Salt Lake City (SLC) to Seattle (SEA) flights

Delta Air Lines, Alaska Airlines, SkyWest Airlines fly nonstop from Salt Lake City International Airport to Seattle-Tacoma International Airport, with about 94 flights a week in July 2026. The 689-mile flight takes about 2h 15m gate to gate.

From
SLC
Salt Lake City
Salt Lake City International Airport
To
SEA
Seattle
Seattle-Tacoma International Airport
Distance
689 mi · 1,109 km
Flight time
2h 15m
Airlines
3
Seats filled
82%
Flights a week, July 2026
4,162 flights and 556,442 passengers in 12 months
SEASEASLC
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying SLC to SEA

AirlineFlights a weekAircraftPassengers (12 months)Flight time
Delta Air Lines48Boeing 737-800, Boeing 737-900ER, Airbus A321330,4942h 13m
Alaska Airlines38Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800185,7952h 15m
SkyWest Airlines7Embraer E17524,9212h 25m
Horizon AirSeasonal or endedn/aEmbraer E1751,4802h 6m
Frontier AirlinesSeasonal or endedn/aAirbus A321, Airbus A320neo, Airbus A320-100/20013,7522h 25m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

SLC to SEA flight schedule

16 flight numbers flew this route in August 2026, 9 of them almost daily. The first usually leaves at 6:23am and the last at 10:45pm. Times are local and can change; check with the airline before you book.

FlightDepartsArrivesDays flown in August 2026On time (12 months)
AS 1444Alaska Airlines6:23am7:35am1891%
AS 3344Alaska Airlines · operated by SkyWest Airlines7:00am8:24am1385%
DL 2874Delta Air Lines7:45am8:57am3193%
AS 3381Alaska Airlines · operated by SkyWest Airlines9:10am10:35am1853%
AS 796Alaska Airlines11:17am12:30pm3184%
DL 2995Delta Air Lines11:45am12:59pm3187%
AS 664Alaska Airlines12:51pm2:04pm3182%
DL 2921Delta Air Lines1:32pm2:50pm3184%
DL 2817Delta Air Lines3:40pm4:54pm3177%
AS 734Alaska Airlines4:00pm5:16pm3066%
DL 871Delta Air Lines5:31pm6:44pm3180%
AS 3281Alaska Airlines · operated by SkyWest Airlines6:04pm7:25pm9n/a
AS 665Alaska Airlines6:44pm8:00pm1853%
AS 719Alaska Airlines8:46pm10:12pm1064%
DL 2016Delta Air Lines8:49pm10:05pm3146%
DL 2998Delta Air Lines10:45pm11:59pm1790%

Is SLC to SEA on time?

From September 2025 to August 2026, 80% of 4,119 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 7am were the most punctual (92%), those around 9am the least (56%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (43%).

AirlineFlightsOn timeAverage delayCancelled
Delta Air Lines2,23483%10 min0.5%
Alaska Airlines1,80877%14 min1.1%
Frontier Airlines7765%23 min2.6%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departureFlightsOn time, relativeOn time
6am to 7am129
92%
7am to 8am560
92%
9am to 10am217
56%
11am to 12pm631
86%
12pm to 1pm149
79%
1pm to 2pm379
84%
3pm to 4pm613
77%
4pm to 5pm117
64%
5pm to 6pm340
80%
6pm to 7pm129
68%
7pm to 8pm84
75%
8pm to 9pm322
60%
10pm to 11pm209
91%

Flights by month

MonthFlightsFlights, relativePassengers
August 2025407
55,183
September 2025398
48,833
October 2025363
46,822
November 2025293
36,304
December 2025305
40,808
January 2026307
40,048
February 2026299
39,194
March 2026337
45,649
April 2026325
42,709
May 2026352
49,310
June 2026364
52,710
July 2026415
59,215

Related

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.