Bristol Airport suspended flights until 8am while the runway was cleared.
Much of the rest of the United Kingdom can also expect freezing temperatures, with a yellow warning for both snow and ice in effect until noon tomorrow.
After Tuesday night's smattering of snow, another weather warning remains in place for snow and ice across the region from 1pm today until 9pm on Friday.
Aer Lingus said it plans to operate a full service to the United Kingdom, however there may be some delays due to weather conditions and passengers should check the status of their flight before travelling to the airport.
This affects Central, Tayside & Fife, East Midlands, East of England, Grampian, Highlands & Eilean Siar, North East England, Northern Ireland, Orkney & Shetland, SW Scotland, Lothian Borders, Wales and Yorkshire & Humber. Hundreds of cars were abandoned.
An "intensive effort" is underway to help the motorists according to Chief Inspector Adrian Leisk, head of roads policing across Devon, Cornwall and Dorset.
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One driver claimed he "could see perfectly well" after his auto, with its side windows completely encased in snow, was stopped in High Wycombe, police added.
School closures can be found on the schools' and county councils' websites.
On the rail network, passengers were urged to check before they travel in case the conditions impact services and some Eurostar services were cancelled on Friday.
The Met Office has said there will be some sunny spells this morning with cloudy conditions moving in by the afternoon.
Had it fallen more than 0.2C (0.4F) lower it would have surpassed the low of minus 15.6C (3.92F) set in 2012.