Bristol and South Gloucestershire schools reopen on Monday
Most schools in Bristol and South Gloucestershire have reopened after more than 220 were closed on Friday.
But Castle Secondary School, Thornbury, was only open to years 10 to 13. Lessons took place at Park Road because of ice at its Gloucester Road campus.
Gritters were out overnight treating main routes but many side roads and pavements remain icy.
Bristol Airport said all flights were operating as normal with the exception of the Paris Charles de Gaulle route.
Passengers were being advised to allow extra time to get to the airport.
The M48 Severn Bridge is open in both directions but with a 40mph speed limit in force.
Bristol City Council said it had more than doubled the capacity on its website after the page containing information about school closures crashed on Friday.
He added that at one point more than 8,500 people a minute were trying to access the page.
The Highways Agency (HA) said the planned closure of the M4 between junction 19 and 20 - and the M5 south to M4 west link road - has been cancelled
"The HA will re-assess weather conditions regarding the remainder of this week's closures," a spokesman said.