Zardnaar
Legend
A huge percent of airplane travel costs is fuel. Fuel is now zero in price.
Another huge cost is airplanes. They have so many some airlines are going to go bankrupt and there are going to be dirt cheap airplanes for sale.
So flight costs are now labour, which there is also a surplus of, plus airport fees, taxes and overhead.
There are so many crazy crazy forces pushing prices around it isn't funny. Inflationary, deflationary, etc. You can make a case for nearly any price direction; and you could be right, even if your argument isn't actually why it happened.
You can make some good guesses.