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Cheap flights from Boston to Bilbao from $249

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Bilbao departing on 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Boston to Bilbao

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
11:40 pm - 10:55 pm
BOS
-
BIO
18h 15m1 stop
Iberia Logo
11:25 am - 9:55 pm
BIO
-
BOS
15h 30m1 stop
$418Iberia
Tue, Mar 10 - Mon, Mar 16
Multiple Airlines Logo
4:45 pm - 8:30 am
BOS
-
BIO
9h 45m1 stop
Multiple Airlines Logo
6:45 am - 3:15 pm
BIO
-
BOS
14h 30m1 stop
$421Multiple Airlines
Fri, Jan 23 - Fri, Jan 30
Lufthansa Logo
2:20 pm - 10:50 am
BOS
-
BIO
14h 30m2 stops
Lufthansa Logo
11:35 am - 6:35 pm
BIO
-
BOS
13h 00m1 stop
$425Lufthansa
Thu, Jan 22 - Thu, Jan 29
American Airlines Logo
3:35 pm - 12:50 pm
BOS
-
BIO
15h 15m2 stops
American Airlines Logo
1:35 pm - 10:56 pm
BIO
-
BOS
15h 21m2 stops
$435American Airlines
Thu, Jan 22 - Thu, Jan 29
KLM Logo
9:30 pm - 5:20 pm
BOS
-
BIO
14h 50m1 stop
KLM Logo
7:25 am - 2:30 pm
BIO
-
BOS
12h 05m1 stop
$436KLM
Thu, Mar 12 - Tue, Mar 17
Iberia Logo
4:45 pm - 8:30 am
BOS
-
BIO
9h 45m1 stop
Iberia Logo
10:05 pm - 8:55 pm
BIO
-
BOS
28h 50m1 stop
$437Iberia
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
5:10 pm - 12:50 pm
BOS
-
BIO
13h 40m2 stops
Multiple Airlines Logo
9:35 pm - 3:15 pm
BIO
-
BOS
23h 40m1 stop
$444Multiple Airlines
Sun, Feb 15 - Wed, Mar 4
TAP AIR PORTUGAL Logo
7:05 pm - 5:55 pm
BOS
-
BIO
17h 50m1 stop
TAP AIR PORTUGAL Logo
6:40 pm - 3:35 pm
BIO
-
BOS
25h 55m1 stop
$448TAP AIR PORTUGAL
Thu, Mar 12 - Tue, Mar 17
United Airlines Logo
8:40 pm - 9:55 pm
BOS
-
BIO
19h 15m1 stop
United Airlines Logo
11:35 am - 5:19 pm
BIO
-
BOS
35h 44m2 stops
$451United Airlines
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
3:35 pm - 12:50 pm
BOS
-
BIO
16h 15m2 stops
Multiple Airlines Logo
6:50 pm - 7:35 pm
BIO
-
BOS
29h 45m1 stop
$453Multiple Airlines
Tue, Mar 10 - Mon, Mar 16

Iberia flights from Boston to Bilbao

Our best Iberia deals on Boston to Bilbao flight tickets
Iberia
Mar 10
BOS11:40 pmBoston Logan Intl
18h 15m
1 stop
BIO10:55 pmBilbao
Mar 16
BIO11:25 amBilbao
15h 30m
1 stop
BOS9:55 pmBoston Logan Intl
$418
Find similar
Iberia
Feb 18
BOS4:45 pmBoston Logan Intl
9h 45m
1 stop
BIO8:30 amBilbao
Feb 22
BIO10:05 pmBilbao
28h 50m
1 stop
BOS8:55 pmBoston Logan Intl
$437
Find similar
Iberia
Mar 10
BOS11:40 pmBoston Logan Intl
12h 25m
1 stop
BIO5:05 pmBilbao
Mar 15
BIO9:35 pmBilbao
23h 40m
1 stop
BOS4:15 pmBoston Logan Intl
$477
Find similar

KLM flights from Boston to Bilbao

Our best KLM deals on Boston to Bilbao flight tickets
KLM
Mar 12
BOS9:30 pmBoston Logan Intl
14h 50m
1 stop
BIO5:20 pmBilbao
Mar 17
BIO7:25 amBilbao
12h 05m
1 stop
BOS2:30 pmBoston Logan Intl
$436
Find similar
KLM
Dec 24
BOS8:50 pmBoston Logan Intl
13h 40m
1 stop
BIO4:30 pmBilbao
Dec 31
BIO7:25 amBilbao
14h 55m
1 stop
BOS4:20 pmBoston Logan Intl
$1,503
Find similar
KLM
Dec 24
BOS7:10 pmBoston Logan Intl
10h 10m
1 stop
BIO11:20 amBilbao
Dec 30
BIO5:20 pmBilbao
26h 00m
1 stop
BOS1:20 pmBoston Logan Intl
$1,506
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Bilbao 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, momondo users made 832,500 searches. Data last updated December 10, 2025.
Use the filters below to find and compare flights from Boston to Bilbao that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

11:40 pm-10:55 pm

1 stop18h 15m

Bilbao

Mon 3/16

11:25 am-9:55 pm

1 stop15h 30m

$418

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Fri 1/23

4:45 pm-8:30 am

1 stop9h 45m

Bilbao

Fri 1/30

6:45 am-3:15 pm

1 stop14h 30m

$421

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 1/22

2:20 pm-10:50 am

2 stops14h 30m

Bilbao

Thu 1/29

11:35 am-6:35 pm

1 stop13h 00m

$425

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 1/22

3:35 pm-12:50 pm

2 stops15h 15m

Bilbao

Thu 1/29

1:35 pm-10:56 pm

2 stops15h 21m

$435

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 3/12

9:30 pm-5:20 pm

1 stop14h 50m

Bilbao

Tue 3/17

7:25 am-2:30 pm

1 stop12h 05m

$436

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 2/18

4:45 pm-8:30 am

1 stop9h 45m

Bilbao

Sun 2/22

10:05 pm-8:55 pm

1 stop28h 50m

$437

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Sun 2/15

5:10 pm-12:50 pm

2 stops13h 40m

Bilbao

Wed 3/4

9:35 pm-3:15 pm

1 stop23h 40m

$444

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Thu 3/12

7:05 pm-5:55 pm

1 stop17h 50m

Bilbao

Tue 3/17

6:40 pm-3:35 pm

1 stop25h 55m

$448

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Wed 2/18

8:40 pm-9:55 pm

1 stop19h 15m

Bilbao

Sun 2/22

11:35 am-5:19 pm

2 stops35h 44m

$451

BostonBilbao

BOS - BIO

BOSBIO

Boston Logan Intl

Tue 3/10

3:35 pm-12:50 pm

2 stops16h 15m

Bilbao

Mon 3/16

6:50 pm-7:35 pm

1 stop29h 45m

$453

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Bilbao from

How to get the cheapest flight ticket from Boston to Bilbao

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Bilbao?

The cheapest month to fly to Bilbao from Boston is in January. Flight prices, which tend to average around $564, are often lower during this time because this is during the off-season. If you’re not able to fly to Bilbao in January, then October is your next best option. Flight prices from Boston to Bilbao during October average around $571.

What is the cheapest day to depart on your flight to Bilbao?

The cheapest day to depart from Boston to Bilbao is on a Sunday. Travelers who choose to depart for Bilbao on a Sunday will often find tickets for as low as $708. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $877. These prices are subject to change though, so be sure to set up a Price Alert for flights to Bilbao.

What is the cheapest time of day to depart on your flight to Bilbao?

Our most recent data shows that the best time of day to fly to Bilbao is in the morning. Flights from Boston to Bilbao during this time can be as low as $663. In the afternoon is when there is more demand to fly to Bilbao, so prices are often more expensive at around $820 per ticket.

How far in advance should I book a flight to Bilbao?

You are more likely to see cheaper flights to Bilbao from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Bilbao for around $684 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Bilbao from Boston for as low as $524 on momondo.

When to book flights from Boston to Bilbao

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Bilbao according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Bilbao (BOS to BIO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Bilbao

Fastest flight time

14h 35m

Direct flights

None
The fastest flight from Boston to Bilbao takes 14h 35m
There are no direct flights from Boston to Bilbao. There are no popular flight routes from Boston to Bilbao.
Search flight deals

  • How far is Boston Logan Intl to Bilbao by plane?

    The straight-line distance from Boston Logan Intl to Bilbao is 3350.6 mi. In terms of flight time, this usually takes a little over 14h 35m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Bilbao Airport?

    Prices for flights from Boston Logan Intl Airport to Bilbao Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Bilbao Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Bilbao Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Bilbao Airport.

  • What documentation or ID do you need to fly to Bilbao Airport?

    The travel and health documents required for your trip to Bilbao Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Bilbao Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Boston to Bilbao?

Best airlines flying from Boston to Bilbao

Compare and see reviews for airlines that fly from Boston to Bilbao with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $395Free CancellationRating
7.0
3,045 reviews
Search Iberia flights
DeltaPriceFrom $424Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $439Free CancellationRating
7.2
11,048 reviews
Search American Airlines flights
LufthansaPriceFrom $453Free CancellationRating
6.8
7,619 reviews
Search Lufthansa flights
TAP AIR PORTUGALPriceFrom $468Free CancellationRating
7.1
2,086 reviews
Search TAP AIR PORTUGAL flights
United AirlinesPriceFrom $499Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
KLMPriceFrom $516Free CancellationRating
7.7
1,431 reviews
Search KLM flights
LEVELPriceFrom $523Free CancellationRating
0.0
Search LEVEL flights

Traveling to a place near Bilbao?

Book flights to Bilbao if you plan to visit one of these locations
Getxo
Laredo
Lekeitio

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Bilbao?

Finding the right flight to Bilbao from Boston is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Bilbao quick and easy, saving you time and money.

Can I find flights from Boston to Bilbao with flexible booking policies on momondo?

Yes. All flights to Bilbao from Boston on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Boston to Bilbao?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Bilbao from Boston.

I’m not ready to book a flight from Boston to Bilbao right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Boston to Bilbao now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Bilbao and let you know when they change.

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