Seattle (SEA) to Sun Valley (SUN) flights
2 airlines fly nonstop from Seattle (SEA) to Sun Valley (SUN): Alaska Airlines and Delta Air Lines. The two airports are 473 miles (762 km) apart. Alaska Airlines is in oneworld and Delta Air Lines is in SkyTeam. There are also 2 ways to fly it with one stop, through Salt Lake City and San Francisco.
Airlines flying nonstop from SEA to SUN
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
- Delta Air LinesSkyTeam · bookable with 8 programsWho books it
Book SEA to SUN with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Aeromexico RewardsBooks Delta Air Lines
- Air France-KLM Flying BlueBooks Delta Air Lines
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- China Eastern Eastern MilesBooks Delta Air Lines
- Delta SkyMilesBooks Delta Air Lines
- Finnair PlusBooks Alaska Airlines
- Garuda Indonesia GarudaMilesBooks Delta Air Lines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- Korean Air SKYPASSBooks Delta Air Lines
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- SAS EuroBonusBooks Delta Air Lines
- Virgin Atlantic Flying ClubBooks Delta Air Lines
SEA to SUN with one stop
2 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via San Francisco (SFO)United Airlines the whole way
SEA to SUN: common questions
Which airlines fly nonstop from SEA to SUN?
Alaska Airlines (oneworld) and Delta Air Lines (SkyTeam) fly nonstop from Seattle (SEA) to Sun Valley (SUN).
How far is Seattle from Sun Valley by plane?
Seattle (SEA) and Sun Valley (SUN) are 473 miles (762 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book SEA to SUN award flights?
17 programs can book at least one of the nonstop airlines: Aeromexico Rewards, Air France-KLM Flying Blue, Alaska Atmos Rewards, American AAdvantage, British Airways Club, Cathay Pacific Asia Miles, China Eastern Eastern Miles, Delta SkyMiles and 9 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does SEA to SUN cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SEA to SUN with taxes and fees.
Where can I connect between Seattle and Sun Valley?
The most direct connections are through Salt Lake City (SLC) and San Francisco (SFO). On 2 of them the same airline flies both flights, for example Delta Air Lines through Salt Lake City.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.