Find the cheapest flights on Expedia from Seattle (SEA) to Sun Valley (SUN). Flight ticket prices change frequently based on availability and demand. We send price-drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia for this route in the past 7 days starts at £115 for travel on 16 December 2026.
Cheap Flights from Seattle to Sun Valley (SEA-SUN)
Prices were available within the past 7 days and start at £115 for one-way flights and £183 for return, for the period specified. Prices and availability are subject to change.
Compare flights from Seattle to Sun Valley easily and book with confidence
For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Sun Valley. Operating between them 1 flights per day, 1 airlines cover the route. And Alaska Airlines fly direct, getting you to Friedman Memorial in just 1hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Friedman Memorial.
To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.
Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to Friedman Memorial (SUN)
The easiest way to view the best deals on flights from Seattle to Sun Valley today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to Friedman Memorial start at just £183 and range up to £341.
To find an even better deal, try
being flexible on your dates – midweek flights can be cheaper
looking for other airports near Seattle and Sun Valley
booking your flight during February, the cheapest month on this route
varying your flight times – early morning and late at night are sometimes cheaper
Why you should book your Seattle to Sun Valley flight with Expedia!
We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Friedman Memorial for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.
Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.
Frequently Asked Questions
How much is a flight from Sea-Tac Airport to Friedman Memorial Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip flight between Sea-Tac Airport and Friedman Memorial Airport (SUN) was £183. Fares this good don't last forever, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Friedman Memorial Airport?
Each air carrier has its own set of terms and conditions. If you decide to cancel your getaway, visit our Customer Service Portal.
How do I find cheap flights from Sea-Tac Airport to SUN that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to Friedman Memorial Airport (SUN) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Friedman Memorial Airport (SUN)?
The distance from Seattle - Tacoma Intl. Airport (SEA) (SEA) to Friedman Memorial Airport (SUN) is 760 kilometres. You'll be walking down the air bridge and collecting your baggage from the carousel in no time at all.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN)?
Offering 8 flights each month, Alaska Airlines (AS) is a great choice when flying straight from Sea-Tac Airport to Friedman Memorial Airport (SUN).
Are Sea-Tac Airport to Friedman Memorial Airport flight tickets cheaper when they're purchased at the last minute?
Booking your trip from SEA to Friedman Memorial Airport at the last minute could be your ticket to a great deal. However, it could end up costing a good deal more! If you'd rather avoid the risk, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to 12 months in advance. If your preferred air carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.