Tonga is about 1,983 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Tonga is approximately 747 sq km, making Tonga 0.05% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (604,714 fewer people live in Tonga).
Tip: This to-scale comparison of Alaska vs. Tonga uses the Mercator projection, which distorts the size of regions near the poles.