Cheapest one-way flights from Washington to Lisbon in April from 242€

AirHint found the following cheapest one-way flights from Washington (IAD) to Lisbon (LIS) in April 2026 (see full year).

One-Way flights

27 Apr Frontier Airlines
15 Apr Frontier Airlines
17 Apr Frontier Airlines
20 Apr Icelandair
05 Apr Royal Air Maroc
03 Apr Royal Air Maroc
01 Apr Frontier Airlines
23 Apr Turkish Airlines
15 Apr United direct
20 Apr United direct

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

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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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