Online check-in Discovery Air - https://www.check-in.site

I'm sorry, but as of my knowledge cutoff in September 2021, I couldn't find any specific information about an airline called Discovery Air. It's possible that this is a smaller or regional airline that may not be widely known or have extensive online resources.

However, in general, many airlines offer online check-in services to their passengers. Online check-in allows you to confirm your travel details, select seats, and obtain a boarding pass in advance, usually from the comfort of your own home or using a mobile device. This can save time and make the airport experience more convenient.

If you're looking for information about online check-in for a specific airline, I would recommend visiting the official website of the airline or contacting their customer service directly. They will be able to provide you with the most accurate and up-to-date information about their check-in procedures, including whether online check-in is available and how to access it.