Up to 30 firefighters rushed to the popular wedding and conference venue, at Sywell Aerodrome, just before midnight on Thursday (March 3).
There are no reports of injuries although a spokesman for Northamptonshire Fire & Rescue said crews remain in attendance and Wellingborough Road will be shut between Holcot Lane and Glebe Road for most of Friday morning.
The Aviator is a unique hotel set in a historic 1930s Art Deco building which was once a clubhouse and officers’ mess, located on the edge of the airfield.
It also features a collection of original Sywell memorabilia from early aviation days.
