$470 Cheap Flights from St. Louis (STL) to Prague (PRG)

View $470 flight on Sun, Sep 7, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Vaclav Havel Airport (PRG)

Cheap Flights from St. Louis to Prague (STL-PRG)

Prices were available within the past 7 days and start at $470 for one-way flights and $614 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Oct 20 - Wed, Nov 5
STL
St. Louis
PRG
Prague
$614 Roundtrip, found 1 day ago
$614
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 20 from St. Louis to Prague, returning Wed, Nov 5, priced at $614 found 1 day ago
United
Mon, Jan 12 - Fri, Jan 23
STL
St. Louis
PRG
Prague
$615 Roundtrip, found 19 hours ago
$615
Roundtrip
found 19 hours ago
Select United flight, departing Mon, Jan 12 from St. Louis to Prague, returning Fri, Jan 23, priced at $615 found 19 hours ago
Lufthansa
Wed, Nov 26 - Wed, Dec 3
STL
St. Louis
PRG
Prague
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Wed, Nov 26 from St. Louis to Prague, returning Wed, Dec 3, priced at $616 found 5 days ago
Lufthansa
Mon, Nov 17 - Wed, Nov 26
STL
St. Louis
PRG
Prague
$617 Roundtrip, found 6 days ago
$617
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Nov 17 from St. Louis to Prague, returning Wed, Nov 26, priced at $617 found 6 days ago
Lufthansa
Wed, Jan 7 - Wed, Jan 14
STL
St. Louis
PRG
Prague
$618 Roundtrip, found 6 hours ago
$618
Roundtrip
found 6 hours ago
Select Lufthansa flight, departing Wed, Jan 7 from St. Louis to Prague, returning Wed, Jan 14, priced at $618 found 6 hours ago
Lufthansa
Mon, Jan 12 - Fri, Jan 23
STL
St. Louis
PRG
Prague
$619 Roundtrip, found 19 hours ago
$619
Roundtrip
found 19 hours ago
Select Lufthansa flight, departing Mon, Jan 12 from St. Louis to Prague, returning Fri, Jan 23, priced at $619 found 19 hours ago
United
Sun, Feb 1 - Wed, Feb 18
STL
St. Louis
PRG
Prague
$621 Roundtrip, found 1 day ago
$621
Roundtrip
found 1 day ago
Select United flight, departing Sun, Feb 1 from St. Louis to Prague, returning Wed, Feb 18, priced at $621 found 1 day ago
American Airlines
Mon, Jan 12 - Fri, Jan 23
STL
St. Louis
PRG
Prague
$623 Roundtrip, found 19 hours ago
$623
Roundtrip
found 19 hours ago
Select American Airlines flight, departing Mon, Jan 12 from St. Louis to Prague, returning Fri, Jan 23, priced at $623 found 19 hours ago
Air Canada
Wed, Nov 19 - Wed, Dec 3
STL
St. Louis
PRG
Prague
$623 Roundtrip, found 3 hours ago
$623
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Wed, Nov 19 from St. Louis to Prague, returning Wed, Dec 3, priced at $623 found 3 hours ago
Iberia
Wed, Nov 19 - Wed, Dec 3
STL
St. Louis
PRG
Prague
$623 Roundtrip, found 3 hours ago
$623
Roundtrip
found 3 hours ago
Select Iberia flight, departing Wed, Nov 19 from St. Louis to Prague, returning Wed, Dec 3, priced at $623 found 3 hours ago

Find the cheapest month to fly from St. Louis (STL) to Prague (PRG)

August is typically the cheapest month to fly

From $585 - $1,748 per traveler.

Graph displaying average flight prices per month

Alternative airports near Prague

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

Select flight to Vaclav Havel PRG. Cheapest and Closest option available. Average driving time to city center is 19 minutes. Flights from $706
PRG
Vaclav Havel
CheapestClosest
Average driving time to city center19 min
Flights from $706
Flights from St. Louis (STL) to Prague (PRG)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Vaclav Havel
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$614
Distance
4786 mi

St. Louis to Prague Flights

The cheapest times to fly from St. Louis to Prague

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

 

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

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

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 Prague in 2025. You can also book with separate airlines for your outbound and return journeys, from $470 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 Prague 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 Prague 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 Vaclav Havel Airport (PRG) cost?
Grab a cheap one-way flight from $470 or cheap return flight from $614 from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG)?
October is the most affordable month to fly from STL to PRG. Traveling outside of peak seasons is often the key to better flight prices.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG)?
To find the cheapest airline flying from STL to PRG, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to PRG?
Usually you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can vary based on the time of year, 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 Vaclav Havel Airport (PRG)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG) route, fly before 3 PM. Flights after this time are 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 Vaclav Havel Airport (PRG) last-minute?
Holding off until just before your trip to book a flight from STL to PRG often results in higher prices. While it's possible to find some last-minute discounts, they aren't always guaranteed. Be flexible with your travel plans for a better chance of snagging a bargain.
Is it cheaper to book a STL to PRG flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to PRG flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the stress out of planning your trip. Simply pick your flights and choose from our wide range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Vaclav Havel Airport (PRG)?
Usually, it's possible to cancel or reschedule your STL to PRG flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.