Seattle (SEA) to Salt Lake City (SLC)
Flight time
≈ 2h 11m
Bearing
128° SE
Seattle (SEA) to Salt Lake City (SLC) is 688 miles (1,107 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
Look up a route, or build a trip
Change the airports, or add stops for a multi-leg trip.
What actually flies SEA–SLC
US DOT T-100 · filed dataIn April 2026, Delta Air Lines operated the most departures, one of 5 carriers flying nonstop SEA–SLC; the Boeing 737-900ER was the most common aircraft at 35% of departures; flights ran 81% full.
Departures
649
April 2026
Seats
105,597
both directions
Passengers
85,449
both directions
Load factor
80.9%
passengers ÷ seats
Who flies SEA–SLC?
Delta Air Lines operated the most nonstop SEA–SLC departures in April 2026 (353), one of 5 carriers on the route.
- DL
Delta Air Lines
353 departures · 61,423 seats
Share of departures54.4%84.4%
Load
- AS
Alaska Airlines
204 departures · 35,242 seats
Share of departures31.4%75.7%
Load
- OO
SkyWest Airlines
63 departures · 4,770 seats
Share of departures9.7%76.2%
Load
- QX
Horizon Air
17 departures · 1,292 seats
Share of departures2.6%88.2%
Load
- F9
Frontier Airlines
12 departures · 2,870 seats
Share of departures1.8%74.9%
Load
What plane flies SEA–SLC?
In April 2026, the Boeing 737-900ER flew 35% of SEA–SLC departures — more than any other aircraft type.
- Boeing 737-900ER
230 departures · 79.8% load
35.4% - Boeing 737-800
143 departures · 84.0% load
22.0% - Embraer E175
80 departures · 78.8% load
12.3% - Airbus A321neo
71 departures · 87.0% load
10.9% - Boeing 737 MAX 9
59 departures · 75.8% load
9.1% - Airbus A321
28 departures · 72.4% load
4.3% - Airbus A220-300
20 departures · 89.8% load
3.1% - Boeing 737 MAX 8
14 departures · 71.6% load
2.2% - Airbus A220-100
4 departures · 76.1% load
0.6%
How has SEA–SLC traffic changed?
Nonstop SEA–SLC departures fell from 731 in May 2025 to 649 in April 2026.
Monthly nonstop SEA–SLC traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
731 departures · 103,123 passengers
86.6%
Load
June 2025
755 departures · 105,616 passengers
88.1%
Load
July 2025
788 departures · 109,553 passengers
87.0%
Load
August 2025
818 departures · 112,449 passengers
85.8%
Load
September 2025
797 departures · 100,081 passengers
79.5%
Load
October 2025
725 departures · 94,236 passengers
79.4%
Load
November 2025
592 departures · 73,170 passengers
76.8%
Load
December 2025
618 departures · 82,024 passengers
81.9%
Load
January 2026
610 departures · 78,715 passengers
77.3%
Load
February 2026
597 departures · 77,756 passengers
76.6%
Load
March 2026
664 departures · 88,528 passengers
79.5%
Load
April 2026
649 departures · 85,449 passengers
80.9%
Load
By direction
The DOT files each direction separately — they rarely match.
SLC → SEA
80.8% full
325 departures · 42,709 passengers
SEA → SLC
81.1% full
324 departures · 42,740 passengers
Nonstop SEA–SLC traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
The airports
Frequently asked
How far is Seattle (SEA) from Salt Lake City (SLC)?
SEA to SLC is 688 miles (1,107 km / 598 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from SEA to SLC?
A nonstop covers the 688-mile great-circle distance in roughly 2h 11m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies SEA–SLC?
In April 2026, the Boeing 737-900ER flew the largest share of departures (35.4%), followed by the Boeing 737-800 (22.0%).
What mileage do I earn flying SEA–SLC?
Distance-based programs credit off the 688-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
Keep exploring
Every route below is its own page.
Other routes from SEA
Popular long-haul routes