Originally Posted by
barneyg_
Yes, techically it is illegal. The ROC considers Ercan an illegal airport. Additionally, if you flew into Ercan, crossed into the ROC, and then tried to fly out of LCA, you would have a problem because there would be no record of your entry into the ROC. Your passport is not stamped when you cross the green line. And there would be no record of you ever leaving the TRNC. It's a bit tricky.
If you did fly into the TRNC and then cross to the ROC with plans to leave via Ercan but had sone kind of problem in the ROC, you'd have no stamp in your passport indicating you entered the ROC legally and could have issues with the authorities because you would be viewed as entering the country illegally.