Cheap flights from Boston to Sintra

View AU$433 flight on Fri, 7 Nov. 2025Opens in a new window

Popular airlines from Boston to Sintra

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Cheap Flights from Boston (BOS) to Sintra (LIS)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Thu, 27 Nov. - Sun, 30 Nov.
BOS
Boston
LIS
Lisbon
AU$717 Return, found 6 days ago
AU$717
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Thu, 27 Nov. from Boston to Lisbon, returning Sun, 30 Nov., priced at AU$717 found 6 days ago
Air Canada
Mon, 8 Sep. - Wed, 24 Sep.
BOS
Boston
LIS
Lisbon
AU$769 Return, found 2 days ago
AU$769
Return
found 2 days ago
Select Air Canada flight, departing Mon, 8 Sep. from Boston to Lisbon, returning Wed, 24 Sep., priced at AU$769 found 2 days ago
United
Mon, 8 Sep. - Wed, 24 Sep.
BOS
Boston
LIS
Lisbon
AU$775 Return, found 2 days ago
AU$775
Return
found 2 days ago
Select United flight, departing Mon, 8 Sep. from Boston to Lisbon, returning Wed, 24 Sep., priced at AU$775 found 2 days ago
TAP Portugal
Fri, 7 Nov. - Sun, 9 Nov.
BOS
Boston
LIS
Lisbon
AU$792 Return, found 3 hours ago
AU$792
Return
found 3 hours ago
Select TAP Portugal flight, departing Fri, 7 Nov. from Boston to Lisbon, returning Sun, 9 Nov., priced at AU$792 found 3 hours ago
Swiss International Air Lines
Tue, 9 Sep. - Tue, 16 Sep.
BOS
Boston
LIS
Lisbon
AU$795 Return, found 4 days ago
AU$795
Return
found 4 days ago
Select Swiss International Air Lines flight, departing Tue, 9 Sep. from Boston to Lisbon, returning Tue, 16 Sep., priced at AU$795 found 4 days ago
Aer Lingus
Tue, 9 Sep. - Tue, 16 Sep.
BOS
Boston
LIS
Lisbon
AU$812 Return, found 4 days ago
AU$812
Return
found 4 days ago
Select Aer Lingus flight, departing Tue, 9 Sep. from Boston to Lisbon, returning Tue, 16 Sep., priced at AU$812 found 4 days ago

Find the cheapest month to fly from Boston (BOS) to Lisbon (LIS)

November is typically the cheapest month to fly

From AU$520 - AU$1,109 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.