Route Reliability

Airport reliability

Billings (BIL) on-time performance

How reliably flights leave Billings, MT (BIL) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Billings, MT4,578 departures in 12 months

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Departures on time
84.6%
U.S. average 75.6%
Cancelled
0.7%
U.S. average 1.9%
60+ minutes late
5.9%
U.S. average 8.1%
Scheduled departures
4,578
12 months

What this means

BIL departures beat the U.S. average.

  • 84.6% of the 4,578 scheduled departures from Billings (BIL) arrived at their destination on time, 9.0 points higher than the U.S. average of 75.6%.
  • 0.7% of departures were cancelled (U.S. average 1.9%), and 5.9% arrived an hour or more late.
  • Flights arriving at BIL were on time 82.4% of the time.
  • Among airlines with at least 300 departures, Delta Air Lines was the most punctual from BIL (92.2%) and Allegiant Air the least (81.6%).
  • Over the last 3 years, September was the most reliable month for departures from BIL (88.3% on time) and February the least reliable (77.3%).
  • Flights scheduled to depart 11 am to noon were the most punctual (93.2% on time); flights scheduled to depart 4 pm to 5 pm were the least (63.9%).

Airlines at BIL

Ranked by on-time arrival

Departures from BIL, September 2025 to August 2026. On time means arrived at the destination within 15 minutes of schedule.
AirlineOn timeCancelled 60+ min lateAvg delay when lateDepartures
Delta Air Lines 92.2%0.5% 3.2%117 min 730
SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska 83.5%1.1% 7.0%89 min 1,816
United Airlines 83.4%0.3% 6.2%85 min 725
Envoy AirSold as American Eagle 82.9%0.4% 5.1%72 min 997
Allegiant Air 81.6%0.3% 7.1%104 min 310

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On-time rate by departure hour

<6a 93.0%
6a 91.0%
7a 90.9%
8a Insufficient sample
9a Insufficient sample
10a 90.6%
11a 93.2%
12p 74.1%
1p 77.9%
2p 76.0%
3p Insufficient sample
4p 63.9%
5p 68.4%
6p 79.8%
7p Insufficient sample
8p Insufficient sample
9p Insufficient sample
10p Insufficient sample
Share of scheduled flights on time BIL average 84.6%
Departures from BIL by scheduled local departure hour, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing before 6 am 93.0% 658
Departing 6 am to 7 am 91.0% 746
Departing 7 am to 8 am 90.9% 383
Departing 8 am to 9 am Insufficient sample 4
Departing 9 am to 10 am Insufficient sample 28
Departing 10 am to 11 am 90.6% 437
Departing 11 am to noon 93.2% 400
Departing noon to 1 pm 74.1% 220
Departing 1 pm to 2 pm 77.9% 298
Departing 2 pm to 3 pm 76.0% 462
Departing 3 pm to 4 pm Insufficient sample 24
Departing 4 pm to 5 pm 63.9% 158
Departing 5 pm to 6 pm 68.4% 288
Departing 6 pm to 7 pm 79.8% 446
Departing 7 pm to 8 pm Insufficient sample 7
Departing 8 pm to 9 pm Insufficient sample 3
Departing 9 pm to 10 pm Insufficient sample 10
Departing 10 pm to 11 pm Insufficient sample 6

Best and worst months at BIL

Jan 80.5%
Feb 77.3%
Mar 83.9%
Apr 84.2%
May 83.6%
Jun 80.5%
Jul 78.4%
Aug 79.4%
Sep 88.3%
Oct 86.8%
Nov 85.4%
Dec 86.2%
Share of scheduled flights on time 12-month average 84.6%
Departures from BIL by calendar month, September 2023 to August 2026 pooled. Scale starts at zero.
Show as table
PeriodOn timeFlights
January 80.5% 976
February 77.3% 884
March 83.9% 1,013
April 84.2% 1,015
May 83.6% 1,108
June 80.5% 1,274
July 78.4% 1,326
August 79.4% 1,305
September 88.3% 1,086
October 86.8% 1,063
November 85.4% 942
December 86.2% 1,014

Month by month, last 12 months

Sep 86.0%
Oct 87.5%
Nov 84.9%
Dec 82.1%
Jan 88.0%
Feb 85.2%
Mar 84.7%
Apr 87.2%
May 89.0%
Jun 85.0%
Jul 80.5%
Aug 76.8%
Share of scheduled flights on time U.S. average 75.6%
Departures from BIL, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 86.0% 458
Oct 2025 87.5% 432
Nov 2025 84.9% 351
Dec 2025 82.1% 364
Jan 2026 88.0% 334
Feb 2026 85.2% 310
Mar 2026 84.7% 365
Apr 2026 87.2% 335
May 2026 89.0% 383
Jun 2026 85.0% 412
Jul 2026 80.5% 420
Aug 2026 76.8% 414

Busiest routes from BIL

Nonstop routes from BIL by scheduled flights, September 2025 to August 2026.
ToOn timeCancelledAirlinesFlights
Denver (DEN) 81.4%1.0%21,774
Salt Lake City (SLC) 90.5%0.6%21,074
Dallas/Fort Worth (DFW) 83.6%0.6%1687
Minneapolis (MSP) 90.7%0.8%1365
Chicago (ORD) 77.9%0.0%2258
Phoenix (AZA) 79.0%0.6%1181
Las Vegas (LAS) 85.3%0.0%1129
Phoenix (PHX) 90.9%0.0%1110
Airliner parked at a terminal gate
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Scheduled nonstop domestic departures from Billings, MT (BIL) by airlines that report to the DOT.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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