Route on-time record
BOI to ORD: most on-time flights and the best time to fly
Boise (Boise Air Terminal/Gowen Field) to Chicago (Chicago O'Hare International Airport). 1,106 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was United 1105 at 8:34 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BOI → ORD
Boise to Chicago: 1,106 nonstop flights a year
On time (12 months)
76%
Cancelled
0.9%
avg delay 21 min
Best time to leave
Before 9 AM
85% on time vs 71% noon to 3 PM
Most reliable airline
SkyWest
82% 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 · United 1105
8:34 AM → 1:13 PM3h 39m nonstop
Local times, typical schedule. Last flown 2026-05-20.
87%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 95% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; Noon to 3 PM: 71%).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find United 1105 fares Opens this date on Aviasales#2 · SkyWest 5386 · sold as United Express, Delta Connection, American Eagle or Alaska
8:20 AM → 1:10 PM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 1.9%
- Avg arrival delay
- 10 min
- Arrived on time 85% of the time (306 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; Noon to 3 PM: 71%).
Strong track record · 306 flights
Find 8:20 AM flight fares Opens this date on Aviasales#3 · SkyWest 4806 · sold as United Express, Delta Connection, American Eagle or Alaska
12:04 PM → 4:54 PM3h 50m nonstop
Local times, typical schedule. Last flown 2026-05-20.
82%
chance on time
- On time (history)
- 83%
- Cancelled
- 1.2%
- Avg arrival delay
- 13 min
- Arrived on time 83% of the time (167 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 71% on time; Before 9 AM: 85%).
- Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 167 flights
Find 12:04 PM flight fares Opens this date on Aviasales#4 · United 451
12:38 PM → 5:12 PM3h 34m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 55%
- Cancelled
- 0.0%
- Avg arrival delay
- 59 min
- Arrived on time 55% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 71% on time; Before 9 AM: 85%).
- Lands inside ORD's trouble window: 44% of its 243 ground stops and delay programs started between 2 PM and 8 PM.
- 86% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 11 flights
Find United 451 fares Opens this date on Aviasales#5 · American 2340
3:11 PM → 8:04 PM3h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
65%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find American 2340 fares Opens this date on Aviasales#6 · Envoy 4324 · sold as American Eagle
1:31 PM → 6:11 PM3h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
65%
chance on time
- On time (history)
- 67%
- Cancelled
- 0.0%
- Avg arrival delay
- 33 min
- Arrived on time 67% of the time (213 flights, Jun 2025 to May 2026).
- Never cancelled in 214 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 71% on time; Before 9 AM: 85%).
- 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 · 213 flights
Find 1:31 PM flight fares Opens this date on Aviasales#7 · American 2116
1:29 PM → 6:16 PM3h 47m nonstop
Local times, typical schedule. Last flown 2026-05-20.
59%
chance on time
- On time (history)
- 61%
- Cancelled
- 0.0%
- Avg arrival delay
- 25 min
- Arrived on time 61% of the time (44 flights, Jun 2025 to May 2026).
- Never cancelled in 44 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 71% on time; Before 9 AM: 85%).
- 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 · 44 flights
Find American 2116 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)82%
506 flights · 84% on time as flown · 1.6% cancel
- United Airlines76%
244 flights · 77% on time as flown · 0.6% cancel
- Envoy Air (sold as American Eagle)68%
214 flights · 67% on time as flown · 0.4% cancel
- American Airlines66%
142 flights · 61% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM85%
384 flights · avg delay 12 min
- Noon to 3 PM71%
671 flights · avg delay 27 min
- 3 to 6 PM71%
49 flights · avg delay 17 min
Best day: Saturday (86%). Worst: Friday (76%).
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 aircraft34%
- Airline (crew, maintenance, boarding)27%
- Air traffic control and airport volume24%
- Severe weather14%
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
BOI to ORD questions
- What time of day is best to fly BOI to ORD?
- Before 9 AM: 85% of flights arrived on time, against 71% 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 BOI to ORD?
- SkyWest, with a season-adjusted 82% chance of operating and arriving on time over 506 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 BOI to ORD?
- July (75% on time); the best was February (88%), 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 BOI
- ORD to BOI (return)
- BOI to SEA 86%
- BOI to DEN 81%
- BOI to PHX 84%
- BOI to SLC 92%
- BOI to SFO 75%
- BOI to LAS 82%
- BOI to LAX 93%
- BOI to PDX 91%
- BOI to SAN 83%
- BOI to SMF 84%
- BOI to DFW 82%
- BOI to MSP 88%
Live status: FAA delays and ground stops