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	Midway Airlines Corporation Code: MDW
	Midwest Express Airlines Inc Code: MEP
	Mohawk Airlines Inc Code: N/A
	Monarch Airlines Ltd Code: MON
	Mountain Airlines Code: MTR
	MuseAir Code: N/A
	Nationair Canada Code: NXA
	National Airlines Inc (old co) Code: ROK
	National Airlines Inc (new co) Code: ROK
	New York Air Code: NYA
	Nordair Ltd Code: NDR
	North American Airlines Code: NAS
	North Central Airlines Inc Code: NCA
	Northwest Airlines Inc Code: NWA
	Northwest Orient Code: NWI

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