More issues today 06/01
LH400, LH410 and OS87 all turned round over the UK or Ireland and returned to FRA, MUC and VIE respectively
This seems to be because of ground congestion at JFK with planes waiting hours for a gate and then pax waiting hours for baggage.
I notice that according to FR24, the SAA203 (A346) from JNB landed this morning at JFK almost on time after a 15h29m flight time and then waited 4 hours for a gate.