Route profile
CHS→DEN
Flight reliability, delays and best times to fly from Charleston to Denver, 1,449 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 38% of comparable major US routes (4,598 compared)
Calculated from 2,131 flights. How this is calculated · What counts as on time
CHS → DEN arrives on time 75.4% of the time; the return trip, DEN → CHS, arrives on time 76.1% of the time.
CHS → DEN spends 24.8 minutes on the ground on a 1,449-mile trip: 15.1 minutes from pushback to wheels-up at CHS and 9.7 minutes from touchdown to gate at DEN.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Every airline on this route performs about the same, a narrower carrier gap than 92% of 2,692 comparable routes.
Southwest Airlines (76.3% on time) and United Airlines (74.7%) are close together here.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 2,692 in the comparison.
What sets this route apart
Where CHS to DEN differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
CHS to DEN struggles most at 2 PM: 65.0% of its flights scheduled then arrive on time, 8.2 points behind the 73.2% on routes of similar length at the same hour. Against all other routes the gap is 9.6 points.
CHS to DEN is at its best against routes of similar length for flights scheduled at 1 PM: 82.6% arrive on time, 6.9 points ahead of the 75.7% those routes manage at that hour.
Tuesday is the day CHS to DEN slips furthest against routes of similar length, 74.5% on time where they average 80.7%, 6.2 points lower. Against all other routes the gap is 7.1 points.
In June, CHS to DEN runs 11.7 points below routes of similar length, 59.9% on time to 71.6%. Against all other routes the gap is 12.8 points.
United Airlines’ flights on CHS to DEN arrive on time 74.7% of the time, 6.1 points below the 80.8% it manages on its routes of similar length. Against all other routes the gap is 5.2 points.
CHS to DEN against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 2 PM departures | 65.0% | routes of similar length | 73.2% | −8.2 pts | 123 here, 85,271 there |
| Hour: 1 PM departures | 82.6% | routes of similar length | 75.7% | +6.9 pts | 184 here, 90,909 there |
| Weekday: Tuesday | 74.5% | routes of similar length | 80.7% | −6.2 pts | 286 here, 216,582 there |
| Month: June | 59.9% | routes of similar length | 71.6% | −11.7 pts | 172 here, 132,329 there |
| Airline: United Airlines | 74.7% | routes of similar length | 80.8% | −6.1 pts | 1,172 here, 319,016 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,449 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
53 min late
against a median of 3 min early
Percentiles over 2,131 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at DEN after arriving from CHS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 44% | Likely to miss |
| 45 min | 23% | High risk |
| 60 min | 15% | High risk |
| 90 min | 8.8% | Some risk |
| 120 min | 5.0% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.70% of the time and diverts 1.08% of the time, which a late arrival never shows up in.
Chance of missing is the share of 2,093 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 53 minutes late (90th-percentile gate arrival delay), over 2,131 operations.
Any other layover length: connection checker.
Best time to fly
CHS → DEN flights departing 5–9 AM arrived on time 89.7% of the time, against 70.3% for 3–6 PM departures, a gap of 19.4 percentage points.
By departure window
By departure hour
- 12 AM to 7 AM: too few flights to score
- 8 AM: 89.2% on time from 224 flights
- 9 AM to 12 PM: too few flights to score
- 1 PM: 82.6% on time from 185 flights
- 2 PM: 65.0% on time from 127 flights
- 3 PM: too few flights to score
- 4 PM: 71.8% on time from 1,120 flights
- 5 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why CHS → DEN runs late
July 2023 – July 2026
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for CHS → DEN. Only delays of 15 minutes or more are attributed. What the five causes mean
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| United Airlines | 1,198 | 74.7% | 0.92% | -2 min | 9.9% |
| Southwest Airlines | 933 | 76.3% | 0.43% | -5 min | 7.7% |
United Airlines flew 56.2% of the 2,131 flights listed.
Carriers on this route performed within a couple of percentage points of each other.
Weekly and seasonal patterns
By day of week
Monday is historically the most reliable day and Thursday the least, a gap of 5.2 percentage points.
By month
- Jan: 81.3%
- Feb: 79.3%
- Mar: 79.8%
- Apr: 74.7%
- May: 68.8%
- Jun: 59.9%
- Jul: 67.5%
- Aug: 73.3%
- Sep: 79.5%
- Oct: 79.0%
- Nov: 84.4%
- Dec: 82.4%
June is historically the weakest month and November the strongest, a spread of 24.5 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 69.4% against 73.7% in the 12 months before — declining by 4.3 percentage points.
Data and methodology
Calculated by FlyerIntel from 2,131 CHS → DEN flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed