I like OnAir too. I wish there were an option to find flights that go in a general direction (ie I’m trying to move east across the US) but it adds a nice game element to the sim. It’s also super professionally produced and nicely put together.
I do wish there was a warning if you took off without cargo (have done that and got half way there!) but I guess that’s kind of realistic. If you’re a pilot who doesn’t check whether you’ve got your cargo on board before taking off you probably deserve to have to fly back!