PlainFlights

Route · IAH → DEN · 2020–2025 BTS data

Houston to Denver

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to DEN (Houston to Denver) ranks #161 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80%
On-time
+1 pts
vs US avg
74 min
Delay when late
27,947
Flights
#161 of 4927
Corpus placement

Cancelled

1.2%

Best Month

Oct 2024 91%

Worst Month

May 2024 60%

Distance

862 mi

Carriers

21

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 390 61 0 0 F9,UA
Nov 2025 357 61 0 0 UA,F9
Oct 2025 396 67 1 0 UA,F9
Sep 2025 383 69 1 0 UA,F9
Aug 2025 403 107 1 2 F9,UA
Jul 2025 402 109 0 6 UA,F9
Jun 2025 390 114 4 2 UA,F9
May 2025 374 95 1 3 UA,F9
Apr 2025 355 81 1 0 F9,UA
Mar 2025 372 59 2 2 UA,F9
Feb 2025 336 64 0 0 UA,F9
Jan 2025 378 87 15 2 UA,F9
Dec 2024 388 82 1 0 F9,UA
Nov 2024 385 69 1 1 UA,F9
Oct 2024 403 38 0 0 UA,F9
Sep 2024 390 55 1 2 UA,F9
Aug 2024 415 84 2 0 F9,WN,UA
Jul 2024 467 142 30 1 F9,UA,WN
Jun 2024 455 140 2 4 F9,UA,WN
May 2024 468 188 12 3 F9,UA,WN
Apr 2024 441 84 1 0 F9,OO,UA,WN
Mar 2024 453 76 7 0 F9,UA,WN
Feb 2024 382 57 3 3 F9,UA,WN
Jan 2024 410 102 28 2 F9,WN,UA

IAH–DEN seasonal on-time pattern

Best: November (86.2%) · weakest: June (71.5%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 80.8%

Strongest calendar month

November

86.2% on-time · ~377 flights/mo

Busiest calendar month

August

~418 flights/mo avg

Weakest calendar month

June

71.5% on-time · ~393 flights/mo

Cancellation Rate

1.2%

114 of 9,593 flights

Diversion Rate

0.3%

33 of 9,593 flights

Explore origin & destination

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

IAH - Houston

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

IAH on-time profile

DEN - Denver

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

DEN on-time profile

Compare the two airports

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

Compare IAH vs DEN

Origin-hub reliability standing

Mid-pack among IAH departures

From IAH, this corridor sits with 79 other 75–85% on-time routes out of 102 tracked departures, not the hub's reliability leaders (17 at ≥85%) and not the softest ( 6 below 75%). Destination: Denver · fleet on-time rank #3145 of 4927.

What the Data Says About IAH to DEN

27,947 tracked flights put the IAH to DEN pairing (Houston to Denver) at a 80% on-time rate, squarely in line with the wider network. Delays that do occur run 73.8 minutes on average. Across the 862-mile route and its 21 carriers, the trailing 24 months show 1.2% cancelled and 0.3% diverted (9,593 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 91% on-time, while May 2024 came in at just 60% - a 31-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–DEN peaks in November at 86.2% on-time while August carries the heaviest traffic (~418 flights per month) ; the softest month is June at 71.5%, a 14.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to DEN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to DEN ranks #161 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 IAH to DEN? ▼
Flights from Houston to Denver have a 80% on-time rate based on 27,947 flights. The average delay is 73.8 minutes. The best recent month was Oct 2024 with 91% on-time.
What is the cancellation rate for IAH to DEN? ▼
Over the last 24 months, 1.2% of flights on this route were cancelled (114 of 9,593 flights) and 0.3% were diverted.
How far is the flight from IAH to DEN? ▼
The flight distance from Houston (IAH) to Denver (DEN) is approximately 862 miles. This route is served by 21 carriers.
When is the best time to fly from IAH to DEN? ▼
The best recent month for on-time performance was Oct 2024 (91% on-time). The worst was May 2024 (60% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
DEN Airport

Denver
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 IAH–DEN data

IAH–DEN is mid-pack at 80% on-time; month and carrier mix move more than the corridor headline.

  • Compare IAH and DEN airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, November (86.2% on-time) beats June (71.5%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80% 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.