TAP Air PortugalTP
live
Direct flights from Lisbon (LIS) to Washington (IAD): 14 nonstop departures observed each week across 2 airlines. 100% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 12 minutes early. No cancellations were recorded across the 6 tracked flights. The nonstop covers 5,766 km, an estimated 7 hours 54 minutes in the air. Measured by Pro Flight Search from live flight boards at Lisbon and Washington. Updated 22 October 2026 at 03:34 UTC.
Today, LIS → IAD
Thu 22 Oct · local times- 11:40 TP231TAP AIR PORTUGAL On scheduleT1 ·
- 12:20 UA943UNITED AIRLINES On scheduleT1 ·
- 17:15 TP233TAP AIR PORTUGAL Sched 17:15Departure not confirmed by the board ·
Checked LIS board 04:08 · IAD board 23:34
LIS
Lisbon
busy · +17
IAD
Washington
busy · +16
5,766 km · ~7h 54m est.
Runs reliable · 2 airlines · 14x weekly · nonstop
100% on time
of the last 6 operated LIS → IAD flights arrived within 15 minutes
Median arrival delay is −12 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−12 minacross the last 6 operated legs
Flight time~7h 54mestimated from route distance
Weekly departures14x2 direct airlines on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
TAP Air PortugalUnited Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysUnited AirlinesUA
Flights UA943 12:20 daily
History
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at LIS and IAD: 36% odds of a 15+ minute delay and around +4 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Lisbon to Washington route actually runs
Pro Flight Search records official board updates for nonstop LIS to IAD flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Lisbon (LIS) to Washington (IAD) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/LIS-IAD
LIS to IAD questions
Is LIS–IAD running on time right now?
Mostly on schedule. Both endpoints currently score the same, route health score 78/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on LIS–IAD?
Operators schedule morning departures around 11:40 and evening departures around 17:15 from LIS. Earlier flights typically land before destination-airport delays accumulate later in the day; check the IAD delay card to confirm conditions when you'd arrive.
How long is the flight from LIS to IAD?
Great-circle distance is 5,766 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 437–524 min gate-to-gate on this route.
How often does LIS–IAD fly?
2 carriers operate this route, around 21 flights a week between them. Compare carrier days and times in the airline list above.
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