IcelandairFI
Flights FI578 16:00 Th Su
live
Direct flights from Reykjavík (KEF) to Lisbon (LIS): 2 nonstop departures observed each week across 1 airline. The median arrival is on schedule. No cancellations were recorded across the 3 tracked flights. The nonstop covers 2,940 km, an estimated 4 hours 16 minutes in the air. Measured by Pro Flight Search from live flight boards at Reykjavík and Lisbon. Updated 10 September 2026 at 17:23 UTC.
KEF
Reykjavík
smooth · +1
LIS
Lisbon
smooth · +1
2,940 km · ~4h 16m est.
Running clean · 1 airline · 2x weekly · nonstop
100 / 100
route health from live KEF and LIS delay boards
Median arrival delay is −1 min. 0 of 3 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−1 minacross the last 3 operated legs
Flight time~4h 16mestimated from route distance
Weekly departures2x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Icelandair
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 daysHistory
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 KEF and LIS: 40% odds of a 15+ minute delay and around +6 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 Reykjavík to Lisbon route actually runs
Pro Flight Search records official board updates for nonstop KEF 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 — Reykjavík (KEF) to Lisbon (LIS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/KEF-LIS
KEF to LIS questions
Is KEF–LIS running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from KEF to LIS?
Great-circle distance is 2,940 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 238–282 min gate-to-gate on this route.
How often does KEF–LIS fly?
Icelandair runs the route with about 2 flights a week (sun, thu). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at KEF 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.
.