Free baggage is the checked baggage already included in your ticket. In other words, it’s the weight the airline allows you to bring at no extra cost.
Extra baggage refers to any additional checked baggage that can be purchased from the airline.
Not all tickets include free checked baggage. It depends on your airline, flight route, and ticket type. Some low-cost airlines don’t include any checked baggage in their base fares.
Airlines that typically don’t include free checked baggage:
You can check your free baggage allowance while booking your flight or after your e-ticket is issued. Please refer to this article: How to check my baggage allowanceWhat should I do if my ticket doesn’t include free checked baggage?
You can buy extra baggage during booking or after e-ticket is issued. Find the step-by-step instruction in this article: How to purchase extra baggage
Alternatively, you can buy the extra baggage upon online check-in, or by contacting the airline call center directly. You can also do so when checking in at the airline check-in counter at the airport.