Route · ORD → MSO · 2020–2025 BTS data
Chicago to Missoula
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ORD to MSO (Chicago to Missoula) ranks #4404 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 82.5%
- On-time
- +3.5 pts
- vs US avg
- 64 min
- Delay when late
- 1,131
- Flights
- #4404 of 4927
- Corpus placement
Cancelled
0.2%
Best Month
Jun 2023 93%
Worst Month
Jul 2023 65%
Distance
1,332 mi
Carriers
7
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 34 | 5 | 0 | 0 | OO,MQ |
| Sep 2025 | 73 | 9 | 1 | 0 | MQ,UA,OO |
| Aug 2025 | 89 | 23 | 0 | 0 | MQ,UA |
| Jul 2025 | 92 | 23 | 1 | 0 | UA,MQ |
| Jun 2025 | 82 | 12 | 0 | 0 | UA,MQ |
| Sep 2024 | 55 | 8 | 0 | 0 | OO,MQ |
| Aug 2024 | 62 | 13 | 0 | 0 | MQ,OO,UA |
| Jul 2024 | 62 | 9 | 0 | 1 | MQ,UA |
| Jun 2024 | 56 | 14 | 0 | 1 | MQ,UA |
| Aug 2023 | 62 | 15 | 0 | 0 | MQ,UA |
| Jul 2023 | 62 | 22 | 0 | 0 | MQ,UA |
| Jun 2023 | 59 | 4 | 0 | 0 | MQ,UA |
| Aug 2022 | 31 | 3 | 0 | 0 | OO |
| Jul 2022 | 31 | 7 | 0 | 0 | OO |
| Sep 2021 | 57 | 5 | 0 | 0 | UA,MQ,YX |
| Aug 2021 | 62 | 7 | 0 | 0 | UA,MQ |
| Jul 2021 | 61 | 7 | 0 | 0 | UA,MQ |
| Jun 2021 | 55 | 9 | 0 | 0 | UA,MQ,YX |
| Aug 2020 | 46 | 3 | 0 | 0 | MQ,OO,UA |
Cancellation Rate
0.2%
2 of 1,131 flights
Diversion Rate
0.2%
2 of 1,131 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
ORD on-time profileMSO - Missoula
Full on-time, delay-cause, and seasonal performance for Missoula, MT.
MSO on-time profileCompare the two airports
See ORD and MSO side by side on delays, cancellations, and reliability.
Compare ORD vs MSOOrigin-hub reliability standing
Mid-pack among ORD departures
From ORD, this corridor sits with 147 other 75–85% on-time routes out of 168 tracked departures, not the hub's reliability leaders (10 at ≥85%) and not the softest ( 11 below 75%). Destination: Missoula · fleet on-time rank #2160 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to ORD–MSO.
Routes with a similar on-time rate
What the Data Says About ORD to MSO
Bureau of Transportation Statistics records show Chicago to Missoula (ORD to MSO) running a 82.5% on-time rate over 1,131 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 64.3 minutes. The 1,332-mile corridor is served by 7 carriers, and over the last 24 months 0.2% of 1,131 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Jun 2023 posted the strongest performance at 93% on-time, while Jul 2023 came in at just 65% - a 29-point swing worth factoring into travel timing.
On the multi-year calendar, ORD–MSO peaks in September at 88.1% on-time while June carries the heaviest traffic (~63 flights per month) ; the softest month is July at 77.9%, a 10.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ORD to MSO rank among US routes by traffic? ▼
How often are flights delayed from ORD to MSO? ▼
What is the cancellation rate for ORD to MSO? ▼
How far is the flight from ORD to MSO? ▼
When is the best time to fly from ORD to MSO? ▼
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 ORD–MSO data
ORD–MSO runs 3.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare ORD and MSO airport profiles: delay causes and top routes differ even on the same corridor. ORD airport
- If your dates flex, September (88.1% on-time) beats July (77.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 82.5% 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.
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.