SOF-LHR-HEL-JFK experience
Does anyone here have experience with SOF-LHR-HEL-JFK trip with an overnight stay in HEL and a visa requirement to enter Schengen and USA? I'd like to learn about online check-in experience - were you able to check-in for any of these segments online? If not, were you able to get the visa checked in LHR before an immediate turnaround in SOF? Does BA require a visa check before check-in for a Sofia to Schengen/Finland trip?
I have read stories in other threads, but none seem to have had a visa requirement (only covid doc checks, which seem to be "hackable" in the app). I also didn't see any stories when they failed to check-in and missed the flight. Does this ever happen?