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

Monday, August 17th, 2026

3 round-trip options

Returning
Tue, Aug 25, 20268 Day Trip
$1,627 USD
Returning
Thu, Aug 27, 202610 Day Trip
$1,496 USD
Returning
Sun, Aug 30, 202613 Day Trip
$2,028 USD