Great Lakes Airlines will fly bigger airplanes between Pierre and Denver during the hunting season.
The airline plans on using 30-passenger airplanes for two of its three flights between those cities starting Sept. 17.
The hunting season is Pierre's busiest time for air travel. Mayor Laurie Gill says the larger planes will meet the need of getting hunters and other passengers to and from Pierre.
The third flight to Denver will continue to carry only nine people.
Air passenger service has been inconsistent in Pierre this year because of new federal regulations. Great Lakes officials have said the new rules increased the number of minimum hours pilots need to fly commercial aircraft. The airline has had to cancel or delay flights because it hasn't had enough pilots.