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Route · COS → IAH · 2020–2025 BTS data

Colorado Springs to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), COS to IAH (Colorado Springs to Houston) ranks #3351 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.7%
On-time
+4.7 pts
vs US avg
88 min
Delay when late
2,890
Flights
#3351 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Oct 2024 94%

Worst Month

Jul 2024 69%

Distance

809 mi

Carriers

7

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Nov 2025 30 4 0 0 OO
Oct 2025 36 2 0 0 OO
Sep 2025 30 0 0 0 OO
Aug 2025 31 4 0 0 OO
Jul 2025 31 9 0 0 OO
Jan 2025 32 4 2 0 OO
Dec 2024 32 5 0 0 OO
Nov 2024 51 14 0 0 OO
Oct 2024 53 3 0 0 OO
Sep 2024 33 8 0 0 OO
Aug 2024 44 7 0 0 OO
Jul 2024 54 17 3 0 OO
Jun 2024 49 5 0 0 OO
May 2024 38 11 2 1 OO
Jan 2024 31 7 1 0 OO
Dec 2023 34 7 0 0 OO
Nov 2023 36 6 0 0 OO,UA
Oct 2023 38 8 0 0 OO
Sep 2023 53 6 0 1 OO
Aug 2023 31 4 0 0 OO
Jul 2023 31 8 0 0 OO
Apr 2023 30 8 1 0 OO
Mar 2023 31 5 0 0 OO
Jan 2023 34 6 1 1 OO

COS–IAH seasonal on-time pattern

Best: October (89.2%) · weakest: July (73.8%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 86.5%

Strongest calendar month

October

89.2% on-time · ~57 flights/mo

Busiest calendar month

June

~66 flights/mo avg

Weakest calendar month

July

73.8% on-time · ~54 flights/mo

Cancellation Rate

1.1%

10 of 893 flights

Diversion Rate

0.3%

3 of 893 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

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

Compare the two airports

See COS and IAH side by side on delays, cancellations, and reliability.

Compare COS vs IAH

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: Houston · fleet on-time rank #1687 of 4927.

What the Data Says About COS to IAH

Bureau of Transportation Statistics records show Colorado Springs to Houston (COS to IAH) running a 83.7% on-time rate over 2,890 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 88.3 minutes. The 809-mile corridor is served by 7 carriers, and over the last 24 months 1.1% of 893 flights were cancelled, 0.3% diverted.

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 94% on-time, while Jul 2024 came in at just 69% - a 26-point swing worth factoring into travel timing.

On the multi-year calendar, COS–IAH peaks in October at 89.2% on-time while June carries the heaviest traffic (~66 flights per month) ; the softest month is July at 73.8%, a 15.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does COS to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, COS to IAH ranks #3351 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 IAH? ▼
Flights from Colorado Springs to Houston have a 83.7% on-time rate based on 2,890 flights. The average delay is 88.3 minutes. The best recent month was Oct 2024 with 94% on-time.
What is the cancellation rate for COS to IAH? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (10 of 893 flights) and 0.3% were diverted.
How far is the flight from COS to IAH? ▼
The flight distance from Colorado Springs (COS) to Houston (IAH) is approximately 809 miles. This route is served by 7 carriers.
When is the best time to fly from COS to IAH? ▼
The best recent month for on-time performance was Oct 2024 (94% on-time). The worst was Jul 2024 (69% on-time). Consider booking during months with historically better performance.

Airports on this route

COS Airport

Colorado Springs
IAH Airport

Houston
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–IAH data

COS–IAH runs 4.7 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 IAH airport profiles: delay causes and top routes differ even on the same corridor. COS airport
  • If your dates flex, October (89.2% on-time) beats July (73.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.7% 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.