Salt Lake City International Airport
Salt Lake City, United StatesSLC / KSLC
International hub · 114 direct destinations · 3 runways · longest runway 12,001 ft
63 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Salt Lake City → Seattle
SLC
Salt Lake CitySalt Lake City International Airport
Salt Lake CitySalt Lake City International AirportSEASeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International Airport- Distance
- 688 mi
- Estimated flight time
- ~1h 55m
Seattle is currently 1 hour behind Salt Lake City.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 11 flights a day, observed from October 2025 to September 2026.
- 11
- flights per day
- 13
- busiest month · Jul
- 9
- quietest month · Nov
- 1 hr 42 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 10Jan2026
- 11Feb
- 11Mar
- 10Apr
- 11May
- 12Jun
- 13Jul
- 12Aug
- 11Sep
- 11Oct2025
- 9Nov
- 9Dec
Airlines
Who flies it
Delta Air Linesall year
Alaska Airlinesall year
SkyWest Airlinesall year
Frontier Airlineswinter
Horizon Airnow and then
Through the day
Departure times
Local time in Salt Lake City. Most departures between 11:00 and 14:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 11.5Mon
- 11Tue
- 9.6Wed
- 10.2Thu
- 11.4Fri
- 10.9Sat
- 10.4Sun
Fleet
Aircraft observed
- Boeing 737-800B73832%
- Boeing 737-900B73925%
- Airbus A321neoA21N14%
- Embraer 175E75L9%
- Boeing 737 MAX 9B39M8%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 10 | 293 |
|
| February 2026 | 11 | 302 |
|
| March 2026 | 11 | 317 |
|
| April 2026 | 10 | 301 |
|
| May 2026 | 11 | 309 |
|
| June 2026 | 12 | 336 |
|
| July 2026 | 13 | 402 |
|
| August 2026 | 12 | 359 |
|
| September 2026 | 11 | 330 |
|
| October 2025 | 11 | 361 |
|
| November 2025 | 9 | 285 |
|
| December 2025 | 9 | 265 |
|
Airlines observed on this route
From observed callsign routes on SLC-SEA - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Salt Lake City: 114.
- Direct destinations observed from Seattle: 132.
The airports on this route
Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
68 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Salt Lake City to Seattle
The observed direct connection between Salt Lake City International Airport (SLC) and Seattle–Tacoma International Airport (SEA) covers approximately 688 mi. The estimated flight time is around 1h 55m. Alaska Airlines, Delta Air Lines, Frontier Airlines, Horizon Air and SkyWest Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Salt Lake City from Seattle by air?
- The great-circle distance between Salt Lake City International Airport and Seattle–Tacoma International Airport is approximately 688 mi.
- How long is the flight from Salt Lake City to Seattle?
- Based on the distance, the estimated flight time is about 1h 55m. This is an estimate, not a schedule.
- Is there a direct connection from Salt Lake City to Seattle?
- Yes, a direct connection between SLC and SEA has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, Delta Air Lines, Frontier Airlines, Horizon Air and SkyWest Airlines.
- How often is there a flight from Salt Lake City to Seattle?
- On average around 11 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 3,860 observed flights. Mainly Delta Air Lines, Alaska Airlines, SkyWest Airlines. That is an observation, not a timetable.
- What is the current time difference between Salt Lake City and Seattle?
- Seattle is currently 1 hour behind Salt Lake City.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.