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Cheap flights from Boston to San Antonio from $123

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 12/14. 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

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Spirit Airlines Logo
5:45 am - 11:26 pmBOS-SAT
18h 41m1 stop
Spirit Airlines Logo
5:40 am - 10:03 amSAT-BOS
27h 23m3 stops
$308Spirit Airlines
Find Deal
пн, груд. 8 - нд, груд. 14
Delta Logo
9:20 am - 1:17 pmBOS-SAT
4h 57mnonstop
Delta Logo
5:20 am - 11:59 amSAT-BOS
5h 39m1 stop
$309Delta
Find Deal
чт, груд. 18 - чт, січ. 1
Multiple Airlines Logo
8:11 pm - 7:55 amBOS-SAT
12h 44m1 stop
Multiple Airlines Logo
2:39 pm - 10:08 amSAT-BOS
18h 29m2 stops
$310Multiple Airlines
Find Deal
сб, груд. 13 - вт, груд. 30
Spirit Airlines Logo
5:45 am - 11:26 pmBOS-SAT
18h 41m1 stop
Spirit Airlines Logo
12:45 pm - 10:01 amSAT-BOS
20h 16m1 stop
$311Spirit Airlines
Find Deal
чт, груд. 11 - вт, груд. 30
Spirit Airlines Logo
5:45 am - 11:26 pmBOS-SAT
18h 41m1 stop
Spirit Airlines Logo
12:45 pm - 10:01 amSAT-BOS
20h 16m1 stop
$312Spirit Airlines
Find Deal
чт, груд. 11 - пн, груд. 29
Multiple Airlines Logo
5:45 am - 11:26 pmBOS-SAT
18h 41m1 stop
Multiple Airlines Logo
12:45 pm - 1:19 amSAT-BOS
11h 34m2 stops
$313Multiple Airlines
Find Deal
нд, груд. 14 - пн, груд. 29
Spirit Airlines Logo
8:11 pm - 2:15 pmBOS-SAT
19h 04m1 stop
Spirit Airlines Logo
12:45 pm - 10:01 amSAT-BOS
20h 16m1 stop
$315Spirit Airlines
Find Deal
пт, груд. 12 - вт, груд. 30
Spirit Airlines Logo
11:08 am - 11:26 pmBOS-SAT
13h 18m2 stops
Spirit Airlines Logo
5:40 am - 11:56 pmSAT-BOS
17h 16m2 stops
$316Spirit Airlines
Find Deal
пн, груд. 8 - чт, груд. 11
Spirit Airlines Logo
11:08 am - 11:26 pmBOS-SAT
13h 18m2 stops
Spirit Airlines Logo
12:37 pm - 11:56 pmSAT-BOS
34h 19m3 stops
$317Spirit Airlines
Find Deal
чт, груд. 4 - пн, груд. 8
Multiple Airlines Logo
8:11 pm - 8:15 amBOS-SAT
13h 04m1 stop
Multiple Airlines Logo
12:45 pm - 1:19 amSAT-BOS
11h 34m2 stops
$318Multiple Airlines
Find Deal
ср, груд. 10 - нд, груд. 28

Frontier flights from Boston to San Antonio

Our best Frontier deals on Boston to San Antonio flight tickets
Frontier
Nov 24
BOS6:00 amBoston Logan Intl
11h 08m
1 stop
SAT4:08 pmSan Antonio
Nov 28
SAT5:09 pmSan Antonio
6h 35m
1 stop
BOS12:44 amBoston Logan Intl
$332
Find similar
Frontier
Nov 21
BOS6:00 amBoston Logan Intl
11h 08m
1 stop
SAT4:08 pmSan Antonio
Nov 28
SAT5:09 pmSan Antonio
6h 35m
1 stop
BOS12:44 amBoston Logan Intl
$392
Find similar
Frontier
Nov 26
BOS6:00 amBoston Logan Intl
11h 08m
1 stop
SAT4:08 pmSan Antonio
Nov 28
SAT5:09 pmSan Antonio
6h 35m
1 stop
BOS12:44 amBoston Logan Intl
$422
Find similar

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
Dec 8
BOS5:45 amBoston Logan Intl
18h 41m
1 stop
SAT11:26 pmSan Antonio
Dec 14
SAT5:40 amSan Antonio
27h 23m
3 stops
BOS10:03 amBoston Logan Intl
$308
Find similar
Spirit Airlines
Dec 11
BOS5:45 amBoston Logan Intl
18h 41m
1 stop
SAT11:26 pmSan Antonio
Dec 30
SAT12:45 pmSan Antonio
20h 16m
1 stop
BOS10:01 amBoston Logan Intl
$311
Find similar
Spirit Airlines
Dec 11
BOS5:45 amBoston Logan Intl
18h 41m
1 stop
SAT11:26 pmSan Antonio
Dec 29
SAT12:45 pmSan Antonio
20h 16m
1 stop
BOS10:01 amBoston Logan Intl
$312
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 листопад 17, 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

пн 12/8

5:45 am-11:26 pm

1 stop18h 41m

San Antonio

нд 12/14

5:40 am-10:03 am

3 stops27h 23m

$308

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

чт 12/18

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

чт 1/1

5:20 am-11:59 am

1 stop5h 39m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

сб 12/13

8:11 pm-7:55 am

1 stop12h 44m

San Antonio

вт 12/30

2:39 pm-10:08 am

2 stops18h 29m

$310

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

чт 12/11

5:45 am-11:26 pm

1 stop18h 41m

San Antonio

вт 12/30

12:45 pm-10:01 am

1 stop20h 16m

$311

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

чт 12/11

5:45 am-11:26 pm

1 stop18h 41m

San Antonio

пн 12/29

12:45 pm-10:01 am

1 stop20h 16m

$312

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

нд 12/14

5:45 am-11:26 pm

1 stop18h 41m

San Antonio

пн 12/29

12:45 pm-1:19 am

2 stops11h 34m

$313

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

пт 12/12

8:11 pm-2:15 pm

1 stop19h 04m

San Antonio

вт 12/30

12:45 pm-10:01 am

1 stop20h 16m

$315

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

пн 12/8

11:08 am-11:26 pm

2 stops13h 18m

San Antonio

чт 12/11

5:40 am-11:56 pm

2 stops17h 16m

$316

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

чт 12/4

11:08 am-11:26 pm

2 stops13h 18m

San Antonio

пн 12/8

12:37 pm-11:56 pm

3 stops34h 19m

$317

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

ср 12/10

8:11 pm-8:15 am

1 stop13h 04m

San Antonio

нд 12/28

12:45 pm-1:19 am

2 stops11h 34m

$318

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 January instead. Flights to San Antonio in January, while not as cheap as those in July, still average around $338.

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 $385 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 $315 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 17% 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
8,145 reviews
Search Spirit Airlines flights
DeltaPriceFrom $239Free CancellationRating
7.9
8,008 reviews
Search Delta flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
SouthwestPriceFrom $246Free CancellationRating
8.0
4,245 reviews
Search Southwest flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
9,014 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 5 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

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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ср 12/17
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