$535 Cheap Flights from St. Louis (STL) to Billund (BLL)

View $535 flight on Sun, Aug 10, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Billund (BLL)

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Cheap Flights from St. Louis to Billund (STL-BLL)

Prices were available within the past 7 days and start at $535 for one-way flights and $816 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$816 Roundtrip, found 7 hours ago
$816
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $816 found 7 hours ago
United
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$816 Roundtrip, found 7 hours ago
$816
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $816 found 7 hours ago
United
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$820 Roundtrip, found 7 hours ago
$820
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $820 found 7 hours ago
United
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$826 Roundtrip, found 7 hours ago
$826
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $826 found 7 hours ago
United
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$827 Roundtrip, found 7 hours ago
$827
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $827 found 7 hours ago
Lufthansa
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$831 Roundtrip, found 7 hours ago
$831
Roundtrip
found 7 hours ago
Select Lufthansa flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $831 found 7 hours ago
United
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$837 Roundtrip, found 7 hours ago
$837
Roundtrip
found 7 hours ago
Select United flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $837 found 7 hours ago
Air France
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$858 Roundtrip, found 7 hours ago
$858
Roundtrip
found 7 hours ago
Select Air France flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $858 found 7 hours ago
Air France
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$858 Roundtrip, found 7 hours ago
$858
Roundtrip
found 7 hours ago
Select Air France flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $858 found 7 hours ago
Delta
Mon, Sep 15 - Wed, Oct 1
STL
St. Louis
BLL
Billund
$863 Roundtrip, found 7 hours ago
$863
Roundtrip
found 7 hours ago
Select Delta flight, departing Mon, Sep 15 from St. Louis to Billund, returning Wed, Oct 1, priced at $863 found 7 hours ago
Flights from St. Louis (STL) to Billund (BLL)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Billund
Airlines serving
Air Canada, Air France, Delta, KLM, Lufthansa
Roundtrip price
$815
Distance
4393 mi

St. Louis to Billund Flights

The cheapest times to fly from St. Louis to Billund

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

 

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

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

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 St. Louis to Billund in 2025. You can also book with separate airlines for your outbound and return journeys, from $535 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 St. Louis to Billund 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 St. Louis to Billund 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 Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL) cost?
Discover the latest flight deals from STL to BLL 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 STL to BLL?
The cheapest flights from STL to BLL 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 STL to BLL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to BLL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL)?
There are no daily nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from STL to BLL?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on a number of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this 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 Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL) last-minute?
Waiting until just before your trip to book a flight from STL to BLL often results in higher prices. While you may find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible to maximize your chances of landing a bargain.
Is it cheaper to book a STL to BLL flight and hotel package?
You'll typically save money by booking a STL to BLL 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 it all in one place. After selecting your ideal accommodations and flights, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Billund Airport (BLL)?
Typically, you can cancel or modify your STL to BLL flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like more information, head to our Customer Service portal.

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*Available to One Key members.