| Mission | Date/Time | Event |
| marsodyssey | 2001.04.07.15.02.22 | Launch from Cape Canaveral on a Delta II rocket |
| marsodyssey | 2001.04.07.15.55.00 | First spacecraft signal recevied after successful separation |
| marsodyssey | 2001.10.24.02.26.00 | 19.7 minute Mars orbit insertion burn |
| marsodyssey | 2002.01.11.12.00.00 | End of aerobraking phase, 201 x 500 km orbit achieved |
| marsodyssey | 2002.01.30.12.00.00 | Final 400 x 400 km orbit (2 hour period) achieved |
| marsodyssey | 2002.02.19.12.00.00 | Begin science mapping |
| marsodyssey | 2002.12.01.12.00.00 | Odyssey scans predict large quantities of water. To be investigated by the Phoenix mission |
| marsodyssey | 2004.07.01.12.00.00 | End of primary mission |
| marsodyssey | 2006.09.01.12.00.00 | End of first mission extension |
| marsodyssey | 2008.09.01.12.00.00 | End of second mission extension |
| marsodyssey | 2010.09.01.12.00.00 | End of third mission extension |
| marsodyssey | 2015.01.01.12.00.00 | Predicted fuel exhaustion |