Route Reliability
Missoula → Chicago
MSO–ORD · 1,332 miles · Missoula Montana Airport to Chicago O'Hare International Airport
- 73%
- Arrive within 15 minutes
- 12 min
- Average arrival delay
- 0.5%
- Cancelled
- 546
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.American Airlines74%394 flights
- 2.United Airlines73%152 flights
What the data says
Morning-you made the right choice.
MSO–ORD flights departing between 3–6 AM arrived on time 90% of the time, versus 70% between 12–3 PM.
Friday is doing you no favors.
MSO–ORD flights arrived on time 83% of the time on Thursdays and just 62% on Fridays. That gap is worth planning around.
Not much between American Airlines and United Airlines.
On this route they all land within 73% to 74% on time. Pick on schedule and price.
Trending in the right direction.
MSO–ORD flights arrived on time 79% of the time over the last three months in the data, compared with 61% in the three months before that.
Flights on this route
The breakdown
- Mon68%(75 flights)
- Tue81%(74 flights)
- Wed74%(74 flights)
- Thu83%(77 flights)
- Fri62%(79 flights)
- Sat79%(75 flights)
- Sun67%(78 flights)
- 3–6 AM90%(51 flights)
- 6–9 AM83%(63 flights)
- 12–3 PM70%(418 flights)
Jun 83% → May 95% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 81 |
| July 2025 | 61% | 88 |
| August 2025 | 71% | 85 |
| September 2025 | 78% | 71 |
| October 2025 | 77% | 35 |
| December 2025 | 43% | 14 |
| January 2026 | 68% | 31 |
| February 2026 | 71% | 28 |
| March 2026 | 65% | 31 |
| April 2026 | 79% | 28 |
| May 2026 | 95% | 40 |
Keep nerding
Based on 546 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.