Airline Baggage Rules

Airline baggage policies are the most confusing part of travel planning, and understanding them before you book is essential. Every airline has different rules for carry-on size, personal item allowance, and baggage fees. What’s allowed on Ryanair might get you charged on Spirit Airlines. What fits in the overhead bin on one airline might be too large for another. These inconsistencies create confusion, stress, and unexpected fees at the airport.

The financial impact is significant. Airline baggage fees generate billions in revenue annually. In 2025, the average checked baggage fee was $30-$35 per bag, and overweight fees ranged from $50-$150. For a family of four taking a week-long vacation, unexpected baggage fees can add $200-$400 to your total travel cost. For frequent business travelers, these fees accumulate quickly, potentially costing thousands annually.

Beyond cost, understanding baggage rules directly affects how you pack and travel. Knowing your airline’s carry-on size limit (typically 22 x 14 x 9 inches for most carriers) helps you choose appropriate luggage. Knowing personal item policies (usually 18 x 14 x 8 inches) determines whether you can bring a backpack or underseat bag. Budget airlines enforce baggage policies more strictly than full-service carriers. Spirit Airlines, for example, charges $35-$50 for carry-on bags that don’t fit their strict 18 x 14 x 8 inch personal item limit. Ryanair charges €10-€20 for oversized carry-ons.

International flights have different baggage allowances than domestic flights. Transatlantic flights typically allow 2 checked bags plus a carry-on, while European budget airlines often include only a personal item in the base fare. Understanding these differences prevents costly surprises and allows you to plan strategically.

This comprehensive guide covers baggage policies for 50+ airlines, from budget carriers like Spirit and Ryanair to full-service airlines like American and United. Whether you’re flying domestically or internationally, budget or premium, we explain exactly what you can bring, how much it costs, and how to avoid overage fees. We update this guide regularly as airline policies change, ensuring you always have current information.

The key to stress-free travel is knowing your airline’s specific baggage policy before you arrive at the airport. Our detailed guides provide that information organized by carrier, flight type, and travel scenario. Explore our collection of airline-specific guides, comparison charts, and packing strategies to master baggage policies and travel with confidence.