69% of flights from Charleston to Denver arrived on time over the past 12 months. That is worse than the typical U.S. route. Most reliable airline: United Airlines (74%). 11% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for CHS → DEN: when a flight was late, it was under 45 minutes late 53% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 55 three hours or more; 0.6% were cancelled outright.
- On time or early69%
- 15–30 min late12%
- 30–60 min late8.1%
- 1–2 hours late6.5%
- 2–3 hours late1.5%
- 3+ hours late1.8%
- Diverted0.8%
- Cancelled0.6%
Share of all 663 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| United Airlines | 451 | 74% | 0.7% | −4 min | 8.6% | +71 min | United Airlines |
| Southwest Airlines | 212 | 58% | 0.5% | +7 min | 12.3% | +52 min | Southwest Airlines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at CHS). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | United Airlines |
|---|---|
| 4 p.m. | 70% |
By month
Each calendar month pooled over 2023–2026. Best: November (83%). Worst: June (58%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 103 | 75% | 0.0% |
| Tuesday | 87 | — | — |
| Wednesday | 85 | — | — |
| Thursday | 98 | — | — |
| Friday | 103 | 74% | 1.0% |
| Saturday | 83 | — | — |
| Sunday | 104 | 62% | 1.0% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 3 · airline 1
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| UA 557 | 4:00 p.m. | 310 | 72% | 0.7% | −1 min | United Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Aug 16, 2026 | 3 | 33% | 0 |
| Aug 21, 2026 | 3 | 33% | 0 |
| Aug 17, 2026 | 3 | 33% | 0 |
| Aug 14, 2026 | 3 | 33% | 0 |
| Aug 13, 2026 | 3 | 33% | 0 |
Questions
How often are flights from CHS to DEN on time?
69% of 663 scheduled flights from Charleston, SC to Denver, CO arrived within 15 minutes of schedule between September 2025 and August 2026. 0.6% were cancelled.
Which airline is most on time from CHS to DEN?
United Airlines: 74% of its 451 flights on the route arrived on time. Southwest Airlines: 58%.
What month has the most delays from CHS to DEN?
June (58% on time). The best month is November (83%), over 2023–2026.
Related
- DEN → CHS (return)
- Charleston (CHS) delays by hour
- Flights into Denver (DEN)
- United Airlines on-time record
- Southwest Airlines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.