The caskets of Levi Shirley, Jordan MacTaggart and William Savage were due to arrive home Friday after a complicated journey without ceremony.
Shirley and MacTaggart are from Colorado. Savage, of Maryland, will be transported to North Carolina, where his father lives.
Their families will each be presented with a flag flown over the US Capitol.
The men died separately in combat after joining the People's Protection Units the main Kurdish guerrilla group battling the Islamic State in Syria.