That’s an interesting question.
For starters, you have to remember that airplanes more more than just tourists.
Frieght operations such as UPS, FedEx, Airborne, and so forth simply can’t garauntee overnight, 2-day, or 3-day delivery without airplanes except in very limited geographic areas. Legal documents, as once example, must frequently still be sent on hardcopy still, so without these means of shipping there could be some disruption for those items that must travel in physical form. The US Post Office, by the way, is also heavily dependent on airplanes for moving mail over long distances, so mail delivery would slow down even more than present - it would be back to truck and rail for everything, not just some of it.
Some industries could survive without it, but it would be harder to get fresh fish and fresh-cut flowers and certain other very perishable items in winter in, say, Chicago or St. Paul.
Some places, like Alaska, Hawaii, and the Carribean no longer have the shipping capability they once had, or at least would require more than they presently have, in order to accomodate the needs of their populations without airplanes. Tibet, I believe, has airports but no railroads, so all frieght would revert to Yak-back and trucks. Loss of air travel would result in some very uncomfortable times, possibly even real hardship, until their economies adjust and shipping by sea and land can be increased.
Many businesses depend on air travel, either to move goods through the overnight services, or to move documents that must travel in material form, as well as moving personnel from place to place. Having employees drive themselves opens up legal liabilities companies don’t deal with at present, and we just don’t have efficient passenger rail in the US anymore. There would certainly be some disruption while people adjusted and this would be reflected in the bottom. Also, having had to switch some of my company’s meetings from face-to-face to videoconference, the technology is still expensive so you don’t always save money - you might even wind up paying more for remote meetings with participants in multiple locations. And the technology for that is still maturing.
One place where lack of air travel will have a life-or-death impact is in medicine. No air travel means no emergency airlifts. Since time is of the essence when medievac is used (the only way to justify the cost of those helicopters - they ain’t cheap) if it was eliminated probably more people would die en route to the hospital. Would also complicate wilderness search and rescue operations. In addition, transplant organs are transported by air (unless the weather makes flying impossible), as are certain other medical patients who need treatment at distant locations. In emergency situations, medical supplies can be shipped in by air to areas cut off by road (think earthquakes, floods, etc.) Without air travel likely more people would die in these circumstances than do presently.
No air travel will complicate forest fire fighting - we’ll lose more to the fires.
Not to mention that if you eliminate all air travel the air transit companies will all expire, rendering their stock worthless and causing havoc on Wall Street. You’ll have tens of thousands of unemployed professional pilots just in the US, plus all the service and support personnel - caterers, cleaners, security, ramp personnel, mechanics, ticket agents, etc. You can flush Boeing and Lockheed down the toilet - there’s not much left without airplanes. Not to mention other companies such as Piper, Cessna, Lycoming, Continental, Beechcraft, Robinson, Hughes… who employ not just pilots and mechanics but secrtaries and accounts and cleaning staff… all of whom would be unemployed.
I’m not sure how much impact it will have on the petroleum industry - I know the aviation gasoline is an insignificant part of their business, but they’ll be selling a LOT less jet fuel. It may impact their bottom lines.
There are an estimated 600,000+ active licensed pilots in the US. Even those such as myself, who do this for fun and not profit, help support every small airport across America, which adds up to over a thousand small businesses employing anywhere from just one or two to scores of employees. All of those people would be out of work.
Many hotels depend on air travel. Restaurants based on airports depend on transients. After Sept 11 the local corner diner near my home airport almost went under because 75% of their businesss comes from the airport (which they didn’t know until then).
No air travel means millions of people out of work due to the ripple effect air travel has on the economy. Probably 2-5 million directly involved with airports (all sizes) and airplanes (produce, maintenance, flying). Probably an equal number from the lodging, tourism, and restaurant industries. And, oh yes, the entire FAA and all those air traffic controllers. That’s just in the US. The world economy would survive, but you’d notice the difference. There would be a LOT of disruption until things adjusted to other means of getting around and all the unemployed aviation folks retrained for other jobs.
I’m not sure that answers your question, but they are all factors to consider.