Boston (BOS) to Helsinki (HEL) flight deal in economy from $375
$646 USD
-42%$375 USD
Verified about 22 hours agoJuly 2026
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Fair Availability
25% of dates checked are available within 10% of the lowest price
Monday, July 20th, 2026
10 round-trip options
Returning
Sat, Jul 25, 2026•5 Day Trip
$754 USD
Returning
Sun, Jul 26, 2026•6 Day Trip
$1,195 USD
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Mon, Jul 27, 2026•7 Day Trip
$730 USD
Returning
Tue, Jul 28, 2026•8 Day Trip
$850 USD
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Wed, Jul 29, 2026•9 Day Trip
$973 USD
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Thu, Jul 30, 2026•10 Day Trip
$768 USD
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Fri, Jul 31, 2026•11 Day Trip
$900 USD
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Sat, Aug 1, 2026•12 Day Trip
$730 USD
Returning
Sun, Aug 2, 2026•13 Day Trip
$923 USD
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Mon, Aug 3, 2026•14 Day Trip
$730 USD