Great but...
That was great indeed. A bit emotional, but that's ok.
However, even tho the animation and story were good, some parts just didn't fit.
Here's a list of awkward stuff :
There was no TV in Nebraska in 1943. Check Wikipedia.
The father seems like he's from the 90s with his colorful tie and his modern appearance. What's up with that. He's totally out of place. Also, he looks like a businessman. He should be like "It's war! We're in trouble.". But no, he's just crafting a plane for his son, even tho he definitly doesn't look like a plane crafter. The plane itself flies particularly well too, dashing thru miles of skies. I guess the father was real good in physics. Then again, it was probably a stylistic choice made by the author, rather than a realistic one.
The little boy was lucky to have one of the few female aviators of the time as a mother. But that's not impossible. So I guess I can't say much about this. However, I don't really understand why his mother's plane is so huge, and how she can find time to bring her son in one of her flight in the middle of WWII.
Ok, so animation was good, voice acting was decent, but it just felt unrealistic to me.