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

Saturday, December 12th, 2026

3 round-trip options

Returning
Thu, Dec 17, 20265 Day Trip
$693 USD
Returning
Fri, Dec 18, 20266 Day Trip
$916 USD
Returning
Wed, Dec 23, 202611 Day Trip
$686 USD