Route profile
CHS→ORD
Flight reliability, delays and best times to fly from Charleston to Chicago, 760 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 54% of comparable major US routes (4,598 compared)
Calculated from 5,112 flights. How this is calculated · What counts as on time
CHS → ORD arrives on time 81.5% of the time; the return trip, ORD → CHS, arrives on time 80.4% of the time.
CHS → ORD spends 34.3 minutes on the ground on a 760-mile trip: 16.4 minutes from pushback to wheels-up at CHS and 17.9 minutes from touchdown to gate at ORD.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
This route holds up about the same all year, a steadier seasonal pattern than 93% of 3,357 comparable routes.
87.9% on time in its best month (October) against 77.4% in its worst (May).
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 3,357 in the comparison.
What sets this route apart
Where CHS to ORD differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
CHS to ORD is at its best against routes of similar length for flights scheduled at 3 PM: 79.2% arrive on time, 7 points ahead of the 72.2% those routes manage at that hour. Against all other routes the gap is 6.5 points.
CHS to ORD holds up on Mondays better than routes of similar length do: 83.7% on time to their 77.0%, a 6.7 points lead. Against all other routes the gap is 6.5 points.
June is kinder to CHS to ORD than to routes of similar length: 81.6% on time against 71.9%, 9.7 points better. Against all other routes the gap is 8.9 points.
United Airlines does better on CHS to ORD than on its routes of similar length: 85.0% on time here, 78.9% there, 6.1 points apart. Against all other routes the gap is 5.1 points.
CHS to ORD against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 3 PM departures | 79.2% | routes of similar length | 72.2% | +7.0 pts | 404 here, 128,049 there |
| Weekday: Monday | 83.7% | routes of similar length | 77.0% | +6.7 pts | 749 here, 333,735 there |
| Month: June | 81.6% | routes of similar length | 71.9% | +9.7 pts | 490 here, 187,284 there |
| Airline: United Airlines | 85.0% | routes of similar length | 78.9% | +6.1 pts | 1,870 here, 351,086 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 760 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.
Why CHS → ORD flights are cancelled
July 2023 – July 2026
CHS → ORD cancelled 96 of 5,112 scheduled flights — about 1 in every 53. The reason filed most often was extreme weather, 59.4% of the cancellations coded on this route — about 1 in every 90 scheduled flights.
Share of cancellations
Of 96 cancelled departures carrying a reason code.
What each reason means
Conditions the carrier judged severe enough to stop the flight: a blizzard, a hurricane, a line of thunderstorms.
57 cancellations, 59.4% of the total.
Airport capacity, air traffic control flow programs, heavy traffic and ordinary bad weather. A system decision, not the airline’s.
20 cancellations, 20.8% of the total.
Crew, maintenance, aircraft cleaning, baggage or fueling: what BTS counts as within the carrier’s own control.
19 cancellations, 19.8% of the total.
A terminal evacuation, a security breach, screening equipment failure, or screening queues over 29 minutes.
0 cancellations, 0.0% of the total.
Reason codes are the operating airline’s own filing with US DOT, not an independent finding of fault. Ordinary bad weather is filed under air traffic, so weather’s full share is larger than its bar.
96 coded cancellations were recorded on CHS → ORD; the section appears from 50.
When it goes wrong
July 2023 – July 2026
36 min late
against a median of 8 min early
Percentiles over 5,112 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at ORD after arriving from CHS.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 33% | Likely to miss |
| 45 min | 18% | High risk |
| 60 min | 11% | Some risk |
| 90 min | 6.2% | Some risk |
| 120 min | 4.0% | 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 1.88% of the time and diverts 0.45% of the time, which a late arrival never shows up in.
Chance of missing is the share of 4,993 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 36 minutes late (90th-percentile gate arrival delay), over 5,112 operations.
Any other layover length: connection checker.
Best time to fly
CHS → ORD flights departing 5–9 AM arrived on time 89.0% of the time, against 62.4% for 6–9 PM departures, a gap of 26.6 percentage points.
By departure window
By departure hour
- 12 AM to 5 AM: too few flights to score
- 6 AM: 90.2% on time from 918 flights
- 7 AM: 86.9% on time from 281 flights
- 8 AM to 10 AM: too few flights to score
- 11 AM: 87.3% on time from 1,036 flights
- 12 PM: 80.5% on time from 599 flights
- 1 PM: 81.7% on time from 296 flights
- 2 PM: too few flights to score
- 3 PM: 79.2% on time from 422 flights
- 4 PM: 73.3% on time from 704 flights
- 5 PM: 68.0% on time from 204 flights
- 6 PM: 64.0% on time from 209 flights
- 7 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why CHS → ORD 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
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for CHS → ORD. 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 | 1,907 | 85.0% | 1.63% | -8 min | 5.2% |
| Republic Airways | 1,290 | 80.2% | 2.33% | -11 min | 5.8% |
| Envoy Air | 1,273 | 77.5% | 1.96% | -6 min | 7.8% |
| American Airlines | 345 | 82.1% | 1.45% | -11 min | 7.1% |
| SkyWest Airlines | 296 | 80.4% | 1.69% | -7 min | 7.9% |
United Airlines flew 37.3% of the 5,111 flights listed.
United Airlines arrived on time 7.5 percentage points more often than Envoy Air on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| UA2333 United Airlines | 6:30 AM | 677 | 90.1% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Friday the least, a gap of 7.1 percentage points.
By month
- Jan: 80.8%
- Feb: 83.2%
- Mar: 79.7%
- Apr: 77.8%
- May: 77.4%
- Jun: 81.6%
- Jul: 77.7%
- Aug: 82.8%
- Sep: 87.5%
- Oct: 87.9%
- Nov: 83.6%
- Dec: 81.6%
May is historically the weakest month and October the strongest, a spread of 10.5 percentage points.
Reliability over time
July 2023 – July 2026
- July 2023: 74.2% from 127 flights
- August 2023: too few flights to score (114)
- September 2023: too few flights to score (88)
- October 2023: too few flights to score (118)
- November 2023: too few flights to score (111)
- December 2023: too few flights to score (103)
- January 2024: too few flights to score (86)
- February 2024: too few flights to score (93)
- March 2024: 88.2% from 120 flights
- April 2024: 87.5% from 120 flights
- May 2024: 79.2% from 122 flights
- June 2024: 85.8% from 136 flights
- July 2024: too few flights to score (111)
- August 2024: too few flights to score (116)
- September 2024: too few flights to score (119)
- October 2024: 95.8% from 120 flights
- November 2024: too few flights to score (109)
- December 2024: too few flights to score (105)
- January 2025: too few flights to score (84)
- February 2025: too few flights to score (106)
- March 2025: 84.7% from 151 flights
- April 2025: 74.3% from 151 flights
- May 2025: 73.7% from 157 flights
- June 2025: 82.5% from 168 flights
- July 2025: 68.7% from 171 flights
- August 2025: 83.5% from 139 flights
- September 2025: 79.3% from 145 flights
- October 2025: 82.4% from 176 flights
- November 2025: 74.3% from 178 flights
- December 2025: 73.7% from 172 flights
- January 2026: 80.7% from 145 flights
- February 2026: 77.7% from 152 flights
- March 2026: 70.5% from 209 flights
- April 2026: 74.2% from 194 flights
- May 2026: 79.2% from 208 flights
- June 2026: 77.9% from 202 flights
- July 2026: 81.9% from 186 flights
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 77.7% against 81.8% in the 12 months before — declining by 4.1 percentage points.
Data and methodology
Calculated by FlyerIntel from 5,112 CHS → ORD 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