STL to CHS flight delays & on-time performance
Nonstop flights from St. Louis Lambert International Airport to Charleston International Airport · 706 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STL or CHS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from St. Louis (STL) to Charleston (CHS) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0% were cancelled, and 4% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 12pm did best (91% on time); around 2pm did worst (72%).
- Tuesday was the most reliable day to fly (100% on time) and Thursday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (68%).
Which airline is most on time from STL to CHS?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 79% | 0.0% | 11 min | 3.8% | 160 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am87%31 flights
- 11am40%10 flights
- 12pm91%22 flights
- 2pm72%58 flights
- 3pm88%16 flights
- 5pm86%14 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday84%0.0% cancelled
- Tuesday100%0.0% cancelled
- Wednesday88%0.0% cancelled
- Thursday64%0.0% cancelled
- Friday73%0.0% cancelled
- Saturday86%0.0% cancelled
- Sunday71%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft68%
- Air traffic control & airport congestion19%
- Airline (crew, maintenance, cleaning, fueling)13%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
No cancellation causes recorded in this period.
STL to CHS: common questions
- How often are STL to CHS flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from St. Louis to Charleston cancelled?
- 0.0% of scheduled flights were cancelled (0 of 160).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 47 min behind schedule on average, and 3.8% of flights were an hour or more late.
- How long is taxi time at STL?
- Flights on this route spent 10 min taxiing from the gate to takeoff on average.
Related routes
Return trip: CHS to STL — 80% on time
More flights from St. Louis
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STL → CHS, nonstop flights by US airlines that report to the DOT. How we calculate this.