CHS to STL flight delays
Charleston, SC (CHS) St. Louis, MO (STL) · 706 miles
159 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
82.28%
Arrived on time
Within 15 minutes of schedule
0.63%
Cancelled
Share of scheduled flights
78 min
When late, late by
Average across delayed arrivals
15 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 78 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Flights from Charleston to St. Louis keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Southwest Airlines arrived on time most often on CHS to STL. Flights ran closest to schedule in September and worst in June.
Every airline on CHS to STL
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 159 | 82.28% | 0.63% | 78 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
STL to CHS St. Louis back to Charleston 81.25% on time BOther routes from Charleston
Common questions
Are flights from Charleston to St. Louis usually delayed?
82.28% of flights on the CHS to STL route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Charleston to St. Louis?
Only Southwest Airlines appears in the published record on this route, with 159 flights and 82.28% arriving on time.
How often are CHS to STL flights cancelled?
0.63% of scheduled flights did not operate — about 6 in every thousand. That is in the normal range.
When CHS to STL flights are late, how late are they?
About 78 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on CHS to STL during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →