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Flights from Boston to San Sebastian

Search cheap flights from Boston to San Sebastian in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$357, and round-trip tickets start at US$864.

      • BOS 23:35
        11h 45m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Thu, Aug 20 | China Express General Aviation Co., Ltd.
        EAS 09:05
        18h 40m
        1 stop
        BOS 21:45
        San Sebastian - Boston | Thu, Aug 27 | Vueling Airlines
        US$864 US$1,303
        34% off
        34% off
        US$1,303 US$864
      • BOS 23:35
        11h 45m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Thu, Aug 27 | China Express General Aviation Co., Ltd.
        EAS 09:05
        18h
        1 stop
        BOS 21:05
        San Sebastian - Boston | Thu, Sep 3 | Vueling Airlines
        US$896 US$1,303
        31% off
        31% off
        US$1,303 US$896
      • BOS 22:55
        12h 25m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Aug 19 | China Express General Aviation Co., Ltd.
        EAS 08:55
        18h 10m
        1 stop
        BOS 21:05
        San Sebastian - Boston | Wed, Aug 26 | Vueling Airlines
        US$899 US$1,303
        31% off
        31% off
        US$1,303 US$899
      • BOS 22:55
        12h 25m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Sep 9 | China Express General Aviation Co., Ltd.
        EAS 08:55
        18h 10m
        1 stop
        BOS 21:05
        San Sebastian - Boston | Wed, Sep 16 | Vueling Airlines
        US$909
        30% off
        US$1,303 US$909
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Tue, Sep 8 | Virgin Atlantic
        EAS 08:55
        14h 50m
        1 stop
        BOS 17:45
        San Sebastian - Boston | Tue, Sep 15 | Vueling Airlines
        US$910
        30% off
        US$1,303 US$910
      • BOS 22:55
        12h 25m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Aug 26 | China Express General Aviation Co., Ltd.
        EAS 08:55
        18h 10m
        1 stop
        BOS 21:05
        San Sebastian - Boston | Wed, Sep 2 | Vueling Airlines
        US$912
        30% off
        US$1,303 US$912
      • BOS 23:45
        11h 35m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Sun, Aug 30 | China Express General Aviation Co., Ltd.
        EAS 08:55
        18h 50m
        1 stop
        BOS 21:45
        San Sebastian - Boston | Sun, Sep 6 | Vueling Airlines
        US$935
        28% off
        US$1,303 US$935
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Sep 9 | Air France
        EAS 08:55
        14h 50m
        1 stop
        BOS 17:45
        San Sebastian - Boston | Wed, Sep 16 | Vueling Airlines
        US$950
        27% off
        US$1,303 US$950
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Sep 9 | KLM
        EAS 08:55
        14h 50m
        1 stop
        BOS 17:45
        San Sebastian - Boston | Wed, Sep 16 | Vueling Airlines
        US$950
        27% off
        US$1,303 US$950
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Tue, Jul 28 | Air France
        EAS 08:55
        14h 46m
        1 stop
        BOS 17:41
        San Sebastian - Boston | Tue, Aug 4 | Vueling Airlines
        US$951
        27% off
        US$1,303 US$951
      • BOS 13:00
        17h 25m
        1 stop
        EAS 14:00
        Boston - San Sebastian | Wed, Jul 15 | Normal Airline
        EAS 15:00
        6h
        Nonstop
        BOS 16:00
        San Sebastian - Boston | Fri, Jul 17 | Normal Airline
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      • BOS 23:35
        26h 45m
        1 stop
        EAS 08:20
        Boston - San Sebastian | Sun, Jul 26 | China Express General Aviation Co., Ltd.
        US$357 US$728
        51% off
        51% off
        US$728 US$357
      • BOS 23:35
        11h 45m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Thu, Jul 30 | China Express General Aviation Co., Ltd.
        US$439 US$728
        40% off
        40% off
        US$728 US$439
      • BOS 20:27
        29h 53m
        1 stop
        EAS 08:20
        Boston - San Sebastian | Sun, Jul 26 | Jetblue Airways
        US$442 US$728
        39% off
        39% off
        US$728 US$442
      • BOS 19:20
        31h
        1 stop
        EAS 08:20
        Boston - San Sebastian | Sun, Jul 26 | Virgin Atlantic
        US$446
        39% off
        US$728 US$446
      • BOS 23:35
        26h 45m
        1 stop
        EAS 08:20
        Boston - San Sebastian | Sun, Jul 26 | American Airlines
        US$452
        38% off
        US$728 US$452
      • BOS 23:35
        26h 45m
        1 stop
        EAS 08:20
        Boston - San Sebastian | Sun, Jul 26 | Finnair
        US$472
        35% off
        US$728 US$472
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Tue, Jul 28 | Virgin Atlantic
        US$497
        32% off
        US$728 US$497
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Jul 29 | Virgin Atlantic
        US$497
        32% off
        US$728 US$497
      • BOS 22:55
        12h 25m
        1 stop
        EAS 17:20
        Boston - San Sebastian | Wed, Jul 29 | American Airlines
        US$500
        31% off
        US$728 US$500
      • BOS 19:20
        16h
        1 stop
        EAS 17:20
        Boston - San Sebastian | Thu, Jul 16 | Virgin Atlantic
        US$531
        27% off
        US$728 US$531
      • BOS 13:00
        17h 25m
        1 stop
        EAS 14:00
        Boston - San Sebastian | Wed, Jul 15 | 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.

Boston to San Sebastian Flight Details

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

Cheapest one-way flight priceUS$357
Cheapest return ticket priceUS$864
Cheapest monthOctober
Peak season for travelAugust
Flight distance5,471.62 km
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, China Express General Aviation Co., Ltd. offers one-way fares as low as US$357 on Cheapest nonstop routes (e.g. BOS to EAS on Sun, Jul 26), while China Express General Aviation Co., Ltd. offers Cheapest nonstop round-trips from US$864 departing on Thu, Aug 20 and returning on Thu, Aug 27.
  • 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 Sun, Jul 26, with one-way flights priced at just US$357.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is China Express General Aviation Co., Ltd..
    · 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 July flight calendar, it's currently cheapest to fly from Boston to San Sebastian on July 28, 2026 with Air France, with prices starting at US$951.
  • 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 the estimated lowest prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.