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

Wednesday, December 9th, 2026

3 round-trip options

Returning
Mon, Dec 14, 20265 Day Trip
$486 USD
Returning
Tue, Dec 15, 20266 Day Trip
$468 USD
Returning
Sun, Dec 20, 202611 Day Trip
$703 USD