Hi, I am planning a trip to France and would like to know how it works with the layover.
The flight will be a through booking:
Somewhere - New York - Lisbon (8 hour layover) - Lyon, France.
All legs will be on the same ticket operated by the same airline (TAP) except for the first leg which will be operated by JetBlue.
Since the layover is very long, I'd like to leave the Lisbon airport and go into the city for the day and go back to the airport at night to catch the flight to Lyon. Now my question is: how does immigration and custom work if I don't leave the airport or if I do leave the airport in Lisbon.
My understanding is:
if I don't leave the Lisbon airport:
1a. I will need to go through immigration at Lisbon airport upon arrival from New York;
1b. I won't collect my checked bag in Lisbon. After going through immigration, I go to the next gate and catch my flight to Lyon.
1c. I see my checked bag in Lyon for the first time after I checked it in at Somewhere. I collect it and go through customs in Lyon.
if I do leave the Lisbon airport:
2a. I will need to go through immigration at Lisbon airport upon arrival from New York; (same as 1a)
2b. What do I do with my checked bag now? Do I collect it and go through custom in Lisbon, then immediately recheck it (like you do when you arrive in the US and need to make a connection), then leave the airport, or is everything the same as in scenario 1?
Are my understanding in scenario 1 all correct? What happens for scenario 2b? Any advice would be appreciated. Thanks!