There's a little corner diner at Ridge and South Park, it's the corner building, Kiddy-corner from the Our Lady of Victory Basillica, which is a beautiful church to visit if you have an interest in architecture... I can't remember the name, but my grandma used to love eating there, I'm afraid I haven't been back to that area in years though. I can't remember if I liked the food, or if it was sentimental attachment.
Overall, Lacawanna is pretty much a dive these days, a far cry from decades past.
There's a Duffs on Orchard Park Road in West Seneca, which depending where you are in Lacawanna might be a quick drive, Could also be on the way back towards the airport, if you take Orchard Park Road (NY-240) to Southwestern (turns into Transit).
My family is also a fan of the Hibachi/Sushi restaurant on Orchard Park road just before the big Southwestern intersection, can't recall the name of the place though.