Route · MSO → ORD · 2020–2025 BTS data
Missoula to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MSO to ORD (Missoula to Chicago) ranks #4400 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 75.8%
- On-time
- -3.2 pts
- vs US avg
- 79 min
- Delay when late
- 1,132
- Flights
- #4400 of 4927
- Corpus placement
Cancelled
0.4%
Best Month
Sep 2021 89%
Worst Month
Jul 2025 63%
Distance
1,332 mi
Carriers
7
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 35 | 8 | 0 | 0 | OO,MQ |
| Sep 2025 | 73 | 16 | 1 | 1 | MQ,UA,OO |
| Aug 2025 | 89 | 27 | 0 | 4 | MQ,UA |
| Jul 2025 | 92 | 34 | 1 | 3 | UA,MQ |
| Jun 2025 | 81 | 15 | 0 | 0 | UA,MQ |
| Sep 2024 | 55 | 11 | 0 | 0 | OO,MQ |
| Aug 2024 | 62 | 15 | 0 | 1 | MQ,OO,UA |
| Jul 2024 | 62 | 20 | 0 | 1 | MQ,UA |
| Jun 2024 | 56 | 14 | 0 | 1 | MQ,UA |
| Aug 2023 | 62 | 15 | 0 | 0 | MQ,UA |
| Jul 2023 | 62 | 17 | 0 | 1 | MQ,UA |
| Jun 2023 | 59 | 10 | 1 | 0 | MQ,UA |
| Aug 2022 | 31 | 5 | 1 | 0 | OO |
| Jul 2022 | 31 | 4 | 0 | 0 | OO |
| Sep 2021 | 57 | 6 | 0 | 0 | UA,MQ,YX |
| Aug 2021 | 62 | 14 | 0 | 1 | UA,MQ |
| Jul 2021 | 61 | 20 | 0 | 0 | UA,MQ |
| Jun 2021 | 56 | 18 | 0 | 1 | UA,MQ,YX |
| Aug 2020 | 46 | 5 | 0 | 0 | MQ,OO,UA |
Cancellation Rate
0.4%
4 of 1,132 flights
Diversion Rate
1.2%
14 of 1,132 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
MSO - Missoula
Full on-time, delay-cause, and seasonal performance for Missoula, MT.
MSO on-time profileORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
ORD on-time profileCompare the two airports
See MSO and ORD side by side on delays, cancellations, and reliability.
Compare MSO vs ORDOrigin-hub reliability standing
Mid-pack among MSO departures
From MSO, this corridor sits with 6 other 75–85% on-time routes out of 8 tracked departures, not the hub's reliability leaders (2 at ≥85%) and not the softest ( 0 below 75%). Destination: Chicago · fleet on-time rank #4347 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to MSO–ORD.
Routes with a similar on-time rate
What the Data Says About MSO to ORD
The Missoula to Chicago corridor (MSO to ORD) posts a 75.8% on-time rate on the lower edge of the average band, based on 1,132 tracked flights. Late flights run 79.3 minutes behind on average. 7 carriers cover the 1,332-mile route; over the last 24 months, 4 of 1,132 flights were cancelled (0.4%) and 1.2% diverted.
The monthly split is wide on this route: Sep 2021 posted the strongest performance at 89% on-time, while Jul 2025 came in at just 63% - a 26-point swing worth factoring into travel timing.
On the multi-year calendar, MSO–ORD peaks in September at 82.2% on-time while June carries the heaviest traffic (~63 flights per month) ; the softest month is July at 69.2%, a 13.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does MSO to ORD rank among US routes by traffic? ▼
How often are flights delayed from MSO to ORD? ▼
What is the cancellation rate for MSO to ORD? ▼
How far is the flight from MSO to ORD? ▼
When is the best time to fly from MSO to ORD? ▼
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 MSO–ORD data
MSO–ORD is mid-pack at 75.8% on-time; month and carrier mix move more than the corridor headline.
- Compare MSO and ORD airport profiles: delay causes and top routes differ even on the same corridor. MSO airport
- If your dates flex, September (82.2% on-time) beats July (69.2%) on this corridor. Seasonal chart
- 4 other routes post a similar 75.8% 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.