Route · BIL → DEN · 2020–2025 BTS data
Billings to Denver
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BIL to DEN (Billings to Denver) ranks #1691 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 81.6%
- On-time
- +2.6 pts
- vs US avg
- 80 min
- Delay when late
- 7,478
- Flights
- #1691 of 4927
- Corpus placement
Cancelled
1.0%
Best Month
Dec 2024 95%
Worst Month
Feb 2025 64%
Distance
455 mi
Carriers
12
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 125 | 23 | 3 | 0 | UA,OO |
| Nov 2025 | 146 | 19 | 4 | 0 | OO,UA |
| Oct 2025 | 155 | 21 | 0 | 0 | OO,UA |
| Sep 2025 | 167 | 32 | 0 | 1 | UA,OO |
| Aug 2025 | 181 | 57 | 1 | 1 | OO,UA |
| Jul 2025 | 183 | 51 | 3 | 5 | OO,UA |
| Jun 2025 | 180 | 60 | 2 | 3 | OO,UA |
| May 2025 | 165 | 50 | 2 | 1 | OO,UA |
| Apr 2025 | 150 | 37 | 3 | 1 | OO,UA |
| Mar 2025 | 125 | 16 | 1 | 0 | OO,UA |
| Feb 2025 | 112 | 40 | 2 | 0 | OO,UA |
| Jan 2025 | 124 | 33 | 1 | 0 | OO,UA |
| Dec 2024 | 123 | 6 | 0 | 0 | OO,UA |
| Nov 2024 | 116 | 24 | 3 | 0 | OO,UA |
| Oct 2024 | 151 | 16 | 0 | 0 | UA,OO |
| Sep 2024 | 150 | 16 | 0 | 0 | OO,UA |
| Aug 2024 | 142 | 27 | 0 | 0 | OO,UA |
| Jul 2024 | 138 | 24 | 2 | 0 | OO,UA |
| Jun 2024 | 150 | 28 | 3 | 1 | OO,UA |
| May 2024 | 128 | 16 | 1 | 0 | OO,UA |
| Apr 2024 | 119 | 14 | 0 | 0 | OO,UA |
| Mar 2024 | 68 | 8 | 0 | 0 | OO,UA |
| Feb 2024 | 58 | 15 | 0 | 0 | UA |
| Jan 2024 | 62 | 14 | 2 | 0 | UA |
BIL–DEN seasonal on-time pattern
Best: September (87.5%) · weakest: February (75.7%)
Strongest calendar month
September
87.5% on-time · ~122 flights/mo
Busiest calendar month
August
~129 flights/mo avg
Weakest calendar month
February
75.7% on-time · ~82 flights/mo
Cancellation Rate
1.0%
33 of 3,218 flights
Diversion Rate
0.4%
13 of 3,218 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BIL - Billings
Full on-time, delay-cause, and seasonal performance for Billings, MT.
BIL on-time profileDEN - Denver
Full on-time, delay-cause, and seasonal performance for Denver, CO.
DEN on-time profileCompare the two airports
See BIL and DEN side by side on delays, cancellations, and reliability.
Compare BIL vs DENOrigin-hub reliability standing
Mid-pack among BIL departures
From BIL, this corridor sits with 4 other 75–85% on-time routes out of 6 tracked departures, not the hub's reliability leaders (2 at ≥85%) and not the softest ( 0 below 75%). Destination: Denver · fleet on-time rank #2497 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BIL–DEN.
Routes with a similar on-time rate
What the Data Says About BIL to DEN
7,478 tracked flights put the BIL to DEN pairing (Billings to Denver) at a 81.6% on-time rate, squarely in line with the wider network. Delays that do occur run 79.5 minutes on average. Across the 455-mile route and its 12 carriers, the trailing 24 months show 1.0% cancelled and 0.4% diverted (3,218 flights sampled).
The monthly split is wide on this route: Dec 2024 posted the strongest performance at 95% on-time, while Feb 2025 came in at just 64% - a 31-point swing worth factoring into travel timing.
On the multi-year calendar, BIL–DEN peaks in September at 87.5% on-time while August carries the heaviest traffic (~129 flights per month) ; the softest month is February at 75.7%, a 11.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BIL to DEN rank among US routes by traffic? ▼
How often are flights delayed from BIL to DEN? ▼
What is the cancellation rate for BIL to DEN? ▼
How far is the flight from BIL to DEN? ▼
When is the best time to fly from BIL to DEN? ▼
Airports on this route
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 BIL–DEN data
BIL–DEN is mid-pack at 81.6% on-time; month and carrier mix move more than the corridor headline.
- Compare BIL and DEN airport profiles: delay causes and top routes differ even on the same corridor. BIL airport
- If your dates flex, September (87.5% on-time) beats February (75.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 81.6% 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.
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.