BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
ORDDLH

Chicago, IL (ORD) to Duluth, MN (DLH) flight delay odds

Historically, 61.8% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,216 flights.

HISTORICAL ROUTE SIGNALVariable
61.8%arrived on time
23.6%30+ min late
3.9%cancelled
1,216scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late13.6%all scheduled flights
120+ minutes late6.2%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+23.1 mincompleted flights

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

Departure windowFlightsOn time30+ minCancelled
Early morning24466.4%18.0%3.7%
Late morning4977.6%14.3%0.0%
Afternoon53862.6%24.3%3.0%
Evening30955.3%28.8%4.2%
Night7657.9%21.1%11.8%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

DayFlightsOn time30+ minCancelled
Monday17859.0%24.7%5.6%
Tuesday16969.8%20.1%2.4%
Wednesday17154.4%30.4%2.9%
Thursday18065.0%20.0%3.9%
Friday17856.2%24.7%3.9%
Saturday16268.5%23.5%4.3%
Sunday17860.7%21.9%3.9%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 flights.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines1,13361.2%24.5%3.6%
Republic Airways8371.1%10.8%7.2%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

MonthFlightsOn time30+ minCancelled
July 202511366.4%24.8%1.8%
August 202510766.4%20.6%2.8%
September 202511967.2%20.2%0.8%
October 202511473.7%14.0%0.0%
November 20258955.1%32.6%4.5%
December 20256338.1%47.6%7.9%
January 20266250.0%27.4%1.6%
February 20267361.6%19.2%2.7%
March 202611049.1%31.8%11.8%
April 202613759.1%20.4%8.0%
May 202613467.9%21.6%0.7%
June 20269570.5%15.8%4.2%

What drove reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

Airline37.8%
Late aircraft30.9%
National airspace20.5%
Weather10.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.