IcelandairFI
Flights FI537 12:50 Mo Fr
live
Direct flights from Prague (PRG) to Reykjavík (KEF): 2 nonstop departures observed each week across 1 airline. The median arrival is 13 minutes late. No cancellations were recorded across the 2 tracked flights. The nonstop covers 2,653 km, an estimated 3 hours 54 minutes in the air. Measured by Pro Flight Search from live flight boards at Prague and Reykjavík. Updated 3 November 2026 at 11:38 UTC.
PRG
Prague
smooth · +8
KEF
Reykjavík
smooth · +0
2,653 km · ~3h 54m est.
Running clean · 1 airline · 2x weekly · nonstop
80 / 100
route health from live PRG and KEF delay boards
Median arrival delay is +13 min. 0 of 2 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+13 minacross the last 2 arrivals
Flight time~3h 54mestimated 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
Conditions are tightest at PRG and KEF: a 36% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +3 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the Prague to Reykjavík route actually runs
Pro Flight Search records official board updates for nonstop PRG to KEF 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: Prague (PRG) to Reykjavík (KEF) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/PRG-KEF
PRG to KEF questions
Is PRG–KEF running on time right now?
Mostly on schedule. The departure side at PRG is the weaker end, route health score 80/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from PRG to KEF?
Great-circle distance is 2,653 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 217–257 min gate-to-gate on this route.
How often does PRG–KEF fly?
Icelandair runs the route with about 2 flights a week (mon, fri). 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 PRG and arrival-side delay at KEF, 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.
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