Cheapest return flights from Washington to Lisbon in September from 741€

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

07 Sep - 20 Sep Delta
04 Sep - 13 Sep Delta
17 Sep - 24 Sep British Airways

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

Skyscanner

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon