$129 Cheap Flights from Seattle (SEA) to Sun Valley (SUN)

View $129 flight on Tue, Sep 9, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $129 for one-way flights and $217 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 16 - Wed, Sep 24
SEA
Seattle
SUN
Sun Valley
$217 Roundtrip, found 2 hours ago
$217
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 16 from Seattle to Sun Valley, returning Wed, Sep 24, priced at $217 found 2 hours ago
Delta
Tue, Sep 16 - Thu, Sep 25
SEA
Seattle
SUN
Sun Valley
$227 Roundtrip, found 2 hours ago
$227
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 16 from Seattle to Sun Valley, returning Thu, Sep 25, priced at $227 found 2 hours ago
Delta
Mon, Sep 15 - Thu, Sep 25
SEA
Seattle
SUN
Sun Valley
$237 Roundtrip, found 2 hours ago
$237
Roundtrip
found 2 hours ago
Select Delta flight, departing Mon, Sep 15 from Seattle to Sun Valley, returning Thu, Sep 25, priced at $237 found 2 hours ago
Delta
Tue, Sep 16 - Wed, Sep 17
SEA
Seattle
SUN
Sun Valley
$257 Roundtrip, found 2 hours ago
$257
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 16 from Seattle to Sun Valley, returning Wed, Sep 17, priced at $257 found 2 hours ago
Delta
Tue, Sep 16 - Thu, Sep 18
SEA
Seattle
SUN
Sun Valley
$267 Roundtrip, found 2 hours ago
$267
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 16 from Seattle to Sun Valley, returning Thu, Sep 18, priced at $267 found 2 hours ago
Delta
Tue, Sep 16 - Thu, Oct 2
SEA
Seattle
SUN
Sun Valley
$277 Roundtrip, found 2 hours ago
$277
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 16 from Seattle to Sun Valley, returning Thu, Oct 2, priced at $277 found 2 hours ago
Alaska Airlines
Fri, Jan 9 - Sun, Jan 11
SEA
Seattle
SUN
Sun Valley
$297 Roundtrip, just found
$297
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Jan 9 from Seattle to Sun Valley, returning Sun, Jan 11, priced at $297 just found
Hawaiian Airlines
Mon, Jan 19 - Mon, Feb 9
SEA
Seattle
SUN
Sun Valley
$322 Roundtrip, found 3 days ago
$322
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Mon, Jan 19 from Seattle to Sun Valley, returning Mon, Feb 9, priced at $322 found 3 days ago
United
Wed, Aug 13 - Sat, Aug 16
SEA
Seattle
SUN
Sun Valley
$475 Roundtrip, found 5 days ago
$475
Roundtrip
found 5 days ago
Select United flight, departing Wed, Aug 13 from Seattle to Sun Valley, returning Sat, Aug 16, priced at $475 found 5 days ago
American Airlines
Tue, Dec 30 - Thu, Jan 1
SEA
Seattle
SUN
Sun Valley
$557 Roundtrip, found 6 days ago
$557
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Dec 30 from Seattle to Sun Valley, returning Thu, Jan 1, priced at $557 found 6 days ago

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

January is typically the cheapest month to fly

From $166 - $487 per traveler.

Graph displaying average flight prices per month

Alternative airports near Sun Valley

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

Select flight to Friedman Memorial SUN. Cheapest and Closest option available. Average driving time to city center is 23 minutes. Flights from $497
SUN
Friedman Memorial
CheapestClosest
Average driving time to city center23 min
Flights from $497
Flights from Seattle (SEA) to Sun Valley (SUN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Friedman Memorial
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$216
Distance
473 mi
Average flight time
1 hour 33 mins

Seattle to Sun Valley Flights

The cheapest times to fly from Seattle to Sun Valley

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 Seattle to Sun Valley are during the month of September. You can find some of the cheapest flights from Seattle to Sun Valley with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Seattle to Sun Valley: 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 Seattle to Sun Valley

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 Seattle to Sun Valley in 2025. You can also book with separate airlines for your outbound and return journeys, from $129 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 Seattle to Sun Valley 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 Seattle to Sun Valley 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.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) cost?
Cheap return flights from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) start from $176. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving SEA on August 17 2025 and touching down at SUN. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from SEA to SUN?
The cheapest flights from SEA to SUN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
You can fly straight from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) on an Alaska Airlines flight.
What is the cheapest airline that flies from SEA to SUN?
With prices as low as $109 for a one-way journey from SEA to SUN, Alaska Airlines is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on October 16 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
On average, only 1 direct flight departs daily from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN). Need more options? Use our filter tool to discover flights with layovers and add a new destination to your journey.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
The 7 AM departures from SEA to SUN are typically the busiest. Greater demand means you'll likely pay more for these departures. If you want to save money, book during off-peak hours.
What day of the week has the most flights from SEA to SUN?
If you depart on a Friday, you'll get the largest range of choices for flights from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN).
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
Hop on the earliest flight at around 7:00AM UTC-8, leaving from Seattle - Tacoma Intl. Airport (SEA). You'll be flying for approximately 1h 40m, landing at Friedman Memorial Airport (SUN) at approximately 9:40AM UTC-7.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
The average flight duration from SEA to SUN is 1 hour and 39 minutes, covering a total distance of 470 mi.
What airline has the least delays from SEA to SUN?
Consider traveling with American Airlines if you'd like to go straight from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) without any delays. This airline has the strongest track record for punctuality, with an on-time performance of 90%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) route, fly before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Sun Valley from Seattle - Tacoma Intl. Airport (SEA)?
Friedman Memorial Airport (SUN) is the only airport in Sun Valley with direct flights from Seattle - Tacoma Intl. Airport (SEA). Browse your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN) last-minute?
Waiting until just before your departure to book a ticket from SEA to SUN often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Keep your travel schedule open for the best chance of landing a bargain.
Is it cheaper to book a SEA to SUN flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to SUN flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place takes the hassle out of planning your trip. Simply pick your flights and select from our extensive range of hotels, then customize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
It's usually possible to cancel or reschedule your SEA to SUN flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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