Route guide · 1,127 miles
Cheap Flights from San Antonio to San Diego
SAT → SAN · Nonstop 2h 47m · Live round-trip fares
If San Diego is next on your list, here's the honest picture on fares from San Antonio. The trip covers about 1,127 miles and takes roughly 2h 47m in the air. Prices on this route reward planners: booking 3–6 weeks ahead is the sweet spot, and the lowest fares tend to sell out fast.
Live fares for SAT → SAN are updating. Use the search below for real-time prices.
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Updated daily
Flight time
2h 47m
Nonstop, typical
Distance
1,127 mi
SAT → SAN
Book ahead
3–6 weeks
Best window, typically
Nonstop airlines
1
Southwest Airlines
Nonstop flights from San Antonio to San Diego
Want to skip the layover? Nonstops from San Antonio to San Diego are flown by Southwest Airlines, getting you there in about 2h 47m. For the lowest fares, book around 3–6 weeks before departure — last-minute nonstops on this route rarely come cheap.
Booking insights: San Antonio → San Diego
- Distance: 1,127 miles · nonstop flight time: 2h 47m.
- Rule of thumb for this route: the sweet spot is usually 3–6 weeks before departure.
- Tuesday and Wednesday departures usually undercut Friday and Sunday fares on routes like this one.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
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Flying from San Antonio to San Diego: what you need to know
The flight
San Antonio to San Diego covers 1,127 miles, and a nonstop gets it done in about 2h 47m. That's long enough to settle in with a coffee and a downloaded show, short enough that a connection rarely makes sense — a layover usually doubles your travel day to save very little.
Airlines on this route
Southwest Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from San Antonio (SAT)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our San Antonio airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in San Diego (SAN)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The San Diego airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check San Diego to San Antonio fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 1,127 miles, booking 3–6 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 2h 47m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
- Flexible dates? Search a few days either side — one day can change the fare a lot.
San Antonio to San Diego flight FAQs
How long is the flight from SAT to SAN?
Nonstop flights from San Antonio to San Diego take about 2h 47m and cover roughly 1,127 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from San Antonio to San Diego?
Yes — look for Southwest Airlines on this route. Nonstop seats are usually priced best 3–6 weeks before departure.
What is the cheapest month to fly from San Antonio to San Diego?
Travelers usually find the gentlest prices away from peak periods — think post-holiday January and the early-fall weeks. Midweek dates inside those windows are cheaper still.
How much are last minute flights from SAT to SAN?
Book inside the final week and you'll usually pay a premium on SAT to SAN. Fares booked 3–6 weeks ahead are almost always kinder.
What is a good round-trip deal from San Antonio to San Diego?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from San Antonio to San Diego?
The main carriers on this route are Southwest Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to San Antonio airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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