$521+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
EAS — BOS
Jun 5 — Jun 121
Round-trip
1 adult, Economy
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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
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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 May 6, 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 May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Wed 7/88:55 am
EAS
- BOS
1 stop18h 10m
Multiple Airlines
Wed 8/510:55 pm
BOS
- EAS
1 stop27h 25m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$655
This Iberia deal was found by Cheapflights users on 5/3. 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.
Wed 7/88:55 am
EAS
- BOS
1 stop18h 10m
Iberia
Thu 8/611:35 pm
BOS
- EAS
1 stop26h 45m
Iberia
Deal found 5/3![Iberia logo]()
$667
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Wed 7/88:55 am
EAS
- BOS
1 stop18h 10m
Multiple Airlines
Wed 7/2910:55 pm
BOS
- EAS
1 stop27h 25m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$668
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Wed 7/88:55 am
EAS
- BOS
1 stop18h 10m
Multiple Airlines
Wed 7/2210:55 pm
BOS
- EAS
1 stop27h 25m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$676
This Iberia deal was found by Cheapflights users on 5/3. 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.
Tue 7/75:55 pm
EAS
- BOS
1 stop33h 10m
Iberia
Wed 8/510:55 pm
BOS
- EAS
1 stop27h 25m
Iberia
Deal found 5/3![Iberia logo]()
$677
This Iberia deal was found by Cheapflights users on 5/2. 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.
Tue 7/75:55 pm
EAS
- BOS
1 stop33h 10m
Iberia
Thu 8/611:35 pm
BOS
- EAS
1 stop26h 45m
Iberia
Deal found 5/2![Iberia logo]()
$678
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Wed 7/810:10 am
EAS
- BOS
2 stops16h 55m
Multiple Airlines
Sun 7/2611:35 pm
BOS
- EAS
1 stop11h 45m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$684
This Iberia deal was found by Cheapflights users on 5/5. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:10 am
EAS
- BOS
1 stop18h 05m
Iberia
Mon 9/289:20 pm
BOS
- EAS
1 stop9h 40m
Iberia
Deal found 5/5![Iberia logo]()
$686
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Wed 7/88:55 am
EAS
- BOS
1 stop18h 10m
Multiple Airlines
Sun 8/211:35 pm
BOS
- EAS
1 stop11h 45m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$703
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 May 6, 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 May 6, 2026.
This Iberia deal was found by Cheapflights users on 5/5. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:10 am
EAS
- BOS
1 stop18h 05m
Iberia
Mon 9/289:20 pm
BOS
- EAS
1 stop9h 40m
Iberia
Deal found 5/5![Iberia logo]()
$686
This American Airlines deal was found by Cheapflights users on 5/5. 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.
Thu 9/249:20 am
EAS
- BOS
2 stops15h 29m
American Airlines
Mon 9/281:00 pm
BOS
- EAS
2 stops13h 40m
American Airlines
Deal found 5/5![American Airlines logo]()
$744
This British Airways deal was found by Cheapflights users on 5/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/91:40 pm
EAS
- BOS
1 stop12h 10m
British Airways
Mon 8/39:20 pm
BOS
- EAS
1 stop17h 30m
British Airways
Deal found 5/5![British Airways logo]()
$968
This British Airways deal was found by Cheapflights users on 5/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:30 pm
EAS
- BOS
2 stops27h 58m
British Airways
Wed 8/59:20 pm
BOS
- EAS
1 stop9h 40m
British Airways
Deal found 5/5![British Airways logo]()
$974
This British Airways deal was found by Cheapflights users on 5/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:30 pm
EAS
- BOS
1 stop28h 20m
British Airways
Mon 8/39:20 pm
BOS
- EAS
1 stop17h 30m
British Airways
Deal found 5/3![British Airways logo]()
$980
This British Airways deal was found by Cheapflights users on 5/1. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/189:30 pm
EAS
- BOS
1 stop28h 20m
British Airways
Tue 7/285:40 pm
BOS
- EAS
1 stop21h 10m
British Airways
Deal found 5/1![British Airways logo]()
$1,005
This British Airways deal was found by Cheapflights users on 5/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:00 pm
EAS
- BOS
2 stops33h 33m
British Airways
Mon 8/37:35 pm
BOS
- EAS
2 stops17h 05m
British Airways
Deal found 5/3![British Airways logo]()
$1,016
This British Airways deal was found by Cheapflights users on 5/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/129:30 pm
EAS
- BOS
1 stop28h 20m
British Airways
Wed 8/59:20 pm
BOS
- EAS
1 stop17h 30m
British Airways
Deal found 5/5![British Airways logo]()
$1,055
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 May 6, 2026.
Search for one-way flight options from San Sebastian to Boston. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
This Iberia deal was found by Cheapflights users on 5/4. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:30 pm
EAS
- BOS
1 stop28h 20m
Iberia
Deal found 5/4![Iberia logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:30 pm
EAS
- BOS
3 stops29h 25m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$530
This British Airways deal was found by Cheapflights users on 5/1. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:30 pm
EAS
- BOS
2 stops27h 19m
British Airways
Deal found 5/1![British Airways logo]()
$538
This British Airways deal was found by Cheapflights users on 5/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 pm
EAS
- BOS
1 stop28h 55m
British Airways
Deal found 5/3![British Airways logo]()
$787
This Iberia deal was found by Cheapflights users on 5/3. 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.
Thu 8/139:05 am
EAS
- BOS
1 stop18h 40m
Iberia
Deal found 5/3![Iberia logo]()
$828
This Ovago deal was found by Cheapflights users on 5/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:30 pm
EAS
- BOS
1 stop28h 20m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$919
This Ovago deal was found by Cheapflights users on 5/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:30 pm
EAS
- BOS
1 stop28h 20m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$944
This British Airways deal was found by Cheapflights users on 5/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:45 am
EAS
- BOS
2 stops35h 10m
British Airways
Deal found 5/3![British Airways logo]()
$1,010
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 May 6, 2026.
Round-trip from | $655 (Kiwi.com) |
|---|---|
One-way from | $521 (Iberia) |
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 May 6, 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
Quickest round-trip
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Thu 9/24
9:10 am-9:15 pm
1 stop18h 05m
Boston Logan Intl
Mon 9/28
9:20 pm-1:00 pm
1 stop9h 40m
$686
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Thu 9/24
9:20 am-6:49 pm
2 stops15h 29m
Boston Logan Intl
Mon 9/28
1:00 pm-8:40 am
2 stops13h 40m
$744
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Thu 7/9
1:40 pm-7:50 pm
1 stop12h 10m
Boston Logan Intl
Mon 8/3
9:20 pm-8:50 pm
1 stop17h 30m
$968
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Tue 7/7
9:30 pm-7:28 pm
2 stops27h 58m
Boston Logan Intl
Wed 8/5
9:20 pm-1:00 pm
1 stop9h 40m
$974
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Tue 7/7
9:30 pm-7:50 pm
1 stop28h 20m
Boston Logan Intl
Mon 8/3
9:20 pm-8:50 pm
1 stop17h 30m
$980
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Sat 7/18
9:30 pm-7:50 pm
1 stop28h 20m
Boston Logan Intl
Tue 7/28
5:40 pm-8:50 pm
1 stop21h 10m
$1,005
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Mon 7/13
6:00 pm-9:33 pm
2 stops33h 33m
Boston Logan Intl
Mon 8/3
7:35 pm-6:40 pm
2 stops17h 05m
$1,016
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Sun 7/12
9:30 pm-7:50 pm
1 stop28h 20m
Boston Logan Intl
Wed 8/5
9:20 pm-8:50 pm
1 stop17h 30m
$1,055
Cheapest one-way
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Sun 9/20
9:30 pm-6:49 pm
2 stops27h 19m
$538
San SebastianBoston
EAS - BOS
EASBOS
San Sebastián
Mon 8/17
6:00 pm-4:55 pm
1 stop28h 55m
$787
Showing 1-10 of 14 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.
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