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Route · ATL → DEN · 2020–2025 BTS data

Atlanta to Denver

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ATL to DEN (Atlanta to Denver) ranks #86 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

79.6%
On-time
+0.6 pts
vs US avg
65 min
Delay when late
33,476
Flights
#86 of 4927
Corpus placement

Cancelled

0.9%

Best Month

Oct 2024 89%

Worst Month

Jun 2025 61%

Distance

1,199 mi

Carriers

27

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 457 143 8 0 DL,WN,F9,UA
Nov 2025 449 60 5 0 UA,DL,F9,WN
Oct 2025 474 103 0 1 DL,UA,WN,F9
Sep 2025 450 83 1 1 UA,WN,DL,F9
Aug 2025 495 140 4 3 WN,F9,UA,DL
Jul 2025 526 159 4 11 DL,UA,WN,F9
Jun 2025 508 197 6 1 DL,UA,WN,F9
May 2025 482 178 1 5 DL,UA,WN,F9
Apr 2025 452 147 1 2 DL,F9,UA,WN
Mar 2025 446 88 4 1 DL,UA,WN,F9
Feb 2025 393 97 0 0 DL,UA,WN,F9
Jan 2025 440 99 19 1 DL,UA,WN,F9
Dec 2024 488 108 0 0 DL,F9,UA,WN
Nov 2024 465 74 1 0 UA,WN,DL,F9
Oct 2024 500 53 1 1 UA,DL,F9,WN
Sep 2024 494 91 2 0 WN,UA,DL,F9
Aug 2024 518 91 2 5 DL,F9,WN,UA
Jul 2024 552 167 31 3 DL,F9,UA,WN
Jun 2024 542 128 2 1 DL,F9,UA,WN
May 2024 557 195 2 7 DL,F9,UA,WN
Apr 2024 531 135 1 0 DL,F9,UA,WN
Mar 2024 509 61 4 0 DL,F9,UA,WN
Feb 2024 450 70 0 2 DL,F9,UA,WN
Jan 2024 470 91 10 0 DL,F9,WN,UA

ATL–DEN seasonal on-time pattern

Best: November (86.5%) · weakest: May (71.9%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 76.8%

Strongest calendar month

November

86.5% on-time · ~455 flights/mo

Busiest calendar month

July

~509 flights/mo avg

Weakest calendar month

May

71.9% on-time · ~447 flights/mo

Cancellation Rate

0.9%

109 of 11,648 flights

Diversion Rate

0.4%

45 of 11,648 flights

Explore origin & destination

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

ATL - Atlanta

Full on-time, delay-cause, and seasonal performance for Atlanta, GA.

ATL 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 ATL and DEN side by side on delays, cancellations, and reliability.

Compare ATL vs DEN

Origin-hub reliability standing

Mid-pack among ATL departures

From ATL, this corridor sits with 75 other 75–85% on-time routes out of 144 tracked departures, not the hub's reliability leaders (67 at ≥85%) and not the softest ( 2 below 75%). Destination: Denver · fleet on-time rank #3288 of 4927.

What the Data Says About ATL to DEN

33,476 tracked flights put the ATL to DEN pairing (Atlanta to Denver) at a 79.6% on-time rate, squarely in line with the wider network. Delays that do occur run 64.8 minutes on average. Across the 1,199-mile route and its 27 carriers, the trailing 24 months show 0.9% cancelled and 0.4% diverted (11,648 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 89% on-time, while Jun 2025 came in at just 61% - a 28-point swing worth factoring into travel timing.

On the multi-year calendar, ATL–DEN peaks in November at 86.5% on-time while July carries the heaviest traffic (~509 flights per month) ; the softest month is May at 71.9%, a 14.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does ATL to DEN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, ATL to DEN ranks #86 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 ATL to DEN? ▼
Flights from Atlanta to Denver have a 79.6% on-time rate based on 33,476 flights. The average delay is 64.8 minutes. The best recent month was Oct 2024 with 89% on-time.
What is the cancellation rate for ATL to DEN? ▼
Over the last 24 months, 0.9% of flights on this route were cancelled (109 of 11,648 flights) and 0.4% were diverted.
How far is the flight from ATL to DEN? ▼
The flight distance from Atlanta (ATL) to Denver (DEN) is approximately 1,199 miles. This route is served by 27 carriers.
When is the best time to fly from ATL to DEN? ▼
The best recent month for on-time performance was Oct 2024 (89% on-time). The worst was Jun 2025 (61% on-time). Consider booking during months with historically better performance.

Airports on this route

ATL Airport

Atlanta
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 ATL–DEN data

ATL–DEN is mid-pack at 79.6% on-time; month and carrier mix move more than the corridor headline.

  • Compare ATL and DEN airport profiles: delay causes and top routes differ even on the same corridor. ATL airport
  • If your dates flex, November (86.5% on-time) beats May (71.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 79.6% 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.