Sun Country AirlinesSY
Flights SY8778 12:00 Fr
live
Direct flights from St Louis (STL) to Cahokia/St Louis (CPS): 1 nonstop departure observed each week across 1 airline. The median arrival is on schedule. No cancellations were recorded across the 1 tracked flight. The nonstop covers 27 km, an estimated 32 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Cahokia/St Louis. Updated 9 September 2026 at 04:16 UTC.
STL
St Louis
heavy · +33
CPS
Cahokia/St Louis
tracking
27 km · ~0h 32m est.
Under pressure · 1 airline · 1x weekly · nonstop
56 / 100
route health from live STL and CPS delay boards
Median arrival delay is +1 min. 0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+1 minacross the last 1 operated legs
Flight time~0h 32mestimated from route distance
Weekly departures1x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sun Country Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomes09-08BKN21departed+1
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the St Louis to Cahokia/St Louis route actually runs
Pro Flight Search records official board updates for nonstop STL to CPS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — St Louis (STL) to Cahokia/St Louis (CPS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STL-CPS
STL to CPS questions
Is STL–CPS running on time right now?
Some delays possible. The departure side at STL is the weaker end, route health score 56/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from STL to CPS?
Great-circle distance is 27 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 32–32 min gate-to-gate on this route.
How often does STL–CPS fly?
Sun Country Airlines runs the route with about 1 flight a week (fri). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at STL and arrival-side delay at CPS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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