Carrier route record
MQORD→BOI
Envoy Air · Chicago to Boise
- Flights
- 152
- Period
- September 2025 to August 2026
- Share of route
- 14%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on ORD to BOI draws a D+. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is roughly 50 minutes behind schedule. Build slack into anything you connect to. That rests on 152 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.3%, so Envoy on ORD to BOI runs 14 points behind the country as a whole. Across a thousand flights that is about 144 extra late arrivals.
Key figures
On time
62.9%
Arrivals under 15 minutes late, of 151 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
69.3%
Every carrier on ORD to BOI, 1,108 flights
These figures cover 152 flights between September 2025 and August 2026. Beyond the headline rate, 10.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Envoy against every carrier on ORD to BOI
Envoy flew 152 of the 1,108 flights on ORD to BOI, about 14% of it. Its 62.9% on time is 6 points worse than the route as a whole, which runs 69.3%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from American at 78.4% to Envoy at 62.9%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlinesthin sample | 208 | 78.4% | 62 min | 0.00% | B+ |
| United Airlinesthin sample | 245 | 77.4% | 58 min | 0.41% | B+ |
| SkyWest Airlines | 503 | 63.4% | 82 min | 3.18% | D− |
| Envoy Air (this page)thin sample | 152 | 62.9% | 51 min | 0.00% | D+ |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Envoy runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 152 flights.
There are not enough flights in each departure window to split Envoy's ORD to BOI record by time of day without the percentages moving on noise. The headline rate of 62.9% is the reliable figure here.
Across the year
Envoy on ORD to BOI through the year
- Oct–Dec 202557 flights55.4%
- Jan–Mar 202689 flights65.2%
- Apr–Jun 20266 flights—
Scale runs 45% to 70%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 62.9% on time across 152 flights.
Split by quarter, Envoy on ORD to BOI logged 57 flights in Oct–Dec 2025, 89 flights in Jan–Mar 2026 and 6 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 62.9% annual figure is the one to use.
Arrival by arrival
How late Envoy on ORD to BOI runs when it is late
Envoy on ORD to BOI often beats the schedule: 42 of 151 completed flights, 28%, arrived 15 minutes or more early. The 56 late arrivals split 20 under half an hour, 20 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early42 flights27.8%
- Within 15 min53 flights35.1%
- 15–29 min late20 flights13.2%
- 30–59 min late20 flights13.2%
- 1–2 hours late13 flights8.6%
- 2+ hours late3 flights2.0%
Scale runs 0% to 100%.
Share of 151 completed flights by arrival against schedule.
5 of 41 late departures made up the time and arrived on time, 12% of them. In the other direction, 20 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BOI.
The worst days
Worst days for Envoy on ORD to BOI
The latest arrival of the period was on 30 November 2025, 2 hours 14 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 November 2025 | 2 hours 14 minutes | Extreme weather |
| 16 January 2026 | 2 hours 13 minutes | Late-arriving aircraft |
| 22 December 2025 | 2 hours 11 minutes | Late-arriving aircraft |
| 23 January 2026 | 1 hour 56 minutes | Extreme weather |
| 16 November 2025 | 1 hour 55 minutes | Late-arriving aircraft |
Delay causes
Why Envoy runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,877 reported delay minutes.
- 37%National Airspace System
- 35%Late-arriving aircraft
- 17%Extreme weather
- 11%Carrier
Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.8 times the usual weather exposure. The split is drawn from 2,877 reported delay minutes.
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,877 reported delay minutes here, that single category outweighs weather by 2 to one.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
10.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 1,437 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg runs 63.8% on time across 152 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 152 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Envoy on ORD to BOI
Put together: treat all of this as provisional. 152 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 62.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 151 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to BOI, every carrier
- Envoy on BOI to ORD, the return leg
- American Airlines on ORD to BOI78.4%
- United Airlines on ORD to BOI77.4%
- SkyWest Airlines on ORD to BOI63.4%
- Envoy Air network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.