Lisbon (LIS) to Boston (BOS) flight deal in economy from $512
$738 USD
-31%$512 USD
Verified about 17 hours agoAugust 2026
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Fair Availability
24% of dates checked are available within 10% of the lowest price
Monday, August 31st, 2026
5 round-trip options
Returning
Sat, Sep 5, 2026•5 Day Trip
$844 USD
Returning
Mon, Sep 7, 2026•7 Day Trip
$787 USD
Returning
Wed, Sep 9, 2026•9 Day Trip
$786 USD
Returning
Thu, Sep 10, 2026•10 Day Trip
$802 USD
Returning
Sat, Sep 12, 2026•12 Day Trip
$794 USD