Thanks for your reply, craigthemif! I was thinking of flying business ORD-MAD - it's at 16.20, but I think we could still be able to fall asleep for a couple of hours. There is no chance for sleeping on the flight coming back so I think I'll find the Blue Class awards. Is there a difference in seats offered in Blue Class? All info I could find suggests that there is difference in fees for changes in Blue Class vs no fees in Economy but it looks like the seats themselves are the same. Is this correct?