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

Billings Logan International ⇄ Chicago O'Hare International BIL–ORD

Airlines flew 629 flights between Billings Logan International BIL in Billings, MT and Chicago O'Hare International ORD in Chicago, IL in the twelve months to July 2026, both directions together: 38,893 passengers in 46,708 seats, 83% of them filled, and 822 pounds of freight. 1,060 miles, about 139 minutes in the air, on 5 airlines: Envoy Air (455), SkyWest Airlines Inc. (169), Alaska Airlines Inc. (2), United Air Lines Inc. (2) and 1 more. Planning to fly it yourself? The weather and winds along this route right now.

629
flights, twelve months
BIL-ORD: 313 · ORD-BIL: 316
38,893
passengers
83% of seats filled
1,060
miles
about 139 minutes airborne
5
airlines
6 aircraft types

Flights by month both directions

046921381841/256/259/255/26617/26
By month, as a table
flights
1/251
2/253
5/2521
6/25164
7/25184
8/25182
9/25179
10/25121
11/255
5/2622
6/2659
7/2661

Passengers by month

02,8425,6848,52611,3681/256/259/255/263,9817/26
By month, as a table
passengers
1/25168
2/25172
5/251,505
6/2510,275
7/2511,368
8/2511,145
9/2510,783
10/257,178
11/25396
5/261,442
6/263,968
7/263,981

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
Envoy Air MQ45527,39283%scheduled passenger service
SkyWest Airlines Inc. OO16910,86985%scheduled passenger service
Alaska Airlines Inc. AS224071%scheduled passenger service
United Air Lines Inc. UA225283%scheduled passenger service
American Airlines Inc. AA114081%scheduled passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
Embraer ERJ-1754887631,367
Embraer-Emb-170136656,894
Boeing B737 Max 8002166223
Boeing B737 Max 9001178157
Boeing 737-900ER1179173
Boeing 737-700/700LR/Max 7112679

BIL → ORD this direction alone · flown February 2025 to July 2026

313 flights of 312 scheduled, 19,721 passengers in 23,227 seats, 589 pounds of freight, 864 pounds of mail. Envoy Air 227; SkyWest Airlines Inc. 84; Alaska Airlines Inc. 1; United Air Lines Inc. 1.

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

316 flights of 315 scheduled, 19,172 passengers in 23,481 seats, 233 pounds of freight. Envoy Air 228; SkyWest Airlines Inc. 85; American Airlines Inc. 1; Alaska Airlines Inc. 1; United Air Lines Inc. 1.

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: Billings Logan International BIL and Chicago O'Hare International ORD; all routes.