Flying from San Francisco Tuesday Morning to JFK on AA24. Then taking a Finnair flight AY6 to Finland. Using frequent flyer miles for the Finnair flight so trips are on a separate ticket. I thus assume I cannot check in for the Finnair flight in SFO but need to check in in JFK. Where can I do that? Do I need to go outside and go through the security again?
Checking in at Terminal 8