Min check-in of 15-30 mins can be done almost anywhere with limit dependent on terminal size. SEN do not set a limit, the airlines do. Nothing to stop Loganair for example coming along and offering 20 min check-in.
The airport recommends passengers arrive 2 hours before departure and Stobart runs the check-in desks and the baggage handling so the airlines have no say
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When to arrive at the airport? Our advice is to arrive at least two hours before your scheduled time of departure
Maybe longer today as the airport has a problem.
We are experiencing some technical issues at check-in. If you have bags to check please arrive early to avoid delays.
So if someone missed their flight by arriving 30 minutes before departure who do you think the airline and airport would blame?