Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 5403SCHEDULED · TYPICAL ODDS
OO 5403 · ORD → GSP
departs 1:55 PM CT · arrives 5:00 PM ET
Forecast issued Tue 6:00 PM ET · 93h before departure
Typical odds
Too early for a weather forecast — these are typical odds for this flight on a Saturday in October, from the weather this date has had in past years (the range shows how much they varied). They’ll switch to forecast-based odds about 3 days before departure.
Odds over time
Arrive at GSP more than 15 minutes late?
19%chance · ±5 pts+0 pts · 24h
HOW SURE WE ARELow. This is mostly a starting point from history; weather forecasts haven't kicked in yet.
How late will it get to GSP?
On time or early
80%
15–30 min late
3%
30 min–1 hour late
5%
1–2 hours late
7%
Over 2 hours late
4%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.