$109 Cheap United flights Salt Lake City (SLC) to Seattle (SEA)

View $109 flight on Wed, Sep 3, 2025Opens in a new window

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$109 Cheap United flights Salt Lake City (SLC) to Seattle (SEA)

Prices were available within the past 7 days and start at $109 for one-way flights and $217 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Sep 20 - Sat, Sep 27
SLC
Salt Lake City
SEA
Seattle
$217 Roundtrip, just found
$217
Roundtrip
just found
Select United flight, departing Sat, Sep 20 from Salt Lake City to Seattle, returning Sat, Sep 27, priced at $217 just found
Flights from Salt Lake City (SLC) to Seattle (SEA)
Origin airport
Salt Lake City Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
687 mi
Average flight time
1 hour 15 mins

Frequently asked questions

How much is a United Airlines flight from Salt Lake City Intl. Airport (SLC) to Seattle - Tacoma Intl. Airport (SEA)?
Landing cheap one-way United Airlines flights from SLC to SEA from $109 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our affordable return fares from $217 for your next getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SLC to SEA with United Airlines?
January is one of the cheapest months to jet away to Seattle with United Airlines. You could also find great deals on one-way and return fares in February.
What is the cheapest time to book flights from Salt Lake City Intl. Airport (SLC) to Seattle - Tacoma Intl. Airport (SEA) with United Airlines?
Look for affordable United Airlines flights from Salt Lake City Intl. Airport (SLC) to Seattle - Tacoma Intl. Airport (SEA) one to three months prior to your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the ideal day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Salt Lake City Intl. Airport (SLC) to Seattle - Tacoma Intl. Airport (SEA)?
To see if there's a direct journey from SLC to SEA with United Airlines or another airline, select the "Nonstop" filter when looking for tickets.
What is the earliest United Airlines flight from SLC to SEA?
To find the earliest departures from SLC to SEA with United Airlines, filter your search by "Morning" and "Early Morning." Booking an early flight generally means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Seattle?
Jump on a United Airlines flight from Salt Lake City Intl. Airport (SLC) to Seattle, and you'll probably arrive at Seattle - Tacoma Intl. Airport (SEA). This is the airline's primary hub in this city.
Why fly with United Airlines from SLC to SEA?
A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to depart from SLC to SEA with United Airlines. Plus, when you join Expedia's free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. It's yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Salt Lake City Intl. Airport (SLC) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually cancel or reschedule your flight, although additional fees may apply if you booked more than 24 hours ago. Need flexible options? Use our "No cancel fee" or "Changes included" filter to find flights that won't charge you extra if you need to revise your plans. To make modifications, head to "Trips," select your flight and click on "Manage Booking" for more details.
*Available to One Key members.