Salt Lake City to Seattle-Tacoma
688 miles great-circle distance, typically flown in 1h 47m with 5 airlines operating direct service from Salt Lake City (SLC) to Seattle-Tacoma (SEA). Cheapest fares are usually in January (around $119 return), with peak prices in August (around $357). Departures on a Tuesday tend to undercut weekend prices on this corridor.
Flying from Salt Lake City
Salt Lake City International is Delta's principal mountain-region hub, completely rebuilt 2020–2024 with a single new concourse replacing the legacy 1960s terminals. TRAX Green Line light rail runs from the airport directly to downtown Salt Lake City in 25 minutes for $2.50. Delta operates over 90% of the schedule, making SLC essentially a Delta-monopoly hub for many destinations. International long-haul service includes Amsterdam, Paris CDG and seasonal Cancun/Mexico City through Delta and partner KLM.
Arriving in Seattle
Seattle-Tacoma is 14 miles south of downtown Seattle, with the Link Light Rail Red Line running directly from the airport station to Westlake in 38 minutes for $3.25 — possibly the simplest big-city airport transfer in the United States. Fares peak in mid-summer (June–August) and around Bumbershoot/Labor Day; January and February are the cheapest months despite winter rain.
Who flies SLC to SEA?
| Airline | IATA | Flight time | Cabin |
| Delta Air Lines | DL | 1h 47m | Economy |
| Southwest Airlines | WN | 1h 47m | Economy |
| American Airlines | AA | 1h 47m | Economy |
| United Airlines | UA | 1h 47m | Economy |
| JetBlue Airways | B6 | 1h 47m | Economy |
5 carriers fly direct on this corridor. Frequencies vary by season — summer and winter holiday peaks see additional flights.
Best time to fly SLC→SEA
Synthesised from 12-month price aggregates. Cheapest months in green, peak in red.
Estimated baseline. Prices update on a 30-day cadence as Travelpayouts data refreshes. Cheapest day-of-week typically Tuesday.
Salt Lake City to Seattle FAQs
Direct flights from Salt Lake City (SLC) to Seattle-Tacoma (SEA) take approximately 1h 47m for the 688-mile journey, plus 30–60 minutes of taxi, climb and descent. Total airport-to-airport time depends on cruise winds and air-traffic queueing on approach.
January is typically the cheapest month on this route, with one-way fares from $119. August is the peak — expect prices 2–3× higher. Book 4–8 weeks ahead for best fares; last-minute prices on this corridor rise sharply inside two weeks of departure.
5 carriers operate direct service from Salt Lake City (SLC) to Seattle-Tacoma (SEA): Delta Air Lines, Southwest Airlines, American Airlines, United Airlines and JetBlue Airways. Frequencies vary by season and carrier — Delta Air Lines typically operates the highest weekly count on this corridor.
No — United States is domestic travel for US citizens. A US passport is not required for the 50 states, DC or US territories (Puerto Rico, US Virgin Islands, Guam, American Samoa, Northern Mariana Islands), though Real ID-compliant ID is required at TSA from May 2025.
Seattle-Tacoma (SEA) is the primary international airport for Seattle. Allow 30–60 minutes for the ground transfer by train, express bus, taxi or rideshare depending on traffic and time of day. See the airport's official website for current train and shuttle timetables.