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

Sunday, December 27th, 2026

3 round-trip options

Returning
Fri, Jan 1, 20275 Day Trip
$868 USD
Returning
Sat, Jan 2, 20276 Day Trip
$993 USD
Returning
Thu, Jan 7, 202711 Day Trip
$773 USD