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Cheap flights from Boston to San Antonio from $89

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 1/24. 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
3:43 pm - 11:52 pmBOS-SAT
9h 09m1 stop
Spirit Airlines Logo
6:30 am - 11:57 pmSAT-BOS
16h 27m2 stops
$266Spirit Airlines
Find Deal
Fri, Jan 23 - Tue, Jan 27
Multiple Airlines Logo
6:00 am - 5:03 pmBOS-SAT
12h 03m1 stop
Multiple Airlines Logo
10:26 am - 11:57 pmSAT-BOS
12h 31m1 stop
$267Multiple Airlines
Find Deal
Mon, Jan 26 - Sat, Feb 28
Spirit Airlines Logo
6:06 pm - 9:40 amBOS-SAT
16h 34m1 stop
Spirit Airlines Logo
10:26 am - 11:57 pmSAT-BOS
12h 31m1 stop
$268Spirit Airlines
Find Deal
Thu, Jan 29 - Sat, Feb 28
Spirit Airlines Logo
7:00 am - 9:40 amBOS-SAT
27h 40m3 stops
Spirit Airlines Logo
10:35 am - 11:57 pmSAT-BOS
12h 22m1 stop
$271Spirit Airlines
Find Deal
Sat, Jan 10 - Thu, Jan 15
Spirit Airlines Logo
11:08 am - 11:26 pmBOS-SAT
13h 18m2 stops
Spirit Airlines Logo
10:35 am - 11:57 pmSAT-BOS
12h 22m1 stop
$275Spirit Airlines
Find Deal
Mon, Dec 15 - Sat, Jan 17
Multiple Airlines Logo
8:11 pm - 12:56 pmBOS-SAT
41h 45m2 stops
Multiple Airlines Logo
1:55 pm - 11:56 pmSAT-BOS
9h 01m1 stop
$277Multiple Airlines
Find Deal
Tue, Dec 9 - Fri, Dec 12
Spirit Airlines Logo
5:28 am - 11:52 pmBOS-SAT
19h 24m2 stops
Spirit Airlines Logo
6:30 am - 11:57 pmSAT-BOS
16h 27m2 stops
$279Spirit Airlines
Find Deal
Thu, Jan 15 - Sat, Jan 17
Spirit Airlines Logo
11:08 am - 11:26 pmBOS-SAT
13h 18m2 stops
Spirit Airlines Logo
1:55 pm - 7:06 pmSAT-BOS
28h 11m3 stops
$280Spirit Airlines
Find Deal
Thu, Dec 11 - Fri, Dec 12
Multiple Airlines Logo
8:11 pm - 1:14 pmBOS-SAT
42h 03m2 stops
Multiple Airlines Logo
10:35 am - 11:57 pmSAT-BOS
12h 22m1 stop
$281Multiple Airlines
Find Deal
Tue, Dec 16 - Sat, Jan 17
Spirit Airlines Logo
11:55 am - 11:26 pmBOS-SAT
12h 31m1 stop
Spirit Airlines Logo
6:30 am - 2:38 pmSAT-BOS
7h 08m1 stop
$282Spirit Airlines
Find Deal
Tue, Jan 6 - Wed, Jan 14

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
Jan 23
BOS3:43 pmBoston Logan Intl
9h 09m
1 stop
SAT11:52 pmSan Antonio
Jan 27
SAT6:30 amSan Antonio
16h 27m
2 stops
BOS11:57 pmBoston Logan Intl
$266
Find similar
Spirit Airlines
Jan 29
BOS6:06 pmBoston Logan Intl
16h 34m
1 stop
SAT9:40 amSan Antonio
Feb 28
SAT10:26 amSan Antonio
12h 31m
1 stop
BOS11:57 pmBoston Logan Intl
$268
Find similar
Spirit Airlines
Jan 10
BOS7:00 amBoston Logan Intl
27h 40m
3 stops
SAT9:40 amSan Antonio
Jan 15
SAT10:35 amSan Antonio
12h 22m
1 stop
BOS11:57 pmBoston Logan Intl
$271
Find similar

Frontier flights from Boston to San Antonio

Our best Frontier deals on Boston to San Antonio flight tickets
Frontier
Dec 23
BOS12:08 pmBoston Logan Intl
31h 08m
1 stop
SAT6:16 pmSan Antonio
Dec 31
SAT5:56 pmSan Antonio
6h 18m
1 stop
BOS1:14 amBoston Logan Intl
$287
Find similar
Frontier
Dec 23
BOS12:08 pmBoston Logan Intl
31h 08m
1 stop
SAT6:16 pmSan Antonio
Dec 31
SAT6:45 amSan Antonio
17h 29m
2 stops
BOS1:14 amBoston Logan Intl
$302
Find similar
Frontier
Dec 1
BOS6:00 amBoston Logan Intl
11h 08m
1 stop
SAT4:08 pmSan Antonio
Dec 11
SAT9:10 amSan Antonio
23h 47m
1 stop
BOS9:57 amBoston Logan Intl
$425
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 November 26, 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

Fri 1/23

3:43 pm-11:52 pm

1 stop9h 09m

San Antonio

Tue 1/27

6:30 am-11:57 pm

2 stops16h 27m

$266

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 1/26

6:00 am-5:03 pm

1 stop12h 03m

San Antonio

Sat 2/28

10:26 am-11:57 pm

1 stop12h 31m

$267

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 1/29

6:06 pm-9:40 am

1 stop16h 34m

San Antonio

Sat 2/28

10:26 am-11:57 pm

1 stop12h 31m

$268

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 1/10

7:00 am-9:40 am

3 stops27h 40m

San Antonio

Thu 1/15

10:35 am-11:57 pm

1 stop12h 22m

$271

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 12/15

11:08 am-11:26 pm

2 stops13h 18m

San Antonio

Sat 1/17

10:35 am-11:57 pm

1 stop12h 22m

$275

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 12/9

8:11 pm-12:56 pm

2 stops41h 45m

San Antonio

Fri 12/12

1:55 pm-11:56 pm

1 stop9h 01m

$277

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 1/15

5:28 am-11:52 pm

2 stops19h 24m

San Antonio

Sat 1/17

6:30 am-11:57 pm

2 stops16h 27m

$279

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 12/11

11:08 am-11:26 pm

2 stops13h 18m

San Antonio

Fri 12/12

1:55 pm-7:06 pm

3 stops28h 11m

$280

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 12/16

8:11 pm-1:14 pm

2 stops42h 03m

San Antonio

Sat 1/17

10:35 am-11:57 pm

1 stop12h 22m

$281

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 1/6

11:55 am-11:26 pm

1 stop12h 31m

San Antonio

Wed 1/14

6:30 am-2:38 pm

1 stop7h 08m

$282

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 $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

$223

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 $223. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $349.
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 59m.

  • 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
5.8
3,099 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $160Free CancellationRating
6.3
8,158 reviews
Search Spirit Airlines flights
DeltaPriceFrom $239Free CancellationRating
7.9
7,998 reviews
Search Delta flights
SouthwestPriceFrom $248Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
American AirlinesPriceFrom $258Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
United AirlinesPriceFrom $274Free CancellationRating
7.4
9,046 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 3 Delta flights for this route in a normal week, average airfare is usually $394 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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