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

Monday, August 31st, 2026

3 round-trip options

Returning
Tue, Sep 8, 20268 Day Trip
$582 USD
Returning
Thu, Sep 10, 202610 Day Trip
$492 USD
Returning
Sun, Sep 13, 202613 Day Trip
$644 USD