Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

SKYWEST · FLIGHT OO 5539 SCHEDULED · TYPICAL SCHEDULE

Saturday, October 3 Today

OO 5539 · ORD → MLI

departs 10:00 PM CT · arrives 11:16 PM CT

Forecast issued Sat 7:00 PM ET · 4h before departure

OO 5539 isn’t flying ORD → MLI today

This listing came from a typical schedule. According to the FAA, OO 5539 flies these legs today:

UNV → ORD · 6:08 PM · scheduled
UNV → ORD · 6:08 PM · landed