Some Midlands rail services have been hit by the weather, but Birmingham Airport said the vast majority of flights were operating to schedule.
London Midland said it was running special timetables on Redditch to Lichfield Cross City trains and on all its services in and out of Snow Hill.
Chiltern Railways said a reduced service would run on most routes, particularly at peak times.
Part of Prince Charles's visit to Birmingham was cancelled due to snow.
No direct services
London Midland said its Hereford-Worcester-Bromsgrove-Birmingham New Street service would not run via Bromsgrove on Wednesday.
The firm added that all Cross Country Cardiff to Birmingham trains would instead call at Bromsgrove in both directions.
Chiltern Railways said trains to and from Birmingham and stations in Warwickshire would only run every hour.
The firm said no direct services would go between Birmingham Snow Hill and Kidderminster, so passengers were advised to use connecting London Midland trains, changing at Birmingham Moor Street.
Virgin Trains said London Euston to Manchester Piccadilly/Birmingham New Street services were affected, including the cancellation of trains departing from Birmingham New Street at 50 minutes past the hour.
Birmingham Airport said people should check its website.
Prince Charles had been due to go to the Frankfurt Christmas Market and unveil the newly restored Edward VII statue in Centenary Square.
But, with overnight snow and more expected on Wednesday, the decision was taken to postpone the visit, the city council said.
A Clarence House spokesman said the engagements were cancelled because other participants could not attend and the prince did visit injured service personnel at the Royal Centre for Defence Medicine at Birmingham's Queen Elizabeth Hospital at lunchtime.
Meanwhile, Dudley Council appealed to drivers with a 4x4 vehicle to volunteer to help the borough's home carers.
It said home carers were managing to reach people on foot or from main roads, but with more snow on the way it was likely to make some areas even more difficult to access.