77% of flights from Denver to Charleston arrived on time over the past 12 months. That is about the typical U.S. route. Most reliable airline: United Airlines (81%). 6% 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 DEN → CHS: when a flight was late, it was under 45 minutes late 67% of the time. About 1 in 19 flights landed an hour or more late; 0.3% were cancelled outright.
- On time or early77%
- 15–30 min late12%
- 30–60 min late5.4%
- 1–2 hours late3.9%
- 2–3 hours late1.1%
- 3+ hours late0.2%
- Diverted0.2%
- Cancelled0.3%
Share of all 662 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 | 450 | 81% | 0.4% | −2 min | 4.7% | +49 min | United Airlines |
| Southwest Airlines | 212 | 68% | 0.0% | +5 min | 6.1% | +41 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 DEN). Delays build through the day as late planes knock on, so early flights usually do best.
By airline and hour
| Departs | United Airlines |
|---|---|
| 9 a.m. | 83% |
By month
Each calendar month pooled over 2023–2026. Best: September (83%). Worst: July (65%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 100 | 78% | 0.0% |
| Tuesday | 87 | — | — |
| Wednesday | 88 | — | — |
| Thursday | 98 | — | — |
| Friday | 102 | 69% | 1.0% |
| Saturday | 83 | — | — |
| Sunday | 104 | 75% | 0.0% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: weather 2
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 1003 | 9:45 a.m. | 344 | 83% | 0.3% | −1 min | United Airlines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Aug 12, 2026 | 3 | 33% | 0 |
| Aug 28, 2026 | 3 | 33% | 0 |
| Aug 14, 2026 | 3 | 33% | 0 |
| Aug 23, 2026 | 3 | 67% | 0 |
| Aug 21, 2026 | 3 | 67% | 0 |
Questions
How often are flights from DEN to CHS on time?
77% of 662 scheduled flights from Denver, CO to Charleston, SC arrived within 15 minutes of schedule between September 2025 and August 2026. 0.3% were cancelled.
Which airline is most on time from DEN to CHS?
United Airlines: 81% of its 450 flights on the route arrived on time. Southwest Airlines: 68%.
What month has the most delays from DEN to CHS?
July (65% on time). The best month is September (83%), over 2023–2026.
Related
- CHS → DEN (return)
- Denver (DEN) delays by hour
- Flights into Charleston (CHS)
- 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.