Carrier route record
MQBWI→ORD
Envoy Air · Baltimore to Chicago
- Flights
- 903
- Period
- July 2025 to June 2026
- Share of route
- 34%
- Carriers
- 8
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on BWI to ORD carries a cancellation problem, not just a delay problem: 3.8% of scheduled flights never operate, against 1.8% nationally. Of the ones that do fly, close to three flights in four arrive on time, worth a C− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 903 flights, with a median arrival 7 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate Envoy on BWI to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
74.7%
Arrivals under 15 minutes late, of 866 completed flights
Avg delay
85 min
Across delayed arrivals only, not all flights
Cancelled
3.77%
National rate is 1.81%
Whole route
74.9%
Every carrier on BWI to ORD, 2,690 flights
These figures cover 903 flights between July 2025 and June 2026. Beyond the headline rate, 11.3% 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 BWI to ORD
Envoy flew 903 of the 2,690 flights on BWI to ORD, about 34% of it. Its 74.7% on time is about level with the route as a whole at 74.9%. Ranked by on-time rate it is number five of eight carriers on the route, where the range runs from Southwest at 85.4% to American at 38.5%. Six 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 |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 124 | 85.4% | 50 min | 0.81% | A+ |
| Republic Airwaysthin sample | 274 | 83.0% | 88 min | 2.92% | B |
| Spirit Airlinesthin sample | 23 | 82.6% | 96 min | 0.00% | B+ |
| United Airlines | 1,148 | 75.1% | 88 min | 1.31% | B |
| Envoy Air (this page) | 903 | 74.7% | 85 min | 3.77% | C− |
| Frontier Airlinesthin sample | 150 | 64.3% | 177 min | 4.00% | D− |
| SkyWest Airlinesthin sample | 42 | 43.9% | 158 min | 2.38% | F |
| American Airlinesthin sample | 26 | 38.5% | 81 min | 0.00% | F+ |
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 32 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am258 flights89.3%
- 8am–11am43 flights88.1%
- 11am–2pm221 flights78.7%
- 2pm–5pm11 flights—
- 5pm–8pm290 flights57.6%
- 8pm–5am80 flights70.1%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 57.6% on time, against 89.3% 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 5pm–8pm window is the busiest, with 290 flights scheduled in it.
Across the year
Envoy on BWI to ORD through the year
December is the weak month at 58.3% on time, against 92.9% in June. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. November was the busiest month here, with 107 flights.
Across the week, Saturday is the strongest day at 84.4% on time and Thursday the weakest at 70.1%. 14 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 19,000 reported delay minutes.
- 39%Late-arriving aircraft
- 27%National Airspace System
- 18%Extreme weather
- 16%Carrier
- 0%Security
Extreme weather accounts for 18% 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 18,599 reported delay minutes.
39% 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 19,000 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 run at 3.77%, against 1.81% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
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. 11.3% 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 622 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 runs 76.4% on time across 903 flights, within 2 points 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. 903 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 BWI to ORD
Put together: the delay figures matter less here than the 3.77% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 866 completed flights over 12 months sit behind that.
Related
Where to go next
- BWI to ORD, every carrier
- Envoy on ORD to BWI, the return leg
- Southwest Airlines on BWI to ORD85.4%
- Republic Airways on BWI to ORD83.0%
- United Airlines on BWI to ORD75.1%
- Frontier Airlines on BWI to ORD64.3%
- Envoy Air network-wide record
- Baltimore/Washington International Thurgood Marshall (BWI) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- 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.