Billings Logan International ⇄ Seattle-Tacoma International BIL–SEA
Airlines flew 1,823 flights between Billings Logan International BIL in Billings, MT and Seattle-Tacoma International SEA in Seattle, WA in the twelve months to July 2026, both directions together: 116,874 passengers in 139,341 seats, 84% of them filled, and 319,233 pounds of freight. 664 miles, about 106 minutes in the air, on 3 airlines: Horizon Air (1,814), Alaska Airlines Inc. (8), SkyWest Airlines Inc. (1). Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 118 |
| 2/25 | 104 |
| 3/25 | 117 |
| 4/25 | 121 |
| 5/25 | 157 |
| 6/25 | 182 |
| 7/25 | 182 |
| 8/25 | 178 |
| 9/25 | 164 |
| 10/25 | 176 |
| 11/25 | 159 |
| 12/25 | 122 |
| 1/26 | 123 |
| 2/26 | 111 |
| 3/26 | 116 |
| 4/26 | 120 |
| 5/26 | 162 |
| 6/26 | 179 |
| 7/26 | 213 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 7,701 |
| 2/25 | 6,527 |
| 3/25 | 7,505 |
| 4/25 | 7,677 |
| 5/25 | 10,523 |
| 6/25 | 12,379 |
| 7/25 | 12,294 |
| 8/25 | 12,176 |
| 9/25 | 10,660 |
| 10/25 | 10,918 |
| 11/25 | 9,772 |
| 12/25 | 8,010 |
| 1/26 | 7,374 |
| 2/26 | 6,740 |
| 3/26 | 7,373 |
| 4/26 | 7,430 |
| 5/26 | 10,646 |
| 6/26 | 12,151 |
| 7/26 | 13,624 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Horizon Air QX | 1,814 | 115,680 | 84% | scheduled passenger service |
| Alaska Airlines Inc. AS | 8 | 1,129 | 80% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 1 | 65 | 93% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Embraer ERJ-175 | 1,815 | 76 | 115,745 |
| Boeing 737-900ER | 5 | 178 | 739 |
| Boeing B737 Max 900 | 2 | 178 | 308 |
| Boeing B737 Max 800 | 1 | 161 | 82 |
BIL → SEA this direction alone · flown January 2025 to July 2026
906 flights of 918 scheduled, 58,442 passengers in 68,941 seats, 26,557 pounds of freight. Horizon Air 905; Alaska Airlines Inc. 1.
SEA → BIL this direction alone · flown January 2025 to July 2026
917 flights of 930 scheduled, 58,432 passengers in 70,400 seats, 292,676 pounds of freight, 19 pounds of mail. Horizon Air 909; Alaska Airlines Inc. 7; SkyWest Airlines 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 Seattle-Tacoma International SEA; all routes.