How far does walkie talkie tansmit

Walkie-Talkie is a FaceTime audio connection. So there is not distance limit as long as both Apple Watches can access the Internet (which may involve their iPhone providing the Internet access).

I have personally used it 300 miles away between my Sister's house and my Wife at home, and I've also used it with my Wife between Massachusetts and Houston, Texas (approx 1,600 miles away).

Very roughly 12,500 miles if you can find anyone there to talk to, which is about as far away as you can get while remaining on Planet Earth. In fact it might be a little further because that’s a straight line distance and internet connections tend to bounce between major cities so they don’t always follow the shortest route.

How far is furtherest contact you have? It not like the old days walkie talkie. It uses your phone to call

https://support.apple.com/en-gb/HT208917

If a geosynchronous communications satellite is involved, add an extra 45,000 miles to the distance 😄