The migration of a hummingbird can be quite lengthy. The exact length of this journey will depend on which specific species of hummingbird to which you are referring. The Rufous Hummingbird is the hummingbird with the longest migratory journey, a whopping 3000 miles in length from Alaska to Mexico. The Ruby-throated Hummingbird’s journey is 500 miles non-stop each way across the Gulf of Mexico. Isn’t it amazing how birds so small can make and survive a journey of such length?