New Zealand airports and its national carrier may be suffering the winter blues in new data showing the punctuality of global air travel. 

The June figures base its rankings on flights arriving and departing within 15 minutes of schedule. 

Air New Zealand has dropped to tenth in the Asia Pacific region after sitting in the top five earlier this year. 

No airport in the country cracked the global top 20. 

Air New Zealand General Manager of Airports Kate Boyer told Heather du Plessis-Allan the seasons play a big part in this. 

She says it's impacted by the likes of de-icing, foggy days, and storms throughout winter. 

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