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Cheap flights from Boston to San Antonio from $61

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 2/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Spirit Airlines Logo
4:22 pm - 11:59 pm
BOS
-
SAT
8h 37m
1 stop
Spirit Airlines Logo
6:00 am - 11:44 pm
SAT
-
BOS
16h 44m
2 stops
$254Spirit Airlines
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
12:56 pm - 9:06 am
BOS
-
SAT
21h 10m
2 stops
Frontier Logo
3:26 pm - 11:41 am
SAT
-
BOS
19h 15m
1 stop
$256Frontier
Fri, Mar 6 - Mon, Mar 9
Frontier Logo
12:56 pm - 9:06 am
BOS
-
SAT
21h 10m
2 stops
Frontier Logo
3:26 pm - 11:41 am
SAT
-
BOS
19h 15m
1 stop
$258Frontier
Fri, Mar 6 - Mon, Mar 9
Multiple Airlines Logo
4:22 pm - 11:59 pm
BOS
-
SAT
8h 37m
1 stop
Multiple Airlines Logo
6:45 am - 11:41 am
SAT
-
BOS
27h 56m
2 stops
$262Multiple Airlines
Fri, Mar 6 - Tue, Mar 10
Spirit Airlines Logo
4:22 pm - 11:59 pm
BOS
-
SAT
8h 37m
1 stop
Spirit Airlines Logo
10:26 am - 11:44 pm
SAT
-
BOS
12h 18m
1 stop
$263Spirit Airlines
Mon, Mar 9 - Wed, Mar 11
Frontier Logo
6:00 am - 2:41 pm
BOS
-
SAT
9h 41m
1 stop
Frontier Logo
6:45 am - 11:41 am
SAT
-
BOS
27h 56m
2 stops
$264Frontier
Fri, Mar 6 - Tue, Mar 10
Spirit Airlines Logo
12:43 pm - 11:59 pm
BOS
-
SAT
12h 16m
1 stop
Spirit Airlines Logo
10:26 am - 12:07 am
SAT
-
BOS
12h 41m
1 stop
$265Spirit Airlines
Tue, Mar 10 - Wed, Mar 18
Spirit Airlines Logo
5:40 am - 9:30 am
BOS
-
SAT
28h 50m
1 stop
Spirit Airlines Logo
10:26 am - 11:59 pm
SAT
-
BOS
12h 33m
1 stop
$266Spirit Airlines
Wed, Apr 29 - Sat, May 2
Multiple Airlines Logo
6:00 am - 11:59 pm
BOS
-
SAT
18h 59m
2 stops
Multiple Airlines Logo
3:26 pm - 11:41 am
SAT
-
BOS
19h 15m
1 stop
$267Multiple Airlines
Fri, Feb 27 - Mon, Mar 9
Spirit Airlines Logo
5:49 pm - 9:32 am
BOS
-
SAT
16h 43m
1 stop
Spirit Airlines Logo
10:27 am - 11:59 pm
SAT
-
BOS
12h 32m
1 stop
$268Spirit Airlines
Fri, Mar 20 - Tue, Mar 24

Delta flights from Boston to San Antonio

Our best Delta deals on Boston to San Antonio flight tickets
Delta
Feb 20
BOS11:46 amBoston Logan Intl
4h 59m
SAT3:45 pmSan Antonio
Feb 24
SAT12:18 pmSan Antonio
3h 52m
BOS5:10 pmBoston Logan Intl
$299
Delta
Mar 6
BOS11:46 amBoston Logan Intl
4h 59m
SAT3:45 pmSan Antonio
Mar 9
SAT5:59 pmSan Antonio
11h 11m
1 stop
BOS6:10 amBoston Logan Intl
$309
Delta
Jan 28
BOS11:46 amBoston Logan Intl
4h 59m
SAT3:45 pmSan Antonio
Feb 3
SAT12:25 pmSan Antonio
3h 54m
BOS5:19 pmBoston Logan Intl
$469

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
Mar 3
BOS4:22 pmBoston Logan Intl
8h 37m
1 stop
SAT11:59 pmSan Antonio
Mar 5
SAT6:00 amSan Antonio
16h 44m
2 stops
BOS11:44 pmBoston Logan Intl
$254
Spirit Airlines
Mar 9
BOS4:22 pmBoston Logan Intl
8h 37m
1 stop
SAT11:59 pmSan Antonio
Mar 11
SAT10:26 amSan Antonio
12h 18m
1 stop
BOS11:44 pmBoston Logan Intl
$263
Spirit Airlines
Mar 10
BOS12:43 pmBoston Logan Intl
12h 16m
1 stop
SAT11:59 pmSan Antonio
Mar 18
SAT10:26 amSan Antonio
12h 41m
1 stop
BOS12:07 amBoston Logan Intl
$265

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 January 15, 2026.
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 3/3

4:22 pm-11:59 pm

1 stop8h 37m

San Antonio

Thu 3/5

6:00 am-11:44 pm

2 stops16h 44m

$254

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 3/6

12:56 pm-9:06 am

2 stops21h 10m

San Antonio

Mon 3/9

3:26 pm-11:41 am

1 stop19h 15m

$256

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 3/6

12:56 pm-9:06 am

2 stops21h 10m

San Antonio

Mon 3/9

3:26 pm-11:41 am

1 stop19h 15m

$258

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 3/6

4:22 pm-11:59 pm

1 stop8h 37m

San Antonio

Tue 3/10

6:45 am-11:41 am

2 stops27h 56m

$262

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 3/9

4:22 pm-11:59 pm

1 stop8h 37m

San Antonio

Wed 3/11

10:26 am-11:44 pm

1 stop12h 18m

$263

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 3/6

6:00 am-2:41 pm

1 stop9h 41m

San Antonio

Tue 3/10

6:45 am-11:41 am

2 stops27h 56m

$264

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 3/10

12:43 pm-11:59 pm

1 stop12h 16m

San Antonio

Wed 3/18

10:26 am-12:07 am

1 stop12h 41m

$265

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 4/29

5:40 am-9:30 am

1 stop28h 50m

San Antonio

Sat 5/2

10:26 am-11:59 pm

1 stop12h 33m

$266

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 2/27

6:00 am-11:59 pm

2 stops18h 59m

San Antonio

Mon 3/9

3:26 pm-11:41 am

1 stop19h 15m

$267

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 3/20

5:49 pm-9:32 am

1 stop16h 43m

San Antonio

Tue 3/24

10:27 am-11:59 pm

1 stop12h 32m

$268

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 July, then book flights to San Antonio from Boston during June instead. Flights to San Antonio in June, while not as cheap as those in July, still average around $339.

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 $349. 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 $456.

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 at noon. momondo users have found flights departing from Boston to San Antonio at noon for as low as $373. 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 $390. 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 $383 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 $299 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 January 2026, prices for Boston to San Antonio flights are approximately 47% 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

$218

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 $218. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $333.
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 in San Antonio. From Boston there are direct flights to 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 37m.

  • 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
FrontierPriceFrom $102Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $160Free CancellationRating
6.3
8,319 reviews
Search Spirit Airlines flights
JetBluePriceFrom $227Free CancellationRating
7.2
2,887 reviews
Search JetBlue flights
SouthwestPriceFrom $237Free CancellationRating
8.0
4,258 reviews
Search Southwest flights
DeltaPriceFrom $239Free CancellationRating
7.9
8,049 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,164 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,132 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 6 Delta flights for this route in a normal week, average airfare is usually $390 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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