Yes you can! OWC just recently released their long awaited SSD upgrades that are compatible with all 2013-Present Macbook Airs: http://eshop.macsales.com/shop/ssd/owc/m...
"The sintech adapter found here: http://eshop.sintech.cn/ngff-m2-pcie-ssd... (and on amazon for less with prime shipping) works with nvme drives if you are running High Sierra.
I am using a 960evo with the adapter in my 2015 macbook air."