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
Route
Seattle → Salt Lake City
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportSLCSalt Lake CitySalt Lake City International Airport
Salt Lake CitySalt Lake City International Airport- Distance
- 688 mi
- Estimated flight time
- ~1h 55m
Salt Lake City is currently 1 hour ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 10.5 flights a day, observed from October 2025 to September 2026.
- 10.5
- flights per day
- 13
- busiest month · Jul
- 10
- quietest month · Nov
- 1 hr 32 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 10Jan2026
- 10Feb
- 10Mar
- 10Apr
- 11May
- 12Jun
- 13Jul
- 12Aug
- 11Sep
- 12Oct2025
- 10Nov
- 10Dec
Airlines
Who flies it
Delta Air Linesall year
Alaska Airlinesall year
SkyWest Airlinesall year
Frontier Airlineswinter
Horizon Airnow and then
FedExsummer
Through the day
Departure times
Local time in Seattle. Most departures between 09:00 and 12:00.
- 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
- 11.7Mon
- 10.9Tue
- 9.9Wed
- 10.4Thu
- 11.4Fri
- 10.6Sat
- 10.8Sun
Fleet
Aircraft observed
- Boeing 737-800B73832%
- Boeing 737-900B73925%
- Airbus A321neoA21N14%
- Embraer 175E75L8%
- Boeing 737 MAX 9B39M8%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 10 | 291 |
|
| February 2026 | 10 | 289 |
|
| March 2026 | 10 | 309 |
|
| April 2026 | 10 | 300 |
|
| May 2026 | 11 | 306 |
|
| June 2026 | 12 | 361 |
|
| July 2026 | 13 | 405 |
|
| August 2026 | 12 | 368 |
|
| September 2026 | 11 | 340 |
|
| October 2025 | 12 | 362 |
|
| November 2025 | 10 | 296 |
|
| December 2025 | 10 | 278 |
|
Airlines observed on this route
From observed callsign routes on SEA-SLC - 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 Seattle: 132.
- Direct destinations observed from Salt Lake City: 114.
The airports on this route
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
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Seattle to Salt Lake City
The observed direct connection between Seattle–Tacoma International Airport (SEA) and Salt Lake City International Airport (SLC) covers approximately 688 mi. The estimated flight time is around 1h 55m. Alaska Airlines, Delta Air Lines, FedEx, 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 Seattle from Salt Lake City by air?
- The great-circle distance between Seattle–Tacoma International Airport and Salt Lake City International Airport is approximately 688 mi.
- How long is the flight from Seattle to Salt Lake City?
- 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 Seattle to Salt Lake City?
- Yes, a direct connection between SEA and SLC 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, FedEx, Frontier Airlines, Horizon Air and SkyWest Airlines.
- How often is there a flight from Seattle to Salt Lake City?
- On average around 10.5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 3,905 observed flights. Mainly Delta Air Lines, Alaska Airlines, SkyWest Airlines. That is an observation, not a timetable.
- What is the current time difference between Seattle and Salt Lake City?
- Salt Lake City is currently 1 hour ahead of Seattle.
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.