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$72+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAT
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 August, booked 83 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 julio 3, 2025.

Round-trip from

$245
(FlightHub)

One-way from

$72
(Priceline)

Popular in

December

Cheapest in

September

Average price

$308

Good round-trip deal

$299 or less

Good one-way deal

$198 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. 6% potential increase in price ($23 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 July 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 julio 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/1. 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.
vie. 10/36:00 amBOS - SAT
1 stop13h 03mSpirit Airlines
dom. 10/57:08 pmSAT - BOS
1 stop15h 05mSpirit Airlines
Deal found 7/1$245
This Delta deal was found by Cheapflights users on 7/2. 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.
jue. 9/45:34 amBOS - SAT
1 stop7h 17mDelta
dom. 9/142:30 pmSAT - BOS
Nonstop4h 14mDelta
Deal found 7/2$249
This United Airlines deal was found by Cheapflights users on 7/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/63:45 pmBOS - SAT
1 stop6h 32mUnited Airlines
dom. 9/215:15 pmSAT - BOS
1 stop6h 30mUnited Airlines
Deal found 7/1$259
This FlightHub deal was found by Cheapflights users on 7/1. 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.
vie. 7/1810:18 amBOS - SAT
1 stop7h 34mMultiple Airlines
dom. 7/205:38 pmSAT - BOS
1 stop21h 05mMultiple Airlines
Deal found 7/1$275
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/95:54 amBOS - SAT
1 stop8h 25mAmerican Airlines
mié. 8/132:52 pmSAT - BOS
1 stop6h 16mAmerican Airlines
Deal found 7/2$279
This Southwest deal was found by Cheapflights users on 7/1. 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.
vie. 8/15:50 amBOS - SAT
1 stop6h 00mSouthwest
jue. 8/145:35 amSAT - BOS
2 stops8h 50mSouthwest
Deal found 7/1$293

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 julio 3, 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

jue. 9/18

6:55 pm-6:03 pm

1 stop24h 08m

San Antonio

dom. 9/21

7:08 pm-11:55 pm

1 stop27h 47m

$245

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

jue. 9/4

5:34 am-11:51 am

1 stop7h 17m

San Antonio

dom. 9/14

2:30 pm-7:44 pm

Nonstop4h 14m

$249

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

sáb. 9/6

3:45 pm-9:17 pm

1 stop6h 32m

San Antonio

dom. 9/21

5:15 pm-12:45 am

1 stop6h 30m

$259

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

vie. 7/18

10:18 am-4:52 pm

1 stop7h 34m

San Antonio

dom. 7/20

5:38 pm-3:43 pm

1 stop21h 05m

$275

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

sáb. 8/9

5:54 am-1:19 pm

1 stop8h 25m

San Antonio

mié. 8/13

2:52 pm-10:08 pm

1 stop6h 16m

$279

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

vie. 8/1

5:50 am-10:50 am

1 stop6h 00m

San Antonio

jue. 8/14

5:35 am-3:25 pm

2 stops8h 50m

$293

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

lun. 9/22

10:53 am-4:30 pm

1 stop6h 37m

$72

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

jue. 7/31

9:32 am-4:33 pm

1 stop8h 01m

$73

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

dom. 8/31

6:15 am-11:25 am

1 stop6h 10m

$130

BostonSan Antonio

BOS - SAT

BOSSAT

Boston Logan Intl

mié. 7/30

5:25 am-1:16 pm

1 stop8h 51m

$150

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 12 results
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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 June 27, 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 julio 3, 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 25% 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 June 29, 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 julio 3, 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
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,970 reviews
Southwest
8.0
Very good
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,845 reviews
Southwest
8.0
Very good
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,094 reviews
Southwest
8.0
Very good
4,270 reviews

Comfort

8.0

Boarding

8.2

Overall

8.0

Entertainment

7.6

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 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 $245. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $249 and $264, respectively. These flights start at 31% 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 Frontier, with whom users have recently found tickets for as low as $72. However, be on the lookout for offers from Spirit Airlines and Southwest, 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 $321, our data indicates the cheapest price to be $119. The most popular route (Boston Logan Intl - San Antonio), is priced around $213.

  • Where are the most common layover locations when flying from Boston to San Antonio?

    Flights departing from Boston and landing in San Antonio layover in Charlotte most frequently.

  • What are some popular things to do or see while on a layover in Charlotte?

    The majority of Charlotte visitors spend their time at Carowind, Mint Museum Uptown, and NASCAR Hall of Fame. Travelers on a layover in Charlotte can visit Carowind, Mint Museum Uptown, and NASCAR Hall of Fame, by traveling 8.2 mi, 5.4 mi, and 5.7 mi, respectively after landing at Charlotte Douglas. Those landing in Charlotte looking to spend some time exploring during their layover can rent a car for about $43 per day.

  • Where are the least popular layover locations for Boston to San Antonio flights?

    Boston to San Antonio flights that have layovers will least frequently stop in Dallas.

  • 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

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Alternative routes for Boston to San Antonio

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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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$137Average$259FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$196Average$333FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$206Average$370FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$216Average$323FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$375FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$257Average$420FlexibilityNo cancel feeOn-time63%

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