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When flying to an isolated aerodrome for commercial air transport, what is the recommended distance from the destination to the destination alternate aerodrome?
  • A
    6 hours flight time.
  • B
    2 hours flight time.
  • C
    There is no need to have a destination alternate aerodrome.
  • D
    The distance varies based on the weather, approaches available and aircraft type.

EASA AIR OPS
Regulation (EU) 2017/363
CAT.OP.MPA.180 Selection of aerodromes — aeroplanes
(...)

(b) The operator shall select at least one destination alternate aerodrome for each instrument flight rules (IFR) flight unless the destination aerodrome is an isolated aerodrome or:

(1) the duration of the planned flight from take-off to landing or, in the event of in-flight replanning in accordance with CAT.OP.MPA.150(d), the remaining flying time to destination does not exceed six hours; and
(2) two separate runways are available and usable at the destination aerodrome and the appropriate weather reports and/or forecasts for the destination aerodrome indicate that, for the period from one hour before until one hour after the expected time of arrival at the destination aerodrome, the ceiling will be at least 2000 ft or circling height +500 ft, whichever is greater, and the ground visibility will be at least 5 km.

Therefore, a flight to an isolated aerodrome doesn't need an alternate. That is the whole point of making it an isolated aerodrome.

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