Boston (BOS) to Helsinki (HEL) flight deal in economy from $431
$665 USD
-35%$431 USD
Verified about 6 hours agoDecember 2026
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Fair Availability
32% of dates checked are available within 10% of the lowest price
Wednesday, December 23rd, 2026
10 round-trip options
Returning
Mon, Dec 28, 2026•5 Day Trip
$876 USD
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Tue, Dec 29, 2026•6 Day Trip
$882 USD
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Wed, Dec 30, 2026•7 Day Trip
$909 USD
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Thu, Dec 31, 2026•8 Day Trip
$844 USD
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Fri, Jan 1, 2027•9 Day Trip
$862 USD
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Sat, Jan 2, 2027•10 Day Trip
$959 USD
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Sun, Jan 3, 2027•11 Day Trip
$1,034 USD
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Mon, Jan 4, 2027•12 Day Trip
$814 USD
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Tue, Jan 5, 2027•13 Day Trip
$844 USD
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Wed, Jan 6, 2027•14 Day Trip
$767 USD