Programs: United 1K (ex CO), Avis Fancypants, Hyatt Platinum, SPG & Kimpton fan
I agree, as usual, with jiejie. In February, I connected from an inbound CO flight EWR-NRT to the TG 77W NRT-BKK flight, and I was on separate tickets, so I had to re-check in. No problem at all. NRT is exceptionally easy to navigate.