The Department of Homeland Security U.S. Immigration and Customs Enforcement (ICE) repatriates thousands of aliens every year. In this review, we sought to identify barriers to the repatriation of detained aliens with final orders of removal. Our case review of 3,053 aliens not removed within the prescribed 90-day timeframe revealed that the most significant factors delaying or preventing repatriation are external and beyond ICE’s control. The two predominant factors delaying repatriation are legal appeals and obtaining travel documents. Internally, ICE’s challenges with staffing and technology also diminish the efficiency of the removal process.