Route

Cheap flights from Washington to Lisbon

Updated August 11, 2026 · live fare · Magellan Flights

Quick answer

The cheapest flight from Washington (IAD) to Lisbon (LIS) we’re tracking is $426, around its typical price, departing 2026-09-23 → 2026-10-28. It’s real and bookable — refreshed daily.

$353 lowLow — great deal$614 high

See it live: this Washington–Lisbon fare is re-checked against live pricing and links straight to booking.

See live price on Aviasales →

About Lisbon

Lisbon tumbles over seven hills above the Tagus river — pastel facades, rattling trams, miradouro viewpoints and melancholic fado music.

Best time to visit Lisbon

The sweet spot is generally Mar–May & Sep–Oct — and the cheapest fares often land just outside peak season.

Top things to do in Lisbon

Ride Tram 28 through Alfama
Tour Belem Tower and Jeronimos Monastery
Eat a warm pastel de nata
Catch sunset from a miradouro
Day-trip to fairytale Sintra

Good to know

Very safe. Language: Portuguese. Visa for US passports: Visa-free, 90 days.

Frequently asked questions

How much is a flight from Washington to Lisbon?

The cheapest fare we're tracking from Washington (IAD) to Lisbon is $426, departing 2026-09-23. Fares move daily, so this page refreshes with the current low.

Are these Washington to Lisbon fares real and bookable?

Yes. Every fare is re-checked against live pricing and links to a secure booking page for that exact flight.

When is the cheapest time to fly to Lisbon?

The sweet spot for Lisbon is generally Mar–May & Sep–Oct - and the cheapest fares often land just outside peak season.

Do US citizens need a visa for Portugal?

Visa-free, 90 days. Always confirm current entry requirements before you book.