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

Saturday, December 5th, 2026

3 round-trip options

Returning
Thu, Dec 10, 20265 Day Trip
$468 USD
Returning
Fri, Dec 11, 20266 Day Trip
$486 USD
Returning
Wed, Dec 16, 202611 Day Trip
$468 USD