Route on-time record
ORD to BZN: most on-time flights and the best time to fly
Chicago (Chicago O'Hare International Airport) to Bozeman (Bozeman Yellowstone International Airport). 1,240 nonstop flights in Jun 2025 to May 2026, 68% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was United 224 at 9:01 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
ORD → BZN
Chicago to Bozeman: 1,240 nonstop flights a year
On time (12 months)
68%
Cancelled
0.7%
avg delay 22 min
Best time to leave
Before 9 AM
77% on time vs 50% 6 to 9 PM
Most reliable airline
SkyWest
73% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 224
9:01 AM → 11:26 AM3h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.7%
- Avg arrival delay
- 10 min
- Arrived on time 79% of the time (269 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
Strong track record · 269 flights
Find United 224 fares Opens this date on Aviasales#2 · United 623
12:45 PM → 3:12 PM3h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- 71% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 623 fares Opens this date on Aviasales#3 · American 1639
1:44 PM → 4:02 PM3h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 1639 fares Opens this date on Aviasales#4 · American 1645
10:10 AM → 12:28 PM3h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as American 2528; its record covers all of them.
61%
chance on time
- On time (history)
- 56%
- Cancelled
- 0.0%
- Avg arrival delay
- 27 min
- Arrived on time 56% of the time (41 flights, Jun 2025 to May 2026).
- Never cancelled in 41 scheduled flights.
- Departs outside ORD's trouble window (2 PM to 8 PM, when 44% of its 243 ground stops and delay programs started).
- Short track record (41 flights), so its score leans on the airline's record at this hour.
Limited track record · 41 flights
Find American 1645 fares Opens this date on Aviasales#5 · United 533
7:41 PM → 10:12 PM3h 28m nonstop
Local times, typical schedule. Last flown 2026-05-31.
58%
chance on time
- On time (history)
- 61%
- Cancelled
- 0.0%
- Avg arrival delay
- 37 min
- Arrived on time 61% of the time (56 flights, Jun 2025 to May 2026).
- Never cancelled in 56 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 50% on time; Before 9 AM: 77%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 56 flights
Find United 533 fares Opens this date on Aviasales#6 · American 463
7:09 PM → 9:38 PM3h 29m nonstop
Local times, typical schedule. Last flown 2026-04-06.
47%
chance on time
- On time (history)
- 38%
- Cancelled
- 2.5%
- Avg arrival delay
- 54 min
- Arrived on time 38% of the time (39 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 50% on time; Before 9 AM: 77%).
- Departs inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (39 flights), so its score leans on the airline's record at this hour.
Limited track record · 39 flights
Find American 463 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)73%
111 flights · 77% on time as flown · 0.4% cancel
- United Airlines68%
628 flights · 69% on time as flown · 1.0% cancel
- American Airlines65%
460 flights · 64% on time as flown · 0.5% cancel
- Envoy Air (sold as American Eagle)63%
41 flights · 55% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM77%
113 flights · avg delay 11 min
- 9 AM to noon72%
680 flights · avg delay 18 min
- Noon to 3 PM66%
120 flights · avg delay 16 min
- 3 to 6 PM68%
102 flights · avg delay 24 min
- 6 to 9 PM50%
225 flights · avg delay 40 min
Best day: Tuesday (80%). Worst: Friday (66%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft46%
- Airline (crew, maintenance, boarding)27%
- Air traffic control and airport volume22%
- Severe weather6%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
ORD to BZN questions
- What time of day is best to fly ORD to BZN?
- Before 9 AM: 77% of flights arrived on time, against 50% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from ORD to BZN?
- SkyWest, with a season-adjusted 73% chance of operating and arriving on time over 111 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on ORD to BZN?
- July (63% on time); the best was November (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from ORD
- BZN to ORD (return)
- ORD to LGA 67%
- ORD to BOS 68%
- ORD to LAX 74%
- ORD to DFW 70%
- ORD to DCA 69%
- ORD to MCO 73%
- ORD to ATL 74%
- ORD to MSP 69%
- ORD to DEN 74%
- ORD to IAH 75%
- ORD to EWR 69%
- ORD to DTW 71%
Live status: FAA delays and ground stops