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Flights from Boston to San Antonio

Book direct flights from Boston to San Antonio: One way flights from $199, round trip flights from $240. Find flight deals for the next 3 months below.

      • Cheapest nonstop
        BOS 9:01 AM
        4h 24m
        Nonstop
        SAT 12:25 PM
        Boston - San Antonio | Sat, Aug 22 | Delta Air Lines
        SAT 1:20 PM
        4h 27m
        Nonstop
        BOS 6:47 PM
        San Antonio - Boston | Wed, Aug 26 | Delta Air Lines
        $240 $295
        19% off
        19% off
        $295 $240
      • BOS 9:00 AM
        4h 24m
        Nonstop
        SAT 12:24 PM
        Boston - San Antonio | Thu, Jul 30 | Delta Air Lines
        SAT 1:20 PM
        4h 27m
        Nonstop
        BOS 6:47 PM
        San Antonio - Boston | Tue, Aug 4 | Delta Air Lines
        $240 $295
        19% off
        19% off
        $295 $240
      • BOS 9:01 AM
        4h 24m
        Nonstop
        SAT 12:25 PM
        Boston - San Antonio | Fri, Aug 21 | Delta Air Lines
        SAT 1:20 PM
        4h 27m
        Nonstop
        BOS 6:47 PM
        San Antonio - Boston | Tue, Aug 25 | Delta Air Lines
        $240 $295
        19% off
        19% off
        $295 $240
      • BOS 9:00 AM
        4h 24m
        Nonstop
        SAT 12:24 PM
        Boston - San Antonio | Fri, Jul 31 | Delta Air Lines
        SAT 6:16 PM
        6h 4m
        1 stop
        BOS 1:20 AM
        San Antonio - Boston | Sun, Aug 2 | Delta Air Lines
        $245
        17% off
        $295 $245
      • BOS 5:51 AM
        6h 58m
        1 stop
        SAT 11:49 AM
        Boston - San Antonio | Thu, Aug 20 | Delta Air Lines
        SAT 1:20 PM
        4h 27m
        Nonstop
        BOS 6:47 PM
        San Antonio - Boston | Tue, Aug 25 | Delta Air Lines
        $247
        16% off
        $295 $247
      • BOS 9:01 AM
        4h 24m
        Nonstop
        SAT 12:25 PM
        Boston - San Antonio | Thu, Aug 13 | Delta Air Lines
        SAT 12:37 PM
        9h 6m
        1 stop
        BOS 10:43 PM
        San Antonio - Boston | Sun, Aug 16 | Delta Air Lines
        $249
        16% off
        $295 $249
      • BOS 5:45 AM
        6h 14m
        1 stop
        SAT 10:59 AM
        Boston - San Antonio | Thu, Aug 13 | United Airlines
        SAT 6:00 AM
        7h 22m
        1 stop
        BOS 2:22 PM
        San Antonio - Boston | Sun, Aug 16 | United Airlines
        $258
        13% off
        $295 $258
      • BOS 5:38 PM
        6h 1m
        1 stop
        SAT 10:39 PM
        Boston - San Antonio | Fri, Aug 21 | United Airlines
        SAT 1:00 PM
        7h 59m
        1 stop
        BOS 9:59 PM
        San Antonio - Boston | Tue, Aug 25 | United Airlines
        $259
        12% off
        $295 $259
      • BOS 1:00 PM
        17h 25m
        1 stop
        SAT 2:00 PM
        Boston - San Antonio | Wed, Jul 22 | Normal Airline
        SAT 3:00 PM
        6h
        Nonstop
        BOS 4:00 PM
        San Antonio - Boston | Fri, Jul 24 | Normal Airline
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      • Cheapest nonstop
        BOS 9:01 AM
        4h 24m
        Nonstop
        SAT 12:25 PM
        Boston - San Antonio | Tue, Sep 1 | Delta Air Lines
        $199 $228
        13% off
        13% off
        $228 $199
      • BOS 9:01 AM
        4h 24m
        Nonstop
        SAT 12:25 PM
        Boston - San Antonio | Mon, Aug 17 | Delta Air Lines
        $200 $228
        12% off
        12% off
        $228 $200
      • BOS 1:00 PM
        17h 25m
        1 stop
        SAT 2:00 PM
        Boston - San Antonio | Wed, Jul 22 | Normal Airline
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Find cheap airlines flights from Boston to San Antonio

You can choose from 2 airlines that fly from Boston to San Antonio, including Delta Air Lines, United Airlines, Delta Air Lines has lowest fares on this route.
Delta Air Lines logo Delta Air Lines
United Airlines logo United Airlines
Airlines are determined based on actual purchased flight tickets from Boston to San Antonio according to previous 12 months data from Trip.com.

Flight Info | Boston to San Antonio

The distance between Boston and San Antonio is approximately 2,835.87 km. It takes around 4 hours 38 minutes on average to fly from Boston to San Antonio. Based on Trip.com's data travel demand peaks in July. The off-season for travel is December.

Cheapest one-way flight price$199
Cheapest round-trip ticket price$240
Off-season for travelDecember
Peak season for travelJuly
Flight distance2,835.87 km
Average flight time4 hours 38 minutes
Popular airlineDelta Air Lines
Flight statistics for the Boston–San Antonio route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from Boston to San Antonio (BOS-SAT)?

    Based on Trip.com data, Delta Air Lines offers one-way fares as low as $199 on Cheapest nonstop routes (e.g. BOS to SAT on Tue, Sep 1), while Delta Air Lines offers Cheapest nonstop round-trips from $240 departing on Sat, Aug 22 and returning on Wed, Aug 26.
  • At the moment, you can catch a nonstop flight from Boston to San Antonio with the following airlines, including: Delta Air Lines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 4 hours 38 minutes to fly from Boston (BOS) to San Antonio (SAT).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Antonio is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 7 flight per week flying from Boston to San Antonio. You can check the weekly schedule for popular airlines on this route below: Delta Air Lines: S/M/T/W/T/F/S -- DL816 (09:13)
  • To find best deals on flights from Boston to San Antonio, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Sep 1, with one-way flights priced at just $199.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Antonio travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Boston to San Antonio is December, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Boston to San Antonio on July 23, 2026 with Delta Air Lines, with prices starting at $231.
  • You can land at any one of the following hubs in San Antonio, with Boston Logan International Airport to San Antonio International Airport (BOS-SAT) is by far the most common option on this route: San Antonio International Airport (SAT) Kelly Field Annex/Lackland Air Force Base (SKF).
  • The time difference between San Antonio and Boston is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.