4Z921 JohannesburgJNB · 07:30 Cape TownCPT · 07:30
4Z921 by Airlink flies from Johannesburg (JNB) to Cape Town (CPT) for the Tue, Sep 8 departure.
departs JNB · on schedule
board checked 22m ago · checking again in 45s
⚖ 4Z921 typically leaves +14 and lands −12. The air wins minutes back.Where the minutes go
last 7 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −12 min · 0 cancelled · 9 operations tracked
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by JNB (Johannesburg), currently flying LIFR (low instrument). For this route and airline, under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Johannesburg to Cape Town flights today
same route · AirlinkIf 4Z921 is cancelled, these are the other Airlink nonstop flights from Johannesburg to Cape Town on the same day, with scheduled departure times in JNB local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How 4Z921 actually runs
Pro Flight Search has tracked every published board update for 4Z921 across the JNB and CPT boards: schedule changes, gate pushes and actual clocks. Usually lands ~12 min early. Based on 9 confirmed landings · 9/9 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how 4Z921 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as JNB and CPT published them.
Planning around 4Z921? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search — 4Z921 Johannesburg to Cape Town on-time performance, measured from the JNB and CPT airport boards.
https://proflightsearch.com/flight/4Z921
.