Airport · BIL · Billings, Montana

Billings, MT

Billings, MT posts above-median on-time performance among the 382 tracked U.S. airports, as a mid-size U.S. airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 51,010 flights (2020–2025); its biggest delay driver is carrier.

Compiled by PlainFlights Editorial, Flight Performance Editorial Team

Data updated 2026-06-13

85.7%
On-time: Top 27%
on-time, US airports: 79 min
Delay when late: 0.73%
Cancelled

Key Performance Metrics

Total Flights

51,010

Best Month

Sep 95.7%

Worst Month

Dec 92.4%

Delayed

7,307

Cancelled

370

60-65%

1
65-70%

4
70-75%

9
75-80%

48
80-85%

192
85-90%

116
90-95%

12

What this shows BIL is marked in the 85-90% band.

Delay Cause Breakdown

Top delay cause: Carrier. Total delay minutes: 321,012.

Late Aircraft 27.1% (87,043 min)

Carrier 39.2% (125,698 min)

NAS (National Aviation System) 22.5% (72,282 min)

Weather 11.1% (35,756 min)

Security 0.1% (233 min)

Seasonal Performance Patterns

Monthly averages across all years of data. Best month: September (95.7% on-time). Most delays: December (92.4% on-time).

Month	Avg Flights	Avg Delayed	Avg Cancelled	On-Time %
December	694	118	6	92.4%
November	656	81	3	94.1%
October	713	81	2	94.9%
September	761	78	1	95.7%
August	869	133	4	93.7%
July	864	160	6	92.7%
June	752	134	4	93.1%
May	654	98	4	93.6%
April	609	75	11	94.8%
March	687	87	11	94.5%
February	603	82	6	94.1%
January	639	91	4	93.9%

Year-Over-Year Performance

Annual flight volume and on-time trends at BIL.

Year	Flights	Delayed	Cancelled	On-Time %
2025	9,683	685	42	92.9%
2024	8,296	537	32	93.5%
2023	6,964	432	44	93.8%
2022	8,322	569	45	93.2%
2021	10,928	597	82	94.5%
2020	6,817	272	125	96%

Cancellation & Diversion Analysis

Flight disruption statistics for Billings, MT.

Cancellation Rate

0.73%

370 of 51,010 flights

Diversion Rate

0.14%

73 of 51,010 flights

Delay Rate

14.3%

7,307 of 51,010 flights

Monthly Performance

Recent 24 months of flight data.

Period	Flights	Dep Delayed	Arr Delayed	Cancelled	Diverted
Dec 2025	728	41	63	6	0
Nov 2025	702	33	38	8	0
Oct 2025	863	40	50	0	1
Sep 2025	916	48	59	1	1
Aug 2025	956	79	102	2	8
Jul 2025	972	96	148	4	6
Jun 2025	935	83	126	3	3
May 2025	768	71	85	2	2
Apr 2025	717	48	68	3	2
Mar 2025	745	32	50	2	0
Feb 2025	652	59	63	8	0
Jan 2025	729	55	81	3	1
Dec 2024	745	42	61	0	1
Nov 2024	684	47	47	4	2
Oct 2024	733	40	34	0	0
Sep 2024	750	29	41	1	0
Aug 2024	826	51	90	3	1
Jul 2024	840	78	106	10	3
Jun 2024	790	65	125	4	1
May 2024	683	56	83	2	1
Apr 2024	642	31	46	2	0
Mar 2024	552	29	44	2	1
Feb 2024	496	20	34	0	0
Jan 2024	555	49	57	4	0

Top Routes from BIL

Busiest routes to and from Billings, MT.

Route	Flights	On-Time	Distance
BIL (Billings) → DEN (Denver)	7,478	81.6%	455 mi
DEN (Denver) → BIL (Billings)	7,472	78.8%	455 mi
BIL (Billings) → SLC (Salt Lake City)	6,399	91.5%	387 mi
SLC (Salt Lake City) → BIL (Billings)	6,398	90%	387 mi
BIL (Billings) → DFW (Dallas/Fort Worth)	3,502	81.8%	1,081 mi
DFW (Dallas/Fort Worth) → BIL (Billings)	3,502	81.8%	1,081 mi
MSP (Minneapolis) → BIL (Billings)	2,474	83.3%	748 mi
BIL (Billings) → MSP (Minneapolis)	2,473	89.3%	748 mi
BIL (Billings) → SEA (Seattle)	1,691	84.2%	664 mi
SEA (Seattle) → BIL (Billings)	1,691	85.8%	664 mi
BIL (Billings) → ORD (Chicago)	632	78.5%	1,060 mi
ORD (Chicago) → BIL (Billings)	632	82%	1,060 mi

Airports With a Similar On-Time Rate

Other U.S. airports nationwide whose on-time rate is closest to Billings, MT's 85.7%.

Melbourne, FL

85.7% on-time 31,111 flights

Brownsville, TX

85.7% on-time 18,838 flights

New Bern/Morehead/Beaufort, NC

85.7% on-time 8,887 flights

Salt Lake City, UT

85.8% on-time 1,319,985 flights

Bellingham, WA

85.8% on-time 29,229 flights

Flagstaff, AZ

85.8% on-time 22,330 flights

Other Airports in Montana

Compare performance with other Montana airports.

BZN 82.3%

Bozeman, MT

Bozeman · 117,386 flights

MSO 83.9%

Missoula, MT

Missoula · 52,758 flights

FCA 84.4%

Kalispell, MT

Kalispell · 50,123 flights

GTF 88.3%

Great Falls, MT

Great Falls · 29,395 flights

HLN 89.2%

Helena, MT

Helena · 17,569 flights

BTM 91%

Butte, MT

Butte · 8,024 flights

WYS 87.9%

West Yellowstone, MT

West Yellowstone · 3,872 flights

Keep exploring

More flight data around Billings, MT.

Montana flight data

Statewide on-time and delay aggregates, plus every reporting airport in Montana.

View MT data →

Airport rankings

See where BIL sits among U.S. airports on on-time rate and average delay.

Best on-time airports →

Compare airports

Put BIL head-to-head with another airport on delays and reliability.

Open comparison tool →

What the Data Says About BIL

Billings, MT in Billings, Montana handled 51,010 flights in the Bureau of Transportation Statistics dataset between 2020 and 2025, posting a 85.7% on-time departure rate. Of those flights, 7,307 experienced delays, 370 were cancelled, and 73 were diverted. The cancellation rate works out to 0.73%, the diversion rate to 0.14%, and the average delay when departures run late is 78.5 minutes. These figures are the baseline for comparing BIL against other airports in the same state and nationally.

Breaking down what drives delays at BIL, Carrier leads the pack. Carrier accounts for 39.2% of total delay minutes, followed by Late Aircraft at 27.1% and NAS (National Aviation System) at 22.5%. Weather contributes 11.1% of delay minutes at this airport, while security holds the smallest share at 0.1%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.

Seasonally, September runs the cleanest at BIL with a 95.7% on-time rate, while December is the roughest at 92.4% - a 3-point swing between best and worst month. Volume peaks in August, when average flights hit 869. The busiest route connecting BIL is to DEN (Denver), with 7,478 flights at a 81.6% on-time rate. Combine these numbers - 85.7% on-time, 78.5-minute average delay, 0.73% cancellation rate, and you have a concrete picture of departure reliability at Billings, MT.

Frequently Asked Questions

What is the on-time performance rate at Billings, MT (BIL)? ▼

Billings, MT has an overall on-time departure rate of 85.7%. Out of 51,010 total flights tracked, 7,307 experienced delays and 370 were cancelled.

What is the most common cause of delays at BIL? ▼

The top delay cause at Billings, MT is Carrier. Carrier accounts for 39.2% of all delay minutes.

What is the average delay time at BIL? ▼

The average delay at Billings, MT is 78.5 minutes. This includes delays from carrier issues, weather, National Aviation System constraints, security, and late-arriving aircraft.

What is the best month to fly from BIL? ▼

Based on historical data, September has the best on-time performance at BIL with 95.7% of flights departing on time.

What is the worst month for delays at BIL? ▼

December tends to have the most delays at BIL, with an on-time rate of only 92.4%.

How many routes operate from BIL? ▼

Billings, MT serves at least 12 routes. The busiest route is BIL to DEN (Billings - Denver) with 7,478 flights.

What is the cancellation rate at BIL? ▼

Billings, MT has a cancellation rate of 0.73%, based on 370 cancelled flights out of 51,010 total flights tracked.

Flight Guides

Data-driven guides to help you understand airport and flight performance.

Best & Worst Airlines for On-Time Performance

Which carriers consistently outperform peers

Why Flights Get Cancelled

Cancellation causes broken down by data

How to Choose Reliable Flight Routes

Use delay data to pick flights that arrive on time

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Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2025). Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.

Read our methodology - how this data is sourced, computed, and verified.

Using BIL's data

An airport-level on-time rate is a starting point, not a guarantee for your specific flight.

Check the busiest route from BIL before you book a connection. See top routes
Travel in September rather than December if your dates are flexible. Seasonal patterns
Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines

On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.

All airports → | Rankings →

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 Editorial

Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025 Accessed 2026-07-23

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.