| Code | Year/Month | Avg. Delay |
|---|---|---|
| ORD | 2003/6 | 67.8 min |
| ORD | 2003/7 | 78.3 min |
| ORD | 2003/8 | 76.1 min |
| ORD | 2003/9 | 63.2 min |
| ORD | 2003/10 | 64.3 min |
| ORD | 2003/11 | 68.7 min |
| ORD | 2003/12 | 65.9 min |
| ORD | 2004/1 | 73.4 min |
| ORD | 2004/2 | 68 min |
| ORD | 2004/3 | 84.1 min |
| ORD | 2004/4 | 63.8 min |
| ORD | 2004/5 | 85.2 min |
| ORD | 2004/6 | 73.6 min |
| ORD | 2004/7 | 71.5 min |
| ORD | 2004/8 | 72.1 min |
| ORD | 2004/9 | 63.9 min |
| ORD | 2004/10 | 58.4 min |
| ORD | 2004/11 | 71.7 min |
| ORD | 2004/12 | 63.8 min |
| ORD | 2005/1 | 74.1 min |
| ORD | 2005/2 | 63.1 min |
| ORD | 2005/3 | 63.6 min |
| ORD | 2005/4 | 62.2 min |
| ORD | 2005/5 | 66.8 min |
| ORD | 2005/6 | 67.3 min |
| ORD | 2005/7 | 74.3 min |
| ORD | 2005/8 | 60.1 min |
| ORD | 2005/9 | 63.9 min |
| ORD | 2005/10 | 56.4 min |
| ORD | 2005/11 | 62.8 min |
| ORD | 2005/12 | 61.1 min |
| ORD | 2006/1 | 61.3 min |
| ORD | 2006/2 | 62.3 min |
| ORD | 2006/3 | 64.7 min |
| ORD | 2006/4 | 65.9 min |
| ORD | 2006/5 | 68.5 min |
| ORD | 2006/6 | 66.4 min |
| ORD | 2006/7 | 70.8 min |
| ORD | 2006/8 | 70.8 min |
| ORD | 2006/9 | 69.1 min |
| ORD | 2006/10 | 70.2 min |
| ORD | 2006/11 | 68.3 min |
| ORD | 2006/12 | 65.5 min |
| ORD | 2007/1 | 62.7 min |
| ORD | 2007/2 | 67 min |
| ORD | 2007/3 | 68.5 min |
| ORD | 2007/4 | 65.6 min |
| ORD | 2007/5 | 63.6 min |
| ORD | 2007/6 | 68.8 min |
| ORD | 2007/7 | 68.9 min |
| ORD | 2007/8 | 69.6 min |
| ORD | 2007/9 | 64.6 min |
| ORD | 2007/10 | 59.7 min |
| ORD | 2007/11 | 60.3 min |
| ORD | 2007/12 | 73.9 min |
| ORD | 2008/1 | 79.1 min |
| ORD | 2008/2 | 82.7 min |
| ORD | 2008/3 | 73.6 min |
| ORD | 2008/4 | 72 min |
| ORD | 2008/5 | 70.3 min |
| ORD | 2008/6 | 76.5 min |
| ORD | 2008/7 | 73.5 min |
| ORD | 2008/8 | 73.3 min |
| ORD | 2008/9 | 74.7 min |
| ORD | 2008/10 | 69.9 min |
| ORD | 2008/11 | 73.4 min |
| ORD | 2008/12 | 82.7 min |
| ORD | 2009/1 | 75.9 min |
| ORD | 2009/2 | 77.7 min |
| ORD | 2009/3 | 79.4 min |
| ORD | 2009/4 | 71.5 min |
| ORD | 2009/5 | 67.8 min |
| ORD | 2009/6 | 75.4 min |
| ORD | 2009/7 | 74.2 min |
| ORD | 2009/8 | 70.4 min |
| ORD | 2009/9 | 70.2 min |
| ORD | 2009/10 | 70.4 min |
| ORD | 2009/11 | 67.9 min |
| ORD | 2009/12 | 80.9 min |
| ORD | 2010/1 | 71.6 min |
| ORD | 2010/2 | 80.6 min |
| ORD | 2010/3 | 76.9 min |
| ORD | 2010/4 | 71.5 min |
| ORD | 2010/5 | 75.4 min |
| ORD | 2010/6 | 76.1 min |
| ORD | 2010/7 | 74.1 min |
| ORD | 2010/8 | 79.3 min |
| ORD | 2010/9 | 72.2 min |
| ORD | 2010/10 | 69.8 min |
| ORD | 2010/11 | 69 min |
| ORD | 2010/12 | 81.9 min |
| ORD | 2011/1 | 78.8 min |
| ORD | 2011/2 | 85.5 min |
| ORD | 2011/3 | 83.1 min |
| ORD | 2011/4 | 84 min |
| ORD | 2011/5 | 91.2 min |
| ORD | 2011/6 | 80.6 min |
| ORD | 2011/7 | 77.2 min |
| ORD | 2011/8 | 80.7 min |
| ORD | 2011/9 | 77.5 min |
| ORD | 2011/10 | 74.2 min |
| ORD | 2011/11 | 85.2 min |
| ORD | 2011/12 | 76.9 min |
| ORD | 2012/1 | 81.7 min |
| ORD | 2012/2 | 88.3 min |
| ORD | 2012/3 | 83.7 min |
| ORD | 2012/4 | 79.5 min |
| ORD | 2012/5 | 86.5 min |
| ORD | 2012/6 | 88.7 min |
| ORD | 2012/7 | 84.3 min |
| ORD | 2012/8 | 80.4 min |
| ORD | 2012/9 | 75.6 min |
| ORD | 2012/10 | 84.8 min |
| ORD | 2012/11 | 84.9 min |
| ORD | 2012/12 | 90.9 min |
| ORD | 2013/1 | 91.8 min |
| ORD | 2013/2 | 88.5 min |
| ORD | 2013/3 | 78.3 min |
| ORD | 2013/4 | 103.1 min |
| ORD | 2013/5 | 83.7 min |
| ORD | 2013/6 | 92.9 min |
| ORD | 2013/7 | 75.7 min |
| ORD | 2013/8 | 70.6 min |
| ORD | 2013/9 | 76.2 min |
| ORD | 2013/10 | 71.2 min |
| ORD | 2013/11 | 75 min |
| ORD | 2013/12 | 78 min |
| ORD | 2014/1 | 88.3 min |
| ORD | 2014/2 | 80.9 min |
| ORD | 2014/3 | 69.7 min |
| ORD | 2014/4 | 79.9 min |
| ORD | 2014/5 | 74.7 min |
| ORD | 2014/6 | 78.7 min |
| ORD | 2014/7 | 72.2 min |
| ORD | 2014/8 | 74.1 min |
| ORD | 2014/9 | 74.4 min |
| ORD | 2014/10 | 78.4 min |
| ORD | 2014/11 | 71.1 min |
| ORD | 2014/12 | 65.8 min |
| ORD | 2015/1 | 76.6 min |
| ORD | 2015/2 | 79.8 min |
| ORD | 2015/3 | 71.7 min |
| ORD | 2015/4 | 75.8 min |
| ORD | 2015/5 | 76.3 min |
| ORD | 2015/6 | 79.3 min |
| ORD | 2015/7 | 71.3 min |
| ORD | 2015/8 | 76.5 min |
| ORD | 2015/9 | 72.4 min |
| ORD | 2015/10 | 84 min |
| ORD | 2015/11 | 86.3 min |
| ORD | 2015/12 | 87.7 min |
| ORD | 2016/1 | 77.1 min |