*All amounts are in USD. Taxes and surcharges are included. No booking fee is applicable. Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional baggage fees may apply.
Boston (BOS) to Bilbao (BIO) flights from USD654
expand_more
1 Passenger, Economy Class
expand_moretoday
today
*Modifying this information may result in a different fare
Why book directly on the KLM website?
Explore the benefits of booking through our website.
No hidden costs
Book with confidence. Our rates hide no unpleasant surprises.
24/7 customer service
Count on direct, personal support whenever you need it, day or night.
Seamless travel
Enjoy a smooth journey with timely updates and automatic rebooking.
Lowest fares between Boston and Bilbao
location_on
location_on