Carrier route record
YXDLH→ORD
Republic Airways · Duluth to Chicago
- Flights
- 123
- Period
- September 2025 to August 2026
- Share of route
- 10%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on DLH to ORD sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 123 flights, with a median arrival 4 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Republic on DLH 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
75.2%
Arrivals under 15 minutes late, of 117 completed flights
Avg delay
89 min
Across delayed arrivals only, not all flights
Cancelled
4.07%
National rate is 1.89%
Whole route
69.0%
Every carrier on DLH to ORD, 1,239 flights
These figures cover 123 flights between September 2025 and August 2026. Beyond the headline rate, 12.8% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Republic against every carrier on DLH to ORD
Republic flew 123 of the 1,239 flights on DLH to ORD, about 10% of it. Its 75.2% on time is 6 points better than the route as a whole, which runs 69.0%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 75.2% to SkyWest at 68.3%.
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 Airways (this page)thin sample | 123 | 75.2% | 89 min | 4.07% | B− |
| SkyWest Airlines | 1,116 | 68.3% | 108 min | 4.84% | C− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Republic runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 123 flights.
- 5am–8am67 flights76.6%
- 8am–11am—
- 11am–2pm3 flights—
- 2pm–5pm32 flights71.0%
- 5pm–8pm21 flights—
- 8pm–5am—
Scale runs 65% to 80%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 76.6% on time for the 5am–8am window against 71.0% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 67 flights scheduled in it.
Across the year
Republic on DLH to ORD through the year
- Jan–Mar 20265 flights—
- Apr–Jun 202678 flights74.7%
- Jul–Sep 202640 flights78.4%
Scale runs 65% to 85%. 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 75.2% on time across 123 flights.
Split by quarter, Republic on DLH to ORD logged 5 flights in Jan–Mar 2026, 78 flights in Apr–Jun 2026 and 40 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 75.2% annual figure is the one to use.
Arrival by arrival
How late Republic on DLH to ORD runs when it is late
Republic on DLH to ORD often beats the schedule: 35 of 117 completed flights, 30%, arrived 15 minutes or more early. When Republic on DLH to ORD is late it tends to be very late: 15 of its 29 late arrivals were an hour or more behind, and 8 were two hours or more.
- 15+ min early35 flights29.9%
- Within 15 min53 flights45.3%
- 15–29 min late5 flights4.3%
- 30–59 min late9 flights7.7%
- 1–2 hours late7 flights6.0%
- 2+ hours late8 flights6.8%
Scale runs 0% to 100%.
Share of 117 completed flights by arrival against schedule.
Only 17 of 117 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for Republic on DLH to ORD
The latest arrival of the period was on 11 August 2026, 4 hours 31 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 |
|---|---|---|
| 11 August 2026 | 4 hours 31 minutes | Late-arriving aircraft |
| 2 April 2026 | 4 hours 16 minutes | National Airspace System |
| 25 August 2026 | 4 hours 1 minute | Late-arriving aircraft |
| 12 April 2026 | 3 hours 10 minutes | Late-arriving aircraft |
| 14 April 2026 | 2 hours 45 minutes | National Airspace System |
Delay causes
Why Republic runs late on this route
National Airspace System accounts for 47% of the 2,574 delay minutes carriers reported here, and the remaining four split what is left.
- 47%National Airspace System
- 37%Late-arriving aircraft
- 16%Carrier
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,574 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 2,574 reported delay minutes.
47% 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 1,215 minutes out of 2,574, against a national NAS share of 21%.
Cancellations run at 4.07%, against 1.89% 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
12.8% 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 5am–8am window matters as much as it does.
The return leg runs 76.7% on time across 124 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. 123 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 Republic on DLH to ORD
Put together: the delay figures matter less here than the 4.07% 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. 117 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.