Actually, I do. And a very good friend of mine owns a private charter business. The could probably have hired a 10-seat private charter from Perugia to SeaTac for a one-way cost of something in the region of $30,000-$50,000. The aircraft would almost certainly have had to refuel in Nova Scotia, but a decent plane could have done the total journey in around 10-11 hours.
By contrast, 6 rooms in a reasonable hotel in Rome overnight (assuming some sharing of rooms) would be maybe £1,000. 10 last-minute full-fare flights Rome-LHR would be around $300 each = $3,000 total. 10 last-minute full-fare flights LHR-SEA would be around $1,500 (current BA one-way quote for tomorrow's LHR-SEA flight is £1,050 for the cheapest economy seat) = $15,000 total. So total travel costs for the group would have been around $20,000.
So the answer is yes, of course it's still cheaper to do things via commercial flights and overnight stays in hotels. But it's not an order of magnitude different. And that's also assuming that all the commercial flight sectors are in economy (coach) class. If we are talking about seats in business class (let alone first class), then there is probably a near parity in costs.