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
Wednesday, August 26th, 2026
5 round-trip options
Returning
Mon, Aug 31, 2026•5 Day Trip
$770 USD
Returning
Wed, Sep 2, 2026•7 Day Trip
$781 USD
Returning
Fri, Sep 4, 2026•9 Day Trip
$781 USD
Returning
Sat, Sep 5, 2026•10 Day Trip
$781 USD
Returning
Mon, Sep 7, 2026•12 Day Trip
$781 USD