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Flights from Boston to San Sebastian

Find cheap airlines flights from Boston to San Sebastian

You can choose from 1 airlines that fly from Boston to San Sebastian, including Iberia, Level has lowest fares on this route.
Iberia logo Iberia
Airlines are determined based on actual purchased flight tickets from Boston to San Sebastian according to previous 12 months data from Trip.com.

Find flight deals from Boston to San Sebastian for the next 3 months. Book one way flights from $368 or round trip flights from $831.

      • BOS 10:55 PM
        27h 25m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Fri, Jul 3 | Iberia
        EAS 8:55 AM
        18h 10m
        1 stop
        BOS 9:05 PM
        San Sebastian - Boston | Fri, Jul 10 | Iberia
        $831 $1,422
        42% off
        42% off
        $1,422 $831
      • BOS 7:20 PM
        16h
        1 stop
        EAS 5:20 PM
        Boston - San Sebastian | Wed, Jul 1 | Virgin Atlantic
        EAS 8:55 AM
        14h 46m
        1 stop
        BOS 5:41 PM
        San Sebastian - Boston | Wed, Jul 8 | Vueling Airlines
        $1,023 $1,422
        28% off
        28% off
        $1,422 $1,023
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Thu, Jul 30 | Iberia
        EAS 5:55 PM
        33h 10m
        1 stop
        BOS 9:05 PM
        San Sebastian - Boston | Thu, Aug 6 | Iberia
        $1,046 $1,422
        26% off
        26% off
        $1,422 $1,046
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Thu, Aug 6 | Iberia
        EAS 5:55 PM
        33h 10m
        1 stop
        BOS 9:05 PM
        San Sebastian - Boston | Thu, Aug 13 | Iberia
        $1,048
        26% off
        $1,422 $1,048
      • BOS 9:20 PM
        9h 40m
        1 stop
        EAS 1:00 PM
        Boston - San Sebastian | Wed, Aug 5 | Iberia
        EAS 9:30 PM
        24h 40m
        1 stop
        BOS 4:10 PM
        San Sebastian - Boston | Wed, Aug 12 | Iberia
        $1,052
        26% off
        $1,422 $1,052
      • BOS 9:05 PM
        17h 45m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Fri, Aug 7 | Iberia
        EAS 9:20 AM
        16h 10m
        1 stop
        BOS 7:30 PM
        San Sebastian - Boston | Fri, Aug 14 | Iberia
        $1,054
        26% off
        $1,422 $1,054
      • BOS 7:20 PM
        16h
        1 stop
        EAS 5:20 PM
        Boston - San Sebastian | Wed, Jul 1 | Air France
        EAS 8:55 AM
        14h 46m
        1 stop
        BOS 5:41 PM
        San Sebastian - Boston | Wed, Jul 8 | Vueling Airlines
        $1,055
        26% off
        $1,422 $1,055
      • BOS 7:20 PM
        16h
        1 stop
        EAS 5:20 PM
        Boston - San Sebastian | Wed, Jul 1 | KLM
        EAS 8:55 AM
        14h 46m
        1 stop
        BOS 5:41 PM
        San Sebastian - Boston | Wed, Jul 8 | Vueling Airlines
        $1,055
        26% off
        $1,422 $1,055
      • BOS 9:20 PM
        9h 40m
        1 stop
        EAS 1:00 PM
        Boston - San Sebastian | Wed, Aug 12 | Iberia
        EAS 9:30 PM
        28h 20m
        1 stop
        BOS 7:50 PM
        San Sebastian - Boston | Wed, Aug 19 | Iberia
        $1,065
        25% off
        $1,422 $1,065
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Thu, Jul 16 | Iberia
        EAS 9:20 AM
        12h 50m
        1 stop
        BOS 4:10 PM
        San Sebastian - Boston | Thu, Jul 23 | Iberia
        $1,080
        24% off
        $1,422 $1,080
      • BOS 1:00 PM
        17h 25m
        1 stop
        EAS 2:00 PM
        Boston - San Sebastian | Tue, Jun 16 | Normal Airline
        EAS 3:00 PM
        6h
        Nonstop
        BOS 4:00 PM
        San Sebastian - Boston | Thu, Jun 18 | Normal Airline
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      • BOS 11:50 PM
        26h 30m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Tue, Jul 14 | Level
        $368 $775
        53% off
        53% off
        $775 $368
      • BOS 11:35 PM
        26h 45m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Sat, Jul 18 | Level
        $399 $775
        49% off
        49% off
        $775 $399
      • BOS 11:35 PM
        26h 45m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Sat, Jul 18 | Iberia
        $420 $775
        46% off
        46% off
        $775 $420
      • BOS 8:27 PM
        29h 53m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Tue, Jul 14 | Jetblue Airways
        $421
        46% off
        $775 $421
      • BOS 11:50 PM
        26h 30m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Tue, Jul 14 | American Airlines
        $456
        41% off
        $775 $456
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Tue, Jul 14 | Finnair
        $496
        36% off
        $775 $496
      • BOS 7:20 PM
        16h
        1 stop
        EAS 5:20 PM
        Boston - San Sebastian | Wed, Jun 24 | Virgin Atlantic
        $558
        28% off
        $775 $558
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Sat, Jul 18 | American Airlines
        $560
        28% off
        $775 $560
      • BOS 9:20 PM
        17h 30m
        1 stop
        EAS 8:50 PM
        Boston - San Sebastian | Wed, Jun 24 | American Airlines
        $563
        27% off
        $775 $563
      • BOS 11:30 PM
        26h 50m
        1 stop
        EAS 8:20 AM
        Boston - San Sebastian | Tue, Jun 16 | Iberia
        $589
        24% off
        $775 $589
      • BOS 1:00 PM
        17h 25m
        1 stop
        EAS 2:00 PM
        Boston - San Sebastian | Tue, Jun 16 | Normal Airline
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Displayed flight fares from Boston to San Sebastian are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight Info | Boston to San Sebastian

The distance between Boston and San Sebastian is approximately 5,471.62 km. Based on Trip.com's data travel demand peaks in August. The off-season for travel is October.

Cheapest one-way flight price$368
Cheapest round-trip ticket price$831
Off-season for travelOctober
Peak season for travelAugust
Flight distance5,471.62 km
Popular airlineIberia
Flight statistics for the Boston–San Sebastian 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 Sebastian (BOS-EAS)?

    Based on Trip.com data, Level offers one-way fares as low as $368 on Cheapest nonstop routes (e.g. BOS to EAS on Tue, Jul 14), while Iberia offers Cheapest nonstop round-trips from $831 departing on Fri, Jul 3 and returning on Fri, Jul 10.
  • At the moment, several airlines serve connecting flights from Boston to San Sebastian, including: Iberia Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.
  • 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 Sebastian 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.
  • To find best deals on flights from Boston to San Sebastian, 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, Jul 14, with one-way flights priced at just $368.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Level.
    · 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 Sebastian travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Boston to San Sebastian is October, when demand for travel is lower.
  • After crunching the numbers on our June flight calendar, it's currently cheapest to fly from Boston to San Sebastian on June 27, 2026 with Iberia, with prices starting at $1,090.
  • You can land at any one of the following hubs in San Sebastian, with Boston Logan International Airport to San Sebastian Airport (BOS-EAS) is by far the most common option on this route: San Sebastian Airport (EAS).
  • The time difference between San Sebastian and Boston is 6h.
  • 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.

Book with no extra fees

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.