The baggage allowance for United Airlines international flights in 2026 depends heavily on your ticket class and destination. For Basic Economy, checked bags generally carry a significant fee (often $75+ for the first bag), and a full-sized carry-on is only permitted on certain transpacific/transatlantic routes. For Economy (Standard), many international routes to Europe, Asia, and South America include one free checked bag (up to 23kg/50lbs), while others may charge for the first bag. Passengers in United Premium Plus, United Business, or United Polaris typically receive two free checked bags (up to 32kg/70lbs each). If you hold Premier Silver status or above, you usually receive at least one or two extra free bags. Because these rules can change based on the specific "fare brand" and the date of ticket issuance, United strongly recommends using the "Baggage Calculator" on their website or app, which provides a definitive allowance based on your specific confirmation number and elite status level.