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$85+ 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
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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1. Tell us where you want to go

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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 Tuesday or Friday and return on a Thursday

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 October 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:59 amBOS - SAT
1 stop8h 17mMultiple Airlines
Mon 12/18:33 pmSAT - BOS
1 stop19h 17mMultiple Airlines
Deal found 10/19$302
This Mytrip deal was found by Cheapflights users on 10/19. 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.
Tue 11/255:45 amBOS - SAT
1 stop13h 47mSpirit Airlines
Mon 12/18:33 pmSAT - BOS
2 stops23h 16mSpirit Airlines
Deal found 10/19$303
This Mytrip deal was found by Cheapflights users on 10/19. 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.
Wed 12/35:45 amBOS - SAT
1 stop13h 47mSpirit Airlines
Wed 12/106:10 pmSAT - BOS
3 stops28h 47mSpirit Airlines
Deal found 10/19$305
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/279:54 pmBOS - SAT
2 stops22h 27mSpirit Airlines
Tue 12/27:37 pmSAT - BOS
1 stop27h 16mSpirit Airlines
Deal found 10/19$306
This Mytrip deal was found by Cheapflights users on 10/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1112:00 pmBOS - SAT
3 stops31h 32mSpirit Airlines
Wed 11/197:37 pmSAT - BOS
3 stops24h 12mSpirit Airlines
Deal found 10/18$307
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:20 amBOS - SAT
Nonstop4h 57mDelta
Mon 12/155:20 amSAT - BOS
1 stop5h 39mDelta
Deal found 10/19$309
This Mytrip deal was found by Cheapflights users on 10/19. 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.
Tue 11/186:00 amBOS - SAT
3 stops29h 03mSpirit Airlines
Tue 11/257:37 pmSAT - BOS
2 stops15h 58mSpirit Airlines
Deal found 10/19$310
This Mytrip deal was found by Cheapflights users on 10/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:54 pmBOS - SAT
2 stops21h 38mSpirit Airlines
Tue 12/27:37 pmSAT - BOS
3 stops24h 12mSpirit Airlines
Deal found 10/18$311
This Mytrip deal was found by Cheapflights users on 10/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:55 pmBOS - SAT
3 stops27h 37mSpirit Airlines
Mon 11/178:10 pmSAT - BOS
2 stops13h 55mSpirit Airlines
Deal found 10/18$312
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/269:54 pmBOS - SAT
2 stops21h 38mSpirit Airlines
Tue 12/27:37 pmSAT - BOS
1 stop27h 16mSpirit Airlines
Deal found 10/19$313
This Mytrip deal was found by Cheapflights users on 10/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:26 pmBOS - SAT
3 stops21h 02mSpirit Airlines
Thu 11/207:37 pmSAT - BOS
2 stops24h 12mSpirit Airlines
Deal found 10/18$314
This Kiwi.com deal was found by Cheapflights users on 10/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:45 amBOS - SAT
1 stop13h 47mMultiple Airlines
Wed 12/106:10 pmSAT - BOS
2 stops40h 45mMultiple Airlines
Deal found 10/19$316

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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$302
(Kiwi.com)

One-way from

$85
(Frontier)

Popular in

December

Cheapest in

January

Average price

$449

Good round-trip deal

$409 or less

Good one-way deal

$208 or less
Provider with most accurate pricing for Boston Logan Intl-San Antonio flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-San Antonio flights.
Search Deals
From Boston Logan Intl to San Antonio
Search Deals
One-way flight from Boston Logan Intl to San Antonio
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to San Antonio.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to San Antonio.
Search Deals

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 October 20, 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 12/17

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Mon 12/22

4:45 pm-1:07 am

1 stop7h 22m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Thu 12/4

6:10 am-5:10 pm

1 stop12h 00m

San Antonio

Mon 12/8

2:15 pm-7:18 pm

Nonstop4h 03m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 12/19

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Thu 12/25

1:33 pm-9:08 pm

1 stop6h 35m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Wed 12/3

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Wed 12/10

5:10 am-12:30 pm

1 stop6h 20m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sun 12/7

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Sat 12/13

3:30 pm-1:27 am

1 stop8h 57m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 12/19

9:20 am-1:17 pm

Nonstop4h 57m

San Antonio

Wed 12/24

2:51 pm-10:02 pm

1 stop6h 11m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 1/16

11:46 am-3:46 pm

Nonstop5h 00m

San Antonio

Tue 1/20

12:10 pm-10:33 pm

1 stop9h 23m

$309

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 12/12

6:10 am-5:10 pm

1 stop12h 00m

San Antonio

Sun 12/14

12:45 pm-11:41 pm

1 stop9h 56m

$319

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Fri 12/19

5:29 am-10:56 am

1 stop6h 27m

San Antonio

Mon 12/22

4:45 pm-1:07 am

1 stop7h 22m

$319

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

Sat 11/15

9:23 am-5:10 pm

1 stop8h 47m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 20 results
1
2

Compare providers for flights from Boston to San Antonio

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to San Antonio in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-San Antonio flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 17, 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 $129). Flying from Boston to San Antonio in May is currently the most expensive (average of $230). 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 October 20, 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 October 12, 2025.

Travelers seeking maximum savings on their Boston to San Antonio flight should consider departing on Wednesday at noon when fares are most often at their lowest. Tuesday at noon 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 October 20, 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
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
4,239 reviews
Southwest
8.0
Very good
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
7.9
Good
7,978 reviews
Southwest
8.0
Very good
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
8,991 reviews
Southwest
8.0
Very good
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
11,024 reviews
Southwest
8.0
Very good
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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
8,095 reviews
Southwest
8.0
Very good
4,239 reviews

Comfort

8.0

Food

7.0

Crew

8.6

Overall

8.0

Boarding

8.1

Entertainment

7.5

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.

  • 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 57m. 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 $161. Additional round-trip tickets that might be worth considering are offered by Delta and Southwest, with the lowest prices starting at $239 and $246, respectively. These flights start at 57% 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 $385, our data indicates the cheapest price to be $188. The most popular route (Boston Logan Intl - San Antonio), is priced around $194.

  • 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 $129). Flying from Boston to San Antonio in May is currently the most expensive (average of $230). 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 5 airlines flying from Boston to San Antonio

Discover the top 5 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$161Average$276FlexibilityNo cancel feeOn-time65%
DeltaCheapest$239Average$390FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$246Average$417FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$254Average$490FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$257Average$381FlexibilityNo cancel feeOn-time71%

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