I've traveled to 17 countries and have learned that a checked bag is always worth it. Here's why.

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• After visiting 17 countries, I will always swear by checking a bag during my travel experiences.
• Forgoing a carry-on and checking a bag means I don't have to compete for overhead bin space.
• When traveling with a large checked bag, I get to pack everything I want to bring on my trip.

I consider myself fairly frugal when it comes to travel. I've booked the 6 a.m. flight...