Finnair Flight 5645 Deals & Information (2025/2026)

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Finnair Flight 5645 Route Deals From $758

The cheapest prices found with in the last 7 days for return flights were $645 and $758 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 1 - Wed, Oct 29
MAD
Adolfo Suárez Madrid-Barajas
BOS
Logan Intl.
$645 Roundtrip, found 6 days ago
$645
Roundtrip
found 6 days ago
Select Finnair flight, departing Wed, Oct 1 from Adolfo Suárez Madrid-Barajas to Logan Intl., returning Wed, Oct 29, priced at $645 found 6 days ago