In 2026, whether checked baggage costs extra depends heavily on your airline type and fare class. For "Low-Cost Carriers" (LCCs) like Spirit, Ryanair, or Frontier, checked bags almost always incur a fee, which is significantly cheaper if paid during the online booking process rather than at the airport counter. For "Full-Service" airlines like Delta, United, or British Airways, the first checked bag is often included in the ticket price for international long-haul routes or for those who have reached "Elite" status in a loyalty program. However, many of these same major airlines have introduced "Basic Economy" fares for domestic and short-haul flights that exclude checked bags entirely to compete with budget rivals. In 2026, it is common for a standard domestic checked bag to cost between $35 and $60 per flight. To avoid these costs, many savvy travelers have switched to "one-bag" travel using maximum-sized carry-ons, or they utilize co-branded airline credit cards which often waive the checked bag fee for the cardholder and their companions.