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$73+ Cheap flights from Boston to San Antonio (BOS - SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAT
Aug 24 — Aug 311
Sun 8/24
Sun 8/31
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Antonio are usually found in September or January, booked 83 days in advance, depart on a Friday or Wednesday and return on a Saturday

Cheap flight deals from Boston to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 19, 2025.

Round-trip from

$266
(FlightHub)

One-way from

$73
(Priceline)

Popular in

December

Cheapest in

September

Average price

$327

Good round-trip deal

$259 or less

Good one-way deal

$183 or less
From Boston Logan Intl to San Antonio
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One-way flight from Boston Logan Intl to San Antonio
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Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Boston Logan Intl to San Antonio.
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Price to beat on a one-way flight from Boston Logan Intl to San Antonio.
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Find flight deals from Boston to San Antonio

Cheapest flights from Boston to San Antonio
Explore the most affordable flight options available from Boston to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/173:00 pmBOS - SAT
1 stop28h 12mMultiple Airlines
Sun 9/218:20 pmSAT - BOS
2 stops12h 38mMultiple Airlines
Deal found 8/17$266
This Kiwi.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:53 pmBOS - SAT
1 stop21h 47mMultiple Airlines
Sun 9/218:20 pmSAT - BOS
2 stops12h 38mMultiple Airlines
Deal found 8/17$267
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:10 amBOS - SAT
1 stop13h 02mMultiple Airlines
Fri 9/125:40 pmSAT - BOS
2 stops16h 33mMultiple Airlines
Deal found 8/18$268
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:00 amBOS - SAT
1 stop6h 28mDelta
Wed 10/294:35 pmSAT - BOS
1 stop6h 14mDelta
Deal found 8/18$269
This FlightHub deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/168:24 pmBOS - SAT
2 stops20h 31mSpirit Airlines
Mon 10/205:00 pmSAT - BOS
1 stop19h 44mSpirit Airlines
Deal found 8/18$270
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:15 amBOS - SAT
Nonstop4h 40mDelta
Tue 10/286:21 pmSAT - BOS
1 stop5h 52mDelta
Deal found 8/18$271
This FlightHub deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1712:20 pmBOS - SAT
1 stop26h 29mSpirit Airlines
Sun 9/217:17 pmSAT - BOS
1 stop14h 56mSpirit Airlines
Deal found 8/17$272
This Southwest deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:20 amBOS - SAT
2 stops7h 55mSouthwest
Tue 9/232:40 pmSAT - BOS
1 stop5h 55mSouthwest
Deal found 8/17$273
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:50 amBOS - SAT
1 stop8h 00mMultiple Airlines
Sun 11/25:00 pmSAT - BOS
2 stops17h 35mMultiple Airlines
Deal found 8/18$274
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:22 pmBOS - SAT
1 stop6h 58mDelta
Wed 10/295:25 amSAT - BOS
1 stop5h 35mDelta
Deal found 8/18$275
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/42:53 pmBOS - SAT
3 stops26h 54mSpirit Airlines
Mon 10/67:19 pmSAT - BOS
1 stop15h 07mSpirit Airlines
Deal found 8/19$276
This Kiwi.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2412:49 pmBOS - SAT
2 stops16h 58mMultiple Airlines
Thu 10/305:00 pmSAT - BOS
1 stop19h 44mMultiple Airlines
Deal found 8/18$277

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
Use the filters below to find and compare flights from Boston to San Antonio that are best for you.

Fly from

Boston

Fly to

San Antonio

Route

Depart

Return

Price

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 9/17

3:00 pm-6:12 pm

1 stop28h 12m

San Antonio

Sun 9/21

8:20 pm-9:58 am

2 stops12h 38m

$266

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 10/23

12:22 pm-4:50 pm

2 stops29h 28m

San Antonio

Mon 10/27

7:10 pm-1:44 pm

1 stop17h 34m

$267

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 9/18

2:53 pm-11:40 am

1 stop21h 47m

San Antonio

Sun 9/21

8:20 pm-9:58 am

2 stops12h 38m

$267

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Mon 9/8

6:10 am-6:12 pm

1 stop13h 02m

San Antonio

Fri 9/12

5:40 pm-11:13 am

2 stops16h 33m

$268

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 10/26

9:50 am-4:50 pm

1 stop8h 00m

San Antonio

Thu 10/30

5:00 pm-1:44 pm

1 stop19h 44m

$268

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 10/30

5:40 am-11:28 am

1 stop6h 48m

San Antonio

Tue 11/4

1:50 pm-6:59 pm

Nonstop4h 09m

$269

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 9/12

9:15 am-12:45 pm

Nonstop4h 30m

San Antonio

Tue 9/16

6:05 pm-6:25 am

1 stop11h 20m

$269

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 10/25

5:40 am-1:28 pm

1 stop8h 48m

San Antonio

Fri 10/31

12:02 pm-10:27 pm

1 stop9h 25m

$269

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/28

5:34 am-10:40 am

1 stop6h 06m

San Antonio

Sat 11/1

12:40 pm-11:48 pm

1 stop10h 08m

$269

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 11/5

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Mon 11/10

4:00 pm-11:34 pm

1 stop6h 34m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 17 results
1
2

Best time to book a flight from Boston to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to San Antonio

How far ahead should I book a flight from Boston to San Antonio?

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Antonio. Price data was last updated on August 8, 2025.

The best time to book flights from Boston to San Antonio is 83 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Boston to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Boston to San Antonio (average of $295). Flying from Boston to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOS to SAT?

Find hourly flight availability from Boston to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 19, 2025.

When flying from Boston to San Antonio, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 26% versus a flight in the morning.

What is the cheapest day to fly from Boston to San Antonio?

Use this chart to determine the cheapest time to fly round-trip from Boston to San Antonio. Price data was last updated on August 17, 2025.

Travelers seeking maximum savings on their Boston to San Antonio flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated August 19, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Boston to San Antonio to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,922 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
JetBlue
7.2
Good
2,915 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Boston to San Antonio?

    If you wish to fly to San Antonio from Boston, then you need to book flights from Boston Logan Intl to San Antonio. There is 1 flight from Logan Intl (BOS) to San Antonio (SAT) per day to choose from. Flights to San Antonio from Logan Intl are available from 6 different airlines, which means you should have some options if you want to compare airfare deals. 4h 25m is how long a nonstop flight from Boston to San Antonio typically takes.

  • What are the cheapest airlines flying from Boston to San Antonio round-trip?

    Flying on Spirit Airlines is currently your cheapest option to San Antonio, with prices starting at $158. Additional round-trip tickets that might be worth considering are offered by JetBlue and United Airlines, with the lowest prices starting at $186 and $206, respectively. These flights start at 56% lower than the current average price 3 months from now.

  • What are the cheapest flights from Boston to San Antonio?

    Looking for the cheapest flight from Boston to San Antonio? While on average our users pay $430, our data indicates the cheapest price to be $119. The most popular route (Boston Logan Intl - San Antonio), is priced around $186.

  • Can I find deals for flights from Boston to San Antonio that include hotel bookings?

    Yes. In addition to deals on Boston to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Antonio?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Antonio.

  • Can I find deals for business class flights from Boston to San Antonio?

    Yes. Cheapflights offers flight deals from Boston to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to San Antonio?

    Currently, August is the cheapest month in which you can book a flight from Boston to San Antonio (average of $295). Flying from Boston to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville

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Alternative routes for Boston to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Boston to San Antonio

Discover the top 6 airlines that operate flights from Boston to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$158Average$272FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$186Average$380FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$206Average$423FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$226Average$347FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$379FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$256Average$406FlexibilityNo cancel feeOn-time63%

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