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Cheap flights from Boston to San Antonio from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Antonio departing on 11/12. 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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Southwest Logo
8:05 pm - 1:20 amBOS-SAT
6h 15m1 stop
Southwest Logo
3:40 pm - 10:15 pmSAT-BOS
5h 35m1 stop
$304Southwest
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Sat, Dec 20 - Wed, Dec 24
Spirit Airlines Logo
5:45 am - 6:32 pmBOS-SAT
13h 47m1 stop
Spirit Airlines Logo
6:10 pm - 11:57 pmSAT-BOS
28h 47m3 stops
$305Spirit Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Spirit Airlines Logo
3:55 pm - 6:32 pmBOS-SAT
27h 37m3 stops
Spirit Airlines Logo
7:37 pm - 5:31 pmSAT-BOS
20h 54m2 stops
$306Spirit Airlines
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Sat, Nov 8 - Tue, Nov 11
Delta Logo
9:20 am - 1:17 pmBOS-SAT
4h 57mnonstop
Delta Logo
1:33 pm - 9:08 pmSAT-BOS
6h 35m1 stop
$309Delta
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Fri, Dec 19 - Thu, Dec 25
Spirit Airlines Logo
3:55 pm - 6:32 pmBOS-SAT
27h 37m3 stops
Spirit Airlines Logo
7:37 pm - 5:31 pmSAT-BOS
20h 54m3 stops
$310Spirit Airlines
Find Deal
Sat, Nov 8 - Tue, Nov 11
American Airlines Logo
12:10 pm - 10:00 pmBOS-SAT
10h 50m1 stop
American Airlines Logo
6:48 am - 1:05 pmSAT-BOS
5h 17m1 stop
$311American Airlines
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Tue, Dec 9 - Fri, Dec 12
Frontier Logo
11:03 am - 5:01 pmBOS-SAT
30h 58m1 stop
Frontier Logo
7:34 pm - 10:51 amSAT-BOS
14h 17m1 stop
$314Frontier
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Sun, Jan 4 - Sun, Jan 11
Delta Logo
6:45 am - 1:43 pmBOS-SAT
7h 58m1 stop
Delta Logo
5:10 am - 2:47 pmSAT-BOS
8h 37m1 stop
$319Delta
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Wed, Dec 17 - Wed, Dec 24
United Airlines Logo
3:37 pm - 9:20 pmBOS-SAT
6h 43m1 stop
United Airlines Logo
7:40 am - 4:12 pmSAT-BOS
7h 32m2 stops
$336United Airlines
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Mon, Nov 24 - Fri, Nov 28
American Airlines Logo
9:00 am - 4:28 pmBOS-SAT
8h 28m1 stop
American Airlines Logo
4:30 pm - 11:22 pmSAT-BOS
5h 52m1 stop
$358American Airlines
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Thu, Nov 27 - Tue, Dec 2

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
Dec 3
BOS5:45 amBoston Logan Intl
13h 47m
1 stop
SAT6:32 pmSan Antonio
Dec 10
SAT6:10 pmSan Antonio
28h 47m
3 stops
BOS11:57 pmBoston Logan Intl
$305
Find similar
Spirit Airlines
Nov 8
BOS3:55 pmBoston Logan Intl
27h 37m
3 stops
SAT6:32 pmSan Antonio
Nov 11
SAT7:37 pmSan Antonio
20h 54m
2 stops
BOS5:31 pmBoston Logan Intl
$306
Find similar
Spirit Airlines
Nov 8
BOS3:55 pmBoston Logan Intl
27h 37m
3 stops
SAT6:32 pmSan Antonio
Nov 11
SAT7:37 pmSan Antonio
20h 54m
3 stops
BOS5:31 pmBoston Logan Intl
$310
Find similar

Delta flights from Boston to San Antonio

Our best Delta deals on Boston to San Antonio flight tickets
Delta
Dec 19
BOS9:20 amBoston Logan Intl
4h 57m
SAT1:17 pmSan Antonio
Dec 25
SAT1:33 pmSan Antonio
6h 35m
1 stop
BOS9:08 pmBoston Logan Intl
$309
Find similar
Delta
Dec 17
BOS6:45 amBoston Logan Intl
7h 58m
1 stop
SAT1:43 pmSan Antonio
Dec 24
SAT5:10 amSan Antonio
8h 37m
1 stop
BOS2:47 pmBoston Logan Intl
$319
Find similar
Delta
Dec 12
BOS9:20 amBoston Logan Intl
4h 57m
SAT1:17 pmSan Antonio
Dec 14
SAT2:15 pmSan Antonio
4h 03m
BOS7:18 pmBoston Logan Intl
$329
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momondo Fare Finder

 
Customize your flight search to find flights from Boston to San Antonio 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 October 21, 2025.
Use the filters below to find and compare flights from Boston to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 12/20

8:05 pm-1:20 am

1 stop6h 15m

San Antonio

Wed 12/24

3:40 pm-10:15 pm

1 stop5h 35m

$304

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 12/3

5:45 am-6:32 pm

1 stop13h 47m

San Antonio

Wed 12/10

6:10 pm-11:57 pm

3 stops28h 47m

$305

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/8

3:55 pm-6:32 pm

3 stops27h 37m

San Antonio

Tue 11/11

7:37 pm-5:31 pm

2 stops20h 54m

$306

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 12/19

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Thu 12/25

1:33 pm-9:08 pm

1 stop6h 35m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/8

3:55 pm-6:32 pm

3 stops27h 37m

San Antonio

Tue 11/11

7:37 pm-5:31 pm

3 stops20h 54m

$310

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 12/9

12:10 pm-10:00 pm

1 stop10h 50m

San Antonio

Fri 12/12

6:48 am-1:05 pm

1 stop5h 17m

$311

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 1/4

11:03 am-5:01 pm

1 stop30h 58m

San Antonio

Sun 1/11

7:34 pm-10:51 am

1 stop14h 17m

$314

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 12/17

6:45 am-1:43 pm

1 stop7h 58m

San Antonio

Wed 12/24

5:10 am-2:47 pm

1 stop8h 37m

$319

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 11/24

3:37 pm-9:20 pm

1 stop6h 43m

San Antonio

Fri 11/28

7:40 am-4:12 pm

2 stops7h 32m

$336

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 11/27

9:00 am-4:28 pm

1 stop8h 28m

San Antonio

Tue 12/2

4:30 pm-11:22 pm

1 stop5h 52m

$358

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 Antonio from

How to get the cheapest flight ticket from Boston to San Antonio

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 Antonio?

If you aren’t able to travel during the month of January, then book flights to San Antonio from Boston during July instead. Flights to San Antonio in July, while not as cheap as those in January, still average around $329.

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

The cheapest day to depart on your flight to San Antonio is on a Friday when prices can be found for as low as $375. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $460.

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

According to our data, the cheapest time of day to fly to San Antonio is in the afternoon. momondo users have found flights departing from Boston to San Antonio in the afternoon for as low as $292. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $400. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Boston Logan Intl to San Antonio flight route?

Fly from Boston Logan Intl to San Antonio for the best Boston Logan Intl - San Antonio flight prices

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

You are more likely to see cheaper flights to San Antonio from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $380 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Boston for as low as $324 on momondo.

What cabin class options are available on Boston Logan Intl to San Antonio flights?

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

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

As of October 2025, prices for Boston to San Antonio flights are approximately 44% more expensive when compared to flights at the same time last year.

When to book flights from Boston to San Antonio

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

Cheap Boston to San Antonio (BOS to SAT) flight deals and tips

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

Best Price Found

$208

Fastest flight time

4h 37m

Direct flights

Every day

Airports in San Antonio

1 airport
The best one-way flight to San Antonio from Boston in the past 72 hours is $208. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $409.
The fastest flight from Boston to San Antonio takes 4h 37m
Direct flights go from Boston to San Antonio every day.
There is 1 airport near San Antonio: San Antonio (SAT)
Search flight deals

  • How far is Boston Logan Intl to San Antonio by plane?

    A flight from Boston Logan Intl to San Antonio will travel around 1763.9 mi. In terms of flight time, this usually takes a little over 4h 50m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to San Antonio Airport?

    Prices for flights from Boston Logan Intl Airport to San Antonio Airport are updated daily.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to San Antonio Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to San Antonio 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 Boston Logan Intl Airport to San Antonio Airport.

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

    The travel and health documents you'll need for your trip to San Antonio 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 Antonio 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 Boston to San Antonio?

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

Best airlines flying from Boston to San Antonio

Compare and see reviews for airlines that fly from Boston to San Antonio with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $161Free CancellationRating
6.3
8,097 reviews
Search Spirit Airlines flights
DeltaPriceFrom $239Free CancellationRating
7.9
7,981 reviews
Search Delta flights
SouthwestPriceFrom $246Free CancellationRating
8.0
4,235 reviews
Search Southwest flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,988 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,029 reviews
Search American Airlines flights

  • Delta Flights From Boston to San Antonio

    Delta flight deals from Boston to San Antonio start from $239 round-trip. Over the 5 Delta flights for this route in a normal week, average airfare is usually $391 round-trip - but some users have found much cheaper deals with momondo.

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Boerne
Schertz
Pleasanton

Why use momondo?

Why should I use momondo to find a flight deal from Boston to San Antonio?

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

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

Yes. momondo enables you to select and highlight flights to San Antonio from Boston with this policy.

How can momondo help me find flights from Boston to San Antonio?

momondo helps you find the best flight between Boston and San Antonio by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to San Antonio from Boston. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Antonio trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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