Route on-time record
BZN to ORD: most on-time flights and the best time to fly
Bozeman (Bozeman Yellowstone International Airport) to Chicago (Chicago O'Hare International Airport). 1,239 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was United 1693 at 8:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BZN → ORD
Bozeman to Chicago: 1,239 nonstop flights a year
On time (12 months)
75%
Cancelled
1.0%
avg delay 23 min
Best time to leave
Before 9 AM
88% on time vs 69% noon to 3 PM
Most reliable airline
United
80% 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 1693
8:00 AM → 12:03 PM3h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.9%
- Avg arrival delay
- 9 min
- Arrived on time 87% of the time (110 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; Noon to 3 PM: 69%).
Moderate track record · 110 flights
Find United 1693 fares Opens this date on Aviasales#2 · American 464
7:00 AM → 11:11 AM3h 11m nonstop
Local times, typical schedule. Last flown 2026-04-06.
80%
chance on time
- On time (history)
- 84%
- Cancelled
- 2.6%
- Avg arrival delay
- 21 min
- Arrived on time 84% of the time (38 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 88% on time; Noon to 3 PM: 69%).
- Short track record (38 flights), so its score leans on the airline's record at this hour.
Limited track record · 38 flights
Find American 464 fares Opens this date on Aviasales#3 · United 2202
12:35 PM → 4:45 PM3h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 79%
- Cancelled
- 0.7%
- Avg arrival delay
- 18 min
- Arrived on time 79% of the time (272 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 69% on time; Before 9 AM: 88%).
- Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 272 flights
Find United 2202 fares Opens this date on Aviasales#4 · United 1744
4:25 PM → 8:40 PM3h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- 80% 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 1744 fares Opens this date on Aviasales#5 · American 3177
12:26 PM → 4:51 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 69% on time; Before 9 AM: 88%).
- Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 3177 fares Opens this date on Aviasales#6 · American 1639
4:57 PM → 9:25 PM3h 28m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- 93% 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 American 1639 fares Opens this date on Aviasales#7 · American 961
1:36 PM → 5:45 PM3h 09m nonstop
Local times, typical schedule. Last flown 2026-04-06.
54%
chance on time
- On time (history)
- 55%
- Cancelled
- 0.0%
- Avg arrival delay
- 35 min
- Arrived on time 55% of the time (29 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 69% on time; Before 9 AM: 88%).
- Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 29 flights
Find American 961 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines80%
628 flights · 81% on time as flown · 1.3% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)75%
111 flights · 76% on time as flown · 0.6% cancel
- Envoy Air (sold as American Eagle)74%
41 flights · 76% on time as flown · 0.8% cancel
- American Airlines65%
459 flights · 65% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM88%
328 flights · avg delay 9 min
- 9 AM to noon75%
101 flights · avg delay 18 min
- Noon to 3 PM69%
660 flights · avg delay 30 min
- 3 to 6 PM70%
150 flights · avg delay 27 min
Best day: Tuesday (81%). Worst: Sunday (73%).
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 aircraft43%
- Air traffic control and airport volume29%
- Airline (crew, maintenance, boarding)24%
- Severe weather4%
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
BZN to ORD questions
- What time of day is best to fly BZN to ORD?
- Before 9 AM: 88% of flights arrived on time, against 69% for departures noon to 3 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 BZN to ORD?
- United, with a season-adjusted 80% chance of operating and arriving on time over 628 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 BZN to ORD?
- July (66% on time); the best was May (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 BZN
- ORD to BZN (return)
- BZN to DEN 76%
- BZN to SEA 84%
- BZN to SLC 91%
- BZN to MSP 88%
- BZN to DFW 72%
- BZN to LAS 82%
- BZN to LAX 88%
- BZN to ATL 85%
- BZN to SFO 78%
- BZN to EWR 71%
Live status: FAA delays and ground stops