Originally Posted by
Dave Noble
I cannot see that there is any way that a domestic flight outside of EU being cancelled/delayed would have any chance of being viewed as covered - not surprised that it hasn't been tested since it is clear from regulation that such a flight is outside the scope
The ground seems to be shifting on that and I wouldn't be so confident on saying it absolutely isn't covered these days. Here is a nonEU flight by a nonEU airline which was delayed and which the ECJ thinks is covered as it was part of a single reservation
Recent ECJ judgement CS and Others v České aerolinie a.s. C-502/18
CURIA - Documents
a bit of summary
...in the case of connecting flights, where there are two flights that are the subject of a single reservation, departing from an airport located within the territory of a Member State and travelling to an airport located in a non-Member State via the airport of another non-Member State, a passenger who suffers a delay in reaching his or her destination of 3 hours or more, the cause of that delay arising in the second flight, operated, under a code-share agreement, by a carrier established in a non-Member State, may bring his or her action for compensation under that regulation against the Community air carrier that performed the first flight.