 72 hours is $418.
The fastest flight from San Antonio to San Diego takes 2h 45m
Direct flights go from San Antonio to San Diego every day.
There is 1 airport in San Diego. From San Antonio there are direct flights to San Diego (SAN).
Search flight deals

  • How far is San Antonio to San Diego by plane?

    The straight-line distance from San Antonio to San Diego is 1125.3 mi. By plane, this route typically takes 2h 45m.

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

    Prices for flights from San Antonio Airport to San Diego Airport were last updated today.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to San Diego Airport.

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

    The required travel and health documents for your San Diego Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Diego Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

  • What is the most popular airline from San Antonio to San Diego?

Best airlines flying from San Antonio to San Diego

Compare and see reviews for airlines that fly from San Antonio to San Diego with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $55Free CancellationRating
6.3
8,445 reviews
Search Spirit Airlines flights
FrontierPriceFrom $110Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
DeltaPriceFrom $206Free CancellationRating
7.9
8,181 reviews
Search Delta flights
Alaska AirlinesPriceFrom $227Free CancellationRating
8.0
11,878 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $231Free CancellationRating
7.2
11,271 reviews
Search American Airlines flights
United AirlinesPriceFrom $236Free CancellationRating
7.4
9,281 reviews
Search United Airlines flights
SouthwestPriceFrom $292Free CancellationRating
8.0
4,280 reviews
Search Southwest flights

  • Southwest Flights From San Antonio to San Diego

    Southwest flies from San Antonio to San Diego around 6 times per week, with 4,280 momondo users rating the airline 8.0/10. The cheapest Southwest deal from San Antonio to San Diego in the last 72 hours was $292 (round-trip), much lower than the average airfare cost of $448 for Southwest flights on this route.

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 San Antonio to San Diego?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Diego from San Antonio.

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

All flight searches from San Antonio to San Diego on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from San Antonio 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 San Antonio to San Diego.

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

Price alerts on flights to San Diego from San Antonio are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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