Which hairdryer can I use the air diffuser with? 23 September 2019 07:50 Updated The diffuser can only be used with the ghd air® hairdryer. Unfortunately, this will not work with the ghd flight®. Related articles ghd flight® travel hair dryer ghd air® hair dryer What is the difference between the ghd hair dryers? What is the wattage of the ghd hairdryers? What is the warranty on my product?