Carrier route record
MQATL→ORD
Envoy Air · Atlanta to Chicago
- Flights
- 364
- Period
- July 2025 to June 2026
- Share of route
- 6%
- Carriers
- 9
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on ATL to ORD sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 364 flights. The strongest carrier on the route with a full sample, United Airlines, flew 1,611 at 74.3% on time.
United Airlines is the most reliable of the four carriers covered here at 74.3% on time across 1,611 flights.
Key figures
On time
71.3%
Arrivals under 15 minutes late, of 356 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.20%
National rate is 1.81%
Whole route
70.6%
Every carrier on ATL to ORD, 6,406 flights
These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 12.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Envoy against every carrier on ATL to ORD
Envoy flew 364 of the 6,406 flights on ATL to ORD, about 6% of it. Its 71.3% on time is about level with the route as a whole at 70.6%. Ranked by on-time rate it is number seven of nine carriers on the route, where the range runs from PSA at 100.0% to Frontier at 62.8%. Four of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. United Airlines arrives on time 74.3% of the time; Frontier Airlines manages 62.8%. Sample sizes sit next to every figure, because a two-point gap across 711 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PSA Airlinesthin sample | 5 | 100.0% | — | 0.00% | A+ |
| SkyWest Airlinesthin sample | 40 | 84.2% | 88 min | 5.00% | B− |
| Spirit Airlinesthin sample | 75 | 83.8% | 38 min | 0.00% | B+ |
| United Airlines | 1,611 | 74.3% | 92 min | 1.55% | C |
| Republic Airwaysthin sample | 287 | 72.4% | 65 min | 5.92% | C− |
| American Airlines | 688 | 72.2% | 98 min | 3.05% | C− |
| Envoy Air (this page)thin sample | 364 | 71.3% | 83 min | 2.20% | C |
| Delta Air Lines | 2,625 | 69.1% | 63 min | 2.21% | C |
| Frontier Airlines | 711 | 62.8% | 111 min | 2.67% | D |
American Airlines cancels 3.0% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Departure window
When Envoy runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 39 points, against 12 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am43 flights85.7%
- 8am–11am44 flights86.4%
- 11am–2pm107 flights79.2%
- 2pm–5pm98 flights64.6%
- 5pm–8pm36 flights52.9%
- 8pm–5am36 flights47.1%
Scale runs 40% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 47.1% on time, against 86.4% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 11am–2pm window is the busiest, with 107 flights scheduled in it.
Across the year
Envoy on ATL to ORD through the year
- Jul–Sep 20252 flights—
- Oct–Dec 202595 flights56.5%
- Jan–Mar 2026210 flights74.6%
- Apr–Jun 202657 flights82.5%
Scale runs 50% to 90%. 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 71.3% on time across 364 flights.
Envoy on ATL to ORD did not run the same all year. Its best quarter was Apr–Jun 2026 at 82.5% on time and its weakest Oct–Dec 2025 at 56.5%, a swing of 26 points on roughly 121 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Saturday is the strongest day at 80.0% on time and Friday the weakest at 59.2%. 21 points is a smaller lever than departure hour, but it is free.
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 8,416 reported delay minutes.
- 39%National Airspace System
- 31%Late-arriving aircraft
- 26%Carrier
- 3%Extreme weather
- 0%Security
39% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,316 minutes out of 8,416, against a national NAS share of 21%. The split is drawn from 8,416 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 86.4% on time here.
Cancellations sit at 2.20% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 606 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 77.7% on time across 366 flights, 6 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
One caution: this is a thin sample. 364 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 ATL to ORD
Put together: treat all of this as provisional. 364 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 71.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 356 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to ORD, every carrier
- Envoy on ORD to ATL, the return leg
- United Airlines on ATL to ORD74.3%
- Republic Airways on ATL to ORD72.4%
- American Airlines on ATL to ORD72.2%
- Delta Air Lines on ATL to ORD69.1%
- Frontier Airlines on ATL to ORD62.8%
- Envoy Air network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- Same route, different airline: where the carrier you pick matters most
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.