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Cheap flights from Boston to San Antonio from $89

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 11/15. 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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Find the cheapest flights from Boston to San Antonio

Cheap round-trip flights

Spirit Airlines Logo
5:16 am - 5:30 pmBOS-SAT
13h 14m1 stop
Spirit Airlines Logo
7:35 pm - 11:16 amSAT-BOS
14h 41m1 stop
$270Spirit Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 3
Spirit Airlines Logo
5:45 am - 3:11 pmBOS-SAT
10h 26m1 stop
Spirit Airlines Logo
6:00 am - 12:40 amSAT-BOS
17h 40m2 stops
$271Spirit Airlines
Find Deal
Fri, Jan 9 - Wed, Jan 14
Spirit Airlines Logo
3:00 pm - 3:50 pmBOS-SAT
25h 50m2 stops
Spirit Airlines Logo
7:35 pm - 11:16 amSAT-BOS
14h 41m1 stop
$272Spirit Airlines
Find Deal
Wed, Oct 22 - Fri, Oct 31
Frontier Logo
10:53 am - 4:30 pmBOS-SAT
6h 37m1 stop
Frontier Logo
11:33 am - 7:52 amSAT-BOS
19h 19m2 stops
$275Frontier
Find Deal
Mon, Sep 29 - Thu, Oct 2
United Airlines Logo
5:24 pm - 10:35 pmBOS-SAT
6h 11m1 stop
United Airlines Logo
6:00 am - 1:25 pmSAT-BOS
6h 25m1 stop
$297United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Delta Logo
9:15 am - 12:55 pmBOS-SAT
4h 40mnonstop
Delta Logo
1:50 pm - 7:00 pmSAT-BOS
4h 10mnonstop
$299Delta
Find Deal
Tue, Oct 28 - Sat, Nov 8
Southwest Logo
5:15 am - 10:30 amBOS-SAT
6h 15m1 stop
Southwest Logo
5:15 am - 12:20 pmSAT-BOS
6h 05m1 stop
$308Southwest
Find Deal
Tue, Oct 28 - Thu, Oct 30
Delta Logo
9:15 am - 12:55 pmBOS-SAT
4h 40mnonstop
Delta Logo
6:41 am - 3:49 pmSAT-BOS
8h 08m1 stop
$309Delta
Find Deal
Wed, Oct 22 - Wed, Nov 5
Southwest Logo
5:00 am - 10:10 amBOS-SAT
6h 10m1 stop
Southwest Logo
5:00 am - 3:00 pmSAT-BOS
9h 00m2 stops
$313Southwest
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Tue, Oct 28 - Thu, Oct 30
American Airlines Logo
5:30 am - 2:06 pmBOS-SAT
9h 36m1 stop
American Airlines Logo
5:00 am - 11:48 amSAT-BOS
5h 48m1 stop
$321American Airlines
Find Deal
Wed, Oct 8 - Tue, Oct 21

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
Nov 2
BOS5:16 amBoston Logan Intl
13h 14m
1 stop
SAT5:30 pmSan Antonio
Nov 3
SAT7:35 pmSan Antonio
14h 41m
1 stop
BOS11:16 amBoston Logan Intl
$270
Find similar
Spirit Airlines
Jan 9
BOS5:45 amBoston Logan Intl
10h 26m
1 stop
SAT3:11 pmSan Antonio
Jan 14
SAT6:00 amSan Antonio
17h 40m
2 stops
BOS12:40 amBoston Logan Intl
$271
Find similar
Spirit Airlines
Oct 22
BOS3:00 pmBoston Logan Intl
25h 50m
2 stops
SAT3:50 pmSan Antonio
Oct 31
SAT7:35 pmSan Antonio
14h 41m
1 stop
BOS11:16 amBoston Logan Intl
$272
Find similar

Southwest flights from Boston to San Antonio

Our best Southwest deals on Boston to San Antonio flight tickets
Southwest
Oct 28
BOS5:15 amBoston Logan Intl
6h 15m
1 stop
SAT10:30 amSan Antonio
Oct 30
SAT5:15 amSan Antonio
6h 05m
1 stop
BOS12:20 pmBoston Logan Intl
$308
Find similar
Southwest
Oct 28
BOS5:00 amBoston Logan Intl
6h 10m
1 stop
SAT10:10 amSan Antonio
Oct 30
SAT5:00 amSan Antonio
9h 00m
2 stops
BOS3:00 pmBoston Logan Intl
$313
Find similar
Southwest
Oct 22
BOS5:30 amBoston Logan Intl
7h 30m
2 stops
SAT12:00 pmSan Antonio
Oct 31
SAT12:30 pmSan Antonio
8h 00m
2 stops
BOS9:30 pmBoston Logan Intl
$318
Find similar

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 September 16, 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

Sun 11/2

5:16 am-5:30 pm

1 stop13h 14m

San Antonio

Mon 11/3

7:35 pm-11:16 am

1 stop14h 41m

$270

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 1/9

5:45 am-3:11 pm

1 stop10h 26m

San Antonio

Wed 1/14

6:00 am-12:40 am

2 stops17h 40m

$271

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 10/22

3:00 pm-3:50 pm

2 stops25h 50m

San Antonio

Fri 10/31

7:35 pm-11:16 am

1 stop14h 41m

$272

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 9/29

10:53 am-4:30 pm

1 stop6h 37m

San Antonio

Thu 10/2

11:33 am-7:52 am

2 stops19h 19m

$275

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/7

5:24 pm-10:35 pm

1 stop6h 11m

San Antonio

Tue 10/14

6:00 am-1:25 pm

1 stop6h 25m

$297

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/28

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Sat 11/8

1:50 pm-7:00 pm

Nonstop4h 10m

$299

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/28

5:15 am-10:30 am

1 stop6h 15m

San Antonio

Thu 10/30

5:15 am-12:20 pm

1 stop6h 05m

$308

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 10/22

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Wed 11/5

6:41 am-3:49 pm

1 stop8h 08m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/28

5:00 am-10:10 am

1 stop6h 10m

San Antonio

Thu 10/30

5:00 am-3:00 pm

2 stops9h 00m

$313

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 10/8

5:30 am-2:06 pm

1 stop9h 36m

San Antonio

Tue 10/21

5:00 am-11:48 am

1 stop5h 48m

$321

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 Wednesday when prices can be found for as low as $372. 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 Monday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Monday is $471.

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 $399. 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 $376 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 September 2025, prices for Boston to San Antonio flights are approximately 65% 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

$243

Fastest flight time

4h 30m

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 $243. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $259.
The fastest flight from Boston to San Antonio takes 4h 30m
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 40m.

  • 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 $160Free CancellationRating
6.3
8,019 reviews
Search Spirit Airlines flights
JetBluePriceFrom $204Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
DeltaPriceFrom $239Free CancellationRating
7.9
7,957 reviews
Search Delta flights
United AirlinesPriceFrom $254Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
American AirlinesPriceFrom $257Free CancellationRating
7.2
10,000 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 $384 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

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