From The Danang international Airport (DAD) and Danang Railway Station :

Taxi: this is a fast and convenient method of transport (recommended Mailinh Taxi or Vina Sun taxi)…It is about 35 kms away from the airport/railway to the retreat Hoi An homestay where, if you call us in advance, you will be met by our driver who will drive you to the home with a reasonable cost.

From Hue/Nha Trang /Da Lat

Sleeping bus: It is recommended you to take sleeping bus from Hue to Hoi An (Camel travel, Hanh Café, Sinh Café...) with a cost of around $10/way.

Railway: Other option for transfer from Hue to Hoi An is to take a train then take taxi/car from Danang Train station to Hoi An