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

Friday, December 25th, 2026

3 round-trip options

Returning
Wed, Dec 30, 20265 Day Trip
$844 USD
Returning
Thu, Dec 31, 20266 Day Trip
$779 USD
Returning
Tue, Jan 5, 202711 Day Trip
$753 USD