I'll be traveling from the US to Laos and switching airlines at the Incheon airport. I'll be arriving Delta and departing Jin Air. I assume I'll have to claim my bags and recheck with Jin Air. Do I go through customs? What is the process there. Also, I purchased a lounge pass through Jin Air as I have a 7 hour layover. Anyone know how to claim that pass? Do I simply show them the receipt? Couldn't find info on this on Jin Air's website.

Thanks,

Delta has an internal flight agreement with Jin Air. You may need not claim and recheck your baggage but it's better to ask the staff at the check-in counter regarding the interline baggage policy.

At Incheon airport, you will arrive at Terminal 2. This is the newer terminal. And big chance, your lounge will be KAL Lounge operated by Korean Air and shared with Jin Air.