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

Tuesday, December 8th, 2026

3 round-trip options

Returning
Sun, Dec 13, 20265 Day Trip
$397 USD
Returning
Mon, Dec 14, 20266 Day Trip
$486 USD
Returning
Sat, Dec 19, 202611 Day Trip
$703 USD