Today's drop ·
Cheap flights from Washington Dulles to Lisbon
$583 round trip right now, 25% under the $782 this route usually costs.
How cheap is this?
Telly prices every departure date six months out on this route, for trips of 2 to 14 nights, and measures each fare against what the route usually costs. The cheapest round trip right now is $583 on TAP Portugal, nonstop, against a usual $782. 34% under usual, among this route's lowest.
When to go
The cheapest dates fall in Nov–Jan, for trips of 10 to 11 nights. Nov in Lisbon runs around 72°. The dates come picked because a cheap fare only exists on certain days; the exact ones and the booking link are in the app.
Passport required
Lisbon is outside the US and Canada, so you need a passport. Every flight on Telly leaves the country; that is the whole filter.
Questions about this route
How much is a flight from Washington Dulles to Lisbon?+
Right now $583 round trip, on TAP Portugal. The route usually costs $782, so this fare is 25% under. Checked Nov 4, 2026.
When are the cheapest dates to fly to Lisbon?+
The cheapest dates Telly found are in Nov–Jan, for trips of 10 to 11 nights. It prices every departure date six months out on this route and keeps only the lowest. The exact dates are in the app.
Do I need a passport to fly from Washington Dulles to Lisbon?+
Yes. Lisbon is outside the US and Canada, and every flight on Telly leaves the country, so every one needs a passport.
