Find Cheap Czech Airlines Flights & Discounts

Yes... one item. We were able to do online check in, but was a challenge to determine flight number, because Czech air used Air France for the flight. So when we tried to use Czech airlines and the flight number it rejected. We called they told us to book in via Air France, we then did that and again the flight number rejected. We had to go to Air France info on departing flights find out what that flight number was. Then voila it accepted and we were able to check in. Perhaps to add a note to instructions that you may need to look up partner airline flight number if booking airline flight number rejects