$487+ Cheap flights from San Sebastian (EAS) to Boston (BOS)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
EAS — BOS
Sep 8 — Sep 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Sebastian to Boston with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Sebastian to Boston
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Sebastian to BostonExplore the most affordable flight options available from San Sebastian to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 9, 2026.
Explore the most affordable flight options available from San Sebastian to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 9, 2026.
This LEVEL deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop18h 50m
Sun 9/1311:35 pm -
1 stop26h 45m
Deal found 8/7![LEVEL logo]()
$668
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:30 pm -
1 stop24h 40m
Mon 9/2811:35 am -
2 stops15h 05m
Deal found 8/6![Iberia logo]()
$758
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:55 am -
2 stops35h 50m
Mon 9/288:50 pm -
3 stops29h 30m
Deal found 8/6![Multiple Airlines logo]()
$817
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:05 am -
1 stop18h 40m
Mon 8/249:20 pm -
1 stop17h 30m
Deal found 8/4![Iberia logo]()
$929
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:55 am -
1 stop18h 50m
Thu 8/2711:35 pm -
1 stop26h 45m
Deal found 8/7![Multiple Airlines logo]()
$932
This American Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:20 am -
1 stop16h 10m
Sun 10/184:59 pm -
2 stops14h 01m
Deal found 8/5![American Airlines logo]()
$938
This Expedia deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop18h 50m
Sun 9/1311:35 am -
2 stops15h 05m
Deal found 8/7![Iberia logo]()
$941
This Iberia deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:40 pm -
1 stop10h 20m
Tue 11/107:35 pm -
1 stop11h 25m
Deal found 8/7![Iberia logo]()
$958
Best flights from San Sebastian to BostonDiscover carefully curated flight deals from San Sebastian to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
Discover carefully curated flight deals from San Sebastian to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
This LEVEL deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop18h 50m
Sun 9/1311:35 pm -
1 stop26h 45m
Deal found 8/7![LEVEL logo]()
$668
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:30 pm -
1 stop24h 40m
Mon 9/2811:35 am -
2 stops15h 05m
Deal found 8/6![Iberia logo]()
$758
This American Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:20 am -
1 stop16h 10m
Sun 10/185:40 pm -
1 stop13h 20m
Deal found 8/5![American Airlines logo]()
$938
This Finnair deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:20 am -
1 stop16h 10m
Sun 10/189:05 pm -
1 stop9h 55m
Deal found 8/4![Finnair logo]()
$994
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:05 am -
1 stop18h 40m
Mon 8/249:20 pm -
1 stop17h 30m
Deal found 8/4![Iberia logo]()
$929
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:40 pm -
1 stop12h 20m
Tue 11/107:15 pm -
2 stops31h 25m
Deal found 8/7![American Airlines logo]()
$1,016
This Iberia deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:40 pm -
1 stop10h 20m
Tue 11/107:35 pm -
1 stop11h 25m
Deal found 8/7![Iberia logo]()
$958
Last-minute flights from San Sebastian to BostonDiscover last-minute flight deals from San Sebastian to Boston. Data last updated August 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Sebastian to Boston. Data last updated August 9, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:05 am -
1 stop18h 40m
Mon 8/249:20 pm -
1 stop17h 30m
Deal found 8/4![Iberia logo]()
$929
This American Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:20 am -
2 stops16h 46m
Mon 8/2411:53 am -
2 stops14h 47m
Deal found 8/4![American Airlines logo]()
$1,051
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:55 am -
1 stop18h 50m
Thu 8/2711:35 pm -
1 stop26h 45m
Deal found 8/7![Multiple Airlines logo]()
$932
This LEVEL deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LEVEL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop18h 50m
Sun 9/1311:35 pm -
1 stop26h 45m
Deal found 8/7![LEVEL logo]()
$668
This Expedia deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
1 stop18h 50m
Sun 9/1311:35 am -
2 stops15h 05m
Deal found 8/7![Iberia logo]()
$941
This Mytrip deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am -
3 stops35h 50m
Sun 9/134:45 pm -
3 stops33h 35m
Deal found 8/7![Multiple Airlines logo]()
$1,031
This Expedia deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:30 pm -
1 stop24h 40m
Mon 9/2811:35 am -
2 stops15h 05m
Deal found 8/6![Iberia logo]()
$758
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:55 am -
2 stops35h 50m
Mon 9/288:50 pm -
3 stops29h 30m
Deal found 8/6![Multiple Airlines logo]()
$817
One-way flights from San Sebastian to BostonSearch for one-way flight options from San Sebastian to Boston. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
Search for one-way flight options from San Sebastian to Boston. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:30 pm -
2 stops23h 15m
Deal found 8/7![Multiple Airlines logo]()
$487
This Orbitz deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:30 pm -
1 stop28h 00m
Deal found 8/7![Iberia logo]()
$526
This Iberia deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:30 pm -
1 stop28h 15m
Deal found 8/9![Iberia logo]()
$630
This Finnair deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:20 am -
2 stops20h 05m
Deal found 8/9![Finnair logo]()
$742
This Cathay Pacific deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:20 am -
3 stops37h 38m
Deal found 8/9![Multiple Airlines logo]()
$11,111
Find flight deals from San Sebastian to Boston
Discover tips and strategies to find the most affordable flight options for your journey from San Sebastian (EAS) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 9, 2026.
Round-trip from | $668 (LEVEL) |
|---|---|
One-way from | $487 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from San Sebastian to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 9, 2026.
Use the filters below to find and compare flights from San Sebastian to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Sun 9/6
8:55 am-9:45 pm
1 stop18h 50m
Boston Logan Intl
Sun 9/13
11:35 pm-8:20 am
1 stop26h 45m
$668
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Mon 9/21
9:30 pm-4:10 pm
1 stop24h 40m
Boston Logan Intl
Mon 9/28
11:35 am-8:40 am
2 stops15h 05m
$758
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Thu 8/20
9:05 am-9:45 pm
1 stop18h 40m
Boston Logan Intl
Mon 8/24
9:20 pm-8:50 pm
1 stop17h 30m
$929
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Wed 10/14
9:20 am-7:30 pm
1 stop16h 10m
Boston Logan Intl
Sun 10/18
5:40 pm-1:00 pm
1 stop13h 20m
$938
Quickest round-trip
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Fri 11/6
1:40 pm-6:00 pm
1 stop10h 20m
Boston Logan Intl
Tue 11/10
7:35 pm-1:00 pm
1 stop11h 25m
$958
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Wed 10/14
9:20 am-7:30 pm
1 stop16h 10m
Boston Logan Intl
Sun 10/18
9:05 pm-1:00 pm
1 stop9h 55m
$994
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Fri 11/6
1:40 pm-8:00 pm
1 stop12h 20m
Boston Logan Intl
Tue 11/10
7:15 pm-8:40 am
2 stops31h 25m
$1,016
Cheapest one-way
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Tue 10/13
9:30 pm-2:45 pm
2 stops23h 15m
$487
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Tue 10/13
9:30 pm-7:30 pm
1 stop28h 00m
$526
San SebastianBoston
EAS San Sebastián - BOS Boston Logan Intl
EASBOS
San Sebastián
Sun 10/11
9:30 pm-7:45 pm
1 stop28h 15m
$630
Showing 1-10 of 12 resultsSorted by cheapest first
Best time to book a flight from San Sebastian to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from San Sebastian with our price prediction graph.
EAS-BOS
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Related info for your journey
Find useful and relevant information for your journey from San Sebastian to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Randolph
Cambridge
Concord
Brockton
Seekonk
Cranston
Dedham
Warwick
Peabody
Hampton Beach
Auburn
York Beach
Chelsea
Londonderry
Swansea
Fitchburg
North Falmouth
Braintree
Revere
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Boston flight routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights