Upvote:2
Not the exact answer to your question but note that
definitely accept bank transfer as payment as a matter of course. (It is common for business travel, particularly from certain regions.)
HOWEVER unfortunately they are fussy about the country-pair involved; you'd have to check by phone in each case. (As a general comment, AF is "more loving of bank transfers" so it may be your solution.)
Note that as it happens the best way to get from Prague-SP is:
1st - SWISS (unfortunately they do NOT, I believe, accept bank transfers.)
2nd - AF. (Tragically you have to change in CDG, but that's life. By coincidence this is literally the least time Prag-SP journey.)
3rd - Emirates (a few hours longer), Lufthansa
4th - KLM