The trust with the longest delays was University Hospitals Plymouth, with an average handover time of three hours and 33 minutes over the week - two hours and 40 minutes longer than the average for England.
Hospitals struggle every winter with additional pressures due to the impact of cold weather, but the early arrival of flu this season and high volume of cases meant Christmas and New Year's weeks were even busier than usual.
The latest NHS winter situation reports give a more detailed look at the level of pressure experienced by individual trusts, including those with the worst ambulance handover delays and highest levels of flu patients.
It also recorded the longest average handover times for a single day, at five hours and 14 minutes on New Year's Day.
There are currently at least 20 hospitals that have declared critical incidents in England, although this is a fast-moving picture, and some trusts will go into critical incident for as little as half an hour.
