United Airlines is raising one-bag fee to$30

United Airlines is raising checked-bag fees for many passengers, matching a move earlier this week by JetBlue Airways. United raised fees for checking a first bag from $25 to $30 and a second bag from $35 to $40 for tickets issued on or after Friday. The fees cover flights in North and Central America and the Caribbean. Chicago-based United says the money helps it invest in “the overall customer experience.” At midday Friday, American and Delta still showed $25 and $35 bag fees on their websites. Airlines have steadily increased revenue from extra charges on things like baggage, ticket changes, nicer seats and early boarding. Last year, U.S. airlines raised $7.4 billion from ancillary fees.