The cheapest times to fly from STL to PRG are

  • January 1st to April 1st
  • September 10th to December 9th (except the week of September 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from STL to PRG is late January and early February. Prices can be as high as $1213 for Saturday flights during mid December, or as low as $763 for Tuesday flights around late January and early February.


When to Fly to Prague

Flying from St. Louis, MO (STL) to Prague (PRG) will usually cost between $769 to $1077 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January and early February with an average ticket price of $788. Due to high demand the most expensive time to fly is mid December, with an average price of $1071. Planning your trip to low-cost times can easily save you $283 on economy flights and even more on first-class flights. Generally, any price below $875 can be considered a good price for a round-trip STL to PRG flight.

See below for a graph of average weekly prices for the STL to PRG route. All prices are for round-trip tickets in USD.

STL to PRG Flight Prices

Compared to other flights, the STL to PRG flight is cheaper than the average and costs about as much as the average flight leaving from St. Louis. The average price per mile (for a direct flight) is $0.11, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $113 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $832. Return trip prices are from the PRG to STL flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from STL to PRG can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 36 minutes may not be realistic.


Flight Hacking STL to PRG

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from STL to PRG — but Champion Traveler does!

Hack #1: New York, NY (STL > JFK > PRG)

  • Price for both tickets: $835
  • Average savings: $40 (4.57%)

See STL to JFK flights


Flight Questions Answered

Still have questions about flying from STL to PRG? We’ve got answers.

Which airlines fly this route?

You can find 22 major airlines flying this route most often: Aer Lingus, Air Canada, Air France, Alaska, Alitalia, American, Austrian, British Airways, Brussels Airlines, CSA, Delta, Finnair, Iberia, Icelandair, KLM, LOT, Lufthansa, SAS, SWISS, Tap Air Portugal, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from Ruzyne Airport to St Louis Lambert International Airport?

The distance between the two airports is roughly 4786 miles or 7702 kilometers.

How long does it take to fly from STL to PRG?

The real-world flight time for a nonstop STL to PRG flight is about 9 hour 36 minutes.

How many flights go between St. Louis, MO and Prague?

It depends on the day of the week and the date, but a typical day might have around 78 available flights from STL to PRG.


Airport Location Info


Departing Airport

Origination codeSTL
Origination airport nameSt Louis Lambert International Airport
CitySt. Louis, MO
Countrythe United States

Return Airport

Destination codePRG
Destination airport nameRuzyne Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.