Some airports allow you to go to the ‘wrong’ terminal because there are services there. For example help desks, entertainment/relaxation areas for long layovers, children play areas, some have hotels in the airport, lounges, food/restaurants and more. Some airports also have the terminals connected after security, so you can go from one terminal to the other without having to go through security again. It really depends on the airport.
Etunim t1_j9u5wjo wrote
Reply to ELI5: How does airport technology, still allow people to check in and pass through TSA if Im at the wrong Terminal. by Witty_Buddy7951
Some airports allow you to go to the ‘wrong’ terminal because there are services there. For example help desks, entertainment/relaxation areas for long layovers, children play areas, some have hotels in the airport, lounges, food/restaurants and more. Some airports also have the terminals connected after security, so you can go from one terminal to the other without having to go through security again. It really depends on the airport.