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People complain about feeling lost when booking a flight because of hidden costs and unclear price structures. Sometimes they do not understand why paying for one option means getting a different one for free, even if the latter is not interesting for them. This leads us to a major criticism of airlines: that they have created a bundle of services and options in order to apparently give the customer more flexibility, but that what this means in practice is that once several options are actually booked, a flight becomes more expensive than the highly visible price shown on the home page of airline websites.
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