Delta along with Croatia and Italy have objected to a planned codeshare by US carrier jetBlue on Air Serbia flights between Belgrade and these two European countries. In a filing to the US Department of Transportation (DOT), Delta, Croatia and Italy have argued that the European Common Aviation Area (ECAA) agreement does not allow such codesharing. jetBlue has responded, indicating that Delta, along with many other US and EU airlines, successfully codeshare in Serbia and similar ECAA countries. It has now requested for the DOT to delay a decision on the approval of a planned codeshare agreement between Delta and SAS Scandinavian Airlines on intra-European flights between SAS hubs and Croatia, Italy, Bosnia and Herzegovina, Montenegro, and Albania, until it deals with Delta’s objections. The Delta objection is unrelated to a wide-ranging codeshare agreement Air Serbia has in place with jetBlue on routes within North America, with no complaint filed against the codeshare when it was approved last summer. It has since been in use. Recently, jetBlue began codesharing on a number of Air Serbia operated flights within Europe. US carriers often engage in objecting to codeshare agreements. In 2014, Delta objected to Air Serbia’s planned codeshare on Etihad Airways flights between Abu Dhabi and the United States.