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Cheap flights from Boston to San Antonio from $85

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 4/13. 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
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:30 am - 5:05 pm
BOS
-
SAT
12h 35m
1 stop
Multiple Airlines Logo
10:22 am - 11:59 pm
SAT
-
BOS
12h 37m
1 stop
$305Multiple Airlines
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
5:49 pm - 9:27 am
BOS
-
SAT
16h 38m
1 stop
Multiple Airlines Logo
6:00 pm - 10:21 am
SAT
-
BOS
15h 21m
2 stops
$306Multiple Airlines
Tue, Apr 7 - Mon, Apr 13
Multiple Airlines Logo
5:45 am - 9:27 am
BOS
-
SAT
28h 42m
1 stop
Multiple Airlines Logo
2:12 pm - 10:16 am
SAT
-
BOS
19h 04m
1 stop
$307Multiple Airlines
Sun, Apr 12 - Wed, Apr 15
Multiple Airlines Logo
5:45 am - 9:27 am
BOS
-
SAT
28h 42m
1 stop
Multiple Airlines Logo
3:00 pm - 7:48 am
SAT
-
BOS
39h 48m
2 stops
$309Multiple Airlines
Sun, Apr 12 - Thu, Apr 16
Spirit Airlines Logo
6:15 am - 11:59 pm
BOS
-
SAT
18h 44m
1 stop
Spirit Airlines Logo
6:07 am - 11:44 pm
SAT
-
BOS
16h 37m
1 stop
$310Spirit Airlines
Sun, May 10 - Sat, May 16
Spirit Airlines Logo
5:45 am - 9:27 am
BOS
-
SAT
28h 42m
1 stop
Spirit Airlines Logo
2:12 pm - 12:02 pm
SAT
-
BOS
20h 50m
1 stop
$311Spirit Airlines
Sun, Apr 12 - Wed, Apr 15
Spirit Airlines Logo
5:49 pm - 9:27 am
BOS
-
SAT
16h 38m
1 stop
Spirit Airlines Logo
1:22 pm - 11:46 am
SAT
-
BOS
21h 24m
2 stops
$312Spirit Airlines
Mon, Apr 13 - Tue, Apr 14
Multiple Airlines Logo
5:45 am - 3:09 pm
BOS
-
SAT
34h 24m
2 stops
Multiple Airlines Logo
6:07 am - 11:44 pm
SAT
-
BOS
16h 37m
1 stop
$313Multiple Airlines
Mon, Apr 27 - Thu, May 7
Spirit Airlines Logo
5:49 pm - 9:27 am
BOS
-
SAT
16h 38m
1 stop
Spirit Airlines Logo
10:22 am - 3:28 pm
SAT
-
BOS
28h 06m
1 stop
$315Spirit Airlines
Sat, Apr 4 - Tue, Apr 7
Multiple Airlines Logo
8:44 am - 8:15 am
BOS
-
SAT
24h 31m
1 stop
Multiple Airlines Logo
6:07 am - 11:44 pm
SAT
-
BOS
16h 37m
1 stop
$316Multiple Airlines
Wed, May 6 - Mon, May 11

Delta flights from Boston to San Antonio

Our best Delta deals on Boston to San Antonio flight tickets
Delta
Jun 10
BOS9:15 amBoston Logan Intl
4h 37m
SAT12:52 pmSan Antonio
Aug 12
SAT2:00 pmSan Antonio
4h 15m
BOS7:15 pmBoston Logan Intl
$339
Delta
May 14
BOS8:30 amBoston Logan Intl
4h 40m
SAT12:10 pmSan Antonio
May 18
SAT5:55 pmSan Antonio
11h 25m
1 stop
BOS6:20 amBoston Logan Intl
$349
Delta
Apr 25
BOS4:30 pmBoston Logan Intl
9h 16m
1 stop
SAT12:46 amSan Antonio
May 2
SAT4:43 pmSan Antonio
6h 09m
1 stop
BOS11:52 pmBoston Logan Intl
$359

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
May 10
BOS6:15 amBoston Logan Intl
18h 44m
1 stop
SAT11:59 pmSan Antonio
May 16
SAT6:07 amSan Antonio
16h 37m
1 stop
BOS11:44 pmBoston Logan Intl
$310
Spirit Airlines
Apr 12
BOS5:45 amBoston Logan Intl
28h 42m
1 stop
SAT9:27 amSan Antonio
Apr 15
SAT2:12 pmSan Antonio
20h 50m
1 stop
BOS12:02 pmBoston Logan Intl
$311
Spirit Airlines
Apr 13
BOS5:49 pmBoston Logan Intl
16h 38m
1 stop
SAT9:27 amSan Antonio
Apr 14
SAT1:22 pmSan Antonio
21h 24m
2 stops
BOS11:46 amBoston Logan Intl
$312

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 March 22, 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

Cheapest round-trip
Quickest round-trip

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 4/3

5:30 am-5:05 pm

1 stop12h 35m

San Antonio

Tue 4/7

10:22 am-11:59 pm

1 stop12h 37m

$305

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 4/7

5:49 pm-9:27 am

1 stop16h 38m

San Antonio

Mon 4/13

6:00 pm-10:21 am

2 stops15h 21m

$306

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 4/12

5:45 am-9:27 am

1 stop28h 42m

San Antonio

Wed 4/15

2:12 pm-10:16 am

1 stop19h 04m

$307

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 4/12

5:45 am-9:27 am

1 stop28h 42m

San Antonio

Thu 4/16

3:00 pm-7:48 am

2 stops39h 48m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 5/10

6:15 am-11:59 pm

1 stop18h 44m

San Antonio

Sat 5/16

6:07 am-11:44 pm

1 stop16h 37m

$310

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 4/12

5:45 am-9:27 am

1 stop28h 42m

San Antonio

Wed 4/15

2:12 pm-12:02 pm

1 stop20h 50m

$311

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 4/13

5:49 pm-9:27 am

1 stop16h 38m

San Antonio

Tue 4/14

1:22 pm-11:46 am

2 stops21h 24m

$312

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 4/27

5:45 am-3:09 pm

2 stops34h 24m

San Antonio

Thu 5/7

6:07 am-11:44 pm

1 stop16h 37m

$313

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 4/4

5:49 pm-9:27 am

1 stop16h 38m

San Antonio

Tue 4/7

10:22 am-3:28 pm

1 stop28h 06m

$315

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 5/6

8:44 am-8:15 am

1 stop24h 31m

San Antonio

Mon 5/11

6:07 am-11:44 pm

1 stop16h 37m

$316

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 $365. 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 $467.

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 $390 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 $306 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 March 2026, prices for Boston to San Antonio flights are approximately 0% 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

$203

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 $203. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $397.
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
3,019 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $195Free CancellationRating
6.3
8,532 reviews
Search Spirit Airlines flights
JetBluePriceFrom $227Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
DeltaPriceFrom $239Free CancellationRating
7.9
8,314 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,455 reviews
Search United Airlines flights
American AirlinesPriceFrom $258Free CancellationRating
7.1
11,486 reviews
Search American Airlines flights
SouthwestPriceFrom $258Free CancellationRating
8.0
4,324 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 7 Delta flights for this route in a normal week, average airfare is usually $414 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
Pleasanton
Schertz

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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