IAD → LISWashington to Lisbon

live

Direct flights from Washington (IAD) to Lisbon (LIS): 18 nonstop departures observed each week across 2 airlines. 93% of the last 15 tracked flights arrived within 15 minutes of schedule. The median arrival is 16 minutes early. No cancellations were recorded across the 15 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 Washington and Lisbon. Updated 4 November 2026 at 11:18 UTC.

IAD Washington smooth · +4
LIS Lisbon smooth · +0
5,766 km · ~7h 54m est.
dep bank 18:25–23:3018x weekly
Runs reliable · 2 airlines · 18x weekly · nonstop
93% on time

of the last 15 tracked IAD → LIS flights arrived within 15 minutes

Median arrival delay is −16 min. 0 of 15 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−16 minacross the last 15 arrivals
Flight time~7h 54mestimated from route distance
Weekly departures18x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 15

Who flies it

observed on the boards · 7 days
TAP Air PortugalTP100% on time

Flights TP232 varies Mo Tu We Th Fr Sa · TP234 varies We Th Fr Sa Su

United AirlinesUA86% on time

Flights UA942 varies daily

History

operated legs · board outcomes
11-03TP232dep +14 → arr−15
11-03UA942dep +32 → arr−16
11-02TP232dep +20 → arr−1
11-02UA942dep +13 → arr−12
11-01TP234dep +10 → arr−6
11-01UA942dep +36 → arr−1
10-31TP232dep +8 → arr−28
10-31UA942dep +15 → arr−23
10-30TP234dep +10 → arr−29
10-30UA942dep +59 → arr+27
10-29TP232dep +7 → arr−31
10-29UA942dep +19 → arr−7
10-28TP234dep +20 → arr−20
10-28UA942dep +15 → arr−34
10-27TP232arrived−39

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IADWashington +4 min smooth 🌤 few clouds · N 0 kt Full IAD delay board →
LISLisbon +0 min smooth 🌤 clear · NE 8 kt Full LIS delay board →

Weather lens

Conditions are tightest at IAD and LIS: a 35% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +4 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Washington to Lisbon route actually runs

Pro Flight Search records official board updates for nonstop IAD to LIS 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: Washington (IAD) to Lisbon (LIS) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAD-LIS
How we measure this →

IAD to LIS questions

Is IAD–LIS running on time right now?

Smooth skies ahead. The departure side at IAD is the weaker end, route health score 96/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from IAD to LIS?

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 IAD–LIS fly?

2 carriers operate this route, around 18 flights a week between them. Compare carrier days and times in the airline list above.

What does the route health score measure?

A blend of departure-side delay at IAD and arrival-side delay at LIS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.