Online check-in AeroUnion - https://www.check-in.site

I'm sorry, but as an AI language model, I don't have real-time information or access to specific airline systems. However, I can provide you with general information about online check-in.

To check-in online with AeroUnion or any other airline, you typically need to visit their official website and look for the online check-in option. Online check-in allows you to complete the check-in process and obtain your boarding pass electronically before arriving at the airport. It can save you time and provide convenience, especially if you don't have any checked baggage.

Here are some general steps to follow for online check-in:

1. Visit AeroUnion's official website. You can search for it using a search engine.

2. Look for the online check-in section on their website. This is usually located under the "Manage Booking" or "Check-in" tab.

3. Provide the required information. This may include your booking reference number, e-ticket number, or personal details such as your name and departure date.

4. Select your preferred seat if available. Some airlines allow you to choose your seat during online check-in, while others may assign it automatically.

5. Review your flight details and passenger information to ensure accuracy.

6. Once you've completed the check-in process, you'll usually have the option to either print your boarding pass or receive it electronically on your mobile device via email or a mobile app.

7. If you've printed your boarding pass, make sure to bring it with you to the airport. If you received it electronically, ensure that you have it accessible on your mobile device.

It's important to note that specific procedures and options for online check-in may vary depending on the airline and their policies. If you have any specific questions or need assistance with AeroUnion's online check-in process, I recommend contacting their customer service directly or visiting their website for the most up-to-date information.