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Preparing your page…Direct flights from Washington Dulles International Airport in United States to Lisbon Humberto Delgado Airport in Portugal.
2 airlines operate this route.≈ 3.6 flights/day · verified from live schedules, updated Jul 2026
Verified from live airline schedules · last updated July 2026. Averaged over the most recent 7 days of operations.
Carriers operating direct flights on this route. Click any airline for its full network, hubs, and loyalty program.
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Based on the latest verified schedules, there are on average 3.6 flights per day from Washington Dulles International Airport (IAD) to Lisbon Humberto Delgado Airport (LIS), as of July 2026.
United Airlines, TAP Air Portugal currently operate direct flights on this route.
Yes. 2 airlines operate direct flights on the IAD–LIS route, so a non-stop journey is available.
The estimated flight time is 7h 17m, covering a great-circle distance of 5,766 km between Dulles and Lisbon.
About this data. Route coverage is built progressively: OpenFlights is the historical bootstrap; AeroDataBox schedules replace it per airport once that origin has been refreshed. Flight frequencies and operators are verified against live airline schedules (averaged over the last 7 days). Distance is calculated as the great-circle distance between airport coordinates; estimated flight time assumes a typical cruise speed of 850 km/h with 30 minutes of taxi/climb buffer.