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Route · CHS → MDW · 2020–2025 BTS data

Charleston to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), CHS to MDW (Charleston to Chicago) ranks #3283 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.8%
On-time
+6.8 pts
vs US avg
59 min
Delay when late
3,033
Flights
#3283 of 4927
Corpus placement

Cancelled

1.0%

Best Month

Mar 2024 93%

Worst Month

Jul 2023 78%

Distance

745 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2025 35 6 0 0 WN
Sep 2025 34 2 0 0 WN
Aug 2025 36 2 0 0 WN
Jul 2025 39 5 0 0 WN
Jun 2025 39 3 0 0 WN
May 2025 35 5 0 0 WN
Apr 2025 35 5 0 0 WN
Mar 2025 37 5 1 0 WN
Oct 2024 35 0 0 0 WN
Sep 2024 34 3 0 0 WN
Aug 2024 36 4 2 0 WN
Jul 2024 39 8 0 0 WN
Jun 2024 40 9 0 0 WN
May 2024 57 7 1 0 WN
Apr 2024 57 8 0 0 WN
Mar 2024 57 4 0 0 WN
Feb 2024 33 4 0 0 WN
Jan 2024 35 8 1 0 WN
Dec 2023 39 0 2 0 WN
Nov 2023 36 3 0 1 WN
Oct 2023 51 5 0 0 WN
Sep 2023 56 10 0 0 WN
Aug 2023 62 11 3 0 WN
Jul 2023 60 13 0 0 WN

CHS–MDW seasonal on-time pattern

Best: October (90.7%) · weakest: July (80.3%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 87.4%

Strongest calendar month

October

90.7% on-time · ~47 flights/mo

Busiest calendar month

July

~62 flights/mo avg

Weakest calendar month

July

80.3% on-time · ~62 flights/mo

Cancellation Rate

1.0%

10 of 1,017 flights

Diversion Rate

0.1%

1 of 1,017 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

CHS - Charleston

Full on-time, delay-cause, and seasonal performance for Charleston, SC.

CHS on-time profile

MDW - Chicago

Full on-time, delay-cause, and seasonal performance for Chicago, IL.

MDW on-time profile

Compare the two airports

See CHS and MDW side by side on delays, cancellations, and reliability.

Compare CHS vs MDW

Origin-hub reliability standing

Among CHS's stronger departures

CHS → MDW posts a 85.8% on-time rate, landing in the ≥85% band with 3 of 21 BTS-tracked routes leaving Charleston. The same hub also shows 18 mid-band and 0 challenged departures · fleet-wide on-time rank #950 of 4927 (highest on-time = #1).

What the Data Says About CHS to MDW

Charleston to Chicago (CHS to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.8% on-time rate across 3,033 flights, with delays that do happen averaging 59.4 minutes. The corridor runs roughly 745 miles and is served by 1 carrier. Over the most recent 24 months, 10 of 1,017 flights were cancelled (1.0%) and 1 diverted (0.1%).

Monthly performance varies moderately here: Mar 2024 was the strongest month at 93% on-time versus Jul 2023 at 78%, a 15-point difference.

On the multi-year calendar, CHS–MDW peaks in October at 90.7% on-time while July carries the heaviest traffic (~62 flights per month) ; the softest month is July at 80.3%, a 10.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does CHS to MDW rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, CHS to MDW ranks #3283 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from CHS to MDW? ▼
Flights from Charleston to Chicago have a 85.8% on-time rate based on 3,033 flights. The average delay is 59.4 minutes. The best recent month was Mar 2024 with 93% on-time.
What is the cancellation rate for CHS to MDW? ▼
Over the last 24 months, 1.0% of flights on this route were cancelled (10 of 1,017 flights) and 0.1% were diverted.
How far is the flight from CHS to MDW? ▼
The flight distance from Charleston (CHS) to Chicago (MDW) is approximately 745 miles. This route is served by 1 carrier.
When is the best time to fly from CHS to MDW? ▼
The best recent month for on-time performance was Mar 2024 (93% on-time). The worst was Jul 2023 (78% on-time). Consider booking during months with historically better performance.

Airports on this route

CHS Airport

Charleston
MDW Airport

Chicago
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using CHS–MDW data

CHS–MDW runs 6.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare CHS and MDW airport profiles: delay causes and top routes differ even on the same corridor. CHS airport
  • If your dates flex, October (90.7% on-time) beats July (80.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.8% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.