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$89+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Boston Logan Intl to San Antonio are usually found in January or July, booked 77 days in advance, depart on a Wednesday or Friday 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 September 16, 2025.

Round-trip from

$270
(KAYAK)

One-way from

$89
(Frontier)

Popular in

December

Cheapest in

January

Average price

$337

Good round-trip deal

$259 or less

Good one-way deal

$243 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 ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:16 amBOS - SAT
1 stop13h 14mSpirit Airlines
Mon 11/37:35 pmSAT - BOS
1 stop14h 41mSpirit Airlines
Deal found 9/14$270
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/223:00 pmBOS - SAT
1 stop28h 30mSpirit Airlines
Wed 11/56:00 amSAT - BOS
1 stop15h 08mSpirit Airlines
Deal found 9/15$272
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2910:53 amBOS - SAT
1 stop6h 37mFrontier
Thu 10/211:33 amSAT - BOS
2 stops19h 19mFrontier
Deal found 9/15$275
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Sun 10/58:47 amBOS - SAT
2 stops32h 43mMultiple Airlines
Fri 10/107:35 pmSAT - BOS
1 stop27h 24mMultiple Airlines
Deal found 9/15$276
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 9/296:10 amBOS - SAT
1 stop13h 02mSpirit Airlines
Fri 10/37:17 pmSAT - BOS
1 stop27h 40mSpirit Airlines
Deal found 9/12$278
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/236:16 amBOS - SAT
1 stop13h 14mMultiple Airlines
Mon 10/275:45 pmSAT - BOS
2 stops16h 31mMultiple Airlines
Deal found 9/13$279
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/316:16 amBOS - SAT
1 stop13h 14mMultiple Airlines
Sun 11/24:55 pmSAT - BOS
2 stops17h 40mMultiple Airlines
Deal found 9/14$280
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:16 amBOS - SAT
1 stop13h 14mSpirit Airlines
Mon 10/207:35 pmSAT - BOS
2 stops16h 45mSpirit Airlines
Deal found 9/14$281
This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2910:53 amBOS - SAT
1 stop6h 37mFrontier
Fri 10/35:40 pmSAT - BOS
1 stop13h 03mFrontier
Deal found 9/14$282
This KAYAK deal was found by Cheapflights users on 9/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:45 amBOS - SAT
2 stops24h 24mSpirit Airlines
Fri 12/124:16 pmSAT - BOS
1 stop17h 08mSpirit Airlines
Deal found 9/14$283
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 11/55:45 amBOS - SAT
1 stop10h 26mSpirit Airlines
Sun 11/94:16 pmSAT - BOS
2 stops24h 46mSpirit Airlines
Deal found 9/14$284
This KAYAK deal was found by Cheapflights users on 9/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:16 amBOS - SAT
1 stop13h 14mSpirit Airlines
Sun 10/267:35 pmSAT - BOS
1 stop14h 41mSpirit Airlines
Deal found 9/13$285

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 September 16, 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

Sat 10/25

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Sat 11/1

1:50 pm-7:00 pm

Nonstop4h 10m

$299

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/15

9:17 am-1:07 pm

Nonstop4h 50m

San Antonio

Tue 11/18

2:00 pm-6:59 pm

Nonstop3h 59m

$299

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 12/7

9:20 am-1:20 pm

Nonstop5h 00m

San Antonio

Sat 12/13

2:00 pm-7:06 pm

Nonstop4h 06m

$299

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 10/22

5:30 am-12:00 pm

2 stops7h 30m

San Antonio

Wed 11/5

8:20 am-5:20 pm

2 stops8h 00m

$307

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Tue 10/28

5:15 am-11:45 am

2 stops7h 30m

San Antonio

Wed 11/5

8:20 am-5:20 pm

2 stops8h 00m

$307

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/1

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Mon 11/10

5:54 pm-6:30 am

1 stop11h 36m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 10/22

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Mon 10/27

5:09 pm-1:13 am

1 stop7h 04m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/1

9:15 am-12:55 pm

Nonstop4h 40m

San Antonio

Sat 11/8

5:14 am-2:10 pm

1 stop7h 56m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 11/19

5:45 am-3:11 pm

1 stop10h 26m

$102

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 12/13

5:45 am-3:11 pm

1 stop10h 26m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 18 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 September 12, 2025.

The best time to book flights from Boston to San Antonio is 77 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 September 16, 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 27% 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 September 14, 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 September 16, 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
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,015 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 30m is how long a nonstop flight from Boston to San Antonio typically takes.

  • How long is the flight from Boston to San Antonio?

    There are many flights that can get you from Boston to San Antonio in 4h 40m. Fly via Delta to get the fastest option. The distance from Boston to San Antonio is about 1761 mi. Most flights are nonstop.

  • 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 $160. Additional round-trip tickets that might be worth considering are offered by JetBlue and Delta, with the lowest prices starting at $204 and $239, respectively. These flights start at 57% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Boston to San Antonio one-way?

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $102. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Boston to San Antonio for a low price.

  • 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 $347, our data indicates the cheapest price to be $178. The most popular route (Boston Logan Intl - San Antonio), is priced around $212.

  • 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$160Average$275FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$204Average$488FlexibilityNo cancel feeOn-time62%
DeltaCheapest$239Average$384FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$254Average$469FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$254Average$413FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$257Average$368FlexibilityNo cancel feeOn-time71%

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