Route on-time record
BIL to ORD: most on-time flights and the best time to fly
Billings (Billings Logan International Airport) to Chicago (Chicago O'Hare International Airport). 430 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.2% were cancelled. The most reliable flight number was Envoy 3428 at 12:42 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BIL → ORD
Billings to Chicago: 430 nonstop flights a year
On time (12 months)
78%
Cancelled
0.2%
avg delay 22 min
Best time to leave
9 AM to noon
90% on time vs 72% noon to 3 PM
Most reliable airline
Envoy
78% chance on time
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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 · Envoy 3428 · sold as American Eagle
12:42 PM → 4:44 PM3h 02m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 91% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 72% on time; 9 AM to noon: 90%).
- Lands inside ORD's trouble window: 43% of its 237 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 11 flights
Find 12:42 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Envoy Air (sold as American Eagle)78%
283 flights · 78% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
123 flights · avg delay 27 min
- 9 AM to noon90%
31 flights · avg delay 17 min
- Noon to 3 PM72%
276 flights · avg delay 20 min
Best day: Tuesday (85%). Worst: Wednesday (70%).
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
- Airline (crew, maintenance, boarding)67%
- Air traffic control and airport volume16%
- Late-arriving aircraft13%
- 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
BIL to ORD questions
- What time of day is best to fly BIL to ORD?
- 9 AM to noon: 90% of flights arrived on time, against 72% for departures noon to 3 PM.
- Which airline is most on time from BIL to ORD?
- Envoy, with a season-adjusted 78% chance of operating and arriving on time over 283 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.
- 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 BIL
- ORD to BIL (return)
- BIL to DEN 80%
- BIL to SLC 92%
- BIL to DFW 84%
- BIL to MSP 90%
Live status: FAA delays and ground stops