Cheapest one-way flights from Washington to Lisbon in August from $335

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 August 2025 (see full year).

One-Way flights

18 Aug Icelandair
13 Aug Icelandair
12 Aug Icelandair
14 Aug Frontier Airlines
15 Aug Frontier Airlines
18 Aug TAP direct
15 Aug TAP direct
06 Aug Royal Air Maroc
07 Aug Royal Air Maroc
13 Aug TAP direct

Also check the deals for return flights from Washington to Lisbon in August.

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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