The AIWA HP-CN6 noise-cancelers work fine for me. List price is around $60.00 but you can find them new for between $29 and $49.

They fold up well, use a single AA battery (integrated into the headset, not in a separate box) and they included the adapter for in-flight. I wear glasses and never noticed any extra pressure that ricktoronto reports; maybe it depends on the eyeglass frames. True, they aren't the most comfortable headphones I've ever had, but none of the noise-cancelers have been. For the price, I think they're great.