What is the furthest you have traveled without using a plane on any part of the journey?

[Starlight Serenade 3,499]

I took an Amtrak train from Socal to NorCal, around 500+ miles to visit someone before.

[Envy 6,192]

From NE Oklahoma to Central Connecticut. A distance of nearly 1500 miles. Funny how my move was the longest trip I've ever been in the car. Beats all of my other trips by hundreds of miles.

[Snoopy Fan 1,350]

I believe it was when I traveled to North Carolina by car.

[Astralshy 27,324]

I guess .. around 500 km

[Silly Druid 7,188]

Świnoujście (over 800 km / 500 miles)

I've also been to Slovakia, but that's closer to my home city.