How hard would it be for a CRNA to become a Flight Nurse? I have worked prehospital as an RN on a Critical Care ambulance that also responded to emergent calls, have CCEMT-P cert, and have the hospital reqs. Other than getting EMS certification as either EMT or EMT-P, what else would I need? What is involved in the CRFN course? Sometimes it ain't all about the Benjamins. Any takers..?