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Route · COS → MDW · 2020–2025 BTS data

Colorado Springs to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), COS to MDW (Colorado Springs to Chicago) ranks #3942 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.4%
On-time
+5.4 pts
vs US avg
59 min
Delay when late
1,804
Flights
#3942 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Jul 2024 85%

Worst Month

Jul 2025 74%

Distance

917 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2025 31 3 0 0 WN
Sep 2025 30 4 0 0 WN
Aug 2025 33 7 0 1 WN
Jul 2025 54 14 0 2 WN
Jun 2025 48 14 0 0 WN
Dec 2024 31 6 1 0 WN
Nov 2024 30 5 1 0 WN
Oct 2024 31 0 0 0 WN
Sep 2024 30 3 0 0 WN
Aug 2024 33 7 0 0 WN
Jul 2024 53 8 0 0 WN
Jun 2024 49 9 0 0 WN
May 2024 31 12 1 0 WN
Jan 2024 31 6 1 0 WN
Dec 2023 31 11 0 1 WN
Nov 2023 30 8 0 0 WN
Oct 2023 31 7 0 0 WN
Sep 2023 30 5 0 0 WN
Aug 2023 43 5 1 0 WN
Jul 2023 55 13 1 0 WN
Jun 2023 50 9 0 0 WN
May 2023 31 1 0 0 WN
Apr 2023 30 8 0 0 WN
Mar 2023 31 3 1 0 WN

COS–MDW seasonal on-time pattern

Best: March (94.2%) · weakest: July (77.7%)

75%80%85%90%95%100% JanMarAprMayJunJulAugSepOctNovDec 78.2%

Strongest calendar month

March

94.2% on-time · ~34 flights/mo

Busiest calendar month

July

~55 flights/mo avg

Weakest calendar month

July

77.7% on-time · ~55 flights/mo

Cancellation Rate

0.8%

7 of 877 flights

Diversion Rate

0.5%

4 of 877 flights

Explore origin & destination

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

COS - Colorado Springs

Full on-time, delay-cause, and seasonal performance for Colorado Springs, CO.

COS 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 COS and MDW side by side on delays, cancellations, and reliability.

Compare COS vs MDW

Origin-hub reliability standing

Mid-pack among COS departures

From COS, this corridor sits with 7 other 75–85% on-time routes out of 11 tracked departures, not the hub's reliability leaders (4 at ≥85%) and not the softest ( 0 below 75%). Destination: Chicago · fleet on-time rank #1423 of 4927.

What the Data Says About COS to MDW

Bureau of Transportation Statistics records show Colorado Springs to Chicago (COS to MDW) running a 84.4% on-time rate over 1,804 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 58.9 minutes. The 917-mile corridor is served by 1 carrier, and over the last 24 months 0.8% of 877 flights were cancelled, 0.5% diverted.

Monthly performance varies moderately here: Jul 2024 was the strongest month at 85% on-time versus Jul 2025 at 74%, a 11-point difference.

On the multi-year calendar, COS–MDW peaks in March at 94.2% on-time while July carries the heaviest traffic (~55 flights per month) ; the softest month is July at 77.7%, a 16.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does COS to MDW rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, COS to MDW ranks #3942 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 COS to MDW? ▼
Flights from Colorado Springs to Chicago have a 84.4% on-time rate based on 1,804 flights. The average delay is 58.9 minutes. The best recent month was Jul 2024 with 85% on-time.
What is the cancellation rate for COS to MDW? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (7 of 877 flights) and 0.5% were diverted.
How far is the flight from COS to MDW? ▼
The flight distance from Colorado Springs (COS) to Chicago (MDW) is approximately 917 miles. This route is served by 1 carrier.
When is the best time to fly from COS to MDW? ▼
The best recent month for on-time performance was Jul 2024 (85% on-time). The worst was Jul 2025 (74% on-time). Consider booking during months with historically better performance.

Airports on this route

COS Airport

Colorado Springs
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 COS–MDW data

COS–MDW runs 5.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare COS and MDW airport profiles: delay causes and top routes differ even on the same corridor. COS airport
  • If your dates flex, March (94.2% on-time) beats July (77.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.4% 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.