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Cheap flights from San Antonio to San Diego from $64

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 2/21. 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
5:36 pm - 9:41 pm
SAT
-
SAN
6h 05m
1 stop
Frontier Logo
6:25 am - 7:01 pm
SAN
-
SAT
10h 36m
1 stop
$128Frontier
Tue, Feb 24 - Sat, Feb 28
Frontier Logo
8:22 pm - 9:41 pm
SAT
-
SAN
27h 19m
1 stop
Frontier Logo
9:18 pm - 9:06 am
SAN
-
SAT
9h 48m
1 stop
$132Frontier
Mon, Mar 2 - Fri, Mar 6
Frontier Logo
11:35 am - 1:05 pm
SAT
-
SAN
27h 30m
1 stop
Frontier Logo
8:45 am - 5:15 pm
SAN
-
SAT
6h 30m
1 stop
$134Frontier
Sun, Mar 1 - Wed, Mar 4
Frontier Logo
5:36 pm - 9:41 pm
SAT
-
SAN
6h 05m
1 stop
Frontier Logo
6:25 am - 7:01 pm
SAN
-
SAT
10h 36m
1 stop
$138Frontier
Tue, Feb 24 - Sat, Feb 28
Frontier Logo
9:20 am - 4:04 pm
SAT
-
SAN
8h 44m
1 stop
Frontier Logo
11:59 am - 7:25 pm
SAN
-
SAT
5h 26m
1 stop
$148Frontier
Mon, Feb 23 - Thu, Feb 26
Frontier Logo
9:39 pm - 9:41 pm
SAT
-
SAN
26h 02m
2 stops
Frontier Logo
9:18 pm - 9:06 am
SAN
-
SAT
9h 48m
1 stop
$151Frontier
Mon, Mar 2 - Fri, Mar 6
Frontier Logo
8:20 pm - 7:40 am
SAT
-
SAN
13h 20m
1 stop
Frontier Logo
2:52 pm - 8:44 pm
SAN
-
SAT
27h 52m
1 stop
$154Frontier
Thu, Feb 26 - Sun, Mar 1
Frontier Logo
8:22 pm - 9:41 pm
SAT
-
SAN
27h 19m
1 stop
Frontier Logo
11:30 am - 1:45 pm
SAN
-
SAT
24h 15m
1 stop
$159Frontier
Mon, Feb 23 - Mon, Mar 2
Frontier Logo
8:25 pm - 12:08 am
SAT
-
SAN
29h 43m
1 stop
Frontier Logo
6:25 am - 12:17 am
SAN
-
SAT
15h 52m
1 stop
$161Frontier
Thu, Mar 5 - Tue, Mar 10
Frontier Logo
5:36 pm - 9:41 pm
SAT
-
SAN
6h 05m
1 stop
Frontier Logo
11:59 am - 7:25 pm
SAN
-
SAT
5h 26m
1 stop
$164Frontier
Tue, Feb 17 - Thu, Feb 26

Frontier flights from San Antonio to San Diego

Our best Frontier deals on San Antonio to San Diego flight tickets
Frontier
Feb 24
SAT5:36 pmSan Antonio
6h 05m
1 stop
SAN9:41 pmSan Diego
Feb 28
SAN6:25 amSan Diego
10h 36m
1 stop
SAT7:01 pmSan Antonio
$128
Frontier
Mar 2
SAT8:22 pmSan Antonio
27h 19m
1 stop
SAN9:41 pmSan Diego
Mar 6
SAN9:18 pmSan Diego
9h 48m
1 stop
SAT9:06 amSan Antonio
$132
Frontier
Mar 1
SAT11:35 amSan Antonio
27h 30m
1 stop
SAN1:05 pmSan Diego
Mar 4
SAN8:45 amSan Diego
6h 30m
1 stop
SAT5:15 pmSan Antonio
$134

United Airlines flights from San Antonio to San Diego

Our best United Airlines deals on San Antonio to San Diego flight tickets
United Airlines
Feb 2
SAT2:06 pmSan Antonio
11h 36m
2 stops
SAN11:42 pmSan Diego
Feb 3
SAN10:26 amSan Diego
5h 05m
1 stop
SAT5:31 pmSan Antonio
$472
United Airlines
Jan 30
SAT4:43 pmSan Antonio
5h 59m
1 stop
SAN8:42 pmSan Diego
Feb 2
SAN11:10 amSan Diego
8h 11m
2 stops
SAT9:21 pmSan Antonio
$476
United Airlines
Feb 2
SAT2:06 pmSan Antonio
11h 36m
2 stops
SAN11:42 pmSan Diego
Feb 3
SAN11:10 amSan Diego
8h 11m
2 stops
SAT9:21 pmSan Antonio
$477

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 January 28, 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

Tue 2/24

5:36 pm-9:41 pm

1 stop6h 05m

San Diego

Sat 2/28

6:25 am-7:01 pm

1 stop10h 36m

$128

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Mon 3/2

8:22 pm-9:41 pm

1 stop27h 19m

San Diego

Fri 3/6

9:18 pm-9:06 am

1 stop9h 48m

$132

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Sun 3/1

11:35 am-1:05 pm

1 stop27h 30m

San Diego

Wed 3/4

8:45 am-5:15 pm

1 stop6h 30m

$134

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

6:25 am-7:01 pm

1 stop10h 36m

$138

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Mon 2/23

9:20 am-4:04 pm

1 stop8h 44m

San Diego

Thu 2/26

11:59 am-7:25 pm

1 stop5h 26m

$148

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Mon 3/2

9:39 pm-9:41 pm

2 stops26h 02m

San Diego

Fri 3/6

9:18 pm-9:06 am

1 stop9h 48m

$151

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 2/26

8:20 pm-7:40 am

1 stop13h 20m

San Diego

Sun 3/1

2:52 pm-8:44 pm

1 stop27h 52m

$154

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Mon 2/23

8:22 pm-9:41 pm

1 stop27h 19m

San Diego

Mon 3/2

11:30 am-1:45 pm

1 stop24h 15m

$159

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Thu 3/5

8:25 pm-12:08 am

1 stop29h 43m

San Diego

Tue 3/10

6:25 am-12:17 am

1 stop15h 52m

$161

San AntonioSan Diego

SAT - SAN

SATSAN

San Antonio

Tue 2/17

5:36 pm-9:41 pm

1 stop6h 05m

San Diego

Thu 2/26

11:59 am-7:25 pm

1 stop5h 26m

$164

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 $397. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $548. 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 $427. Flights in the morning are often more expensive with an average ticket price of $453.

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 $303 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 January 2026, prices for San Antonio to San Diego flights are approximately 4% more expensive 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

$195

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 $195. The best round-trip flight deal from San Antonio to San Diego found on momondo in the last 72 hours is $429.
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
8,384 reviews
Search Spirit Airlines flights
FrontierPriceFrom $110Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
DeltaPriceFrom $206Free CancellationRating
7.9
8,120 reviews
Search Delta flights
Alaska AirlinesPriceFrom $227Free CancellationRating
8.0
11,799 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $231Free CancellationRating
7.4
9,206 reviews
Search United Airlines flights
American AirlinesPriceFrom $231Free CancellationRating
7.2
11,198 reviews
Search American Airlines flights
SouthwestPriceFrom $295Free CancellationRating
8.0
4,268 reviews
Search Southwest flights

  • Southwest Flights From San Antonio to San Diego

    Southwest flies from San Antonio to San Diego around 5 times per week, with 4,268 momondo users rating the airline 8.0/10. The cheapest Southwest deal from San Antonio to San Diego in the last 72 hours was $295 (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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