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Cheap flights from Boston to San Antonio from $88

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 9/5. 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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Find the cheapest flights from Boston to San Antonio (BOS-SAT)

Cheap round-trip flights

Spirit Airlines Logo
5:45 am - 3:11 pmBOS-SAT
10h 26m1 stop
Spirit Airlines Logo
6:00 am - 10:08 pmSAT-BOS
15h 08m1 stop
$265Spirit Airlines
Find Deal
Sat, Nov 8 - Fri, Nov 14
Spirit Airlines Logo
11:13 am - 10:27 pmBOS-SAT
12h 14m1 stop
Spirit Airlines Logo
6:00 am - 12:40 amSAT-BOS
17h 40m2 stops
$267Spirit Airlines
Find Deal
Sun, Dec 7 - Sat, Dec 13
Spirit Airlines Logo
5:45 am - 3:11 pmBOS-SAT
10h 26m1 stop
Spirit Airlines Logo
4:16 pm - 12:40 amSAT-BOS
7h 24m1 stop
$269Spirit Airlines
Find Deal
Sat, Nov 8 - Mon, Nov 10
Logo
9:55 am - 4:40 pmBOS-SAT
7h 45m1 stop
Logo
6:00 am - 12:40 amSAT-BOS
17h 40m2 stops
$275
Find Deal
Fri, Nov 7 - Tue, Nov 11
United Airlines Logo
1:50 pm - 9:17 pmBOS-SAT
8h 27m1 stop
United Airlines Logo
2:25 pm - 9:38 pmSAT-BOS
6h 13m1 stop
$277United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Delta Logo
9:15 am - 12:55 pmBOS-SAT
4h 40mnonstop
Delta Logo
2:00 pm - 6:59 pmSAT-BOS
3h 59mnonstop
$279Delta
Find Deal
Sat, Nov 8 - Wed, Nov 12
Logo
6:20 am - 4:37 pmBOS-SAT
35h 17m2 stops
Logo
7:23 pm - 11:26 amSAT-BOS
15h 03m1 stop
$281
Find Deal
Fri, Oct 24 - Sun, Nov 2
Southwest Logo
5:35 am - 10:50 amBOS-SAT
6h 15m1 stop
Southwest Logo
5:55 am - 1:20 pmSAT-BOS
6h 25m1 stop
$287Southwest
Find Deal
Thu, Oct 16 - Tue, Oct 21
Delta Logo
9:15 am - 12:55 pmBOS-SAT
4h 40mnonstop
Delta Logo
5:15 am - 11:55 amSAT-BOS
5h 40m1 stop
$289Delta
Find Deal
Sat, Nov 8 - Wed, Nov 12
Southwest Logo
5:25 am - 12:05 pmBOS-SAT
7h 40m1 stop
Southwest Logo
5:45 am - 4:35 pmSAT-BOS
9h 50m1 stop
$292Southwest
Find Deal
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
Nov 8
BOS5:45 amBoston Logan Intl
10h 26m
1 stop
SAT3:11 pmSan Antonio
Nov 14
SAT6:00 amSan Antonio
15h 08m
1 stop
BOS10:08 pmBoston Logan Intl
$265
Find similar
Spirit Airlines
Dec 7
BOS11:13 amBoston Logan Intl
12h 14m
1 stop
SAT10:27 pmSan Antonio
Dec 13
SAT6:00 amSan Antonio
17h 40m
2 stops
BOS12:40 amBoston Logan Intl
$267
Find similar
Spirit Airlines
Nov 8
BOS5:45 amBoston Logan Intl
10h 26m
1 stop
SAT3:11 pmSan Antonio
Nov 10
SAT4:16 pmSan Antonio
7h 24m
1 stop
BOS12:40 amBoston Logan Intl
$269
Find similar

Delta flights from Boston to San Antonio

Our best Delta deals on Boston to San Antonio flight tickets
Delta
Nov 8
BOS9:15 amBoston Logan Intl
4h 40m
SAT12:55 pmSan Antonio
Nov 12
SAT2:00 pmSan Antonio
3h 59m
BOS6:59 pmBoston Logan Intl
$279
Find similar
Delta
Nov 8
BOS9:15 amBoston Logan Intl
4h 40m
SAT12:55 pmSan Antonio
Nov 12
SAT5:15 amSan Antonio
5h 40m
1 stop
BOS11:55 amBoston Logan Intl
$289
Find similar
Delta
Feb 7
BOS3:05 pmBoston Logan Intl
7h 36m
1 stop
SAT9:41 pmSan Antonio
Apr 4
SAT5:30 amSan Antonio
8h 34m
1 stop
BOS3:04 pmBoston Logan Intl
$299
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 August 28, 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 11/8

5:45 am-3:11 pm

1 stop10h 26m

San Antonio

Fri 11/14

6:00 am-10:08 pm

1 stop15h 08m

$265

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 12/7

11:13 am-10:27 pm

1 stop12h 14m

San Antonio

Sat 12/13

6:00 am-12:40 am

2 stops17h 40m

$267

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/8

5:45 am-3:11 pm

1 stop10h 26m

San Antonio

Mon 11/10

4:16 pm-12:40 am

1 stop7h 24m

$269

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 11/7

9:55 am-4:40 pm

1 stop7h 45m

San Antonio

Tue 11/11

6:00 am-12:40 am

2 stops17h 40m

$275

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 9/23

1:50 pm-9:17 pm

1 stop8h 27m

San Antonio

Tue 9/30

2:25 pm-9:38 pm

1 stop6h 13m

$277

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/8

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Wed 11/12

2:00 pm-6:59 pm

Nonstop3h 59m

$279

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 10/24

6:20 am-4:37 pm

2 stops35h 17m

San Antonio

Sun 11/2

7:23 pm-11:26 am

1 stop15h 03m

$281

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 10/16

5:35 am-10:50 am

1 stop6h 15m

San Antonio

Tue 10/21

5:55 am-1:20 pm

1 stop6h 25m

$287

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/8

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Wed 11/12

5:15 am-11:55 am

1 stop5h 40m

$289

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 11/27

5:25 am-12:05 pm

1 stop7h 40m

San Antonio

Tue 12/2

5:45 am-4:35 pm

1 stop9h 50m

$292

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 September, then book flights to San Antonio from Boston during January instead. Flights to San Antonio in January, while not as cheap as those in September, still average around $324.

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 $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 $464.

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 $398. 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 $366 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 $318 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 August 2025, prices for Boston to San Antonio flights are approximately 5% 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 25m

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 25m
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 $158Free CancellationRating
6.3
8,028 reviews
Search Spirit Airlines flights
JetBluePriceFrom $186Free CancellationRating
7.2
2,920 reviews
Search JetBlue flights
United AirlinesPriceFrom $206Free CancellationRating
7.4
8,944 reviews
Search United Airlines flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $239Free CancellationRating
7.9
7,977 reviews
Search Delta flights
SouthwestPriceFrom $256Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Delta Flights From Boston to San Antonio

    Delta flight deals from Boston to San Antonio start from $239 round-trip. Over the 6 Delta flights for this route in a normal week, average airfare is usually $382 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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