CHICAGO — United Airlines is adding an extra $5 charge for travelers who pay their baggage fee at the airport instead of online.

The move matches a change announced by US Airways last month.
Travelers have generally paid $15 to check their first bag on United and $25 for the second bag. But for tickets bought after Thursday for travel beginning June 10, they’ll $5 more to settle those charges at the airport rather than on United’s Web site.
United says the change will encourage customers to use online check-in. First- and business-class passengers, high-level frequent fliers, and active military personnel don’t have to pay to check their first two bags.
United, a unit of Chicago-based UAL Corp., collected $259 million in add-on fees like baggage charges during the first quarter.