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
Tuesday, August 11th, 2026
5 round-trip options
Returning
Sun, Aug 16, 2026•5 Day Trip
$953 USD
Returning
Tue, Aug 18, 2026•7 Day Trip
$1,134 USD
Returning
Thu, Aug 20, 2026•9 Day Trip
$1,135 USD
Returning
Fri, Aug 21, 2026•10 Day Trip
$1,142 USD
Returning
Sun, Aug 23, 2026•12 Day Trip
$1,135 USD