Humberside Police is to lose its force helicopter next year when it joins the National Police Air Service (NPAS).
Northern Lincolnshire will, instead, be served by a helicopter based in Wakefield.
Called 'Oscar 99', the current Humberside helicopter operates out of Humberside airport.
It is expected that the base will close in September 2016.
It comes as the NPAS announced plans to cut 10 of its helicopter bases over the next two years.
The Humberside force area, which covers East Yorkshire and northern Lincolnshire, will then be served by aircraft based in Wakefield, West Yorkshire.
It means the nearest available NPAS aircraft will attend requests from forces rather than Humberside owning and operating their own helicopter in isolation.
Chief Superintendent Ian Whitehouse, of NPAS, said: "This move will help improve the efficiency and effectiveness of the service and mean that every base supports police forces 24hours a day. It is a move based on an analysis of potential threat, risk and harm to the public we serve."
