$149 Cheap Flights from Sun Valley (SUN) to Seattle (SEA)

View $149 flight on Sat, May 16, 2026Opens in a new window

Popular airlines from Sun Valley, ID (SUN-Friedman Memorial) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Sun Valley to Seattle (SUN-SEA)

Prices were available within the past 7 days and start at $149 for one-way flights and $257 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Apr 15 - Sat, Apr 18
SUN
Sun Valley
SEA
Seattle
$257 Roundtrip, found 4 days ago
$257
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Wed, Apr 15 from Sun Valley to Seattle, returning Sat, Apr 18, priced at $257 found 4 days ago
Alaska Airlines
Fri, Apr 17 - Sat, Apr 18
SUN
Sun Valley
SEA
Seattle
$267 Roundtrip, found 2 days ago
$267
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Fri, Apr 17 from Sun Valley to Seattle, returning Sat, Apr 18, priced at $267 found 2 days ago
Alaska Airlines
Fri, May 8 - Sat, May 16
SUN
Sun Valley
SEA
Seattle
$269 Roundtrip, found 23 hours ago
$269
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Fri, May 8 from Sun Valley to Seattle, returning Sat, May 16, priced at $269 found 23 hours ago
Delta
Wed, Apr 22 - Tue, Apr 28
SUN
Sun Valley
SEA
Seattle
$277 Roundtrip, found 2 days ago
$277
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Apr 22 from Sun Valley to Seattle, returning Tue, Apr 28, priced at $277 found 2 days ago
Alaska Airlines
Fri, May 1 - Sun, May 3
SUN
Sun Valley
SEA
Seattle
$277 Roundtrip, found 3 hours ago
$277
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Fri, May 1 from Sun Valley to Seattle, returning Sun, May 3, priced at $277 found 3 hours ago
Delta
Fri, Apr 24 - Tue, Apr 28
SUN
Sun Valley
SEA
Seattle
$287 Roundtrip, just found
$287
Roundtrip
just found
Select Delta flight, departing Fri, Apr 24 from Sun Valley to Seattle, returning Tue, Apr 28, priced at $287 just found
Delta
Fri, May 8 - Sun, May 10
SUN
Sun Valley
SEA
Seattle
$297 Roundtrip, found 3 days ago
$297
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, May 8 from Sun Valley to Seattle, returning Sun, May 10, priced at $297 found 3 days ago
Alaska Airlines
Fri, Apr 24 - Tue, Apr 28
SUN
Sun Valley
SEA
Seattle
$317 Roundtrip, just found
$317
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Apr 24 from Sun Valley to Seattle, returning Tue, Apr 28, priced at $317 just found
American Airlines
Sun, Dec 20 - Tue, Dec 22
SUN
Sun Valley
SEA
Seattle
$722 Roundtrip, found 2 days ago
$722
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, Dec 20 from Sun Valley to Seattle, returning Tue, Dec 22, priced at $722 found 2 days ago
United
Wed, Apr 22 - Tue, Apr 28
SUN
Sun Valley
SEA
Seattle
$725 Roundtrip, found 2 days ago
$725
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 22 from Sun Valley to Seattle, returning Tue, Apr 28, priced at $725 found 2 days ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $537
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $537

Find the cheapest month to fly from Sun Valley (SUN) to Seattle (SEA)

December is typically the cheapest month to fly

From $139 - $886 per traveler.

Frequently asked questions

How much does a flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find cheap one-way flights from $149 and cheap return flights from $257 Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) with Expedia. One-way flights usually range from $119 to $955, and return flights typically cost between $338 and $1609. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest month to fly from SUN to SEA is April when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Delta operates around 14 direct flights from SUN to SEA every week.
What is the cheapest airline that flies from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Alaska Airlines is one of the cheapest airlines offering nonstop flights from Friedman Memorial (SUN) to Seattle - Tacoma Intl. (SEA) with round-trip tickets starting from around $197. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Sun Valley, ID (SUN) to Seattle, WA (SEA) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Delta typically offers the lowest fares. United offers the most daily flights from SUN to SEA, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can find approximately 1 nonstop flights per day from Friedman Memorial (SUN) to Seattle - Tacoma Intl. (SEA). For more options, look at flights that include layovers.
What is the earliest flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma International) typically departs at around 7:00 AM. Operated by United and Alaska Airlines, this early departure helps you maximize your time in Seattle. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Sun Valley, ID (SUN) to Seattle, WA (SEA) are from noon to 3pm. About 35% of passengers prefer this time window. Many major carriers, including United Airlines and Delta, offer flights during this window. This timing works well because it allows you to enjoy a leisurely morning before heading to the airport.
How long does it take to fly from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Direct flights from SUN to SEA usually take about 2 hours, traveling roughly 473 miles. If you opt for a connecting flight, expect to add around 5 hours 50 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
First class is available on flights from SUN to SEA. First class cabins are available on:

  • United Airlines
  • Delta Air Lines
  • American Airlines

How do I earn miles on a Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Friedman Memorial (SUN)?
From Friedman Memorial (SUN), you can fly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like Denver Intl. (DEN), Los Angeles Intl. (LAX), Salt Lake City Intl. (SLC) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) Seattle Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Sun Valley, ID (SUN-Friedman Memorial) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Friedman Memorial
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$257
Distance
473 mi

Book with confidence

Sun Valley to Seattle Flights

The cheapest times to fly from Sun Valley to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sun Valley to Seattle are during the month of April. You can find some of the cheapest flights from Sun Valley to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sun Valley to Seattle

Sunday is one of the best days to book for cheap flights from Sun Valley to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sun Valley to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sun Valley to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $149 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sun Valley to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sun Valley to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Sun Valley to Seattle Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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