Online check in times
Some airlines will open online checkin for a flight 2 weeks or even a month in advance, making it much more likely a passenger will have access to internet and printer.
Other airlines don't allow online checkin until 24 or 30 hours in advance.
I presume that on cost grounds an airline prefers passengers checkin online rather than at an airport desk which would incur additional human involvement and monetary cost
I accept that the USA might have Govt imposed rules around this, but looking purely at travel within the EU, why do some airlines have such a short time window for online checkin ? Is it purely down to legacy IT infrastructure that can't cope, or is there another reason behind this ?