Your version of the lyrics isn't too far off. I have the White Album here, and have just put it on...my singing the song didn't quite help to clarify
....this is what I hear:
flew in from Miami Beach BOAC didn't get to bed last night..on the way the paper bag was on my knee man I had a dreadful flight....I'm back in the USSR....you don't know how lucky you are boy....back in the U.S.S.R.
And before anyone says that I should know everything about Dusty Springfield (may she RIP) and her music, I can only say that this is the 21st century....we don't worship Dusty....we worship ABBA and Kylie