Originally Posted by Kromer

I did ask this in the Japan section and was told I likely would be fine. Just wanting to better understand the process and see if it was worth flying into Haneda and transferring to Narita. I would rather not do that

Also, unlear if I use the standard compliant 22" carry on for ANA if my backpack counts as a personal item as it fits under the seat. It does with United and I jusr want to make sure I am compliant in Osaka before I get on the plane.

There is only 1 non stop to Denver a day. I know if I miss it, United will book me on a plane through LAX or SFO and then Denver. Going through customs/immigration is so much easier when you go to your ride home when complete rather than working your way back through baggage check etc.