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

Monday, December 22nd, 2025

10 round-trip options

Returning

Sat, Dec 27, 2025•5 Day Trip

$1,449 USD

Google Flights

Returning

Sun, Dec 28, 2025•6 Day Trip

$1,286 USD

Google Flights

Returning

Mon, Dec 29, 2025•7 Day Trip

$1,208 USD

Google Flights

Returning

Tue, Dec 30, 2025•8 Day Trip

$1,306 USD

Google Flights

Returning

Wed, Dec 31, 2025•9 Day Trip

$1,222 USD

Google Flights

Returning

Thu, Jan 1, 2026•10 Day Trip

$1,401 USD

Google Flights

Returning

Fri, Jan 2, 2026•11 Day Trip

$1,866 USD

Google Flights

Returning

Sat, Jan 3, 2026•12 Day Trip

$1,906 USD

Google Flights

Returning

Sun, Jan 4, 2026•13 Day Trip

$1,749 USD

Google Flights

Returning

Mon, Jan 5, 2026•14 Day Trip

$1,319 USD

Google Flights