Chicago (ORD) to Duluth (DLH): On-Time Performance
Data through July 2026
The calendar drives reliability on ORD–DLH. October 2024 flights landed on schedule 90% of the time, but December 2025 dropped to 41% — a gap of 49 points. Across the full period the route averages 70% on-time against a national 78%. Morning departures also hold up better than evening ones (75% vs 64%), which matters most in the rough months.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 2.6%
- Flights/day
- 3.4
- last 12 months
- Duration
- 1h 46m
- scheduled
- Distance
- 397 mi
Best airline from ORD to DLH
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 85% | 12 min | 1.6% | 443 |
| SkyWest Airlines | 66% | 26 min | 2.9% | 1,980 |
Monthly on-time trend
Best time to fly from ORD to DLH
Aim for departures around 9 a.m. (80% on-time); avoid 7 p.m. departures (54%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 69% | 29 min |
| Tuesdaybest | 74% | 24 min |
| Wednesday | 70% | 24 min |
| Thursday | 71% | 22 min |
| Friday | 64% | 26 min |
| Saturday | 73% | 17 min |
| Sunday | 69% | 24 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations38%
- National airspace system17%
- Weather11%
Frequently asked questions
- How often are flights from ORD to DLH delayed?
- 30% of ORD–DLH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 24 minutes.
- Which airline is most reliable from ORD to DLH?
- Republic Airways has the best on-time record on this route at 85%, based on 443 flights. 2 airlines flew ORD–DLH frequently enough to compare in this period.
- What is the best time of day to fly from ORD to DLH?
- Departures around 9 a.m. have the best record (80% on-time), while departures around 7 p.m. have the worst (54%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to DLH?
- The scheduled ORD–DLH flight time averages 1h 46m over 397 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are ORD to DLH flights cancelled?
- 2.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from ORD to DLH?
- December 2025 was the roughest month in this dataset, with only 41% of arrivals on time. The best was October 2024 at 90%. If your dates are flexible, that 49-point gap is worth planning around.
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Based on 2,423 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.