Best Time to Fly ORD to DLH: On-Time Stats by Hour & Airline
Chicago O'Hare International → Duluth International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 65.0% of Chicago (ORD) to Duluth (DLH) flights arrived on time (1,223 scheduled flights). That is 12.7 points below the national average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 77.6%, while SkyWest Airlines trailed at 64.1%.
October has been the best month (82% on time) and Friday the weakest day of the week (64%).
4.4% of flights were cancelled, versus 1.8% nationally.
ORD to DLH on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 77.6% | 95 min | 7.2% | 83 |
| SkyWest Airlines | 64.1% | 78 min | 4.2% | 1,140 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to DLH
On-time arrival % by scheduled departure hour (local time), 2,329 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 73.1% | 2.2% | 401 |
| 9am–10am | 79.8% | 1.2% | 160 |
| 12pm–1pm | 74.6% | 1.4% | 729 |
| 3pm–4pm | 65.5% | 3.4% | 147 |
| 4pm–5pm | 61.2% | 5.6% | 143 |
| 7pm–8pm | 48.1% | 0.0% | 53 |
| 8pm–9pm | 65.1% | 2.7% | 589 |
| 9pm–10pm | 63.8% | 12.1% | 91 |
| 10pm–11pm | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to DLH
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 60.0% | -9.9 pts | 10.3% | 39 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.9% | +2.0 pts | 5.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 70.1% | +0.2 pts | 2.7% | 450 |
| All other days | 69.9% | — | 2.5% | 1,780 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).