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

Thursday, December 17th, 2026

3 round-trip options

Returning
Tue, Dec 22, 20265 Day Trip
$930 USD
Returning
Wed, Dec 23, 20266 Day Trip
$748 USD
Returning
Mon, Dec 28, 202611 Day Trip
$923 USD