Once you've purchased your ticket, you'll receive an e-mail including e-ticket Itinerary/Receipt kept in your reservation. If you are not able to print an e-ticket Itinerary/Receipt for some reasons, you may take a picture and keep it in your mobile device. But some countries might ask you to present it when you clear the immigration and customs. Please refer to the detailed information of your arrival countries.
Starting from July 1st, Jin Air(including Korean Air Codeshare Flights) will operate at Terminal 2 of the Incheon Airport.