Four flights were diverted from Ireland West Airport Knock this afternoon due to heavy fog conditions.
Flights from London Luton, Birmingham, Manchester and Edinburgh were forced to divert to Shannon and Dublin Airports.
Passengers on the London Luton flight were scheduled to arrive by buses to the airport at half past three.
All flights arriving from two o'clock onwards landed, owing to improved weather conditions.
Only one more flight is due in this evening, from Stanstead, and should land providing there is adequate visibility.