Carrier route record
OODLH→ORD
SkyWest Airlines · Duluth to Chicago
- Flights
- 1,116
- Period
- September 2025 to August 2026
- Share of route
- 90%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on DLH to ORD carries a cancellation problem, not just a delay problem: 4.8% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, about seven flights in ten 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 1,116 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.3%, so SkyWest on DLH to ORD runs 9 points behind the country as a whole. Across a thousand flights that is about 90 extra late arrivals.
Key figures
On time
68.3%
Arrivals under 15 minutes late, of 1,058 completed flights
Avg delay
108 min
Across delayed arrivals only, not all flights
Cancelled
4.84%
National rate is 1.89%
Whole route
69.0%
Every carrier on DLH to ORD, 1,239 flights
These figures cover 1,116 flights between September 2025 and August 2026. Beyond the headline rate, 14.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on DLH to ORD
SkyWest flew 1,116 of the 1,239 flights on DLH to ORD, most of the route. Its 68.3% on time is about level with the route as a whole at 69.0%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Republic at 75.2% to SkyWest at 68.3%. One 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 |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 123 | 75.2% | 89 min | 4.07% | B− |
| SkyWest Airlines (this page) | 1,116 | 68.3% | 108 min | 4.84% | C− |
Flight by flight
SkyWest flight numbers on DLH to ORD
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Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against half a point between the best and worst carrier.
- 5am–8am172 flights79.2%
- 8am–11am228 flights81.7%
- 11am–2pm290 flights66.9%
- 2pm–5pm328 flights57.9%
- 5pm–8pm98 flights55.3%
- 8pm–5am—
Scale runs 45% to 85%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 55.3% on time, against 81.7% 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 2pm–5pm window is the busiest, with 328 flights scheduled in it.
Across the year
SkyWest on DLH to ORD through the year
October is the best month on the calendar at 82.6% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. May was the busiest month here, with 135 flights.
Across the week, Tuesday is the strongest day at 75.8% on time and Friday the weakest at 64.3%, a spread of 12 points.
Arrival by arrival
How late SkyWest on DLH to ORD runs when it is late
The 335 late arrivals split 97 under half an hour, 89 between 30 and 60 minutes, and 149 an hour or more.
- 15+ min early218 flights20.6%
- Within 15 min505 flights47.7%
- 15–29 min late97 flights9.2%
- 30–59 min late89 flights8.4%
- 1–2 hours late66 flights6.2%
- 2+ hours late83 flights7.8%
Scale runs 0% to 100%.
Share of 1,058 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 260 departures that left 15 minutes late or more, only 23 made it up before arrival. In the other direction, 98 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 ORD.
The worst days
Worst days for SkyWest on DLH to ORD
The latest arrival of the period was on 22 January 2026, 19 hours 36 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in April 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 22 January 2026 | 19 hours 36 minutes | Late-arriving aircraft |
| 14 April 2026 | 18 hours 39 minutes | Carrier |
| 12 March 2026 | 15 hours 57 minutes | Extreme weather |
| 2 April 2026 | 15 hours 43 minutes | Extreme weather |
| 23 April 2026 | 14 hours 10 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest 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 36,000 reported delay minutes.
- 35%Late-arriving aircraft
- 29%Carrier
- 23%National Airspace System
- 13%Extreme weather
Extreme weather accounts for 13% 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 2.2 times the usual weather exposure. The split is drawn from 36,000 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 36,000 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 4.84%, against 1.89% nationally. That is about one flight in twenty 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
14.1% 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.
At 397 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 64.0% on time across 1,114 flights, 4 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 4 points of difference.
The sample behind these figures is 1,116 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking SkyWest on DLH to ORD
Put together: the delay figures matter less here than the 4.84% cancellation rate. A late arrival costs you close to two hours; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 1,058 completed flights over 12 months sit behind that.
Related
Where to go next
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.