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

Sunday, December 13th, 2026

3 round-trip options

Returning
Fri, Dec 18, 20265 Day Trip
$687 USD
Returning
Sat, Dec 19, 20266 Day Trip
$703 USD
Returning
Thu, Dec 24, 202611 Day Trip
$468 USD