Cheap flights from Helsinki to SeaTac from CA $899

View CA $899 flight on Tue, Nov. 18, 2025Opens in a new window

Popular airlines from Helsinki to SeaTac

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Helsinki (HEL) to SeaTac (SEA)

Prices were available within the past 7 days and start at CA $899 for one-way flights and CA $980 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $980 Roundtrip, found 5 days ago
CA $980
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $980 found 5 days ago
Air Canada
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $983 Roundtrip, found 5 days ago
CA $983
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $983 found 5 days ago
Air Canada
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $989 Roundtrip, found 5 days ago
CA $989
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $989 found 5 days ago
Icelandair
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $1,133 Roundtrip, found 5 days ago
CA $1,133
Roundtrip
found 5 days ago
Select Icelandair flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $1,133 found 5 days ago
Finnair
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $1,157 Roundtrip, found 5 days ago
CA $1,157
Roundtrip
found 5 days ago
Select Finnair flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $1,157 found 5 days ago
British Airways
Thu, Nov. 6 - Wed, Nov. 12
HEL
Helsinki
SEA
Seattle
CA $1,478 Roundtrip, found 5 days ago
CA $1,478
Roundtrip
found 5 days ago
Select British Airways flight, departing Thu, Nov. 6 from Helsinki to Seattle, returning Wed, Nov. 12, priced at CA $1,478 found 5 days ago

Find the cheapest month to fly from Helsinki (HEL) to Seattle (SEA)

May is typically the cheapest month to fly

From CA $710 - CA $1,399 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.