Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Boston to San Antonio from $103

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 5/21. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Boston to San Antonio

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Boston to San Antonio.
Spirit Airlines Logo
3:49 pm - 10:51 pmBOS-SAT
8h 02m1 stop
Spirit Airlines Logo
7:05 am - 2:44 pmSAT-BOS
6h 39m1 stop
$207Spirit Airlines
Find Deal
Thu, May 15 - Tue, May 20
Spirit Airlines Logo
3:49 pm - 10:51 pmBOS-SAT
8h 02m1 stop
Spirit Airlines Logo
7:05 am - 2:44 pmSAT-BOS
6h 39m1 stop
$209Spirit Airlines
Find Deal
Wed, May 7 - Fri, May 9
Spirit Airlines Logo
2:09 pm - 8:01 pmBOS-SAT
6h 52m1 stop
Spirit Airlines Logo
7:05 am - 2:44 pmSAT-BOS
6h 39m1 stop
$220Spirit Airlines
Find Deal
Sat, May 3 - Thu, May 8
Delta Logo
9:15 am - 12:43 pmBOS-SAT
4h 28mnonstop
Delta Logo
2:41 pm - 8:00 pmSAT-BOS
4h 19mnonstop
$239Delta
Find Deal
Wed, Jun 11 - Sat, Jun 14
Delta Logo
8:15 am - 5:08 pmBOS-SAT
9h 53m1 stop
Delta Logo
2:41 pm - 8:00 pmSAT-BOS
4h 19mnonstop
$249Delta
Find Deal
Wed, Jun 11 - Sat, Jun 14
Southwest Logo
5:00 am - 9:45 amBOS-SAT
5h 45m1 stop
Southwest Logo
5:30 pm - 12:05 amSAT-BOS
5h 35m1 stop
$259Southwest
Find Deal
Tue, Jun 17 - Fri, Jun 20
Southwest Logo
5:00 am - 11:40 amBOS-SAT
7h 40m1 stop
Southwest Logo
11:40 am - 10:15 pmSAT-BOS
9h 35m1 stop
$288Southwest
Find Deal
Tue, May 6 - Sat, May 31
American Airlines Logo
5:00 am - 12:34 pmBOS-SAT
8h 34m1 stop
American Airlines Logo
3:50 pm - 10:47 pmSAT-BOS
5h 57m1 stop
$318American Airlines
Find Deal
Fri, Jun 27 - Tue, Jul 1
United Airlines Logo
12:30 pm - 9:15 pmBOS-SAT
9h 45m2 stops
United Airlines Logo
2:25 pm - 9:21 pmSAT-BOS
5h 56m1 stop
$364United Airlines
Find Deal
Sat, May 17 - Mon, May 19
United Airlines Logo
12:29 pm - 10:57 pmBOS-SAT
11h 28m2 stops
United Airlines Logo
12:02 pm - 7:20 pmSAT-BOS
6h 18m1 stop
$404United Airlines
Find Deal
Wed, Jun 11 - Sat, Jun 14

Spirit Airlines flights from Boston to San Antonio

Our best Spirit Airlines deals on Boston to San Antonio flight tickets
Spirit Airlines
May 15
BOS3:49 pmBoston Logan Intl
8h 02m
1 stop
SAT10:51 pmSan Antonio
May 20
SAT7:05 amSan Antonio
6h 39m
1 stop
BOS2:44 pmBoston Logan Intl
Spirit Airlines
May 7
BOS3:49 pmBoston Logan Intl
8h 02m
1 stop
SAT10:51 pmSan Antonio
May 9
SAT7:05 amSan Antonio
6h 39m
1 stop
BOS2:44 pmBoston Logan Intl
Spirit Airlines
May 3
BOS2:09 pmBoston Logan Intl
6h 52m
1 stop
SAT8:01 pmSan Antonio
May 8
SAT7:05 amSan Antonio
6h 39m
1 stop
BOS2:44 pmBoston Logan Intl

Frontier flights from Boston to San Antonio

Our best Frontier deals on Boston to San Antonio flight tickets
Frontier
May 2
BOS6:00 amBoston Logan Intl
14h 31m
1 stop
SAT7:31 pmSan Antonio
May 5
SAT8:31 pmSan Antonio
27h 13m
1 stop
BOS12:44 amBoston Logan Intl
Frontier
Apr 28
BOS6:00 amBoston Logan Intl
13h 59m
1 stop
SAT6:59 pmSan Antonio
May 5
SAT8:31 pmSan Antonio
27h 13m
1 stop
BOS12:44 amBoston Logan Intl
Frontier
Apr 28
BOS6:00 amBoston Logan Intl
13h 59m
1 stop
SAT6:59 pmSan Antonio
May 2
SAT8:31 pmSan Antonio
27h 13m
1 stop
BOS12:44 amBoston Logan Intl

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 September, then book flights to San Antonio from Boston during August instead. Flights to San Antonio in August, while not as cheap as those in September, still average around $286.

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 $348. 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 $421.

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 evening, with an average ticket price of $383. Departure times in the evening 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 9 weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $352 when searching 9 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 $313 on momondo.

What cabin class options are available on Boston Logan Intl to San Antonio flights?

There are 3 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 April 2025, prices for Boston to San Antonio flights are approximately 4% 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

$103

Fastest flight time

4h 28m

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 $103. The best round-trip flight deal from Boston to San Antonio found on momondo in the last 72 hours is $207.
The fastest flight from Boston to San Antonio takes 4h 28m
Direct flights go from Boston to San Antonio every day.
There is 1 airport near San Antonio: San Antonio (SAT)

  • 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 28m.

  • 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 $137Free CancellationRating
6.3
7,926 reviews
Search Spirit Airlines flights
JetBluePriceFrom $200Free CancellationRating
7.3
2,926 reviews
Search JetBlue flights
United AirlinesPriceFrom $206Free CancellationRating
7.4
8,667 reviews
Search United Airlines flights
American AirlinesPriceFrom $215Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $239Free CancellationRating
8.0
7,916 reviews
Search Delta flights
SouthwestPriceFrom $257Free CancellationRating
8.0
4,280 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 1 Delta flight for this route in a normal week, average airfare is usually $377 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
Schertz
Boerne
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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Tue 4/22
Tue 4/29

Find better results for your trip to the United States