The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

Chicago O'Hare International ⇄ Decatur ORD–DEC

Airlines flew 1,200 flights between Chicago O'Hare International ORD in Chicago, IL and Decatur DEC in Decatur, IL in the twelve months to July 2026, both directions together: 19,869 passengers in 60,000 seats, 33% of them filled. 156 miles, about 32 minutes in the air, on 1 airline: SkyWest Airlines Inc. (1,200). Planning to fly it yourself? The weather and winds along this route right now.

1,200
flights, twelve months
ORD-DEC: 602 · DEC-ORD: 598
19,869
passengers
33% of seats filled
156
miles
about 32 minutes airborne
1
airline
2 aircraft types

Flights by month both directions

02855821101/254/257/2510/251/264/261027/26
By month, as a table
flights
1/25104
2/2596
3/25106
4/25103
5/25105
6/25106
7/25101
8/25103
9/25102
10/25110
11/2594
12/25102
1/26100
2/2698
3/2690
4/2697
5/26106
6/2696
7/26102

Passengers by month

05071,0141,5222,0291/254/257/2510/251/264/261,9167/26
By month, as a table
passengers
1/251,701
2/251,657
3/252,029
4/251,790
5/251,657
6/251,914
7/251,890
8/251,791
9/251,712
10/251,695
11/251,541
12/251,996
1/261,362
2/261,366
3/261,442
4/261,422
5/261,789
6/261,837
7/261,916

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
SkyWest Airlines Inc. OO1,20019,86933%scheduled passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Canadair RJ-200ER /RJ-4401,1985019,850
Bombardier CRJ55025019

ORD → DEC this direction alone · flown January 2025 to July 2026

602 flights of 602 scheduled, 9,855 passengers in 30,100 seats. SkyWest Airlines Inc. 602.

DEC → ORD this direction alone · flown January 2025 to July 2026

598 flights of 598 scheduled, 10,014 passengers in 29,900 seats. SkyWest Airlines Inc. 598.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Chicago O'Hare International ORD and Decatur DEC; all routes.