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

Friday, August 21st, 2026

3 round-trip options

Returning
Sat, Aug 29, 20268 Day Trip
$952 USD
Returning
Mon, Aug 31, 202610 Day Trip
$876 USD
Returning
Thu, Sep 3, 202613 Day Trip
$607 USD