you can get a Seasonal Staff card which gives you up to 30% off with National Express.
It's the same with BritishRail, you can get any kind of discount card, it all depends on your age and if it convenient for you.
I know lots of people who live in Brighton and fly for us. The first check-in in the morning is 0500 in the summer and between 0530 and 0600 in the winter.