Question
 

I was wondering if any of you kind people could help me out. If I have an international flight with a domestic layover, do I check in at the domestic counter or international?

Check in international

Ditto! check in at the international counter (if they have
separate ones)

Welcome to Flyer Talk!

As a suggestion, you will find that you get better and more responses by using a more descriptive header. In this case, it didn't really matter as it was an easy question with a one word answer. In future, it might make a difference.

JR

Also, as a followup, you cannot do curbside checkin-but, counter checkin was implied in your question.

Have fun.

Thanks everyone!