$80 Cheap Flights from Boston (BOS) to San Antonio (SAT)

View $80 flight on Fri, Jan 23, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to San Antonio International Airport (SAT)

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Cheap Flights from Boston to San Antonio (BOS-SAT)

Prices were available within the past 7 days and start at $80 for one-way flights and $140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Tue, Jan 13 - Wed, Jan 14
BOS
Boston
SAT
San Antonio
$140 Roundtrip, found 16 hours ago
$140
Roundtrip
found 16 hours ago
Select Spirit Airlines flight, departing Tue, Jan 13 from Boston to San Antonio, returning Wed, Jan 14, priced at $140 found 16 hours ago
Frontier Airlines
Fri, Jan 23 - Mon, Feb 2
BOS
Boston
SAT
San Antonio
$148 Roundtrip, found 1 hour ago
$148
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Boston to San Antonio, returning Mon, Feb 2, priced at $148 found 1 hour ago
Spirit Airlines
Tue, Feb 3 - Fri, Feb 6
BOS
Boston
SAT
San Antonio
$149 Roundtrip, found 16 hours ago
$149
Roundtrip
found 16 hours ago
Select Spirit Airlines flight, departing Tue, Feb 3 from Boston to San Antonio, returning Fri, Feb 6, priced at $149 found 16 hours ago
Frontier Airlines
Mon, Feb 2 - Wed, Feb 4
BOS
Boston
SAT
San Antonio
$155 Roundtrip, found 18 hours ago
$155
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Mon, Feb 2 from Boston to San Antonio, returning Wed, Feb 4, priced at $155 found 18 hours ago
Frontier Airlines
Sun, Feb 1 - Wed, Feb 4
BOS
Boston
SAT
San Antonio
$157 Roundtrip, found 16 hours ago
$157
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Sun, Feb 1 from Boston to San Antonio, returning Wed, Feb 4, priced at $157 found 16 hours ago
Frontier Airlines
Fri, Jan 23 - Mon, Feb 2
BOS
Boston
SAT
San Antonio
$158 Roundtrip, found 1 hour ago
$158
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Boston to San Antonio, returning Mon, Feb 2, priced at $158 found 1 hour ago
Spirit Airlines
Sat, Feb 7 - Mon, Feb 9
BOS
Boston
SAT
San Antonio
$159 Roundtrip, found 18 hours ago
$159
Roundtrip
found 18 hours ago
Select Spirit Airlines flight, departing Sat, Feb 7 from Boston to San Antonio, returning Mon, Feb 9, priced at $159 found 18 hours ago
Southwest Airlines
Tue, Jan 27 - Fri, Jan 30
BOS
Boston
SAT
San Antonio
$172 Roundtrip, just found
$172
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Jan 27 from Boston to San Antonio, returning Fri, Jan 30, priced at $172 just found
American Airlines
Tue, Jan 13 - Thu, Jan 15
BOS
Boston
SAT
San Antonio
$199 Roundtrip, just found
$199
Roundtrip
just found
Select American Airlines flight, departing Tue, Jan 13 from Boston to San Antonio, returning Thu, Jan 15, priced at $199 just found
Delta
Sat, Jan 10 - Mon, Jan 12
BOS
Boston
SAT
San Antonio
$299 Roundtrip, just found
$299
Roundtrip
just found
Select Delta flight, departing Sat, Jan 10 from Boston to San Antonio, returning Mon, Jan 12, priced at $299 just found

Find the cheapest month to fly from Boston (BOS) to San Antonio (SAT)

January is typically the cheapest month to fly

From $142 - $271 per traveler.

Alternative airports near San Antonio

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Antonio Intl. SAT. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $449
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $449
Flights from Boston (BOS) to San Antonio (SAT)
Origin airport
Logan Intl.
Destination airport
San Antonio Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$140
Distance
1761 mi
Average flight time
4 hours 57 mins

Boston to San Antonio Flights

The cheapest times to fly from Boston to San Antonio

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to San Antonio are during the month of January. You can find some of the cheapest flights from Boston to San Antonio with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to San Antonio

Sunday is one of the best days to book for cheap flights from Boston to San Antonio: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to San Antonio

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to San Antonio in 2026. You can also book with separate airlines for your outbound and return journeys, from $80 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to San Antonio flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to San Antonio airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT) cost?
Get a cheap one-way flight from $80 or cheap return flight from $140 from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
The cheapest month to fly from BOS to SAT is January, when demand is low. Off-peak season is usually when better flight deals are available between these airports.
Which airlines fly direct from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
Take a nonstop flight with Delta Air Lines and go straight from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT).
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from BOS to SAT. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
On average, Logan Intl. Airport (BOS) offers 6 direct flights to San Antonio Intl. Airport (SAT) per week. If you want more options, use Expedia's filter tool to look for flights with one or two stops. Squeeze in a visit to another location or simply break up your travels.
What are the most popular departure times for flights from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
More passengers fly between BOS and SAT at 12 PM than at any other time. Looking to skip the crowds? Try choosing a quieter departure window and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from BOS to SAT?
Friday offers the most flights from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT). Consider taking off on this day and you'll have a greater chance of finding a schedule that works for you.
What is the earliest flight from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
Logan Intl. Airport (BOS)'s first flight to San Antonio Intl. Airport (SAT) departs at approximately 12:01PM UTC-5. With a flight time of 4h 54m, you'll land at around 3:55PM UTC-6.
How long does it take to fly from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
The average flight time from BOS to SAT is 4 hours and 54 minutes, covering a distance of 1,750 mi.
What airline has the least delays from BOS to SAT?
With 84% of journeys generally landing on schedule, JetBlue Airways has the best on-time performance for direct flights from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT). To check your flight status and get notified about any changes, head to the Expedia App.
What is the best time to fly from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
Opt for a flight from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Antonio from Logan Intl. Airport (BOS)?
If you're flying on a direct flight from Logan Intl. Airport (BOS) to San Antonio, San Antonio Intl. Airport (SAT) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT) last-minute?
Booking your flight from BOS to SAT just before your getaway is usually more expensive. But if you're flexible with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a BOS to SAT flight and hotel package?
You can save money by securing a BOS to SAT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your ideal accommodations and flights, consider adding extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to San Antonio Intl. Airport (SAT)?
In most instances, you can cancel or modify your BOS to SAT flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need further information, head to our Customer Service portal.

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*Available to One Key members.