$490 Cheap Flights from Washington (IAD) to Oulu (OUL)

View $490 flight on Mon, Feb 23, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Oulu (OUL)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Oulu (IAD-OUL)

Prices were available within the past 7 days and start at $490 for one-way flights and $744 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, Jan 18 - Tue, Jan 27
IAD
Washington
OUL
Oulu
$744 Roundtrip, found 6 days ago
$744
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Jan 18 from Washington to Oulu, returning Tue, Jan 27, priced at $744 found 6 days ago
British Airways
Sun, Jan 18 - Sun, Jan 25
IAD
Washington
OUL
Oulu
$794 Roundtrip, found 6 days ago
$794
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Jan 18 from Washington to Oulu, returning Sun, Jan 25, priced at $794 found 6 days ago
British Airways
Wed, Jan 14 - Tue, Jan 27
IAD
Washington
OUL
Oulu
$818 Roundtrip, found 6 days ago
$818
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Jan 14 from Washington to Oulu, returning Tue, Jan 27, priced at $818 found 6 days ago
American Airlines
Wed, Jan 14 - Sat, Jan 24
IAD
Washington
OUL
Oulu
$835 Roundtrip, found 6 days ago
$835
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Jan 14 from Washington to Oulu, returning Sat, Jan 24, priced at $835 found 6 days ago
American Airlines
Sun, Dec 7 - Sun, Dec 14
IAD
Washington
OUL
Oulu
$843 Roundtrip, found 6 days ago
$843
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Dec 7 from Washington to Oulu, returning Sun, Dec 14, priced at $843 found 6 days ago
United
Thu, Jan 15 - Mon, Jan 26
IAD
Washington
OUL
Oulu
$862 Roundtrip, found 6 days ago
$862
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jan 15 from Washington to Oulu, returning Mon, Jan 26, priced at $862 found 6 days ago
British Airways
Wed, Jan 14 - Thu, Jan 22
IAD
Washington
OUL
Oulu
$868 Roundtrip, found 6 days ago
$868
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Jan 14 from Washington to Oulu, returning Thu, Jan 22, priced at $868 found 6 days ago
British Airways
Wed, Nov 26 - Tue, Dec 9
IAD
Washington
OUL
Oulu
$918 Roundtrip, found 6 days ago
$918
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Nov 26 from Washington to Oulu, returning Tue, Dec 9, priced at $918 found 6 days ago
Turkish Airlines
Sun, Nov 9 - Wed, Nov 12
IAD
Washington
OUL
Oulu
$1,311 Roundtrip, found 8 hours ago
$1,311
Roundtrip
found 8 hours ago
Select Turkish Airlines flight, departing Sun, Nov 9 from Washington to Oulu, returning Wed, Nov 12, priced at $1,311 found 8 hours ago
Finnair
Sun, Nov 9 - Wed, Nov 12
IAD
Washington
OUL
Oulu
$1,478 Roundtrip, found 8 hours ago
$1,478
Roundtrip
found 8 hours ago
Select Finnair flight, departing Sun, Nov 9 from Washington to Oulu, returning Wed, Nov 12, priced at $1,478 found 8 hours ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL) cost?
Lock in a cheap one-way flight from $490 or cheap return flight from $744 from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL)?
January is the cheapest month to fly from IAD to OUL. Traveling outside of peak seasons is often the key to finding better fares.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IAD to OUL flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL)?
You'll need to take a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from IAD to OUL?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a number of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL)?
Select a flight from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL) last-minute?
Last-minute bookings from IAD to OUL are generally more expensive. To lock in the cheapest rates, start searching for flights well in advance. That being said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book an IAD to OUL flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to OUL flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place takes the hassle out of planning your trip. Just pick your flights and choose from our extensive range of hotels, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Oulu Airport (OUL)?
In most instances, you can reschedule or cancel your IAD to OUL flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Oulu
Roundtrip price
$743
Distance
4162 mi

Book with confidence

Washington to Oulu Flights

The cheapest times to fly from Washington to Oulu

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Oulu are during the month of January. You can find some of the cheapest flights from Washington to Oulu with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Oulu

Sunday is one of the best days to book for cheap flights from Washington to Oulu: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Oulu

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Oulu in 2025. You can also book with separate airlines for your outbound and return journeys, from $490 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Oulu flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Oulu airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Oulu Flights

Explore a world of travel with Expedia

*Available to One Key members.