Americair Inc. will begin offering air taxi service between Dulles International Airport and Baltimore-Washington International Airport tomorrow. The new service, dubbed Federal Shuttle, will be based at Dulles and use nine twin-engine aircraft ranging from three- to eight-passenger capacity.

Americair President Dave Sullivan said fares for the 25-minute Federal Shuttle ride between Dulles and BWI will be $35, equivalent to or below fares charged by taxi companies. Passengers will be able to pay at the Americair gate at Dulles airport or at the departure desk at BWI.

The service will operate on a demand-and-fly basis even if only one passenger turns up for a flight.

Federal Shuttle will operate hourly between 6 a.m. and 10 p.m., Sullivan said. Americair is negotiating with the Federal Aviation Administration for rights to operate out of National Airport, he said, with the proposed fare for the 15-minute flight between Dulles and National airports $22.

Americair is also introducing an immediate on-demand service called "turn up and take off," in which Americair will fly a passenger to any of the airports served at any time for an additional $10 surcharge, he said.

Americair also offers 24-hour, on-demand charter service to all destinations East of the Mississippi River and a daily 45-minute flight from Dulles to Richmond for $45.

Sullivan formed Americair from Squadron Aviation, a flight training center he founded at Dulles in 1979. Sullivan, who grew up in Glen Burnie, is a University of Maryland graduate and former Air Force and D.C. Air National Guard pilot.