Which hairdryer can I use the air diffuser with? 21 June 2019 10:13 The diffuser can only be used with the ghd air® hairdryer. Unfortunately, this will not work with the ghd flight®. Related articles What is the difference between the ghd hair dryers? What is the wattage of the ghd hairdryers? Can I use my ghd product outside of the UK? ghd flight® travel hair dryer What is the warranty on my product?