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

Monday, August 10th, 2026

3 round-trip options

Returning
Tue, Aug 18, 20268 Day Trip
$1,388 USD
Returning
Thu, Aug 20, 202610 Day Trip
$886 USD
Returning
Sun, Aug 23, 202613 Day Trip
$1,877 USD