$507 Cheap Flights from Oslo (OSL) to St. Louis (STL)

View $507 flight on Wed, May 28, 2025Opens in a new window

Popular airlines from Gardermoen Airport (OSL) to St. Louis Lambert Intl. Airport (STL)

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Find available prices by choosing your travel dates.

Cheap Flights from Oslo to St. Louis (OSL-STL)

Prices were available within the past 7 days and start at $507 for one-way flights and $500 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, May 13 - Wed, May 28
OSL
Oslo
STL
St. Louis
$500 Roundtrip, found 6 days ago
$500
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, May 13 from Oslo to St. Louis, returning Wed, May 28, priced at $500 found 6 days ago
American Airlines
Tue, May 13 - Wed, May 28
OSL
Oslo
STL
St. Louis
$503 Roundtrip, found 6 days ago
$503
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, May 13 from Oslo to St. Louis, returning Wed, May 28, priced at $503 found 6 days ago
Iberia
Tue, May 13 - Wed, May 28
OSL
Oslo
STL
St. Louis
$516 Roundtrip, found 6 days ago
$516
Roundtrip
found 6 days ago
Select Iberia flight, departing Tue, May 13 from Oslo to St. Louis, returning Wed, May 28, priced at $516 found 6 days ago
United
Fri, May 9 - Tue, May 13
OSL
Oslo
STL
St. Louis
$518 Roundtrip, found 6 hours ago
$518
Roundtrip
found 6 hours ago
Select United flight, departing Fri, May 9 from Oslo to St. Louis, returning Tue, May 13, priced at $518 found 6 hours ago
Lufthansa
Wed, Oct 22 - Wed, Nov 12
OSL
Oslo
STL
St. Louis
$519 Roundtrip, found 5 days ago
$519
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Wed, Oct 22 from Oslo to St. Louis, returning Wed, Nov 12, priced at $519 found 5 days ago
United
Fri, May 9 - Sun, May 18
OSL
Oslo
STL
St. Louis
$520 Roundtrip, found 6 hours ago
$520
Roundtrip
found 6 hours ago
Select United flight, departing Fri, May 9 from Oslo to St. Louis, returning Sun, May 18, priced at $520 found 6 hours ago
United
Fri, May 9 - Mon, May 12
OSL
Oslo
STL
St. Louis
$525 Roundtrip, found 6 hours ago
$525
Roundtrip
found 6 hours ago
Select United flight, departing Fri, May 9 from Oslo to St. Louis, returning Mon, May 12, priced at $525 found 6 hours ago
Air Canada
Thu, May 8 - Tue, May 13
OSL
Oslo
STL
St. Louis
$529 Roundtrip, found 6 hours ago
$529
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Thu, May 8 from Oslo to St. Louis, returning Tue, May 13, priced at $529 found 6 hours ago
American Airlines
Thu, Aug 28 - Thu, Sep 18
OSL
Oslo
STL
St. Louis
$530 Roundtrip, found 3 hours ago
$530
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, Aug 28 from Oslo to St. Louis, returning Thu, Sep 18, priced at $530 found 3 hours ago
British Airways
Wed, Oct 22 - Wed, Nov 12
OSL
Oslo
STL
St. Louis
$531 Roundtrip, found 5 days ago
$531
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Oct 22 from Oslo to St. Louis, returning Wed, Nov 12, priced at $531 found 5 days ago
Flights from Oslo (OSL) to St. Louis (STL)
Origin airport
Gardermoen
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$500
Distance
4299 mi

Oslo to St. Louis Flights

The cheapest times to fly from Oslo to St. Louis

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 Oslo to St. Louis are during the month of May. You can find some of the cheapest flights from Oslo to St. Louis with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Oslo to St. Louis

Sunday is one of the best days to book for cheap flights from Oslo to St. Louis: 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 Oslo to St. Louis

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 Oslo to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $507 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 Oslo to St. Louis 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 Oslo to St. Louis 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 Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from OSL to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from OSL to STL?
The cheapest flights from OSL to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from OSL to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from OSL to STL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL)?
There are no daily nonstop flights departing from Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you’ll be cruising above the clouds before you know it.
What day of the week has the most flights from OSL to STL?
Typically you’ll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Departures after this time have a 22% higher chance of being 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 Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from OSL to STL shortly before your journey is usually more expensive. But if there’s some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an OSL to STL flight and hotel package?
You’ll typically save money by securing an OSL to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s simple to manage everything in one place. Once you’ve selected your preferred flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Gardermoen Airport (OSL) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can reschedule or cancel your OSL to STL flight. However, there may be additional charges, 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’d like further information, go to our Customer Service portal.

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*Available to One Key members.