Paying for extras has become routine for airline passengers but it doesn't mean they like it, with a poll showing more than half all travellers hate having to fork out to choose their seat.
The online poll of nearly 2,000 people by website Airfarwatchdog.com, asked respondents which airline fees they despised the most.
Paying for the privilege of picking their seat was the biggest bugbear for 52 per cent of respondents, followed by paying to change flights - something which irked a third of passengers.
A minority, or 14 per cent, said they didn't like paying extra for snacks while just three per cent said they were happy to pay for any extra services.
George Hobica, president of Airfarewatchdog.com, said airlines were annoying passengers by adding to what many people consider the already high cost of air travel.
"There are certain airline services that really do involve added expense," he said.
"These include meals (for obvious reasons), transporting and checking bags (fuel and labour), and even to a certain degree changing your date of travel."
"But assigning a seat, which can be done online for virtually no transaction cost to the airline? It's simply a way to generate revenue and not to cover a tangible expense. I think passengers realise this and that's why they're so annoyed by it."
Hard hit by the financial crisis, many airlines across the globe, and especially in the US, have started charging passengers for services that used to be free: check-in baggage, drinks and snacks, for example.
While this is the norm - and in a way expected - on budget airlines, travellers have expressed dismay at the fees levied by big carriers as they try and offset losses caused by the drop in travel caused by the global economic downturn.
According to Rick Seaney, chief executive officer of online ticketing website Farecompare.com, there are than a dozen different fees that airlines add onto the basic ticket price, including fees for ticket rescheduling, oversize bags and meals.
One of the more controversial charges, put in place by Southwest Airlines and United Airlines in the US following passenger complaints, involves asking overweight passengers to buy a second seat, which can be refunded if the plane is not full.
Several major US carriers, including American Airlines and Continental Airlines, have said they would continue to explore new fees and cost-cutting measures to enhance profitability while demand for air travel among business customers picks up.