MSO to ORD flight delays & on-time performance
Nonstop flights from Missoula Montana Airport to Chicago O'Hare International Airport · 1,332 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MSO or ORD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Missoula (MSO) to Chicago (ORD) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.8% were cancelled, and 10% arrived an hour or more late.
- United Airlines was the most punctual airline here (79% on time); SkyWest Airlines was the least (73%).
- Departures scheduled around 6am did best (85% on time); around 12pm did worst (73%).
- Thursday was the most reliable day to fly (87% on time) and Friday the least (65%).
- The largest source of delay minutes was late-arriving aircraft (41%).
Which airline is most on time from MSO to ORD?
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 | 79% | 2.9% | 22 min | 9.3% | 104 |
| Envoy AirRegional airline operating American Eagle flights. | 74% | 0.0% | 22 min | 10.9% | 343 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 73% | 1.9% | 23 min | 7.7% | 53 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am85%53 flights
- 12pm73%210 flights
- 1pm73%226 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%1.4% cancelled
- Tuesday79%0.0% cancelled
- Wednesday79%0.0% cancelled
- Thursday87%1.4% cancelled
- Friday65%1.3% cancelled
- Saturday76%1.4% cancelled
- Sunday69%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.
- Late-arriving aircraft41%
- Air traffic control & airport congestion41%
- Airline (crew, maintenance, cleaning, fueling)15%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)50%
- Extreme weather50%
- Air traffic control & airport congestion0%
- Security0%
MSO to ORD: common questions
- How often are MSO to ORD flights on time?
- 75% 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 Missoula to Chicago cancelled?
- 0.8% of scheduled flights were cancelled (4 of 500).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 84 min behind schedule on average, and 10.3% of flights were an hour or more late.
- How long is taxi time at MSO?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to MSO — 80% on time
More flights from Missoula
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MSO → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.