Cheap flights from Washington to Sintra-Cascais Natural Park

View AU$606 flight on Sat, 8 Nov. 2025Opens in a new window

Popular airlines from Washington to Sintra-Cascais Natural Park

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • Virgin Atlantic

    Virgin Atlantic

  • British Airways

    British Airways

  • Delta

    Delta

  • TAP Portugal

    TAP Portugal

  • United

    United

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Cheap Flights from Washington (WAS) to Sintra-Cascais Natural Park (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.

TAP Portugal
Sun, 24 Aug. - Sat, 30 Aug.
IAD
Washington
LIS
Lisbon
AU$1,005 Return, found 1 day ago
AU$1,005
Return
found 1 day ago
Select TAP Portugal flight, departing Sun, 24 Aug. from Washington to Lisbon, returning Sat, 30 Aug., priced at AU$1,005 found 1 day ago
Turkish Airlines
Thu, 21 Aug. - Wed, 3 Sep.
IAD
Washington
LIS
Lisbon
AU$1,007 Return, found 1 day ago
AU$1,007
Return
found 1 day ago
Select Turkish Airlines flight, departing Thu, 21 Aug. from Washington to Lisbon, returning Wed, 3 Sep., priced at AU$1,007 found 1 day ago
Aer Lingus
Sun, 24 Aug. - Mon, 1 Sep.
IAD
Washington
LIS
Lisbon
AU$1,539 Return, found 1 day ago
AU$1,539
Return
found 1 day ago
Select Aer Lingus flight, departing Sun, 24 Aug. from Washington to Lisbon, returning Mon, 1 Sep., priced at AU$1,539 found 1 day ago
Royal Air Maroc
Sun, 24 Aug. - Mon, 1 Sep.
IAD
Washington
LIS
Lisbon
AU$1,579 Return, found 1 day ago
AU$1,579
Return
found 1 day ago
Select Royal Air Maroc flight, departing Sun, 24 Aug. from Washington to Lisbon, returning Mon, 1 Sep., priced at AU$1,579 found 1 day ago
American Airlines
Mon, 1 Sep. - Tue, 2 Sep.
IAD
Washington
LIS
Lisbon
AU$2,069 Return, found 1 day ago
AU$2,069
Return
found 1 day ago
Select American Airlines flight, departing Mon, 1 Sep. from Washington to Lisbon, returning Tue, 2 Sep., priced at AU$2,069 found 1 day ago
British Airways
Mon, 1 Sep. - Tue, 2 Sep.
IAD
Washington
LIS
Lisbon
AU$2,092 Return, found 1 day ago
AU$2,092
Return
found 1 day ago
Select British Airways flight, departing Mon, 1 Sep. from Washington to Lisbon, returning Tue, 2 Sep., priced at AU$2,092 found 1 day ago

Find the cheapest month to fly from Washington (WAS) to Lisbon (LIS)

November is typically the cheapest month to fly

From AU$587 - AU$1,444 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.