Federal records show that the biplane was registered to Wicker, who lived in Loudon, Virginia. A man who answered the phone at a number listed for Wicker on her website said he had no comment and hung up.
One of the pilots listed on Wicker's website was named Charlie Schwenker. A post on Jane Wicker Airshows' Facebook page announced the deaths of Wicker and Schwenker and asked for prayers for their families.
A message left at a phone listing for Charles Schwenker in Oakton, Virginia, wasn't immediately returned.
Airport spokeswoman Linda Hughes and Ohio State Highway Patrol Lt. Anne Ralston confirmed that a pilot and stunt walker had died but declined to give their names. The air show also said it wouldn't immediately release their identities.
The show was canceled for the rest of the day, but organizers said events would resume Sunday and follow the previous schedule and normal operations. The National Transportation Safety Board said it is investigating the crash.
Another spectator, Shawn Warwick of New Knoxville, told the Dayton Daily News that he was watching the flight through binoculars.
"I noticed it was upside-down really close to the ground. She was sitting on the bottom of the plane," he said. "I saw it just go right into the ground and explode."
Than Tran, of Fairfield, said he could see a look of concern on the wing walker's face just before the plane went down.
"She looked very scared," he said. "Then the airplane crashed on the ground. After that, it was terrible, man ... very terrible."
Wicker's website says she responded to a classified ad from the Flying Circus Airshow in Bealeton, Virginia, in 1990, for a wing-walking position, thinking it would be fun. She was a contract employee who worked as a Federal Aviation Administration budget analyst, the FAA said.
She told WDTN-TV in an interview this week that her signature move was hanging underneath the plane's wing by her feet and sitting on the bottom of the airplane while it's upside-down.
"I'm never nervous or scared because I know if I do everything as I usually do, everything's going to be just fine," she told the station.
Wicker wrote on her website that she had never had any close calls.
"What you see us do out there is after an enormous amount of practice and fine tuning, not to mention the airplane goes through microscopic care. It is a managed risk and that is what keeps us alive," she wrote.
In 2011, wing walker Todd Green fell 200 feet (60 meters) to his death at an air show in Michigan while performing a stunt in which he grabbed the skid of a helicopter.
In 2007, veteran stunt pilot Jim LeRoy was killed at the Dayton show when his biplane slammed into the runway while performing loop-to-loops and caught fire.
Organizers were presenting a trimmed-down show this year and expected smaller crowds at Dayton after the Air Force Thunderbirds and other military participants pulled out this year because of federal budget cuts.
The air show, one of the oldest in the U.S., usually draws around 70,000 people. Without military aircraft and support, the show expected attendance to be off 30 percent or more.
