Seattle-Tacoma International ⇄ Salt Lake City International SEA–SLC
Airlines flew 8,337 flights between Seattle-Tacoma International SEA in Seattle, WA and Salt Lake City International SLC in Salt Lake City, UT in the twelve months to July 2026, both directions together: 1,106,671 passengers in 1,356,327 seats, 82% of them filled, and 1,084,042 pounds of freight. 689 miles, about 92 minutes in the air, on 9 airlines: Delta Air Lines Inc. (4,472), Alaska Airlines Inc. (2,801), SkyWest Airlines Inc. (830), Frontier Airlines Inc. (174) and 5 more. 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 | 659 |
| 2/25 | 571 |
| 3/25 | 629 |
| 4/25 | 620 |
| 5/25 | 731 |
| 6/25 | 755 |
| 7/25 | 788 |
| 8/25 | 818 |
| 9/25 | 797 |
| 10/25 | 725 |
| 11/25 | 592 |
| 12/25 | 618 |
| 1/26 | 611 |
| 2/26 | 597 |
| 3/26 | 664 |
| 4/26 | 649 |
| 5/26 | 702 |
| 6/26 | 732 |
| 7/26 | 832 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 75,624 |
| 2/25 | 71,512 |
| 3/25 | 80,617 |
| 4/25 | 80,682 |
| 5/25 | 103,123 |
| 6/25 | 105,616 |
| 7/25 | 109,553 |
| 8/25 | 112,449 |
| 9/25 | 100,081 |
| 10/25 | 94,236 |
| 11/25 | 73,170 |
| 12/25 | 82,024 |
| 1/26 | 78,715 |
| 2/26 | 77,756 |
| 3/26 | 88,528 |
| 4/26 | 85,449 |
| 5/26 | 93,507 |
| 6/26 | 104,684 |
| 7/26 | 116,072 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| Delta Air Lines Inc. DL | 4,472 | 652,851 | 84% | charter passenger service, scheduled passenger service |
| Alaska Airlines Inc. AS | 2,801 | 372,482 | 79% | charter passenger service, scheduled passenger service |
| SkyWest Airlines Inc. OO | 830 | 49,988 | 79% | scheduled passenger service |
| Frontier Airlines Inc. F9 | 174 | 27,407 | 71% | scheduled passenger service |
| Horizon Air QX | 42 | 2,850 | 89% | scheduled passenger service |
| Federal Express Corporation FX | 7 | 0 | scheduled cargo service | |
| Sun Country Airlines d/b/a MN Airlines SY | 4 | 118 | 16% | charter passenger service |
| Southwest Airlines Co. WN | 4 | 499 | 75% | scheduled passenger service |
| American Airlines Inc. AA | 3 | 476 | 89% | scheduled passenger service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing 737-800 | 2,485 | 160 | 332,722 |
| Boeing 737-900ER | 2,111 | 179 | 301,067 |
| Airbus Industrie A321-200n | 1,031 | 198 | 173,034 |
| Embraer ERJ-175 | 872 | 76 | 52,838 |
| Boeing B737 Max 900 | 788 | 178 | 108,989 |
| Airbus Industrie A321Neoxlr | 440 | 192 | 69,445 |
| Boeing 737-700/700LR/Max 7 | 194 | 124 | 20,265 |
| A220-300 BD-500-1A11 | 142 | 130 | 16,670 |
| Boeing B737 Max 800 | 141 | 161 | 17,995 |
| Airbus Industrie A320-200n | 49 | 186 | 6,276 |
| A200-100 BD-500-1A10 | 41 | 109 | 3,540 |
| Boeing 737-900 | 14 | 178 | 1,719 |
| Boeing 767-300/300ER | 7 | 0 | 0 |
| Airbus Industrie A319 | 5 | 132 | 189 |
| Boeing 757-200 | 5 | 165 | 624 |
| Airbus Industrie A320-100/200 | 5 | 178 | 669 |
| Airbus Industrie A350-900 | 3 | 275 | 629 |
| Airbus Industrie A330-300/333 | 2 | 282 | 0 |
| Airbus Industrie A330-200 | 2 | 223 | 0 |
SEA → SLC this direction alone · flown January 2025 to July 2026
4,163 flights of 4,187 scheduled, 549,825 passengers in 678,318 seats, 837,330 pounds of freight, 23,111 pounds of mail. Delta Air Lines Inc. 2,233; Alaska Airlines Inc. 1,403; SkyWest Airlines Inc. 408; Frontier Airlines Inc. 87; Horizon Air 20; Federal Express Corporation 6; American Airlines Inc. 2; Sun Country Airlines d/b/a MN Airlines 2; Southwest Airlines Co. 2.
SLC → SEA this direction alone · flown January 2025 to July 2026
4,174 flights of 4,188 scheduled, 556,846 passengers in 678,009 seats, 246,712 pounds of freight, 122,738 pounds of mail. Delta Air Lines Inc. 2,239; Alaska Airlines Inc. 1,398; SkyWest Airlines Inc. 422; Frontier Airlines Inc. 87; Horizon Air 22; Sun Country Airlines d/b/a MN Airlines 2; Southwest Airlines Co. 2; American Airlines Inc. 1; Federal Express Corporation 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: Seattle-Tacoma International SEA and Salt Lake City International SLC; all routes.