Photo by Robbie Martin

Popular airlines from Seattle to Great Diamond Island
- American Airlines
American Airlines
- Delta
Delta
- United
United
- Plan, book, fly with confidence
trending down icon Be in the knowGet alerts if flight prices drop or rise*bex rewards loyalty icon Book smarterSave up to 40% on select hotels after you book a flight*payments icon
Cheap Flights from Seattle to Great Diamond Island (SEA-PWM)
Prices were available within the past 7 days and start at ¥42,440 for one-way flights and ¥68,260 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥68,260 Roundtrip, found 1 day ago
¥68,260
Roundtrip
found 1 day ago

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥76,220 Roundtrip, found 1 day ago
¥76,220
Roundtrip
found 1 day ago

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥77,500 Roundtrip, found 1 day ago
¥77,500
Roundtrip
found 1 day ago

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥79,970 Roundtrip, found 1 day ago
¥79,970
Roundtrip
found 1 day ago

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥93,300 Roundtrip, found 1 day ago
¥93,300
Roundtrip
found 1 day ago

Thu, Aug 7 - Tue, Aug 12
SEA
Seattle
PWM
Portland
¥103,950 Roundtrip, found 1 day ago
¥103,950
Roundtrip
found 1 day ago
Find the cheapest month to fly from Seattle (SEA) to Portland (PWM)
September is typically the cheapest month to fly
From ¥32,070 - ¥65,398 per traveler.
Graph displaying average flight prices per month
Top Routes to Great Diamond Island
Expedia's Latest Trends
Hotels
Comfort Hotel ERA Kyoto TojiTabist Urban Stays AsakusaGrand Hyatt TaipeiHotel Hokke Club Osakanoku OSAKAHostels MatsuyamaGrand Hyatt SeattleHotels in TomisatoHotels near Expo ’70 Commemorative ParkThe Leela Palace New DelhiHotels in New CaledoniaResorts & Hotels with Spas in Okinawa IslandBayside Hotel Azur Takeshiba HamamatsuchoGuest Houses Kinshicho Station
Flights
Flights from Tashkent (TAS) to Narita (NRT)Flights from Chicago (ORD) to Pittsburgh (PIT)Flights from Tokyo (HND) to Bora Bora (BOB)Flights from Kathmandu (KTM) to Delhi (DEL)Flights from Vancouver to AnaheimFlights from Iwakuni to San DiegoFlights from Kobe (ITM) to Guadalajara (GDL)Flights from Sepang (KUL) to Hulhulé (MLE)Flights from Tokyo (HND) to Seattle (SEA)Flights from Narita (NRT) to Koh Samui (USM)Flights from Da Nang (DAD) to Bangkok (BKK)
*Available to Expedia members.