By SAM KEMMIS of NerdWallet
Pandemic rebooking issues drove many air passengers to book directly with airlines instead of third-party travel sites. While ancillary fees have become a major part of airline revenue over the past 15 years, airlines have more recently ramped up efforts to drive revenue from add-on fees. Customers could end up paying more when booking directly with airlines because of the aggressive push toward extra upgrades, combined with seat selection and baggage fees. Online travel agencies such as Expedia and Kayak may help travelers save money because they offer better comparison shopping, which helps travelers choose the lowest overall cost, not just the lowest base cost.