Boston (BOS) to Helsinki (HEL) flight deal from $397 USD in economy class

AAAmerican Airlines

AYFinnair

Round Trip•Economy

BOS

Logan International Airport

Boston, United States

HEL

Helsinki Airport

Helsinki, Finland

$752 USD

-47%$397 USD

Verified Nov 5, 2025 at 3:21 AM

December 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$537 2$527 3$527 4$607 5$615 6$615 7$527 8$527 9$527 10$599 11$659 12$699 13$699 14$683 15$633 16$739 17$944 18$1,014 19$1,142 20$1,553 21$1,377 22$1,208 23$1,127 24$819 25$869 26$695 27$758 28$637 29$527 30$527 31$527 1 2 3 4

Extremely Rare Availability

1% of dates checked are available within 10% of the lowest price

Sunday, December 14th, 2025

10 round-trip options

Returning

Fri, Dec 19, 2025•5 Day Trip

$978 USD

Google Flights

Returning

Sat, Dec 20, 2025•6 Day Trip

$1,029 USD

Google Flights

Returning

Sun, Dec 21, 2025•7 Day Trip

$821 USD

Google Flights

Returning

Mon, Dec 22, 2025•8 Day Trip

$683 USD

Google Flights

Returning

Tue, Dec 23, 2025•9 Day Trip

$686 USD

Google Flights

Returning

Wed, Dec 24, 2025•10 Day Trip

$691 USD

Google Flights

Returning

Thu, Dec 25, 2025•11 Day Trip

$708 USD

Google Flights

Returning

Fri, Dec 26, 2025•12 Day Trip

$1,004 USD

Google Flights

Returning

Sat, Dec 27, 2025•13 Day Trip

$1,078 USD

Google Flights

Returning

Sun, Dec 28, 2025•14 Day Trip

$1,156 USD

Google Flights