*A Check In
 

I am flying IAD-SFO-ICN-PEK with IAD-ICN booked on UA as one PNR and ICN-PEK on OZ on a separate PNR.

I will only have a carry on so would love to be able to check in for the OZ leg in advance. The layover at ICN is from 4-8am so plenty of time if I need to enter immigration then check in.

OLCI seems to be disabled since there is a document check for mainland flights.

I see there as being 2 options to get the BP in advance:
1) trying to get UA to issue the BP at IAD
2) leaving security at SFO to go to the OZ desk (which will be open for their flight to ICN)

Any ideas for how to get this to work?

1) UA won't touch your OZ booking

2) you can try with OZ at SFO but I'd be surprised if this works

I'd put my bet on the transfer counter at ICN being able to do the document check and issue the boarding pass.

Worst case you have enough time to exit landside.

Ask UA in IAD, but expect nothing. Once you land in ICN, just go to the OZ transfer desk on arrival and get you boarding pass for the next flight. Since you have 4h in ICN you should be fine. No need to enter Korea.

Thanks all! Hopefully the transit desk is open at 4am. I can update this next week with what ended up working.