I thought it was 4 grand, but for two days' worth of activities including a bombing run and the like.
I forgot which bomber it was, but it was $400 for about an hour's ride around town (Denver) maybe a decade ago from an air show at either Jeffco pr Centennial Airport.
I guess that would be about $600 nowadays for inflation. No real frills, just sightseeing and a view of the mountains, from what I gathered. It was not in either Fifi or Doc and I did not take the ride.