EasyJet plans to tackle staff shortages by removing seats on its flights so it can fly with less crew.
The Civil Aviation Authority bases its requirements on the number of crew members needed per flight on the number of passengers flying.
By removing the back row of seats on its A319 planes, the budget airline will be able to fly with three crew members instead of four.
However, this would limit the number of passengers per flight to 150.
In a statement, easyJet told the PA news agency that this was an "effective way" of operating its fleet this summer.
"This summer we will be operating our UK A319 fleet with a maximum of 150 passengers onboard and three crew in line with CAA regulations," the statement said.
"This is an effective way of operating our fleet while building additional resilience and flexibility into our operation this summer where we expect to be back to near 2019 levels of flying."
It comes after European airlines, including easyJet, were forced to cancel thousands of flights in the lead-up to Easter.
The airline expects to operate "near" pre-pandemic levels of flying this summer.
It operated at 80% of 2019 capacity in the first three months of this year.
Last month holidaymakers desperate for some sun flew all the way to Madeira from the UK on an easyJet flight only to be brought straight back again.
The easyJet plane took off from Bristol and headed to the Portuguese archipelago, which it then circled twice before stopping for fuel at another airport.
Not a single passenger got off the plane before it took off again and was flown back to the UK, Bristol Post reported.
When they arrived back in Bristol after an 11-hour flight that got them nowhere, the passengers described ‘chaotic’ scenes as everyone was left waiting for almost three hours before they were told what would happen next.
Those on board the flight ended up being bussed to Gatwick and checked into a hotel as the clock neared midnight.
The passenger were told they would have to get themselves to check-in at 5am to make a second attempt at starting their holidays.
EasyJet apologised for the huge delay and said high winds at Funchal Airport meant the flight was cancelled while the passengers were still on it.
Those on board have now, finally, arrived at Cristiano Ronaldo Airport on the Madeiran island, around 24 hours later than planned.
Some said the best thing about the experience was that the passengers developed ‘great camaraderie' in the face of a deteriorating situation.
