An Alaska Airlines plane taking off with a snow-capped mountain in the background.

$109 Cheap Flights from Sun Valley (SUN) to Seattle (SEA)

View $109 flight on Sat, Feb 20, 2027Opens 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 $109 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Feb 20 - Sat, Feb 27
SUN
Sun Valley
SEA
Seattle
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Delta flight, departing Sat, Feb 20 from Sun Valley to Seattle, returning Sat, Feb 27, priced at $157 just found
Delta
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$167 Roundtrip, just found
$167
Roundtrip
just found
Select Delta flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $167 just found
Delta
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Delta flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $177 just found
Alaska Airlines
Wed, Oct 28 - Wed, Nov 4
SUN
Sun Valley
SEA
Seattle
$217 Roundtrip, found 9 hours ago
$217
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Wed, Oct 28 from Sun Valley to Seattle, returning Wed, Nov 4, priced at $217 found 9 hours ago
Delta
Sat, Feb 20 - Sat, Feb 27
SUN
Sun Valley
SEA
Seattle
$227 Roundtrip, just found
$227
Roundtrip
just found
Select Delta flight, departing Sat, Feb 20 from Sun Valley to Seattle, returning Sat, Feb 27, priced at $227 just found
Delta
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Delta flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $237 just found
Alaska Airlines
Tue, Nov 3 - Sun, Nov 15
SUN
Sun Valley
SEA
Seattle
$244 Roundtrip, found 4 days ago
$244
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Tue, Nov 3 from Sun Valley to Seattle, returning Sun, Nov 15, priced at $244 found 4 days ago
Delta
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$247 Roundtrip, just found
$247
Roundtrip
just found
Select Delta flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $247 just found
Delta
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$247 Roundtrip, just found
$247
Roundtrip
just found
Select Delta flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $247 just found
United
Thu, Jan 28 - Sat, Jan 30
SUN
Sun Valley
SEA
Seattle
$820 Roundtrip, just found
$820
Roundtrip
just found
Select United flight, departing Thu, Jan 28 from Sun Valley to Seattle, returning Sat, Jan 30, priced at $820 just found

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 $507
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $507

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

March is typically the cheapest month to fly

From $99 - $489 per traveler.

What you need to know for your flight from Friedman Memorial to Seattle - Tacoma Intl.

Sun Valley (SUN) to Seattle (SEA) at a glance

Travel with a selection of airlines offering routes from Sun Valley (SUN) to Seattle (SEA) on this domestic short-haul journey. Compare various options for flights from Sun Valley to Seattle to find the itinerary that aligns with your budget and travel schedule as you prepare to explore the iconic sights and vibrant neighborhoods of Seattle. Discover essential details about flights from Friedman Memorial Airport (SUN) to Seattle-Tacoma International Airport (SEA).

  • Fastest flight duration: around 2 hours non-stop
  • Route distance: roughly 450 miles (725 km)
  • Flights per week: around 8 departures on average
  • Typical fares (one-way): economy tickets often range from $80–$500, depending on seasonality and how far ahead you book

Flights from Friedman Memorial Airport (SUN) to Seattle - Tacoma International Airport (SEA)

Based on the latest traveler bookings, here are the top airlines favored for flights from Sun Valley to Seattle, featuring both non-stop and one-stop options. A common layover occurs at Salt Lake City International Airport (SLC), with an average layover time of about 45 minutes. This gives you the flexibility to consider various combinations of price, total travel time, and cabin class to secure the ideal itinerary.

  • Alaska Airlines: This full-service airline provides non-stop flights, with one-way ticket prices generally falling between $100 and $530. It represents around 57% of departures on this route, with a total travel duration of 2 hours.
  • Delta: Offering both non-stop and one-stop options, Delta is a full-service airline with one-way fares typically ranging from $80 to $615. It accounts for about 40% of departures on this route, featuring a 1-stop journey of 3 hours and 30 minutes in-flight, leading to a total travel time of approximately 4 hours and 15 minutes.
  • Hawaiian Airlines: This full-service carrier specializes in non-stop service, with one-way fares usually between $160 and $290. It comprises about 3% of departures for this route, with a complete journey time of 2 hours.

Travelers have the option to upgrade their flight from Sun Valley to Seattle. Delta provides first class and premium economy cabins, while Alaska Airlines features first class and business class service for a more comfortable journey.

Best time to fly from Sun Valley (SUN) to Seattle (SEA)

The most popular months for travelers flying from Sun Valley to Seattle are February, March, and April, when peak temperatures in Seattle reach up to 48.6°F in April. If you prefer quieter travel, consider June, the least busy time to visit with temperatures around 61°F and typically the lowest average one-way fare (around $213). Flight availability peaks in December, with approximately 10 flights per week, making it easier to find convenient departure times.

  • Cheapest time to fly: June usually offers good deals with average one-way fare around $213, roughly 16% cheaper than the yearly average.
  • More budget-friendly months to fly: November, September, and December typically offer average one-way fares roughly ranging from $216 to $227.
  • Most flight options: December has the highest number of flights from Sun Valley to Seattle, with approximately 10 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January40.3°F (4.6°C)Average8$243
February40.5°F (4.7°C)High8$272
March43.9°F (6.6°C)High8$266
April48.6°F (9.2°C)High8$248
May55.8°F (13.2°C)Low7$236
June61.0°F (16.1°C)Low7$213
July67.1°F (19.5°C)Average7$256
August67.5°F (19.7°C)Low8$294
September61.3°F (16.3°C)Average7$222
October52.7°F (11.5°C)Average8$359
November44.2°F (6.8°C)Average7$216
December39.2°F (4.0°C)Average10$227

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Sun Valley (SUN) to Seattle (SEA)

  • Sun Valley to Seattle (SUN-BFI): Boeing Field Airport (BFI) is located approximately 6 miles from Seattle - Tacoma International Airport (SEA), offering convenient access to the city.

How to find the best prices for flights from Sun Valley (SUN) to Seattle (SEA)

Getting some of the best deals on flights from Sun Valley to Seattle is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are typically found when booking at least two months in advance, although most travelers book between two to eight weeks ahead. Afternoon departures (12 PM-6 PM) often offer lower prices, while morning flights (5 AM-12 PM) are more popular. Additionally, flying on Friday generally provides cheaper rates, even though Thursday is the most common travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Seattle - Tacoma International Airport from Friedman Memorial Airport

Seattle welcomes travelers from Sun Valley with a range of transport options based on price, convenience, and proximity. For departures, Friedman Memorial Airport is roughly a 30-minute drive (covering about 18 miles) from central Sun Valley. Seattle city center is approximately a 20-minute drive (covering about 14 miles) from Seattle - Tacoma International Airport, depending on traffic. Here's how to reach Seattle efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Seattle - Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles from the airport and can be reached on foot, while Tukwila Station, a train station, is about 4.3 miles away by car.

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 $109 and cheap return flights from $157 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 February 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

Origin airport
Friedman Memorial
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, United
Roundtrip price
$157
Distance
473 mi
Average flight time
1 hour 44 mins

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 February. 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 $109 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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