Loganair said a number of flights from Scotland’s islands had been affected.
The 08:40 Shetland to Aberdeen service is understood to have landed at Glasgow after being diverted via Inverness.
An Loganair spokesperson said: “We are actively doing all we can to ensure those customers on affected flights are rebooked onto alternative flights. We thank our customers for their patience and understanding.”
The yellow weather warning covers almost all of Scotland and other parts of the UK.
Scotland has experienced heavy rain and blizzard conditions, with wind speeds reaching 86mph at Inverbervie in Aberdeenshire.
Met Office meteorologist, Simon Partridge, said: “We have rain warnings out for the whole of Northern Ireland, western Wales, north-west England, and then there’s a combined sort of rain and snow warning for Scotland.”
The Met Office said 20 to 45mm of rain was expected in 24 hours.