My surgeon describe's "Sliders" as things that "slide" down the band. Greasy foods, ice cream, mac and cheese, candy bars, heavy surger foods.
When I just get a fill I tend to lean on sliders as I am afraid to eat solid's due to getting stuck. Slider's are generally NOT good for you.
I fly internationally, my husband is british and we travel quite often to see his family. I have found that in-flight my band is quite tight and I am not hungy. I just try and drink lots of fluids in flight. Once I land, I don't seem to have any trouble with the band itself. Good luck to you!