Seattle-Tacoma International ⇄ Charles M Schulz/Sonoma County SEA–STS
Airlines flew 1,354 flights between Seattle-Tacoma International SEA in Seattle, WA and Charles M Schulz/Sonoma County STS in Santa Rosa, CA in the twelve months to July 2026, both directions together: 120,944 passengers in 161,723 seats, 75% of them filled, and 5,015 pounds of freight. 618 miles, about 92 minutes in the air, on 3 airlines: Alaska Airlines Inc. (701), Horizon Air (474), SkyWest Airlines Inc. (179). 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 | 100 |
| 2/25 | 86 |
| 3/25 | 98 |
| 4/25 | 92 |
| 5/25 | 112 |
| 6/25 | 118 |
| 7/25 | 121 |
| 8/25 | 122 |
| 9/25 | 119 |
| 10/25 | 124 |
| 11/25 | 117 |
| 12/25 | 101 |
| 1/26 | 91 |
| 2/26 | 101 |
| 3/26 | 120 |
| 4/26 | 114 |
| 5/26 | 121 |
| 6/26 | 102 |
| 7/26 | 122 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 6,229 |
| 2/25 | 5,615 |
| 3/25 | 6,366 |
| 4/25 | 6,524 |
| 5/25 | 9,513 |
| 6/25 | 10,598 |
| 7/25 | 11,554 |
| 8/25 | 12,902 |
| 9/25 | 13,669 |
| 10/25 | 11,565 |
| 11/25 | 9,784 |
| 12/25 | 9,221 |
| 1/26 | 5,985 |
| 2/26 | 6,048 |
| 3/26 | 8,471 |
| 4/26 | 9,932 |
| 5/26 | 10,730 |
| 6/26 | 10,505 |
| 7/26 | 12,132 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Alaska Airlines Inc. AS | 701 | 82,494 | 74% | scheduled passenger service |
| Horizon Air QX | 474 | 27,987 | 78% | scheduled passenger service |
| SkyWest Airlines Inc. OO | 179 | 10,463 | 77% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Embraer ERJ-175 | 653 | 76 | 38,450 |
| Boeing 737-800 | 615 | 160 | 72,518 |
| Boeing B737 Max 800 | 80 | 160 | 9,293 |
| Boeing 737-900ER | 4 | 178 | 465 |
| Boeing 737-700/700LR/Max 7 | 2 | 124 | 218 |
SEA → STS this direction alone · flown January 2025 to July 2026
669 flights of 707 scheduled, 60,744 passengers in 79,873 seats, 2,935 pounds of freight. Alaska Airlines Inc. 346; Horizon Air 251; SkyWest Airlines Inc. 72.
STS → SEA this direction alone · flown January 2025 to July 2026
685 flights of 699 scheduled, 60,200 passengers in 81,850 seats, 2,080 pounds of freight. Alaska Airlines Inc. 355; Horizon Air 223; SkyWest Airlines Inc. 107.
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: Seattle-Tacoma International SEA and Charles M Schulz/Sonoma County STS; all routes.