Carrier route record
MQTUL→ORD
Envoy Air · Tulsa to Chicago
- Flights
- 836
- Period
- July 2025 to June 2026
- Share of route
- 39%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on TUL to ORD carries a cancellation problem, not just a delay problem: 3.2% 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 B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 836 flights, with a median arrival 9 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate Envoy on TUL 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
75.9%
Arrivals under 15 minutes late, of 808 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
3.23%
National rate is 1.81%
Whole route
76.1%
Every carrier on TUL to ORD, 2,155 flights
These figures cover 836 flights between July 2025 and June 2026. Beyond the headline rate, 9.4% 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 TUL to ORD
Envoy flew 836 of the 2,155 flights on TUL to ORD, about 39% of it. Its 75.9% on time is about level with the route as a whole at 76.1%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from United at 84.8% to PSA at 56.8%. Three 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 |
|---|---|---|---|---|---|
| United Airlinesthin sample | 46 | 84.8% | 109 min | 0.00% | B+ |
| Republic Airwaysthin sample | 63 | 81.0% | 61 min | 7.94% | B− |
| SkyWest Airlines | 1,057 | 78.4% | 101 min | 1.61% | B |
| Envoy Air (this page) | 836 | 75.9% | 71 min | 3.23% | B− |
| PSA Airlinesthin sample | 153 | 56.8% | 119 min | 3.27% | D− |
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 17 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–8am162 flights80.7%
- 8am–11am199 flights79.1%
- 11am–2pm126 flights79.5%
- 2pm–5pm41 flights85.0%
- 5pm–8pm306 flights68.3%
- 8pm–5am2 flights—
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 2pm–5pm slot at 85.0% on time, ahead of 5pm–8pm at 68.3%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 5pm–8pm window is the busiest, with 306 flights scheduled in it.
Across the year
Envoy on TUL to ORD through the year
Delays peak in October, when the on-time rate falls to 67.6%. February is the strongest month at 83.6%. Moving a flexible trip across that boundary buys 16 points. March was the busiest month here, with 93 flights.
Across the week, Wednesday is the strongest day at 79.0% on time and Thursday the weakest at 68.1%. 11 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 14,000 reported delay minutes.
- 36%Late-arriving aircraft
- 30%National Airspace System
- 21%Extreme weather
- 12%Carrier
- 1%Security
Extreme weather accounts for 21% 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 3.4 times the usual weather exposure. The split is drawn from 13,814 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 14,000 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 3.23%, against 1.81% nationally. That is about one flight in 30 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. 9.4% 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 585 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 73.8% on time across 838 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. 836 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 TUL to ORD
Put together: the delay figures matter less here than the 3.23% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 808 completed flights over 12 months sit behind that.
Related
Where to go next
- TUL to ORD, every carrier
- Envoy on ORD to TUL, the return leg
- SkyWest Airlines on TUL to ORD78.4%
- PSA Airlines on TUL to ORD56.8%
- Envoy Air network-wide record
- 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.