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Route · BIL → ORD · 2020–2025 BTS data

Billings to Chicago

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BIL to ORD (Billings to Chicago) ranks #4779 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.5%
On-time
-0.5 pts
vs US avg
90 min
Delay when late
632
Flights
#4779 of 4927
Corpus placement

Cancelled

0.2%

Best Month

Oct 2025 85%

Worst Month

Jul 2025 70%

Distance

1,060 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2025 61 9 0 0 OO,MQ
Sep 2025 90 18 0 0 MQ,OO
Aug 2025 93 17 1 3 OO,MQ
Jul 2025 93 28 0 1 OO,MQ
Jun 2025 81 19 0 0 OO,MQ
Sep 2024 30 2 0 0 MQ
Aug 2024 31 5 0 1 MQ
Jul 2024 31 8 0 1 MQ
Jul 2023 31 9 0 0 MQ
Jun 2023 30 8 0 0 MQ
Jul 2022 31 7 0 0 MQ
Jul 2021 30 6 0 0 MQ

Cancellation Rate

0.2%

1 of 632 flights

Diversion Rate

0.9%

6 of 632 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 profile

ORD - Chicago

Full on-time, delay-cause, and seasonal performance for Chicago, IL.

ORD on-time profile

Compare the two airports

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

Compare BIL vs ORD

Origin-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: Chicago · fleet on-time rank #3662 of 4927.

What the Data Says About BIL to ORD

632 tracked flights put the BIL to ORD pairing (Billings to Chicago) at a 78.5% on-time rate, squarely in line with the wider network. Delays that do occur run 89.6 minutes on average. Across the 1,060-mile route and its 3 carriers, the trailing 24 months show 0.2% cancelled and 0.9% diverted (632 flights sampled).

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 85% on-time, while Jul 2025 came in at just 70% - a 15-point swing worth factoring into travel timing.

On the multi-year calendar, BIL–ORD peaks in October at 85.2% on-time while August carries the heaviest traffic (~62 flights per month) ; the softest month is July at 73.1%, a 12.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BIL to ORD rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BIL to ORD ranks #4779 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 BIL to ORD? ▼
Flights from Billings to Chicago have a 78.5% on-time rate based on 632 flights. The average delay is 89.6 minutes. The best recent month was Oct 2025 with 85% on-time.
What is the cancellation rate for BIL to ORD? ▼
Over the last 24 months, 0.2% of flights on this route were cancelled (1 of 632 flights) and 0.9% were diverted.
How far is the flight from BIL to ORD? ▼
The flight distance from Billings (BIL) to Chicago (ORD) is approximately 1,060 miles. This route is served by 3 carriers.
When is the best time to fly from BIL to ORD? ▼
The best recent month for on-time performance was Oct 2025 (85% on-time). The worst was Jul 2025 (70% on-time). Consider booking during months with historically better performance.

Airports on this route

BIL Airport

Billings
ORD Airport

Chicago
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–ORD data

BIL–ORD is mid-pack at 78.5% on-time; month and carrier mix move more than the corridor headline.

  • Compare BIL and ORD airport profiles: delay causes and top routes differ even on the same corridor. BIL airport
  • If your dates flex, October (85.2% on-time) beats July (73.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.5% 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.