Travellers spring into problems with the start of the Easter getaway
Covid-related staffing issues prove problematic, causing cancellations as well as delays on the ground.
Ahead of Easter, travellers setting off on overseas trips have faced chaos, with several flights cancelled and major delays in processing passengers.
Airlines are suffering from staff shortages due to coronavirus with flights being grounded.
Many have planned breaks away, with this Easter school holidays the first Spring break since the UK's covid restrictions for international travellers were dropped.
British Airways cancelled at least 115 flights to-or-from Heathrow Airport on Monday, although the PA news agency understands that only a handful were last-minute cancellations caused by coronavirus-related staff shortages.
The total includes many flights axed due to the airline's recent decision to reduce its schedule until the end of May due to rising coronavirus cases.
The airline said: "Aviation has been one of the industries worst hit by the pandemic, and airlines and airports are experiencing the same issues rebuilding their operations while managing the continuing impact of Covid."
Passengers at Heathrow reported long queues, with among them Scots athlete Kirsty Law.
The 2020 British discus champion said, "The first I knew was when I saw it on social media, so I decided to get here as soon as I could
"Check-in wasn't so bad, because I'd done my documentation in advance, but the security queues were just so long.
"It took about an hour to get through, it wasn't as bad as it could've been, but there are queues everywhere
"For the security, for food, there are queues everywhere, it's not ideal"
EasyJet cancelled 62 flights scheduled for Monday, after axing at least 222 flights across Saturday and Sunday.
Some holidaymakers reported being stuck abroad with no explanation or alternative route home offered by the airline.
A spokesman for the airline said: "As a result of the current high rates of Covid infections across Europe, like all businesses easyJet is experiencing higher than usual levels of employee sickness."
The airline attempted to limit the impact on passengers by focusing cancellations on routes with multiple daily flights.
The spokesman added that the number of cancellations "represents a small proportion" of the total of 1,645 planned for Monday.