$921 Cheap Flights from Baltimore (BWI) to Oulu (OUL)

View $921 flight on Mon, Dec 8, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Oulu (OUL)

Cheap Flights from Baltimore to Oulu (BWI-OUL)

Prices were available within the past 7 days and start at $921 for one-way flights and $970 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$970 Roundtrip, found 16 hours ago
$970
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $970 found 16 hours ago
British Airways
Wed, Mar 11 - Thu, Mar 26
BWI
Baltimore
OUL
Oulu
$1,038 Roundtrip, found 4 days ago
$1,038
Roundtrip
found 4 days ago
Select British Airways flight, departing Wed, Mar 11 from Baltimore to Oulu, returning Thu, Mar 26, priced at $1,038 found 4 days ago
British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,049 Roundtrip, found 16 hours ago
$1,049
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,049 found 16 hours ago
British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,071 Roundtrip, found 16 hours ago
$1,071
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,071 found 16 hours ago
British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,153 Roundtrip, found 16 hours ago
$1,153
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,153 found 16 hours ago
British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,168 Roundtrip, found 16 hours ago
$1,168
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,168 found 16 hours ago
British Airways
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,185 Roundtrip, found 16 hours ago
$1,185
Roundtrip
found 16 hours ago
Select British Airways flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,185 found 16 hours ago
Icelandair
Mon, Dec 8 - Sat, Dec 13
BWI
Baltimore
OUL
Oulu
$1,197 Roundtrip, found 4 days ago
$1,197
Roundtrip
found 4 days ago
Select Icelandair flight, departing Mon, Dec 8 from Baltimore to Oulu, returning Sat, Dec 13, priced at $1,197 found 4 days ago
American Airlines
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,246 Roundtrip, found 16 hours ago
$1,246
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,246 found 16 hours ago
Finnair
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,251 Roundtrip, found 16 hours ago
$1,251
Roundtrip
found 16 hours ago
Select Finnair flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,251 found 16 hours ago
Iberia
Fri, Mar 13 - Fri, Mar 27
BWI
Baltimore
OUL
Oulu
$1,274 Roundtrip, found 16 hours ago
$1,274
Roundtrip
found 16 hours ago
Select Iberia flight, departing Fri, Mar 13 from Baltimore to Oulu, returning Fri, Mar 27, priced at $1,274 found 16 hours ago
Flights from Baltimore (BWI) to Oulu (OUL)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Oulu
Airlines serving
British Airways
Roundtrip price
$969
Distance
4128 mi

Baltimore to Oulu Flights

The cheapest times to fly from Baltimore 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 Baltimore to Oulu are during the month of March. You can find some of the cheapest flights from Baltimore to Oulu with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Oulu

Sunday is one of the best days to book for cheap flights from Baltimore 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 Baltimore 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 Baltimore to Oulu in 2025. You can also book with separate airlines for your outbound and return journeys, from $921 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 Baltimore 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 Baltimore 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.

 

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL) cost?
Lock in a cheap one-way flight from $921 or cheap return flight from $970 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL)?
Planning your getaway for March is a good way to save, as it's the cheapest month for flights between BWI and OUL. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL)?
To find the cheapest airline flying from BWI to OUL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL)?
There are no daily nonstop flights available from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from BWI to OUL?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL)?
Select a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL) last-minute?
Last-minute bookings from BWI to OUL are typically more expensive. For the lowest rates, start looking for flights well in advance. That said, if you're flexible with your travel plans, you may land a cheap ticket just before your departure.
Is it cheaper to book a BWI to OUL flight and hotel package?
Compared with arranging flights and hotels separately, booking a BWI to OUL flight and hotel package with Expedia could result in significant savings. Better still, having everything in one place will take the stress out of travel planning. Just secure your flights and select from our wide range of stays, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Oulu Airport (OUL)?
Typically, it's possible to reschedule or cancel your BWI to OUL flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.