I've been grinding all of my stuff for the end of season 7 to get everything I wanted. And then played a crap ton of matches for season 8! That's why I've been gone lately. 

But anyway, on to the tip!

Since planes have been vaulted, there's no other transportation vehicle that can travel as significantly fast and far as they can...

Or is there?

With the quad crasher, you can. All you have to do is get a quad crasher, then place a ramp or two or more to your liking. Drive up the ramp(s) and as soon as you reach the edge, boost straight up into the sky. Once the boost is finished, angle your car downwards a little. Boost upwards, and then straighten your car again.  If you do this successfully, you'll fly across the map with ease.

Here's what it looks like: 

https://youtu.be/Ctq1i3p2DhQ