I have been a big fan of aircrafts since I was a kid and never missed an opportunity to wave at them when they used to fly past my house. Anybody who must have attended an air show can yell you how thrilling it can be when aviators display their flying skills to the spectators in aerobatics. U.S has the longest season with shows running from March until November whereas the season in Europe starts in late April and ends by mid October.
Some of the popular airshows across the world are:
Abbotsford Airshow
Aviation Nation
Dubai Air Show
MAKS
Miramar Airshow
Royal International Air Tattoo
Southport Airshow
Sunderland International Airshow
These are some of the best airshows and if you get an opportunity to attend them I would suggest that you just grab it. In case you can't attend them I would suggest you watch them on your TV using some of packages available in the market such as directv.