I believe that there is no problem in matching your competitor's prices; provided that you aren't talking to them before the event!
Supermarkets, petrol stations etc all do price surveys to make sure that they are charging the same as their local competition and many stores also offer price matching guarantees. All of these are "price fixing" but aren't illegal as they don't communicate with their competitors before the prices are set.
With respect to the fuel hedging it is simply down to economics; if people are willing to pay $X for the ticket then charge $X - if your costs are lower than your competition due to your hedging then there is nothing that means that you have to pass that saving on to your customers.