$56+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SAT
gen 20 — gen 271
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Boston to San Antonio with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Boston Logan Intl to San Antonio are usually found in July or January, booked 56 days in advance, depart on a Friday or Tuesday and return on a Saturday
Cheap flight deals from Boston to San Antonio
Cheapest flights from Boston to San AntonioExplore 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 dicembre 21, 2025.
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 dicembre 21, 2025.
This Frontier deal was found by Cheapflights users on 12/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer 12/316:00 amBOS - SAT
1 stop12h 01mFrontier
lun 1/55:56 pmSAT - BOS
1 stop6h 23mFrontier
Deal found 12/18![Frontier logo]()
$363
This Frontier deal was found by Cheapflights users on 12/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven 12/196:00 amBOS - SAT
1 stop12h 01mFrontier
mer 12/247:11 pmSAT - BOS
1 stop13h 41mFrontier
Deal found 12/18![Frontier logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 12/19. 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.
mer 12/316:00 amBOS - SAT
1 stop12h 01mFrontier
gio 1/110:18 amSAT - BOS
2 stops20h 05mFrontier
Deal found 12/19![Frontier logo]()
$438
This Frontier deal was found by Cheapflights users on 12/20. 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.
lun 12/226:00 amBOS - SAT
1 stop12h 01mFrontier
ven 12/265:56 pmSAT - BOS
1 stop6h 18mFrontier
Deal found 12/20![Frontier logo]()
$492
This Trip.com deal was found by Cheapflights users on 12/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven 12/266:00 amBOS - SAT
1 stop12h 01mFrontier
lun 12/297:11 pmSAT - BOS
1 stop13h 56mFrontier
Deal found 12/19![Frontier logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 12/19. 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.
ven 12/266:00 amBOS - SAT
1 stop12h 01mFrontier
gio 1/110:18 amSAT - BOS
2 stops20h 05mFrontier
Deal found 12/19![Frontier logo]()
$516
This Trip.com deal was found by Cheapflights users on 12/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven 12/266:00 amBOS - SAT
2 stops18h 26mMultiple Airlines
lun 12/297:11 pmSAT - BOS
1 stop13h 56mMultiple Airlines
Deal found 12/19![Multiple Airlines logo]()
$538
This Frontier deal was found by Cheapflights users on 12/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/226:00 amBOS - SAT
1 stop12h 01mFrontier
lun 1/55:56 pmSAT - BOS
1 stop6h 23mFrontier
Deal found 12/19![Frontier logo]()
$542
This American Airlines deal was found by Cheapflights users on 12/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer 12/315:20 amBOS - SAT
1 stop12h 33mAmerican Airlines
gio 1/18:43 amSAT - BOS
1 stop9h 35mAmerican Airlines
Deal found 12/19![American Airlines logo]()
$545
This Priceline deal was found by Cheapflights users on 12/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 12/2911:55 amBOS - SAT
1 stop12h 31mMultiple Airlines
mer 12/315:56 pmSAT - BOS
1 stop6h 18mMultiple Airlines
Deal found 12/20![Multiple Airlines logo]()
$551
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
dom 12/2112:22 pmBOS - SAT
1 stop30h 54mFrontier
gio 1/110:18 amSAT - BOS
2 stops20h 05mFrontier
Deal found 12/20![Frontier logo]()
$566
Find 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 dicembre 21, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $268 (CheapOair) |
One-way from | $56 (Super.com) |
Popular in | December |
Cheapest in | July |
Average price | $505 |
Good round-trip deal | $299 or less |
Good one-way deal | $223 or less |
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 dicembre 21, 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
mar 1/20
11:46 am-3:45 pm
Nonstop4h 59m
San Antonio
ven 1/30
12:25 pm-5:19 pm
Nonstop3h 54m
$272
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
ven 1/23
11:46 am-3:45 pm
Nonstop4h 59m
San Antonio
mer 1/28
12:25 pm-5:19 pm
Nonstop3h 54m
$272
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
ven 2/6
5:29 am-11:26 am
1 stop6h 57m
San Antonio
mer 2/11
12:25 pm-5:19 pm
Nonstop3h 54m
$282
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
gio 1/22
11:46 am-3:45 pm
Nonstop4h 59m
San Antonio
mar 1/27
12:25 pm-5:19 pm
Nonstop3h 54m
$299
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
sab 1/24
7:00 am-11:07 am
Nonstop5h 07m
San Antonio
lun 1/26
12:25 pm-5:19 pm
Nonstop3h 54m
$299
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
sab 3/7
7:00 am-11:07 am
Nonstop5h 07m
San Antonio
ven 4/3
12:22 pm-5:22 pm
Nonstop4h 00m
$299
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
gio 1/29
11:46 am-3:45 pm
Nonstop4h 59m
San Antonio
dom 2/1
12:25 pm-5:19 pm
Nonstop3h 54m
$299
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
gio 2/5
11:46 am-3:45 pm
Nonstop4h 59m
San Antonio
mar 2/10
12:25 pm-5:19 pm
Nonstop3h 54m
$299
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
sab 3/7
11:15 am-4:52 pm
1 stop6h 37m
San Antonio
sab 4/4
12:22 pm-5:22 pm
Nonstop4h 00m
$309
BostonSan Antonio
BOS - SAT
BOSSAT
Boston Logan Intl
gio 3/19
5:30 am-11:25 am
1 stop6h 55m
San Antonio
mer 3/25
12:22 pm-5:22 pm
Nonstop4h 00m
$309
Showing 1-10 of 19 results
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 December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Boston-San Antonio flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Boston-San Antonio flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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
Prices
More
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 December 19, 2025.
The best time to book flights from Boston to San Antonio is 56 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 $228). 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 dicembre 21, 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 December 20, 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.
What’s the top layover airport for flights from Boston to San Antonio?
Share of 1-stop round-trip flights from Boston to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.
Nashville (BNA) – chosen by Cheapflights users on 60% of 1-stop itineraries from Boston to San Antonio on Cheapflights.
What’s the cheapest layover airport for flights from Boston to San Antonio?
Average round-trip fare for 1-stop flights from Boston to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Orlando (MCO) is the most affordable 1-stop option, with an average round-trip price of $203.
What’s the fastest layover option from Boston to San Antonio?
Shortest average travel time for 1-stop one-way flights from Boston to San Antonio, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Nashville (BNA) have the shortest average one-way travel time for 1-stop routes: 6h 07m.
Which airport typically offers the quickest layover for flights from Boston to San Antonio?
Average layover duration for 1-stop one-way flights from Boston to San Antonio, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Nashville (BNA) offer the fastest connection on this route, with an average layover time of 0h 48m.
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 dicembre 21, 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.
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Boston to San Antonio
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Boston to San Antonio
Discover the top 7 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 dicembre 21, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$102 | Average$268 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$160 | Average$252 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$227 | Average$227 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$239 | Average$390 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$243 | Average$419 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$258 | Average$491 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$380 | FlexibilityNo cancel fee | On-time71% |