Travel misery has returned for UK air passengers as volcanic ash from Iceland grounded flights to Spain, France and Portugal and the risk loomed of more disruption on Sunday.
An ash cloud forced 19 Spanish airports to close and they were expected to remain shut until early on Sunday.
Ryanair said airspace over southern France could also be restricted and the airline was expecting to have to cancel flights until midnight.
London Stansted Airport saw the cancellation of 25 Ryanair services to destinations including the Canary Islands, Spain and Portugal, along with five easyJet flights.
At Gatwick, six easyJet services were grounded while another four Ryanair flights to Alicante, Madrid and Barcelona were cancelled.
Ryanair placed details of cancelled flights on its website, including services from East Midlands, Birmingham, Bristol, Leeds and Liverpool.
It advised customers to check their flight status before travelling to the airport.
Another, higher level ash cloud gathered over the Atlantic, causing westbound flights to re-route to avoid it.
A spokesman for Heathrow Airport said transatlantic services were suffering delays of 10 to 15 minutes to allow time to fly around the ash cloud.
He said disruption to European services was minimal, with only a small number of flights going to La Coruna affected. The disruption could continue into next week if northerly winds bring ash over western Scotland and Ireland.
