Cheap flights from Washington to Hanko

View AU$447 flight on Mon, 1 Sep. 2025Opens in a new window

Popular airlines from Washington to Hanko

  • 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 35% 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 Washington (WAS) to Hanko (OSL)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
TRF
Sandefjord
AU$713 Return, found 6 days ago
AU$713
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, 1 Sep. from Washington to Sandefjord, returning Mon, 8 Sep., priced at AU$713 found 6 days ago
Scandinavian Airlines
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
OSL
Oslo
AU$761 Return, found 6 days ago
AU$761
Return
found 6 days ago
Select Scandinavian Airlines flight, departing Mon, 1 Sep. from Washington to Oslo, returning Mon, 8 Sep., priced at AU$761 found 6 days ago
Icelandair
Mon, 1 Sep. - Mon, 8 Sep.
BWI
Baltimore
OSL
Oslo
AU$798 Return, found 6 days ago
AU$798
Return
found 6 days ago
Select Icelandair flight, departing Mon, 1 Sep. from Baltimore to Oslo, returning Mon, 8 Sep., priced at AU$798 found 6 days ago
United
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
OSL
Oslo
AU$857 Return, found 6 days ago
AU$857
Return
found 6 days ago
Select United flight, departing Mon, 1 Sep. from Washington to Oslo, returning Mon, 8 Sep., priced at AU$857 found 6 days ago
Delta
Mon, 1 Sep. - Mon, 8 Sep.
DCA
Washington
OSL
Oslo
AU$888 Return, found 6 days ago
AU$888
Return
found 6 days ago
Select Delta flight, departing Mon, 1 Sep. from Washington to Oslo, returning Mon, 8 Sep., priced at AU$888 found 6 days ago
Swiss International Air Lines
Mon, 1 Sep. - Mon, 8 Sep.
IAD
Washington
OSL
Oslo
AU$894 Return, found 6 days ago
AU$894
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Mon, 1 Sep. from Washington to Oslo, returning Mon, 8 Sep., priced at AU$894 found 6 days ago

Find the cheapest month to fly from Washington (WAS) to Oslo (OSL)

November is typically the cheapest month to fly

From AU$623 - AU$1,141 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.