How to spot the ISS from Chicago
Chicago sits at 41.85°, -87.65°. The brightest passes typically appear within 1–2 hours of sunset and again before sunrise, when the satellite is sunlit while the sky above Chicago is dark. Look for a steady, fast-moving point of light brighter than most stars — the ISS rivals Venus at peak.
The table above lists every pass tonight reaching at least 10° elevation. Get away from direct streetlights for the best view; binoculars help but none of these passes require a telescope.