Boston (BOS) to Helsinki (HEL) flight deal in economy from $391

Sunday, December 6th, 2026

3 round-trip options

Returning
Fri, Dec 11, 20265 Day Trip
$486 USD
Returning
Sat, Dec 12, 20266 Day Trip
$397 USD
Returning
Thu, Dec 17, 202611 Day Trip
$468 USD