Tui warned this morning that it was still suffering delays due to aircraft and crew availability across some regional airports in the wake of winter storm disruption.
A flight from Gran Canaria to Cardiff due to depart on Saturday night will not take off until this evening with the operator providing hotel accommodation and food to delayed returning holidaymakers.
A Malaga to Cardiff flight originally due to leave at midday on Sunday was put back until 4.24am this morning.
And a Cardiff to Malaga flight due to depart at 7.10am yesterday was delayed until midnight.
A Luton to Lanzarote flight due to go at 8.25am on Sunday was put back by more than 24 hours as well as an inbound service from Lanzarote.
A Crystal ski flight from Sofia to Birmingham due to depart yesterday evening was delayed by more than 24 hours until 9.13pm tonight with holidaymakers given accommodation and meals.
Tui said: “Please be aware that due to adverse weather conditions across some regional airports, over a number of days, we are experiencing delays due to aircraft and crew availability.
“We are doing everything we can to minimise the disruption and thank you in advance for your understanding.
“We continue to keep a really close eye on the weather forecast, airport updates and our flying programme over the next few days.
“We will share any details and information on any other changes to our flights on our website or by contacting affected customers directly, including any cruise customers.”
Ryanair returned to full operations at all UK airports yesterday following days of winter storm disruption.
The Irish low-fares airline said most customers affected by the severe weather have received a full refund or free transfer to an alternative flight.
“We are doing everything we can to re-accommodate customers affected by the severe weather this week and we apologise for any inconvenience caused by these disruptions which are entirely outside of our control,” the carrier said.
Aer Lingus also plans to operate a full schedule today from Dublin, Cork, Shannon, Belfast and Knock and is laying on addition flights to the Irish capital from Alicante, Faro and Lanzarote.
British Airways planned to run a normal schedule over the weekend but admitted the risk of poor weather at some airports could result in “minor” schedule changes.
Jet2.com was having to revise its flights at Birmingham airport on Saturday due to continuing adverse weather.
Around 84% of flights using Edinburgh airport were due to operate on Saturday, with 34 out of 215 services cancelled.
Glasgow airport ran 95% of its schedule on Saturday while Heathrow had returned to a near full schedule of flights.
Bristol airport re-opened on Saturday but warned of on going flight disruption.