Cheapest return flights from Washington to Lisbon in September from $858

Best time to book flights for Washington (DCA) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Washington (DCA) to Lisbon (LIS) in September 2025 (see full year).

Return flights

17 Sep - 24 Sep jetBlue
03 Sep - 09 Sep Air Canada
29 Sep - 06 Oct British Airways
18 Sep - 22 Sep jetBlue
18 Sep - 23 Sep jetBlue
24 Sep - 29 Sep TAP
13 Sep - 21 Sep Air Canada
30 Sep - 14 Oct Air Canada
18 Sep - 25 Sep British Airways
19 Sep - 26 Sep Air Canada
15 Sep - 22 Sep Condor
11 Sep - 18 Sep British Airways

Also check the deals for one-way flights from Washington to Lisbon in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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