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
Thursday, August 20th, 2026
5 round-trip options
Returning
Tue, Aug 25, 2026•5 Day Trip
$959 USD
Returning
Thu, Aug 27, 2026•7 Day Trip
$964 USD
Returning
Sat, Aug 29, 2026•9 Day Trip
$976 USD
Returning
Sun, Aug 30, 2026•10 Day Trip
$980 USD
Returning
Tue, Sep 1, 2026•12 Day Trip
$980 USD