Cheap flights from Boston (BOS) to San Sebastian (EAS) from $499

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 7/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
BOS — EAS
Jun 4 — Jun 111

Cheap flight deals from Boston to San Sebastian

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Sebastian (EAS). 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 30, 2024.

Popular in

March

Cheapest in

October

Average price

$822

Round-trip from

$571
High demand for flights, 45% potential price rise
Best time to find cheap flights, 31% potential price drop
Average for round-trip flights in May 2024
From Boston Logan Intl to San Sebastián

What is the cheapest day to fly round-trip from Boston to San Sebastian?

Users have found that flying from Boston to San Sebastian on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, October can be a great choice for travel to San Sebastian. Flights to San Sebastian from Boston in October are about $933 on average during October, but can be found for as low as $450.

What is the cheapest time of day to fly from BOS to EAS?

When flying from Boston to San Sebastian, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 20% versus a flight in the afternoon.

Cheap Iberia flights from Boston to San Sebastian

Explore cheap flight options specifically provided by Iberia for the route between Boston and San Sebastian. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Check out some of the cheapest Iberia flights we've come across from Boston to San Sebastian. Come back soon if you're not finding the exact deal you're looking for.
Thu 10/315:55 pmBOS - EAS
1 stop9h 45mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/29$590
Thu 10/315:55 pmBOS - EAS
1 stop14h 05mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/30$591
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/29$633
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/99:20 amEAS - BOS
2 stops14h 30mIberia
Deal found 5/29$682
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/91:40 pmEAS - BOS
2 stops15h 40mIberia
Deal found 5/30$683
Thu 6/64:40 pmBOS - EAS
1 stop14h 20mIberia
Sun 6/99:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$773
Thu 6/64:40 pmBOS - EAS
1 stop10h 00mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$783
Thu 6/610:23 amBOS - EAS
2 stops16h 17mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$850
Tue 6/411:00 pmBOS - EAS
1 stop27h 55mIberia
Tue 6/119:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$903

Cheap Vueling flights from Boston to San Sebastian

Explore cheap flight options specifically provided by Vueling for the route between Boston and San Sebastian. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
To aid your search, here are some of the cheapest Vueling flights we've found from Boston to San Sebastian. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Mon 9/210:55 pmBOS - EAS
1 stop13h 00mVueling
Fri 9/61:35 pmEAS - BOS
1 stop13h 35mVueling
Deal found 5/30$704
Sat 8/1010:55 pmBOS - EAS
1 stop11h 50mVueling
Fri 8/161:35 pmEAS - BOS
1 stop13h 35mVueling
Deal found 5/30$1,068

Cheap Boston to San Sebastian flights in May & June 2024

Find cheap flight options from Boston to San Sebastian specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.
Check out some of the best flight deals from Boston to San Sebastian in 2024. For more flight deals, be sure to check back very soon.
Thu 6/64:40 pmBOS - EAS
1 stop14h 20mIberia
Sun 6/99:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$773
Thu 6/64:40 pmBOS - EAS
1 stop10h 00mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$783
Thu 6/610:23 amBOS - EAS
2 stops16h 17mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$850
Tue 6/411:00 pmBOS - EAS
1 stop27h 55mIberia
Tue 6/119:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$903
Tue 6/411:40 amBOS - EAS
2 stops27h 10mIberia
Tue 6/119:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$905
Tue 6/411:40 amBOS - EAS
2 stops39h 00mIberia
Tue 6/119:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$924
Thu 6/207:19 amBOS - EAS
2 stops23h 41mAmerican Airlines
Mon 6/241:40 pmEAS - BOS
2 stops30h 08mAmerican Airlines
Deal found 5/30$983
Thu 6/610:41 amBOS - EAS
3 stops39h 14mMultiple Airlines
Sun 6/98:40 amEAS - BOS
2 stops35h 30mMultiple Airlines
Deal found 5/29$1,015
Thu 6/2010:23 amBOS - EAS
2 stops16h 17mIberia
Mon 6/249:20 amEAS - BOS
1 stop11h 45mIberia
Deal found 5/30$1,033

Boston to San Sebastian 2024 flight deals

Discover exclusive flight deals for travel between Boston and San Sebastian in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Check out some of the best flight deals from Boston to San Sebastian in 2024. For more flight deals, be sure to check back very soon.
Thu 10/315:55 pmBOS - EAS
1 stop9h 45mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/29$590
Thu 10/315:55 pmBOS - EAS
1 stop14h 05mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/30$591
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/98:30 amEAS - BOS
1 stop19h 10mIberia
Deal found 5/29$633
Thu 10/1010:55 pmBOS - EAS
1 stop11h 45mMultiple Airlines
Sat 10/199:30 pmEAS - BOS
2 stops29h 40mMultiple Airlines
Deal found 5/30$642
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/99:20 amEAS - BOS
2 stops14h 30mIberia
Deal found 5/29$682
Thu 10/315:30 pmBOS - EAS
2 stops14h 30mIberia
Sat 11/91:40 pmEAS - BOS
2 stops15h 40mIberia
Deal found 5/30$683
Thu 10/1010:00 pmBOS - EAS
2 stops28h 40mMultiple Airlines
Sat 10/199:30 pmEAS - BOS
2 stops25h 15mMultiple Airlines
Deal found 5/30$686
Mon 9/210:55 pmBOS - EAS
1 stop13h 00mVueling
Fri 9/61:35 pmEAS - BOS
1 stop13h 35mVueling
Deal found 5/30$704
Thu 10/104:40 pmBOS - EAS
1 stop14h 20mBritish Airways
Sat 10/199:20 amEAS - BOS
1 stop11h 45mBritish Airways
Deal found 5/30$711

Boston to San Sebastian flights leaving soon

Find last-minute flight options from Boston to San Sebastian for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Have a look at some of the flights available from Boston to San Sebastian departing last-minute. Users should be sure to double check the price, date, and time of their last-minute flight.
Thu 6/64:40 pmBOS - EAS
1 stop14h 20mIberia
Sun 6/99:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$773
Thu 6/64:40 pmBOS - EAS
1 stop10h 00mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$783
Thu 6/610:23 amBOS - EAS
2 stops16h 17mIberia
Sun 6/99:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$850
Tue 6/411:00 pmBOS - EAS
1 stop27h 55mIberia
Tue 6/119:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$903
Tue 6/411:40 amBOS - EAS
2 stops27h 10mIberia
Tue 6/119:30 pmEAS - BOS
1 stop23h 35mIberia
Deal found 5/29$905
Tue 6/411:40 amBOS - EAS
2 stops39h 00mIberia
Tue 6/119:30 pmEAS - BOS
2 stops32h 52mIberia
Deal found 5/29$924
Thu 6/610:41 amBOS - EAS
3 stops39h 14mMultiple Airlines
Sun 6/98:40 amEAS - BOS
2 stops35h 30mMultiple Airlines
Deal found 5/29$1,015
Thu 6/610:41 amBOS - EAS
3 stops39h 14mMultiple Airlines
Sun 6/98:40 amEAS - BOS
3 stops40h 41mMultiple Airlines
Deal found 5/29$1,124

One-way flights to San Sebastian from Boston

Search for one-way flight options from Boston to San Sebastian. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Users traveling one-way from Boston to San Sebastian can select one of these great deals. For those needing a return trip from Boston, there is a search form available above.
Sat 7/135:45 pmBOS - EAS
2 stops32h 55mAmerican Airlines
Deal found 5/29$499
Tue 7/94:40 pmBOS - EAS
1 stop10h 00mIberia
Deal found 5/30$530
Tue 7/97:18 amBOS - EAS
2 stops19h 22mIberia
Deal found 5/30$534
Wed 7/36:31 amBOS - EAS
2 stops20h 09mAmerican Airlines
Deal found 5/29$547
Sat 6/296:10 pmBOS - EAS
2 stops56h 30mAmerican Airlines
Deal found 5/29$568
Sat 6/293:42 pmBOS - EAS
3 stops58h 58mMultiple Airlines
Deal found 5/29$576
Sat 7/1311:35 pmBOS - EAS
3 stops27h 05mMultiple Airlines
Deal found 5/29$620
Sat 7/134:40 pmBOS - EAS
1 stop22h 10mIberia
Deal found 5/29$638
Wed 7/35:47 pmBOS - EAS
2 stops32h 53mAmerican Airlines
Deal found 5/30$659

Find flights from Boston to San Sebastian within your budget

Customize your flight search to find flights from Boston to San Sebastian 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 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$590 - $983

Route

Depart

Return

Price

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/31

1 stop9h 45m

San Sebastián

Sat 11/9

1 stop19h 10m

$590

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/31

1 stop14h 05m

San Sebastián

Sat 11/9

1 stop19h 10m

$591

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/31

2 stops14h 30m

San Sebastián

Sat 11/9

1 stop19h 10m

$633

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/10

1 stop11h 45m

San Sebastián

Sat 10/19

2 stops29h 40m

$642

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/10

2 stops28h 40m

San Sebastián

Sat 10/19

2 stops25h 15m

$686

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 9/2

1 stop13h 00m

San Sebastián

Fri 9/6

1 stop13h 35m

$704

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 10/10

1 stop14h 20m

San Sebastián

Sat 10/19

1 stop11h 45m

$711

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Mon 9/2

2 stops34h 30m

San Sebastián

Fri 9/6

1 stop13h 35m

$739

Boston Logan IntlSan Sebastián

BOS - EAS

BOSEAS

Boston Logan Intl

Thu 6/20

2 stops23h 41m

San Sebastián

Mon 6/24

2 stops30h 08m

$983

Flights are sorted by cheapest first

Deals found on 5/29

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

Use this chart to determine the cheapest time to fly round-trip from Boston to San Sebastian. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Boston to San Sebastian flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Boston to San Sebastian

Have a flexible travel schedule? Discover the best time to fly to San Sebastian from Boston with our price prediction graph.
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.

Reviews of airlines servicing San Sebastian

Get insights into the airlines that provide service to San Sebastian. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Sebastian. Reviews last updated May 30, 2024.
Read reviews from past customers who have flown Iberia and Vueling from Boston to San Sebastian. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

7.8
Good
1,053 reviews
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

7.5
Good
3,651 reviews
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

7.3
Good
14,284 reviews
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

7.1
Good
2,742 reviews
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

7.0
Good
1,419 reviews
7.8
Good
1,053 reviews

Entertainment

7.9

Comfort

7.8

Food

7.5

Boarding

8.0

Overall

7.8

Crew

8.2

Reviews

1 / 10

Flight took off a hour late due to electrical problems. The space between the seats felt like the tightest ever. When the person in front reclines their seat, they are in your lap and you cant even get up to go to the bathroom. I had to ask everyone in my aisle to get up and exit and I had to climb over the seats to exit. The stewards almost never came by to pick up trash. We were told the alcohol would be served after the meal but they never came back through and offered it. Most international flights offer a warm cloth in the morning, not this flight. No interactions with staff except during meal service, otherwise they were nowhere to be found. When they were around, they were very nice, but service was definitely lacking.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Sebastian. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from Boston to San Sebastian for under $600 on Cheapflights?

    Yes, there are multiple flights from Boston to San Sebastian for under $600. The cheapest flight booked recently is on Iberia for just $590, but on average you can expect to pay $901.

  • Are there last-minute flights available from Boston to San Sebastian for under $800?

    There are currently 8+ open flights from Boston to San Sebastian within the next 7 days for less than $800.

  • What are the cheapest airlines flying from Boston to San Sebastian round-trip?

    Currently priced at $590, Iberia will fly you from Boston to San Sebastian and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Vueling and British Airways - these airlines can fly you to your destination from $704 and $711, respectively. Iberia is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Boston to San Sebastian one-way?

    $499 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Iberia and British Airways, with prices starting from $530 and $1,386, respectively.

  • What does BOS to EAS mean?

    BOS stands for Boston Logan Intl Airport, while EAS stands for San Sebastián Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Boston to San Sebastian that include extra baggage allowance?

    The amount of baggage you can bring on your Boston to San Sebastian flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Boston to San Sebastian with specific airlines?

    Yes, Cheapflights allows you to browse and filter Boston to San Sebastian flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Boston to San Sebastian that include hotel bookings?

    Yes. In addition to deals on Boston to San Sebastian flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boston to San Sebastian?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Sebastian.

  • Can I find deals for business class flights from Boston to San Sebastian?

    Yes. Cheapflights offers flight deals from Boston to San Sebastian by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Boston to San Sebastian that allow pets onboard?

    Many airlines flying from Boston to San Sebastian offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Boston to San Sebastian?

    Yes, you can often find last-minute deals on Boston to San Sebastian flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Boston to San Sebastian flight deals updated?

    The Boston to San Sebastian flight deals you see on this page were last updated on 5/30.

See more FAQs

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 for Boston to San Sebastian
See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Boston to San Sebastian

Discover the top 2 airlines that operate flights from Boston to San Sebastian. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$607Average$796FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
IberiaCheapest$640Average$987FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Search flights from Boston to San Sebastian by cabin class

Find flights from Boston to San Sebastian, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Boston to San Sebastian?

Deals for Boston to San Sebastian flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Boston to San Sebastian?

Cheapflights helps you find that perfect flight to San Sebastian from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Boston to San Sebastian with no change fees?

Need flexible booking options for your flight to San Sebastian from Boston? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Boston to San Sebastian become cheaper?

Not ready to book yet? You can track prices for flights from Boston to San Sebastian on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.