Cheapest one-way flights from Washington to Lisbon in September from 272€

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

AirHint found the following cheapest one-way flights from Washington (IAD) to Lisbon (LIS) in September 2025 (see full year).

One-Way flights

06 Sep Icelandair
16 Sep Icelandair
15 Sep Royal Air Maroc
16 Sep TAP direct
15 Sep TAP direct
06 Sep TAP direct

Also check the deals for return 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.

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