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Cheap flights from Billund to St. Louis from $568

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Billund to St. Louis departing on 2/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:35 am - 10:14 pm
BLL
-
STL
18h 39m
2 stops
United Airlines Logo
9:55 am - 1:25 pm
STL
-
BLL
20h 30m
2 stops
$568United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
10:35 am - 9:23 am
BLL
-
STL
29h 48m
2 stops
United Airlines Logo
12:15 pm - 1:25 pm
STL
-
BLL
18h 10m
2 stops
$569United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
6:45 am - 7:14 pm
BLL
-
STL
19h 29m
2 stops
United Airlines Logo
12:15 pm - 10:00 am
STL
-
BLL
14h 45m
2 stops
$570United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
2:15 pm - 1:55 pm
BLL
-
STL
30h 40m
1 stop
United Airlines Logo
8:30 am - 1:25 pm
STL
-
BLL
21h 55m
2 stops
$585United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
2:15 pm - 8:23 pm
BLL
-
STL
37h 08m
2 stops
United Airlines Logo
8:30 am - 10:00 am
STL
-
BLL
18h 30m
2 stops
$736United Airlines
Sat, Feb 28 - Wed, Mar 4

United Airlines flights from Billund to St. Louis

Our best United Airlines deals on Billund to St. Louis flight tickets
United Airlines
Feb 28
BLL10:35 amBillund
18h 39m
2 stops
STL10:14 pmLambert-St Louis
Mar 4
STL9:55 amLambert-St Louis
20h 30m
2 stops
BLL1:25 pmBillund
$568
United Airlines
Feb 28
BLL10:35 amBillund
29h 48m
2 stops
STL9:23 amLambert-St Louis
Mar 4
STL12:15 pmLambert-St Louis
18h 10m
2 stops
BLL1:25 pmBillund
$569
United Airlines
Feb 28
BLL6:45 amBillund
19h 29m
2 stops
STL7:14 pmLambert-St Louis
Mar 4
STL12:15 pmLambert-St Louis
14h 45m
2 stops
BLL10:00 amBillund
$570

momondo Fare Finder

 
Customize your flight search to find flights from Billund to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 4, 2026.
Use the filters below to find and compare flights from Billund to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 2/28

10:35 am-10:14 pm

2 stops18h 39m

Lambert-St Louis

Wed 3/4

9:55 am-1:25 pm

2 stops20h 30m

$568

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 2/28

10:35 am-9:23 am

2 stops29h 48m

Lambert-St Louis

Wed 3/4

12:15 pm-1:25 pm

2 stops18h 10m

$569

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 2/28

6:45 am-7:14 pm

2 stops19h 29m

Lambert-St Louis

Wed 3/4

12:15 pm-10:00 am

2 stops14h 45m

$570

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 2/28

2:15 pm-1:55 pm

1 stop30h 40m

Lambert-St Louis

Wed 3/4

8:30 am-1:25 pm

2 stops21h 55m

$585

BillundSt. Louis

BLL - STL

BLLSTL

Billund

Sat 2/28

2:15 pm-8:23 pm

2 stops37h 08m

Lambert-St Louis

Wed 3/4

8:30 am-10:00 am

2 stops18h 30m

$736

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to St. Louis from

How to get the cheapest flight ticket from Billund to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Billund and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, March is the cheapest month to fly from Billund to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $432. The month of August is another great option to travel to St. Louis, with average flight prices from Billund averaging around $564.

When to book flights from Billund to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Billund to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Billund to St. Louis (BLL to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Billund to St. Louis

Fastest flight time

18h 39m

Direct flights

None
The fastest flight from Billund to St. Louis takes 18h 39m
There are no direct flights from Billund to St. Louis. There are no popular flight routes from Billund to St. Louis.
Search flight deals

  • How far is Billund to Lambert-St Louis by plane?

    Lambert-St Louis is 4391.1 mi away from Billund. A reasonable flight in good conditions will take 18h 39m.

  • When did momondo last update prices for flights from Billund Airport to Lambert-St Louis Airport?

    Prices for flights from Billund Airport to Lambert-St Louis Airport are updated daily.

  • How old do you have to be to fly from Billund Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Billund Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Billund to St. Louis?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Billund to St. Louis for you.

Can I find flights from Billund to St. Louis with flexible booking policies on momondo?

All flight searches from Billund to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Billund to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Billund.

I’m not ready to book a flight from Billund to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Billund to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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