Sorry, one more option. Just found a flight on Asiana that gives two extra hours, so I could have 5 hours total layover within Terminal 1. If I am forced to check my bag on the first flight, is 5 hours long enough to go through immigration/customs/baggage claim/security? Like long enough that I shouldn't have to worry about timing at all, or like...still cutting it close enough that I should be trying my best to sneak my backpack onto the first flight? (the problem is how strict some airlines are on weight, the actual size definitely always fits in the overhead). Thank you!