The airlines overbook to maximise revenue and profits on the basis that on average a few people won't turn up
Like the mongrels who genuinely believe a plane wont leave without them, so don't need to get up in time. Strangely enough, this seems to happen more at Luton, unless its because the customer service desks are so close to the checkin desks you notice it more.
Probably one for Dr G to confirm...
Typically Easyjet Checkin closes an hour before the flight, and the gate at -30. The aircraft may still be over the channel at this point.
Typically there are two details sheeple over look...
1. If you check in online, hand luggage only and don't arrive at the airport until -65 you will miss your flight.
2. Gate Closed time is just that. This doesn't mean that you have 65 minutes to get to the gate, you have 35 minutes. It will take 25 minutes to get through security and a further 15 minutes to walk to the gate. Again you will miss your flight.
Stop for coffee/beer/shopping/toilet and you'll miss your flight. Of course, if you arrive in plenty of time, ie at -150/180 then you have enough time for a bite to eat, buy some snacks for the flight, find and get to the gate etc etc.
Arrive at the gate at -25 flustered, out of breath and carrying only the bags you arrived with, ie no shopping, and you will probably get on, but this depends on how the 165 passengers who arrived on time treated the gate staff and if you have a legitimate reason and had phoned ahead... ie accident/motorway closure train breakdown etc...
I recall picking up a well to do retired couple on behalf of another driver... I was ten minutes ahead of the booking time, we left about ten minutes after the booking time and they insisted on stopping for a paper, it was a Sunday. Eventually got going properly 20 minutes after their booked time. It transpired in the coversation that the time they had booked the cab for was -75. I queried this and was told it was fine as the aiport was only 15 minutes away and they had already checked in... By this point it was -50 and we were still 15 minutes away. I duly left them at the drop off with their luggage fully aware that they had missed their flight. The other driver received a call about an hour later to collect them as they couldn't get another flight for three days, so they decided to head back home instead... rather idiots, the pair of them.