Which hairdryer can I use the air diffuser with? September 23, 2019 09:17 Updated 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? ghd flight® travel hair dryer What is the warranty on my product? Can I use my ghd product outside of the US?