Carrier route record
MQORD→ATL
Envoy Air · Chicago to Atlanta
- Flights
- 366
- 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 ORD to ATL lands a B, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 366 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 2,623 at 80.4% on time.
Delta Air Lines is the most reliable of the four carriers covered here at 80.4% on time across 2,623 flights.
Key figures
On time
77.7%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
62 min
Across delayed arrivals only, not all flights
Cancelled
2.19%
National rate is 1.81%
Whole route
75.0%
Every carrier on ORD to ATL, 6,409 flights
These figures cover 366 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% 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 ORD to ATL
Envoy flew 366 of the 6,409 flights on ORD to ATL, about 6% of it. Its 77.7% on time is 3 points better than the route as a whole, which runs 75.0%. Ranked by on-time rate it is number three of nine carriers on the route, where the range runs from Delta at 80.4% to Spirit at 60.0%. Four of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 80.4% of the time; American Airlines manages 65.3%. Sample sizes sit next to every figure, because a two-point gap across 689 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 2,623 | 80.4% | 87 min | 2.36% | B |
| PSA Airlinesthin sample | 5 | 80.0% | 58 min | 0.00% | B+ |
| Envoy Air (this page) | 366 | 77.7% | 62 min | 2.19% | B |
| United Airlines | 1,611 | 74.7% | 68 min | 1.12% | C |
| Republic Airwaysthin sample | 287 | 72.1% | 63 min | 4.53% | C− |
| Frontier Airlines | 713 | 67.8% | 100 min | 3.09% | C− |
| American Airlines | 689 | 65.3% | 86 min | 3.05% | C− |
| SkyWest Airlinesthin sample | 40 | 61.5% | 93 min | 2.50% | D |
| Spirit Airlinesthin sample | 75 | 60.0% | 74 min | 0.00% | D+ |
Frontier Airlines cancels 3.1% 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 28 points, against 15 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am126 flights84.8%
- 8am–11am24 flights—
- 11am–2pm132 flights78.3%
- 2pm–5pm39 flights73.0%
- 5pm–8pm1 flights—
- 8pm–5am44 flights57.1%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 57.1% on time, against 84.8% for the 5am–8am 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 132 flights scheduled in it.
Across the year
Envoy on ORD to ATL through the year
- Jul–Sep 20252 flights—
- Oct–Dec 202597 flights74.5%
- Jan–Mar 2026210 flights77.1%
- Apr–Jun 202657 flights84.2%
Scale runs 65% 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 77.7% on time across 366 flights.
Quarter by quarter Envoy on ORD to ATL held fairly steady: 74.5% in Oct–Dec 2025, 77.1% in Jan–Mar 2026 and 84.2% in Apr–Jun 2026. A spread of 10 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
Across the week, Monday is the strongest day at 81.1% on time and Saturday the weakest at 74.4%. 7 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 4,923 reported delay minutes.
- 38%National Airspace System
- 36%Late-arriving aircraft
- 15%Extreme weather
- 11%Carrier
Extreme weather accounts for 15% 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 2.4 times the usual weather exposure. The split is drawn from 4,923 reported delay minutes.
36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 4,923 reported delay minutes here, that single category outweighs weather by 2 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.
Cancellations sit at 2.19% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
8.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
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 71.3% on time across 364 flights, 6 points below 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. 366 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 ATL
Put together: treat all of this as provisional. 366 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 77.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 358 completed flights over 12 months sit behind that.
Related
Where to go next
- ORD to ATL, every carrier
- Envoy on ATL to ORD, the return leg
- Delta Air Lines on ORD to ATL80.4%
- United Airlines on ORD to ATL74.7%
- Republic Airways on ORD to ATL72.1%
- Frontier Airlines on ORD to ATL67.8%
- American Airlines on ORD to ATL65.3%
- Envoy Air network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Same route, different airline: where the carrier you pick matters most
- Why the first flight of the morning is statistically safest
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.