Where to Find and Catch Cutiefly
From Pokemon Go Wiki
Cutiefly are found and captured in Nest and Habitat locations.
Nests
Cutiefly Nests are locations that consistently spawn Cutiefly.
Habitats
Cutiefly Habitats are spawn locations where Cutiefly is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: