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Route · DEN → BIL · 2020–2025 BTS data

Denver to Billings

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEN to BIL (Denver to Billings) ranks #1693 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.8%
On-time
-0.2 pts
vs US avg
69 min
Delay when late
7,472
Flights
#1693 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Oct 2025 91%

Worst Month

Jul 2025 62%

Distance

455 mi

Carriers

13

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 124 23 2 2 UA,OO
Nov 2025 146 17 4 0 OO,UA
Oct 2025 155 14 0 0 OO,UA
Sep 2025 167 26 0 1 UA,OO
Aug 2025 181 55 1 0 OO,UA
Jul 2025 183 69 3 2 OO,UA
Jun 2025 180 59 1 2 OO,UA
May 2025 165 42 1 1 OO,UA
Apr 2025 150 37 4 2 OO,UA
Mar 2025 126 16 1 0 OO,UA
Feb 2025 112 29 2 0 OO,UA
Jan 2025 124 42 0 0 OO,UA
Dec 2024 123 13 0 0 OO,UA
Nov 2024 116 25 3 0 OO,UA
Oct 2024 150 17 0 0 UA,OO
Sep 2024 150 17 0 0 OO,UA
Aug 2024 142 46 0 0 OO,UA
Jul 2024 138 38 2 0 OO,UA
Jun 2024 150 47 2 0 OO,UA
May 2024 129 29 0 0 OO,UA
Apr 2024 119 17 0 1 OO,UA
Mar 2024 68 15 0 0 OO,UA
Feb 2024 58 17 0 0 UA
Jan 2024 62 18 1 0 UA

DEN–BIL seasonal on-time pattern

Best: September (87.9%) · weakest: July (69.1%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 79.9%

Strongest calendar month

September

87.9% on-time · ~121 flights/mo

Busiest calendar month

August

~129 flights/mo avg

Weakest calendar month

July

69.1% on-time · ~121 flights/mo

Cancellation Rate

0.8%

27 of 3,218 flights

Diversion Rate

0.3%

11 of 3,218 flights

Explore origin & destination

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

DEN - Denver

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

DEN on-time profile

BIL - Billings

Full on-time, delay-cause, and seasonal performance for Billings, MT.

BIL on-time profile

Compare the two airports

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

Compare DEN vs BIL

Origin-hub reliability standing

Mid-pack among DEN departures

From DEN, this corridor sits with 133 other 75–85% on-time routes out of 168 tracked departures, not the hub's reliability leaders (8 at ≥85%) and not the softest ( 27 below 75%). Destination: Billings · fleet on-time rank #3576 of 4927.

What the Data Says About DEN to BIL

7,472 tracked flights put the DEN to BIL pairing (Denver to Billings) at a 78.8% on-time rate, squarely in line with the wider network. Delays that do occur run 69.4 minutes on average. Across the 455-mile route and its 13 carriers, the trailing 24 months show 0.8% cancelled and 0.3% diverted (3,218 flights sampled).

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 91% on-time, while Jul 2025 came in at just 62% - a 29-point swing worth factoring into travel timing.

On the multi-year calendar, DEN–BIL peaks in September at 87.9% on-time while August carries the heaviest traffic (~129 flights per month) ; the softest month is July at 69.1%, a 18.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does DEN to BIL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, DEN to BIL ranks #1693 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 DEN to BIL? ▼
Flights from Denver to Billings have a 78.8% on-time rate based on 7,472 flights. The average delay is 69.4 minutes. The best recent month was Oct 2025 with 91% on-time.
What is the cancellation rate for DEN to BIL? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (27 of 3,218 flights) and 0.3% were diverted.
How far is the flight from DEN to BIL? ▼
The flight distance from Denver (DEN) to Billings (BIL) is approximately 455 miles. This route is served by 13 carriers.
When is the best time to fly from DEN to BIL? ▼
The best recent month for on-time performance was Oct 2025 (91% on-time). The worst was Jul 2025 (62% on-time). Consider booking during months with historically better performance.

Airports on this route

DEN Airport

Denver
BIL Airport

Billings
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 DEN–BIL data

DEN–BIL is mid-pack at 78.8% on-time; month and carrier mix move more than the corridor headline.

  • Compare DEN and BIL airport profiles: delay causes and top routes differ even on the same corridor. DEN airport
  • If your dates flex, September (87.9% on-time) beats July (69.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.8% 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.