The best replacement for nonstop is non-stop.

The best alternatives to nonstop are rated as following:
★★★★★  non-stop
★★★★  direct flight
★★  glitch
★  marquese

Your alternative for nonstop is not listed? Suggest!
Speaking about nonstop, one probably shouldn't forget about sunflower.

Other search terms related to nonstop and their ratings are:
★★★★★ sunflower
You have in mind a companion for nonstop and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nonstop in all years. Click on graph for more.
nonstop
non-stop
direct flight