Cheapest return flights from Washington to Lisbon in October from $543

AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS) in October 2026 (see full year).

Return flights

23 Oct - 28 Oct Royal Air Maroc
26 Oct - 31 Oct Royal Air Maroc
13 Oct - 27 Oct Turkish Airlines
22 Oct - 05 Nov TAP direct
13 Oct - 27 Oct TAP direct
23 Oct - 28 Oct TAP direct
26 Oct - 31 Oct TAP direct

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

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