BOS - EAS

$718 Find Cheap Flights from Boston to San Sebastian - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$575
Typical prices: $695-$1,208
LEVEL
Mon 9/24Sun 10/7
BOS - EAS • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Boston and San Sebastian. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
May
Cheapest • 30% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Barcelona-El Prat (BCN)
Cheapest • Avg $782 (round-trip)
Madrid Barajas (MAD)
Shortest trip • 13h 19m (one-way)
Insights
Insights
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Booking Insights
Flight Deals

Cheap Flights from Boston to San Sebastian (BOS-EAS)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to San Sebastian

Thu, Sep 24 - Thu, Oct 8
Multiple Airlines Logo
10:55 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
27h 25m1 stop Barcelona-El Prat
Multiple Airlines Logo
9:10 am - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
17h 55m1 stop Barcelona-El Prat
$718Multiple Airlines
Thu, Sep 24 - Thu, Oct 8
Multiple Airlines Logo
10:55 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
27h 25m1 stop Barcelona-El Prat
Multiple Airlines Logo
9:10 am - 9:05 pmEAS  San Sebastián-BOS Boston Logan Intl
17h 55m1 stop Barcelona-El Prat
$733Multiple Airlines
Thu, Sep 24 - Thu, Oct 8
Multiple Airlines Logo
10:40 am - 5:20 pmBOS  Boston Logan Intl-EAS San Sebastián
24h 40m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat
Multiple Airlines Logo
9:10 am - 9:55 amEAS  San Sebastián-BOS Boston Logan Intl
30h 45m2 stops Barcelona-El Prat Toronto Pearson Intl
$774Multiple Airlines
Mon, Oct 19 - Thu, Oct 29
Multiple Airlines Logo
8:50 pm - 5:20 pmBOS  Boston Logan Intl-EAS San Sebastián
14h 30m2 stops Reykjavik Keflavik Intl Barcelona-El Prat
Multiple Airlines Logo
2:10 pm - 3:40 pmEAS  San Sebastián-BOS Boston Logan Intl
30h 30m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$809Multiple Airlines
Thu, Sep 24 - Thu, Oct 8
Multiple Airlines Logo
10:40 am - 5:20 pmBOS  Boston Logan Intl-EAS San Sebastián
24h 40m2 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat
Multiple Airlines Logo
9:10 am - 9:55 amEAS  San Sebastián-BOS Boston Logan Intl
30h 45m2 stops Barcelona-El Prat Toronto Pearson Intl
$842Multiple Airlines
Mon, Oct 19 - Thu, Oct 29
Multiple Airlines Logo
8:50 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
29h 30m3 stops Reykjavik Keflavik Intl Munich Franz Josef Strauss Barcelona-El Prat
Multiple Airlines Logo
2:10 pm - 3:40 pmEAS  San Sebastián-BOS Boston Logan Intl
30h 30m2 stops Barcelona-El Prat Lisbon Humberto Delgado
$856Multiple Airlines
Thu, Oct 8 - Thu, Oct 15
Iberia Logo
9:20 pm - 8:50 pmBOS  Boston Logan Intl-EAS San Sebastián
17h 30m1 stop Madrid Barajas
Iberia Logo
1:40 pm - 7:50 pmEAS  San Sebastián-BOS Boston Logan Intl
12h 10m1 stop Madrid Barajas
$874Iberia
Mon, Feb 15 - Fri, Feb 19
Iberia Logo
8:00 pm - 1:00 pmBOS  Boston Logan Intl-EAS San Sebastián
11h 00m1 stop Madrid Barajas
Iberia Logo
1:40 pm - 6:25 pmEAS  San Sebastián-BOS Boston Logan Intl
10h 45m1 stop Madrid Barajas
$876Iberia
Thu, Oct 15 - Mon, Oct 19
Iberia Logo
9:20 pm - 8:50 pmBOS  Boston Logan Intl-EAS San Sebastián
17h 30m1 stop Madrid Barajas
Iberia Logo
1:40 pm - 7:45 pmEAS  San Sebastián-BOS Boston Logan Intl
12h 05m1 stop Madrid Barajas
$891Iberia
Mon, Oct 19 - Thu, Oct 29
Multiple Airlines Logo
8:50 pm - 8:20 amBOS  Boston Logan Intl-EAS San Sebastián
29h 30m2 stops Reykjavik Keflavik Intl Barcelona-El Prat
Multiple Airlines Logo
9:20 am - 7:00 pmEAS  San Sebastián-BOS Boston Logan Intl
14h 40m1 stop Madrid Barajas
$900Multiple Airlines
Booking Insights

Price, demand and travel trends for Boston to San Sebastian flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Boston to San Sebastian with more confidence.

What's the cheapest day of the week to fly from Boston to San Sebastian?

Wednesday is the cheapest day of the week to fly from Boston to San Sebastian, it is 17% cheaper than the average day. Thursday is the most expensive day with flight prices 88% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Boston to San Sebastian?

  • May is the cheapest month to fly from Boston to San Sebastian at $616 round-trip.
  • July ($1,628) and December ($1,211) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 164% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Boston to San Sebastian flights

Low season

January

Cheapest flight

$575
Most popular time to fly with an average 3% increase in price.
Flight from Boston to San Sebastian

When to book flights from Boston to San Sebastian

Are your dates flexible? Find out the best times to travel from Boston to San Sebastian based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to San Sebastian flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Boston to San Sebastian?

    Flights from Boston to San Sebastian usually depart from Boston Logan Intl (BOS) and arrive at San Sebastián (EAS).

  • What cabin classes can I book on flights from Boston to San Sebastian?

    Two cabin classes are available on flights from Boston to San Sebastian:

    • Economy Class
    • Business Class

  • Which airports do connecting flights from Boston to San Sebastian pass through?

    Connecting flights from Boston to San Sebastian most commonly pass through:

    • Madrid Barajas (MAD) - 94% of one-stop connections
    • Barcelona-El Prat (BCN) - 6% of one-stop connections
    Together, these airports account for 100% of one-stop bookings on this route.

  • Can I save money by using flexible dates for flights from Boston to San Sebastian?

    Yes. Being flexible with your travel dates can save you up to 56% on the Boston to San Sebastian route. Wednesday is the cheapest departure day at $727 round-trip on average, while Thursday is the most expensive at $1,645, a difference of $918. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in San Sebastian?

    Some of the most popular sights in San Sebastian are San Sebastian City Centre, Playa de Zurriola and Kursaal Palace San Sebastián. These are among the most viewed places in San Sebastian on KAYAK.

  • How long is a flight from Boston to San Sebastian?

    A nonstop flight from Boston to San Sebastian takes 0h 00m, covering 3,398 miles.

  • Do I need a passport to fly from Boston to San Sebastian?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much time can I save by choosing a different layover airport from Boston to San Sebastian?

    Flying via Madrid Barajas (MAD) gives the shortest average 1-stop total travel time at 13h 19m, compared with 22h 58m via Barcelona-El Prat (BCN).

  • What is the time difference between Boston and San Sebastian?

    San Sebastian is 6 hours ahead of Boston (Central European Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at San Sebastián Airport (EAS)?

    San Sebastián Airport (EAS) hosts 5 major car rental companies, with daily rates starting from around $13 for economy cars. Top options include:
    · Enterprise Rent-A-Car
    · Alamo
    · Hertz
    · keddy by Europcar
    · Europcar

  • How much should I expect to pay for a Boston to San Sebastian flight?

    Round-trip flights from Boston to San Sebastian range from $695 to $1,208, with an average of $874 over the past 12 months. Anything below $695 counts as a good deal.

Your guide to booking Boston to San Sebastian flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Wednesday departure instead of Thursday. On this route, Wednesday flights average $727 - about $918 less than Thursday (56% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boston to San Sebastian trip for May. Fares historically average $616 round-trip in that month - typically $1,012 less than the most expensive month, which is July (based on the last 12 months).

Everything you need to know for your flight from Boston to San Sebastian

Information on your arrival and departure airports

Boston (BOS)
San Sebastian (EAS)