Different flights offer varying baggage allowances. Many cheap flights like charging for baggage in a bid boost their revenue, and when your luggage is sizeable, you can end up paying nearly as much as the ticket itself. While some airlines allow you to check the exact baggage allowance for your fare type, this isn’t always the case.
About a month ago, I took an Emirates flight from London to Johannesburg, and I have to say I was impressed by their baggage allowance. I was able to squeeze in my 20kg rucksack on an Economy Class without a fuss. The airline has some great baggage policies with luggage allowances of up to 50kg.
Always take note of your baggage allowance beforehand and whether your luggage will be transferred for you if you have connecting flights.