$299 Cheap Flights from Boston (BOS) to Bilbao (BIO)

View $299 flight on Wed, Nov 5, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Bilbao Airport (BIO)

Cheap Flights from Boston to Bilbao (BOS-BIO)

Prices were available within the past 7 days and start at $299 for one-way flights and $338 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Wed, Dec 3 - Tue, Dec 16
BOS
Boston
BIO
Bilbao
$338 Roundtrip, found 2 days ago
$338
Roundtrip
found 2 days ago
Select Iberia flight, departing Wed, Dec 3 from Boston to Bilbao, returning Tue, Dec 16, priced at $338 found 2 days ago
Iberia
Wed, Jan 21 - Wed, Jan 28
BOS
Boston
BIO
Bilbao
$341 Roundtrip, found 6 days ago
$341
Roundtrip
found 6 days ago
Select Iberia flight, departing Wed, Jan 21 from Boston to Bilbao, returning Wed, Jan 28, priced at $341 found 6 days ago
Iberia
Mon, Nov 10 - Tue, Nov 18
BOS
Boston
BIO
Bilbao
$343 Roundtrip, found 4 days ago
$343
Roundtrip
found 4 days ago
Select Iberia flight, departing Mon, Nov 10 from Boston to Bilbao, returning Tue, Nov 18, priced at $343 found 4 days ago
American Airlines
Wed, Dec 3 - Tue, Dec 16
BOS
Boston
BIO
Bilbao
$351 Roundtrip, found 2 days ago
$351
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Dec 3 from Boston to Bilbao, returning Tue, Dec 16, priced at $351 found 2 days ago
Swiss International Air Lines
Wed, Oct 22 - Wed, Oct 29
BOS
Boston
BIO
Bilbao
$377 Roundtrip, found 4 days ago
$377
Roundtrip
found 4 days ago
Select Swiss International Air Lines flight, departing Wed, Oct 22 from Boston to Bilbao, returning Wed, Oct 29, priced at $377 found 4 days ago
Lufthansa
Wed, Oct 22 - Wed, Oct 29
BOS
Boston
BIO
Bilbao
$382 Roundtrip, found 4 days ago
$382
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Oct 22 from Boston to Bilbao, returning Wed, Oct 29, priced at $382 found 4 days ago
United
Wed, Dec 3 - Tue, Dec 16
BOS
Boston
BIO
Bilbao
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select United flight, departing Wed, Dec 3 from Boston to Bilbao, returning Tue, Dec 16, priced at $383 found 2 days ago
Air Canada
Mon, Oct 27 - Tue, Nov 11
BOS
Boston
BIO
Bilbao
$395 Roundtrip, found 1 day ago
$395
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Oct 27 from Boston to Bilbao, returning Tue, Nov 11, priced at $395 found 1 day ago
Delta
Sun, Sep 21 - Tue, Oct 7
BOS
Boston
BIO
Bilbao
$405 Roundtrip, found 13 hours ago
$405
Roundtrip
found 13 hours ago
Select Delta flight, departing Sun, Sep 21 from Boston to Bilbao, returning Tue, Oct 7, priced at $405 found 13 hours ago
TAP Portugal
Mon, Dec 8 - Mon, Dec 15
BOS
Boston
BIO
Bilbao
$439 Roundtrip, found 1 hour ago
$439
Roundtrip
found 1 hour ago
Select TAP Portugal flight, departing Mon, Dec 8 from Boston to Bilbao, returning Mon, Dec 15, priced at $439 found 1 hour ago

Find the cheapest month to fly from Boston (BOS) to Bilbao (BIO)

October is typically the cheapest month to fly

From $367 - $972 per traveler.

Alternative airports near Bilbao

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Bilbao Airport BIO. Cheapest and Closest option available. Average driving time to city center is 13 minutes. Flights from $602
BIO
Bilbao Airport
CheapestClosest
Average driving time to city center13 min
Flights from $602
Flights from Boston (BOS) to Bilbao (BIO)
Origin airport
Logan Intl.
Destination airport
Bilbao
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, SATA International-Azores Airlines S.A., Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$338
Distance
3350 mi

Boston to Bilbao Flights

The cheapest times to fly from Boston to Bilbao

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to Bilbao are during the month of December. You can find some of the cheapest flights from Boston to Bilbao with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to Bilbao

Sunday is one of the best days to book for cheap flights from Boston to Bilbao: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to Bilbao

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to Bilbao in 2025. You can also book with separate airlines for your outbound and return journeys, from $299 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to Bilbao flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to Bilbao airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Bilbao Airport (BIO) cost?
Grab a cheap one-way flight from $299 or cheap return flight from $338 from Logan Intl. Airport (BOS) to Bilbao Airport (BIO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Bilbao Airport (BIO)?
The cheapest month to fly from BOS to BIO is December, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Bilbao Airport (BIO)?
To find the cheapest airline that'll fly you from BOS to BIO, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Logan Intl. Airport (BOS) to Bilbao Airport (BIO)?
Direct flights from Logan Intl. Airport (BOS) to Bilbao Airport (BIO) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BOS to BIO?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Bilbao Airport (BIO)?
Select a flight from Logan Intl. Airport (BOS) to Bilbao Airport (BIO) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Bilbao Airport (BIO) last-minute?
Booking your flight from BOS to BIO just before your getaway is usually more expensive. But if you're flexible with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a BOS to BIO flight and hotel package?
Compared with arranging hotels and flights separately, booking a BOS to BIO flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place takes the hassle out of planning your trip. Just pick your flights and choose from our extensive range of stays, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Bilbao Airport (BIO)?
If you booked your BOS to BIO flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.