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Cheap Flights from San Antonio International to San Diego

Compare San Antonio International to San Diego flight deals

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Flight deals from San Antonio International Airport to San Diego

Looking for a cheap last-minute deal or the best return flight from San Antonio International Airport to San Diego? If you want to travel next month, return fares start from $212. Find the lowest prices on one-way and return tickets right here.
San Diego.$212 per passenger.Departing Tue, 3 Mar, returning Thu, 5 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Tue, 3 Mar, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Thu, 5 Mar, arriving in San Antonio International.Price includes taxes and charges.From $212, select.
San Diego.$227 per passenger.Departing Sat, 28 Feb, returning Wed, 4 Mar.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Sat, 28 Feb, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Wed, 4 Mar, arriving in San Antonio International.Price includes taxes and charges.From $227, select.
San Diego.$286 per passenger.Departing Thu, 12 Feb, returning Thu, 19 Feb.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Thu, 12 Feb, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Thu, 19 Feb, arriving in San Antonio International.Price includes taxes and charges.From $286, select.
San Diego.$296 per passenger.Departing Thu, 9 Apr, returning Mon, 13 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Thu, 9 Apr, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Mon, 13 Apr, arriving in San Antonio International.Price includes taxes and charges.From $296, select.
San Diego.$359 per passenger.Departing Mon, 30 Mar, returning Thu, 2 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Mon, 30 Mar, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Thu, 2 Apr, arriving in San Antonio International.Price includes taxes and charges.From $359, select.
San Diego.$455 per passenger.Departing Fri, 15 May, returning Mon, 18 May.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from San Antonio International on Fri, 15 May, arriving in San Diego International.Inbound indirect flight with Frontier Airlines, departs from San Diego International on Mon, 18 May, arriving in San Antonio International.Price includes taxes and charges.From $455, select.
San Diego.$627 per passenger.Departing Thu, 30 Apr, returning Mon, 25 May.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Thu, 30 Apr, arriving in San Diego International.Inbound indirect flight with Delta, departs from San Diego International on Mon, 25 May, arriving in San Antonio International.Price includes taxes and charges.From $627, select.
San Diego.$639 per passenger.Departing Tue, 2 Jun, returning Thu, 4 Jun.Return flight with United.Outbound indirect flight with United, departs from San Antonio International on Tue, 2 Jun, arriving in San Diego International.Inbound indirect flight with United, departs from San Diego International on Thu, 4 Jun, arriving in San Antonio International.Price includes taxes and charges.From $639, select.
San Diego.$639 per passenger.Departing Thu, 27 Aug, returning Sun, 30 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Thu, 27 Aug, arriving in San Diego International.Inbound indirect flight with Delta, departs from San Diego International on Sun, 30 Aug, arriving in San Antonio International.Price includes taxes and charges.From $639, select.
San Diego.$640 per passenger.Departing Fri, 17 Jul, returning Wed, 22 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Fri, 17 Jul, arriving in San Diego International.Inbound indirect flight with Delta, departs from San Diego International on Wed, 22 Jul, arriving in San Antonio International.Price includes taxes and charges.From $640, select.
San Diego.$839 per passenger.Departing Sat, 20 Jun, returning Sun, 5 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from San Antonio International on Sat, 20 Jun, arriving in San Diego International.Inbound indirect flight with Southwest Airlines, departs from San Diego International on Sun, 5 Jul, arriving in San Antonio International.Price includes taxes and charges.From $839, select.
San Diego.$842 per passenger.Departing Thu, 23 Jul, returning Sun, 26 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from San Antonio International on Thu, 23 Jul, arriving in San Diego International.Inbound direct flight with Southwest Airlines departs from San Diego International on Sun, 26 Jul, arriving in San Antonio International.Price includes taxes and charges.From $842, select.

Find the cheapest month to fly from San Antonio International to San Diego

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Antonio International to San Diego flights are currently cheapest in March.
Feb
from $286
Mar
from $212
Apr
from $296
May
from $455
Jun
from $639
Jul
from $640
Aug
from $639
Sep
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Oct
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Nov
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Dec
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Jan
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Direct flights from San Antonio International to San Diego

Alternative San Antonio International to San Diego routes

Looking for the cheapest, fastest or easiest route from San Antonio International to San Diego? You could fly into the following airports instead.

San Diego International

4km from central San Diego
ClosestCheapest
from $212
Search flights

McClellan-Palomar

48km from central San Diego
from $1,652
Search flights

San Antonio to San Diego: Flight information

The things to know before you go.
Cheapest flight found$212
Cheapest month to flyMarch
Average flight time2 hrs, 58 mins
Most popular airlineSouthwest Airlines
Average flights per week13

Finding cheap flights from San Antonio International to San Diego: Frequently asked questions

There are 2 airports in San Diego: San Diego International and McClellan-Palomar.
The best price we found for a return flight from San Antonio International to San Diego is $212. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
2 hours and 58 minutes is the average flight time from San Antonio International to San Diego.
Southwest Airlines flies direct from San Antonio International to San Diego.
As of February 2026, there are 13 flights per week flying from San Antonio International to San Diego.
The cheapest month to fly from San Antonio International to San Diego is usually March.
If you're flying from San Antonio International Airport, the cheapest airport near San Diego is San Diego International – which is 4.1 km away from the centre of San Diego. We've found flights into this airport from $212.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Antonio International Airport to San Diego on Tuesday, 3 March 2026.
Yes – the average flight time is 2 hours and 58 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Diego but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Diego is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 13°C. August is typically the warmest month in San Diego, when it usually averages around 28°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 10°C. The rainiest month is February.
Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to San Diego.

Flying from San Antonio International Airport (SAT) to San Diego: what you need to know

  • Take a direct flight from San Antonio International Airport to San Diego and you'll be travelling for an average of 2 hours 45 minutes.

  • San Antonio International Airport is located in San Antonio. Based in the UTC-7 timezone, San Diego is two hours behind San Antonio.

  • San Antonio International Airport (SAT) to San Diego International Airport (SAN) is the most traveled route, with seven weekly flights to pick from. You can travel from SAT to SAN at 06:10 with Southwest Airlines.

  • To avoid rushing for your SAT to San Diego flight, leave plenty of time to check in and drop off your luggage. Arriving two hours before international departures and one hour before domestic flights is the general travel rule.

  • Taking off during a peak time like public or school holidays? Expect longer queues at security and check-in. To be on the safe side, arrive up to four hours before international flights and two hours before domestic departures.

  • You can book a direct San Antonio International Airport to San Diego ticket. Begin your trip at SAT and arrive at San Diego International Airport (SAN).

  • Keep your eyes peeled for deals with Southwest Airlines. This carrier operates direct flights from San Antonio International Airport to San Diego.

  • The journey from central San Antonio to SAT takes about 1 hour 30 minutes by public transport. If you drive, ride-share or grab a cab, you'll cover the 13 kilometres in 20 minutes or so, depending on traffic.

  • Looking for a hotel near SAT? If you're catching an early flight from San Antonio International Airport to San Diego, these accommodation options put the terminal practically at your doorstep:

  • 83.17% of flights departing from San Antonio International Airport arrive at their destination according to schedule. With its reliable on-time performance, you're unlikely to experience delays when flying out of SAT.

  • The address for SAT is 9800 Airport Boulevard.

How to find the cheapest flights from San Antonio International Airport (SAT) to San Diego

  • $85 is the cheapest price we've found for a one-way San Antonio International Airport to San Diego flight. A return flight ticket right now is $212. Depending on when you book and the availability, these fares may change.

  • To score cheap flights from SAT to San Diego, reserve your trip one month ahead of your departure.

  • May is the best month for nabbing an awesome deal on San Antonio International Airport to San Diego tickets. If you want to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • You don't need to keep looking every day to find out if fares have dropped when you create a Price Alert. We'll let you know the moment there's an even bigger deal on cheap flights from SAT to San Diego.

  • Tailor your flights with filters. Choose your ideal departure and arrival times, airlines and total journey duration. You can also sort your results by 'Best,' 'Fastest' or 'Cheapest' flights from San Antonio International Airport to San Diego.

Airports in San Diego

San Diego International Airport (SAN)

  • San Diego International Airport (SAN) to the centre of San Diego takes about 10 minutes by car. The centre is roughly 5 kilometres away.

  • Getting to the centre by public transport takes about 20 minutes.

  • Think about booking a hotel near SAN if you're coming in on a late flight from San Antonio International Airport to San Diego. Choose one of these options and skip the long transfer:

  • Pick up a San Diego International Airport rental car and discover San Diego and beyond with your own set of wheels. Thrifty, Dollar and Budget are leading providers to choose from here.

  • Reserving your ride from San Diego International Airport about two weeks ahead of your flight from SAT to San Diego can help you lock in the lowest rate.

  • You'll find SAN at N Harbour Dr.

McClellan-Palomar Airport (CLD)

  • Once your flight from San Antonio International Airport to San Diego has arrived, you can reach the city centre in around 40 minutes by car. Central San Diego is roughly 56 kilometres from McClellan-Palomar Airport (CLD).

  • You can expect the journey to take about 2 hours 15 minutes on public transport.

  • Following your SAT to San Diego flight, tuck yourself in at a hotel close to CLD. These are some great accommodation options that'll help you sink into relaxation mode:

  • Budget, Hertz and Avis make picking up a McClellan-Palomar Airport rental car quick and easy. These trusted providers are located in or around the terminal and will have you behind the wheel before you know it.

  • Get the vehicle you prefer, not just what's left over, by booking your ride from CLD in advance. You'll also avoid paying more than you need to, especially when the airport is busy.

Best time to go to San Diego

  • Carefully consider your trip dates before booking your flight from San Antonio International Airport to San Diego. The city comes alive in high season, but prices are generally higher and top attractions can be busy. Visit San Diego in the low season if you prefer a more relaxed vibe.

  • When booking your San Antonio International Airport to San Diego flight ticket, think about what kind of weather you prefer. August is the warmest month in San Diego, with temperatures ranging from 17ºC to 28ºC.

  • Look for cheap tickets from SAT to San Diego in February if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 7ºC and 23ºC on average.

More about San Diego

  • When it comes to searching for somewhere to lay your head, you'll find the most popular stays in San Diego right here. Browse these hotels once you've locked in your flight from San Antonio International Airport to San Diego:

  • There are so many things to discover in this city it can be difficult to know where to begin. USS Midway Museum, San Diego Zoo and SeaWorld San Diego are top sights which should feature on any good San Diego itinerary.

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be explored once you've seen San Diego. Around 177 kilometres away to the north-west, its top attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Phoenix is another well-known destination in United States and is around 483 kilometres east of San Diego. No trip is complete without visiting Desert Botanical Garden, Heard Museum and Papago Park.

More travel options

Plan the rest of your trip from San Antonio to San Diego

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.