Airfares are usually based on last years +/- a few percent, setting these fares as travel picks up will be very difficult as the environment will have completely changed. Expect a few wild swings as things settle down. I’m interested to see how much of a premium airlines will be able to change for business over economy. Normally it’s about 3x the price, with flights into New York up to 5x and flights into Bangkok down to 2x.
As business travel will take longer to recover I would expect to see cheaper fares in this cabin but more expensive in economy as airlines try to recover the loss of revenue. At the end of the day it all comes down to supply and demand, with the bean counters trying to maximise the income from each flight.