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

Wednesday, December 30th, 2026

3 round-trip options

Returning
Mon, Jan 4, 20275 Day Trip
$876 USD
Returning
Tue, Jan 5, 20276 Day Trip
$814 USD
Returning
Sun, Jan 10, 202711 Day Trip
$959 USD