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

Saturday, August 15th, 2026

3 round-trip options

Returning
Sun, Aug 23, 20268 Day Trip
$2,624 USD
Returning
Tue, Aug 25, 202610 Day Trip
$1,744 USD
Returning
Fri, Aug 28, 202613 Day Trip
$1,886 USD