Flying is an unusual product that gets cheaper over time. Supply has increased.

Airbnb has had an impact on hotel pricing and availability.

It's commonly understood that not all prices change in lock step, but "inflation" is the general or aggregate change in prices, usually based on the change in the purchasing power of money. Choosing to finance or pay cash for a car or a house doesn't change the price of the item, just your cost of acquiring it - it exposes you to expected future inflation, in addition to the current price, because you will be paying back the incurred debt with less-valuable future dollars. The interest you pay also pays for the use of someone else's money for the period of the debt.

Note, too, that inflationary monetary policy is also implemented by creating money in other ways, like a printing press, and inflation can also be caused by supply/demand shocks, like changes in supply/demand of fundamental commodities, like oil.

Just an example: https://www.slice.ca/travel/photos/most-popular-travel-spots...

A lot longer than that: https://en.wikipedia.org/wiki/Grand_Tour

And a lot longer than that: http://ieg-ego.eu/en/threads/europe-on-the-road/the-history-...