Fog has started to clear at Auckland airport after causing the cancellation or delays of nearly 50 domestic flights today.

The fog delayed 18 departures and nine flights were cancelled, while 14 inbound flights were delayed and eight were cancelled.

Shortly before 10am the fog began to lift and the airport said it was hoped it would allow domestic flight schedules to return to normal.

Passengers on cancelled flights were expected to be transferred to other flights.

International flights were not affected as they used different systems, said an airport spokeswoman.

NZHerald