$427 Cheap Flights from St. Louis (STL) to Kosice (KSC)

View $427 flight on Fri, Jan 9, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Kosice (KSC-Barca)

Cheap Flights from St. Louis to Kosice (STL-KSC)

Prices were available within the past 7 days and start at $427 for one-way flights and $625 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 24 - Mon, Jan 12
STL
St. Louis
KSC
Kosice
$625 Roundtrip, found 5 days ago
$625
Roundtrip
found 5 days ago
Select United flight, departing Wed, Dec 24 from St. Louis to Kosice, returning Mon, Jan 12, priced at $625 found 5 days ago
United
Fri, Jan 9 - Fri, Mar 27
STL
St. Louis
KSC
Kosice
$629 Roundtrip, found 6 days ago
$629
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 9 from St. Louis to Kosice, returning Fri, Mar 27, priced at $629 found 6 days ago
United
Fri, Jan 9 - Fri, Mar 27
STL
St. Louis
KSC
Kosice
$634 Roundtrip, found 6 days ago
$634
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 9 from St. Louis to Kosice, returning Fri, Mar 27, priced at $634 found 6 days ago
United
Fri, Jan 9 - Fri, Mar 27
STL
St. Louis
KSC
Kosice
$643 Roundtrip, found 6 days ago
$643
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 9 from St. Louis to Kosice, returning Fri, Mar 27, priced at $643 found 6 days ago
United
Sat, Dec 27 - Mon, Jan 12
STL
St. Louis
KSC
Kosice
$698 Roundtrip, found 5 days ago
$698
Roundtrip
found 5 days ago
Select United flight, departing Sat, Dec 27 from St. Louis to Kosice, returning Mon, Jan 12, priced at $698 found 5 days ago
United
Fri, Jan 9 - Fri, Mar 27
STL
St. Louis
KSC
Kosice
$717 Roundtrip, found 6 days ago
$717
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 9 from St. Louis to Kosice, returning Fri, Mar 27, priced at $717 found 6 days ago
United
Wed, Nov 19 - Mon, Nov 24
STL
St. Louis
KSC
Kosice
$717 Roundtrip, found 22 hours ago
$717
Roundtrip
found 22 hours ago
Select United flight, departing Wed, Nov 19 from St. Louis to Kosice, returning Mon, Nov 24, priced at $717 found 22 hours ago
Air Canada
Wed, Nov 19 - Wed, Nov 26
STL
St. Louis
KSC
Kosice
$724 Roundtrip, found 22 hours ago
$724
Roundtrip
found 22 hours ago
Select Air Canada flight, departing Wed, Nov 19 from St. Louis to Kosice, returning Wed, Nov 26, priced at $724 found 22 hours ago
Lufthansa
Fri, Jan 9 - Fri, Mar 27
STL
St. Louis
KSC
Kosice
$738 Roundtrip, found 6 days ago
$738
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Fri, Jan 9 from St. Louis to Kosice, returning Fri, Mar 27, priced at $738 found 6 days ago
Austrian Airlines
Wed, Dec 24 - Fri, Jan 9
STL
St. Louis
KSC
Kosice
$1,202 Roundtrip, found 5 days ago
$1,202
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Wed, Dec 24 from St. Louis to Kosice, returning Fri, Jan 9, priced at $1,202 found 5 days ago

Alternative airports near Kosice

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Barca KSC. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $1,947
KSC
Barca
CheapestClosest
Average driving time to city center11 min
Flights from $1,947

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC) cost?
Snag a cheap one-way flight from $427 or cheap return flight from $625 from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC)?
December is the cheapest month to fly from STL to KSC. Planning your trip for the off-season is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to KSC flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC)?
There are no daily direct flights available from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from STL to KSC?
Usually you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can change based on the airline, season 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 Barca Airport (KSC)?
To arrive at Barca Airport (KSC) on time, choose a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Barca Airport (KSC) last-minute?
Booking your plane ticket from STL to KSC just before your journey is generally more expensive. But if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to KSC flight and hotel package?
Securing a STL to KSC flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Barca Airport (KSC)?
Typically, it's possible to cancel or reschedule your STL to KSC flight. However, if the booking was made more than 24 hours ago, additional charges 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 details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Barca
Airlines serving
Austrian Airlines, Lufthansa
Roundtrip price
$624
Distance
5093 mi

Book with confidence

St. Louis to Kosice Flights

The cheapest times to fly from St. Louis to Kosice

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

 

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

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

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 Kosice in 2025. You can also book with separate airlines for your outbound and return journeys, from $427 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 Kosice 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 Kosice 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.

 

St. Louis to Kosice Flights

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*Available to One Key members.