$843 Cheap United flights Washington (IAD) to Lisbon (LIS)

View $843 flight on Tue, Apr 28, 2026Opens in a new window

$843 Cheap United flights Washington (IAD) to Lisbon (LIS)

Prices were available within the past 7 days and start at $843 for one-way flights and $1,069 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Apr 28 - Thu, May 7
IAD
Washington
LIS
Lisbon
$1,069 Roundtrip, found 19 hours ago
$1,069
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Apr 28 from Washington to Lisbon, returning Thu, May 7, priced at $1,069 found 19 hours ago

Find the cheapest month to fly from Washington (IAD) to Lisbon (LIS)

February is typically the cheapest month to fly

From $478 - $895 per traveler.
Flights from Washington (IAD) to Lisbon (LIS)
Origin airport
Washington Dulles Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Brussels Airlines, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Popular airline
Air Canada
Distance
5732 km
Average flight time
12 hours 6 mins