How does KAYAK find such low prices on flights from Europe to St. Louis?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Europe to St. Louis.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Europe to St. Louis?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Europe is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Europe to St. Louis?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Europe with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Europe to St. Louis?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$483 CHEAP FLIGHTS from Europe to St. Louis

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Cheap Flights from Europe to St. Louis

Cheap flights from Europe to St. Louis with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Thu, Oct 22 - Mon, Oct 26

6:45 am - 7:21 pmOSL Oslo Gardermoen-STL Lambert-St Louis

19h 36m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

6:50 pm - 5:30 pmSTL Lambert-St Louis-OSL Oslo Gardermoen

16h 40m2 stops Chicago O'Hare Intl Frankfurt am Main

$674Lufthansa

Thu, Oct 22 - Mon, Oct 26

7:15 pm - 1:25 pmOSL Oslo Gardermoen-STL Lambert-St Louis

25h 10m1 stop Frankfurt am Main

1:08 pm - 3:45 pmSTL Lambert-St Louis-OSL Oslo Gardermoen

20h 37m2 stops Chicago O'Hare Intl Frankfurt am Main

$698Lufthansa

Wed, Nov 25 - Wed, Dec 2

6:15 am - 1:45 pmOSL Oslo Gardermoen-STL Lambert-St Louis

14h 30m1 stop Frankfurt am Main

6:30 am - 1:05 pmSTL Lambert-St Louis-OSL Oslo Gardermoen

23h 35m2 stops Chicago O'Hare Intl Frankfurt am Main

$726United Airlines

Sun, Nov 22 - Wed, Dec 2

6:15 am - 1:45 pmOSL Oslo Gardermoen-STL Lambert-St Louis

14h 30m1 stop Frankfurt am Main

6:30 am - 1:05 pmSTL Lambert-St Louis-OSL Oslo Gardermoen

23h 35m2 stops Chicago O'Hare Intl Frankfurt am Main

$726United Airlines

Mon, Nov 2 - Mon, Nov 9

10:50 am - 5:29 pmFRA Frankfurt am Main-STL Lambert-St Louis

13h 39m1 stop Charlotte Douglas

9:50 am - 10:30 amSTL Lambert-St Louis-FRA Frankfurt am Main

17h 40m2 stops Boston Logan Intl London Heathrow

$745British Airways

Tue, Nov 3 - Tue, Nov 10

10:50 am - 9:57 pmFRA Frankfurt am Main-STL Lambert-St Louis

18h 07m1 stop Charlotte Douglas

9:50 am - 10:25 amSTL Lambert-St Louis-FRA Frankfurt am Main

17h 35m2 stops Boston Logan Intl London Heathrow

$747British Airways

Thu, Nov 26 - Wed, Dec 9

7:05 pm - 10:53 pmDUB Dublin-STL Lambert-St Louis

33h 48m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson

12:36 pm - 6:20 pmSTL Lambert-St Louis-DUB Dublin

23h 44m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen

$761Scandinavian Airlines

Fri, Nov 6 - Sat, Nov 14

4:25 am - 11:16 pmDUB Dublin-STL Lambert-St Louis

24h 51m2 stops Lisbon Humberto Delgado Orlando

4:26 pm - 11:20 pmSTL Lambert-St Louis-DUB Dublin

24h 54m2 stops Orlando Lisbon Humberto Delgado

$762Multiple Airlines

Fri, Nov 6 - Sun, Nov 22

10:35 am - 7:22 pmCDG Paris Charles de Gaulle-STL Lambert-St Louis

15h 47m2 stops London Heathrow Chicago O'Hare Intl

5:29 pm - 2:00 pmSTL Lambert-St Louis-CDG Paris Charles de Gaulle

13h 31m2 stops Chicago O'Hare Intl London Heathrow

$778American Airlines

Thu, Nov 5 - Wed, Nov 18

2:30 pm - 11:55 pmCDG Paris Charles de Gaulle-STL Lambert-St Louis

16h 25m2 stops London Heathrow Chicago O'Hare Intl

9:12 am - 6:35 amSTL Lambert-St Louis-CDG Paris Charles de Gaulle

14h 23m1 stop New York LaGuardia

$786American Airlines

Thu, Oct 15 - Mon, Oct 19

6:00 am - 8:51 pmVCE Venice Marco Polo-STL Lambert-St Louis

21h 51m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

12:00 pm - 1:20 pmSTL Lambert-St Louis-VCE Venice Marco Polo

18h 20m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

$842Delta

Thu, Oct 15 - Mon, Oct 19

6:00 am - 4:28 pmVCE Venice Marco Polo-STL Lambert-St Louis

17h 28m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

7:00 am - 8:55 amSTL Lambert-St Louis-VCE Venice Marco Polo

18h 55m1 stop Atlanta Hartsfield-Jackson

$846Delta

Thu, Oct 15 - Mon, Oct 19

11:05 am - 11:54 pmVCE Venice Marco Polo-STL Lambert-St Louis

19h 49m1 stop Atlanta Hartsfield-Jackson

12:00 pm - 8:55 amSTL Lambert-St Louis-VCE Venice Marco Polo

13h 55m1 stop Atlanta Hartsfield-Jackson

$906Air France

Wed, Oct 14 - Sun, Oct 18

10:20 am - 7:41 pmFCO Rome Fiumicino-STL Lambert-St Louis

16h 21m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

1:36 pm - 12:20 pmSTL Lambert-St Louis-FCO Rome Fiumicino

15h 44m1 stop Denver Intl

$976United Airlines

Wed, Oct 14 - Sun, Oct 18

12:55 pm - 9:09 pmFCO Rome Fiumicino-STL Lambert-St Louis

15h 14m1 stop Newark

9:30 am - 7:35 amSTL Lambert-St Louis-FCO Rome Fiumicino

15h 05m1 stop Newark

$976United Airlines

Thu, Oct 15 - Wed, Oct 28

6:25 am - 9:46 pmVCE Venice Marco Polo-STL Lambert-St Louis

22h 21m2 stops Madrid Barajas New York John F Kennedy Intl

11:32 am - 1:20 pmSTL Lambert-St Louis-VCE Venice Marco Polo

19h 48m2 stops Chicago O'Hare Intl London Heathrow

$1,058American Airlines

Thu, Oct 15 - Tue, Oct 27

6:25 am - 9:46 pmVCE Venice Marco Polo-STL Lambert-St Louis

22h 21m2 stops Madrid Barajas New York John F Kennedy Intl

3:30 pm - 7:40 pmSTL Lambert-St Louis-VCE Venice Marco Polo

22h 10m2 stops Charlotte Douglas London Heathrow

$1,058American Airlines

Tue, Oct 13 - Sat, Oct 17

10:35 am - 11:04 pmCDG Paris Charles de Gaulle-STL Lambert-St Louis

19h 29m2 stops London Heathrow Charlotte Douglas

7:10 pm - 10:00 amSTL Lambert-St Louis-CDG Paris Charles de Gaulle

31h 50m1 stop Dallas/Fort Worth

$1,274British Airways

Tue, Oct 13 - Tue, Oct 13

11:35 am - 5:01 pmDUB Dublin-STL Lambert-St Louis

11h 26m1 stop Chicago O'Hare Intl

7:01 pm - 9:45 amSTL Lambert-St Louis-DUB Dublin

32h 44m1 stop Chicago O'Hare Intl

$1,550Lufthansa

Sun, Oct 11 - Sun, Oct 18

4:25 pm - 7:30 pmLHR London Heathrow-STL Lambert-St Louis

9h 05mnonstop

9:40 pm - 11:40 amSTL Lambert-St Louis-LHR London Heathrow

8h 00mnonstop

$1,873British Airways

Fri, Nov 20 - Fri, Nov 27

10:45 am - 1:45 pmFRA Frankfurt am Main-STL Lambert-St Louis

10h 00mnonstop