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Cheap flights from Boston to San Antonio from $71

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 2/2. 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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Spirit Airlines Logo
5:23 pm - 12:07 amBOS-SAT
31h 44m3 stops
Spirit Airlines Logo
6:30 am - 11:57 pmSAT-BOS
16h 27m2 stops
$304Spirit Airlines
Find Deal
Tue, Jan 20 - Fri, Jan 23
Multiple Airlines Logo
5:40 am - 9:30 amBOS-SAT
28h 50m1 stop
Multiple Airlines Logo
10:13 am - 1:04 amSAT-BOS
13h 51m2 stops
$307Multiple Airlines
Find Deal
Sun, Feb 22 - Sat, Feb 28
Delta Logo
11:46 am - 3:47 pmBOS-SAT
5h 01mnonstop
Delta Logo
6:30 am - 2:20 pmSAT-BOS
6h 50m1 stop
$309Delta
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Fri, Jan 23 - Thu, Jan 29
United Airlines Logo
6:00 am - 1:12 pmBOS-SAT
8h 12m2 stops
United Airlines Logo
7:47 am - 2:59 pmSAT-BOS
6h 12m1 stop
$310United Airlines
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Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
2:08 pm - 10:35 pmBOS-SAT
9h 27m1 stop
American Airlines Logo
11:28 am - 9:33 pmSAT-BOS
9h 05m1 stop
$312American Airlines
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Thu, Dec 4 - Tue, Dec 9
United Airlines Logo
8:15 am - 2:50 pmBOS-SAT
7h 35m1 stop
United Airlines Logo
5:25 am - 2:29 pmSAT-BOS
8h 04m2 stops
$314United Airlines
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Tue, Jan 20 - Sat, Jan 24
American Airlines Logo
5:30 am - 2:17 pmBOS-SAT
9h 47m1 stop
American Airlines Logo
10:33 am - 9:33 pmSAT-BOS
10h 00m1 stop
$318American Airlines
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Sun, Dec 7 - Sat, Dec 13
Frontier Logo
10:59 am - 10:10 amBOS-SAT
24h 11m2 stops
Frontier Logo
5:09 pm - 12:44 amSAT-BOS
6h 35m1 stop
$325Frontier
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Mon, Nov 24 - Fri, Nov 28
Delta Logo
9:20 am - 1:17 pmBOS-SAT
4h 57mnonstop
Delta Logo
2:15 pm - 7:18 pmSAT-BOS
4h 03mnonstop
$329Delta
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Wed, Dec 3 - Wed, Dec 10
Frontier Logo
6:00 am - 5:01 pmBOS-SAT
12h 01m1 stop
Frontier Logo
5:56 pm - 9:42 amSAT-BOS
14h 46m1 stop
$351Frontier
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Wed, Dec 24 - Mon, Dec 29

United Airlines flights from Boston to San Antonio

Our best United Airlines deals on Boston to San Antonio flight tickets
United Airlines
Dec 4
BOS6:00 amBoston Logan Intl
8h 12m
2 stops
SAT1:12 pmSan Antonio
Dec 7
SAT7:47 amSan Antonio
6h 12m
1 stop
BOS2:59 pmBoston Logan Intl
$310
Find similar
United Airlines
Jan 20
BOS8:15 amBoston Logan Intl
7h 35m
1 stop
SAT2:50 pmSan Antonio
Jan 24
SAT5:25 amSan Antonio
8h 04m
2 stops
BOS2:29 pmBoston Logan Intl
$314
Find similar
United Airlines
Nov 16
BOS7:05 amBoston Logan Intl
6h 59m
1 stop
SAT1:04 pmSan Antonio
Nov 20
SAT11:26 amSan Antonio
6h 06m
1 stop
BOS6:32 pmBoston Logan Intl
$594
Find similar

American Airlines flights from Boston to San Antonio

Our best American Airlines deals on Boston to San Antonio flight tickets
American Airlines
Dec 4
BOS2:08 pmBoston Logan Intl
9h 27m
1 stop
SAT10:35 pmSan Antonio
Dec 9
SAT11:28 amSan Antonio
9h 05m
1 stop
BOS9:33 pmBoston Logan Intl
$312
Find similar
American Airlines
Dec 7
BOS5:30 amBoston Logan Intl
9h 47m
1 stop
SAT2:17 pmSan Antonio
Dec 13
SAT10:33 amSan Antonio
10h 00m
1 stop
BOS9:33 pmBoston Logan Intl
$318
Find similar
American Airlines
Jan 15
BOS3:50 pmBoston Logan Intl
7h 52m
1 stop
SAT10:42 pmSan Antonio
Jan 19
SAT5:00 pmSan Antonio
5h 54m
1 stop
BOS11:54 pmBoston Logan Intl
$319
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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 November 6, 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

Tue 1/20

5:23 pm-12:07 am

3 stops31h 44m

San Antonio

Fri 1/23

6:30 am-11:57 pm

2 stops16h 27m

$304

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 2/22

5:40 am-9:30 am

1 stop28h 50m

San Antonio

Sat 2/28

10:13 am-1:04 am

2 stops13h 51m

$307

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 1/23

11:46 am-3:47 pm

Nonstop5h 01m

San Antonio

Thu 1/29

6:30 am-2:20 pm

1 stop6h 50m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 12/4

6:00 am-1:12 pm

2 stops8h 12m

San Antonio

Sun 12/7

7:47 am-2:59 pm

1 stop6h 12m

$310

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 12/4

2:08 pm-10:35 pm

1 stop9h 27m

San Antonio

Tue 12/9

11:28 am-9:33 pm

1 stop9h 05m

$312

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 1/20

8:15 am-2:50 pm

1 stop7h 35m

San Antonio

Sat 1/24

5:25 am-2:29 pm

2 stops8h 04m

$314

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 12/7

5:30 am-2:17 pm

1 stop9h 47m

San Antonio

Sat 12/13

10:33 am-9:33 pm

1 stop10h 00m

$318

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 11/24

10:59 am-10:10 am

2 stops24h 11m

San Antonio

Fri 11/28

5:09 pm-12:44 am

1 stop6h 35m

$325

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 12/3

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Wed 12/10

2:15 pm-7:18 pm

Nonstop4h 03m

$329

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 12/24

6:00 am-5:01 pm

1 stop12h 01m

San Antonio

Mon 12/29

5:56 pm-9:42 am

1 stop14h 46m

$351

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 Tuesday when prices can be found for as low as $371. 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 $397. 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 $332 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 November 2025, prices for Boston to San Antonio flights are approximately 4% cheaper 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

$233

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 $233. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $388.
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 57m.

  • 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
8,122 reviews
Search Spirit Airlines flights
DeltaPriceFrom $239Free CancellationRating
7.9
8,001 reviews
Search Delta flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
SouthwestPriceFrom $246Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
9,007 reviews
Search United Airlines flights

  • Delta Flights From Boston to San Antonio

    Delta flight deals from Boston to San Antonio start from $239 round-trip. Over the 4 Delta flights for this route in a normal week, average airfare is usually $392 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
Boerne
Kerrville
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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