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

Thursday, December 10th, 2026

3 round-trip options

Returning
Tue, Dec 15, 20265 Day Trip
$468 USD
Returning
Wed, Dec 16, 20266 Day Trip
$468 USD
Returning
Mon, Dec 21, 202611 Day Trip
$633 USD