$507 Cheap Flights from St. Louis (STL) to Belgrade (BEG)

View $507 flight on Mon, Sep 1, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Nikola Tesla Airport (BEG)

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Find available prices by choosing your travel dates.

Cheap Flights from St. Louis to Belgrade (STL-BEG)

Prices were available within the past 7 days and start at $507 for one-way flights and $665 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, Aug 10 - Thu, Aug 21
STL
St. Louis
BEG
Belgrade
$665 Roundtrip, found 3 days ago
$665
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Aug 10 from St. Louis to Belgrade, returning Thu, Aug 21, priced at $665 found 3 days ago
Air Canada
Sun, Aug 10 - Wed, Aug 20
STL
St. Louis
BEG
Belgrade
$676 Roundtrip, found 3 days ago
$676
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Aug 10 from St. Louis to Belgrade, returning Wed, Aug 20, priced at $676 found 3 days ago
Delta
Tue, Aug 12 - Tue, Aug 26
STL
St. Louis
BEG
Belgrade
$680 Roundtrip, found 3 days ago
$680
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 12 from St. Louis to Belgrade, returning Tue, Aug 26, priced at $680 found 3 days ago
Lufthansa
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$680 Roundtrip, found 3 days ago
$680
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $680 found 3 days ago
Air Canada
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$682 Roundtrip, found 3 days ago
$682
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $682 found 3 days ago
Air Canada
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$684 Roundtrip, found 3 days ago
$684
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $684 found 3 days ago
Air Canada
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$686 Roundtrip, found 3 days ago
$686
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $686 found 3 days ago
Lufthansa
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$688 Roundtrip, found 3 days ago
$688
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $688 found 3 days ago
United
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$690 Roundtrip, found 3 days ago
$690
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $690 found 3 days ago
KLM
Mon, Aug 11 - Fri, Aug 22
STL
St. Louis
BEG
Belgrade
$731 Roundtrip, found 3 days ago
$731
Roundtrip
found 3 days ago
Select KLM flight, departing Mon, Aug 11 from St. Louis to Belgrade, returning Fri, Aug 22, priced at $731 found 3 days ago
Flights from St. Louis (STL) to Belgrade (BEG)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Nikola Tesla
Airlines serving
Air Canada, Air France, Austrian Airlines, Delta, KLM, Lufthansa, Turkish Airlines, United
Roundtrip price
$665
Distance
5234 mi

St. Louis to Belgrade Flights

The cheapest times to fly from St. Louis to Belgrade

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

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

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

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 Belgrade 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 St. Louis to Belgrade 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 Belgrade 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 Nikola Tesla Airport (BEG) cost?
Discover the latest flight deals from STL to BEG 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 BEG?
The cheapest flights from STL to BEG 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 BEG?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to BEG. 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 Nikola Tesla Airport (BEG)?
There aren’t any daily nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to Nikola Tesla Airport (BEG). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you’ll be on your way in no time at all.
What day of the week has the most flights from STL to BEG?
Typically you’ll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* But this can vary based on the season, carrier 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 Lambert-St. Louis Intl. Airport (STL) to Nikola Tesla Airport (BEG)?
Opt for a flight from Lambert-St. Louis Intl. Airport (STL) to Nikola Tesla Airport (BEG) that leaves before 3 PM to reduce the risk of delays and 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 Nikola Tesla Airport (BEG) last-minute?
Holding off until right before your break to book a flight from STL to BEG generally means paying more. Although you may find some last-minute discounts, there’s no guarantee. Keep your travel plans flexible for the best chance of snagging a bargain.
Is it cheaper to book a STL to BEG flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to BEG flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the hassle out of planning your trip. Just pick your flights and select from our wide range of hotels, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Nikola Tesla Airport (BEG)?
It’s usually possible to reschedule or cancel your STL to BEG flight. However, if it’s been more than 24 hours since booking, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.