ORD to MSO flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Missoula Montana Airport · 1,332 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD or MSO right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (ORD) to Missoula (MSO) arrived on time 80% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 6% arrived an hour or more late.
- United Airlines was the most punctual airline here (89% on time); Envoy Air was the least (76%).
- Departures scheduled around 8am did best (89% on time); around 8pm did worst (70%).
- Tuesday was the most reliable day to fly (89% on time) and Monday the least (71%).
- The largest source of delay minutes was air traffic control & airport congestion (27%).
Which airline is most on time from ORD to MSO?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 89% | 1.0% | 7 min | 2.9% | 104 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 82% | 1.9% | 11 min | 5.9% | 53 |
| Envoy AirRegional airline operating American Eagle flights. | 76% | 0.0% | 14 min | 6.5% | 342 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am89%152 flights
- 9am76%278 flights
- 8pm70%53 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%0.0% cancelled
- Tuesday89%0.0% cancelled
- Wednesday86%0.0% cancelled
- Thursday81%0.0% cancelled
- Friday72%1.4% cancelled
- Saturday86%1.4% cancelled
- Sunday73%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion27%
- Late-arriving aircraft25%
- Extreme weather24%
- Airline (crew, maintenance, cleaning, fueling)23%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
ORD to MSO: common questions
- How often are ORD to MSO flights on time?
- 80% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Missoula cancelled?
- 0.4% of scheduled flights were cancelled (2 of 499).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 55 min behind schedule on average, and 5.7% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 29 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MSO to ORD — 75% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ORD → MSO, nonstop flights by US airlines that report to the DOT. How we calculate this.