$99 Cheap Delta flights Seattle (SEA) to Sun Valley (SUN)

You can discover affordable round-trip Delta Air Lines flights from $188 from SEA to SUN by filtering your results from “Price (lowest to highest)” on Expedia. Or search for options from $99 for a one-way journey.**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.

Look for round-trip or one-way flights to Sun Valley in November or April. You could find lower fares with Delta Air Lines during these off-season months.

Start searching one to three months ahead of your departure date to find cheap fares on Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Friedman Memorial Airport (SUN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic trips.*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.

Click on the “Nonstop” filter when looking for direct Delta Air Lines flights from SEA to SUN. It’s also a great way to compare other carriers servicing the same nonstop journey.

Filter your results by “Morning” and “Early Morning” to see the earliest departures from SEA to SUN. Leaving early means you’re 20% less likely to experience 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.

Friedman Memorial Airport (SUN) is the primary Sun Valley gateway for Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA).

Jetting off from SEA to SUN with Delta Air Lines means enjoying a range of perks, such as a rewarding loyalty program and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s in addition to the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to cancel or change your flight, although there may be a charge if you made your booking over 24 hours ago. Prefer to keep your options open? Apply the “No cancel fee” or “Changes included” filter to find flights that won’t penalize you if you have to revise your plans. To modify your booking, head to “Trips,” select your flight and click on “Manage Booking” for more details.