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Cheap flights from St. Louis to Europe from $239

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Europe departing on 5/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Europe

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:00 pm
DUB
-
STL
30h 40m
1 stop
$325Aer Lingus
Wed, Sep 9 - Wed, Sep 16
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:00 pm
DUB
-
STL
30h 40m
1 stop
$326Aer Lingus
Sun, Sep 6 - Wed, Sep 16
American Airlines Logo
9:38 am - 6:45 am
STL
-
BCN
14h 07m
2 stops
American Airlines Logo
10:40 am - 10:00 pm
BCN
-
STL
17h 20m
1 stop
$778American Airlines
Mon, Oct 12 - Wed, Oct 28
British Airways Logo
6:51 pm - 10:10 am
STL
-
BCN
32h 19m
1 stop
British Airways Logo
10:40 am - 9:27 am
BCN
-
STL
28h 47m
1 stop
$785British Airways
Sat, Oct 17 - Fri, Oct 30
British Airways Logo
9:35 pm - 4:25 pm
STL
-
FCO
11h 50m
1 stop
British Airways Logo
8:15 pm - 7:30 pm
FCO
-
STL
30h 15m
1 stop
$795British Airways
Tue, Aug 11 - Tue, Aug 18
United Airlines Logo
5:33 pm - 7:55 am
STL
-
FCO
31h 22m
1 stop
United Airlines Logo
2:20 pm - 6:42 pm
FCO
-
STL
35h 22m
1 stop
$806United Airlines
Sat, Aug 8 - Wed, Aug 19
American Airlines Logo
4:32 pm - 2:55 pm
STL
-
FCO
16h 23m
2 stops
American Airlines Logo
7:25 am - 7:29 pm
FCO
-
STL
19h 04m
2 stops
$807American Airlines
Tue, Oct 27 - Tue, Nov 10
United Airlines Logo
7:30 am - 8:00 am
STL
-
BCN
17h 30m
3 stops
United Airlines Logo
12:15 pm - 2:11 pm
BCN
-
STL
32h 56m
2 stops
$837United Airlines
Mon, Sep 28 - Mon, Oct 12
Lufthansa Logo
3:30 pm - 5:55 pm
STL
-
LCY
20h 25m
1 stop
Lufthansa Logo
9:15 am - 9:24 pm
LCY
-
STL
18h 09m
2 stops
$976Lufthansa
Tue, Aug 11 - Wed, Sep 30
Lufthansa Logo
3:30 pm - 5:55 pm
STL
-
LCY
20h 25m
1 stop
Lufthansa Logo
9:15 am - 11:38 pm
LCY
-
STL
20h 23m
2 stops
$977Lufthansa
Wed, Aug 19 - Fri, Aug 28

Finnair flights from St. Louis to Europe

Our best Finnair deals on St. Louis to Europe flight tickets
Finnair
Oct 12
STL4:32 pmLambert-St Louis
11h 03m
1 stop
BCN10:35 amBarcelona-El Prat
Oct 28
BCN10:40 amBarcelona-El Prat
15h 06m
1 stop
STL7:46 pmLambert-St Louis
$755
Finnair
Oct 27
STL12:43 pmLambert-St Louis
16h 02m
1 stop
FCO10:45 amRome Fiumicino
Nov 10
FCO6:40 pmRome Fiumicino
31h 50m
2 stops
STL7:30 pmLambert-St Louis
$799
Finnair
Nov 9
STL1:20 pmLambert-St Louis
12h 30m
1 stop
BCN8:50 amBarcelona-El Prat
Nov 15
BCN10:40 amBarcelona-El Prat
15h 50m
1 stop
STL7:30 pmLambert-St Louis
$814

American Airlines flights from St. Louis to Europe

Our best American Airlines deals on St. Louis to Europe flight tickets
American Airlines
Oct 12
STL9:38 amLambert-St Louis
14h 07m
2 stops
BCN6:45 amBarcelona-El Prat
Oct 28
BCN10:40 amBarcelona-El Prat
17h 20m
1 stop
STL10:00 pmLambert-St Louis
$778
American Airlines
Oct 27
STL4:32 pmLambert-St Louis
16h 23m
2 stops
FCO2:55 pmRome Fiumicino
Nov 10
FCO7:25 amRome Fiumicino
19h 04m
2 stops
STL7:29 pmLambert-St Louis
$807
American Airlines
Nov 9
STL6:00 amLambert-St Louis
20h 10m
1 stop
BCN9:10 amBarcelona-El Prat
Nov 15
BCN11:50 amBarcelona-El Prat
16h 52m
2 stops
STL9:42 pmLambert-St Louis
$828

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Europe that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 18, 2026.
Use the filters below to find and compare flights from St. Louis to Europe that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 9/16

1:20 pm-2:00 pm

1 stop30h 40m

$325

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 9/6

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 9/16

1:20 pm-2:00 pm

1 stop30h 40m

$326
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

9:38 am-6:45 am

2 stops14h 07m

Barcelona-El Prat

Wed 10/28

10:40 am-10:00 pm

1 stop17h 20m

$778

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 10/17

6:51 pm-10:10 am

1 stop32h 19m

Barcelona-El Prat

Fri 10/30

10:40 am-9:27 am

1 stop28h 47m

$785

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 8/11

9:35 pm-4:25 pm

1 stop11h 50m

Rome Fiumicino

Tue 8/18

8:15 pm-7:30 pm

1 stop30h 15m

$795

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 8/8

5:33 pm-7:55 am

1 stop31h 22m

Rome Fiumicino

Wed 8/19

2:20 pm-6:42 pm

1 stop35h 22m

$806

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Tue 10/27

4:32 pm-2:55 pm

2 stops16h 23m

Rome Fiumicino

Tue 11/10

7:25 am-7:29 pm

2 stops19h 04m

$807

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

7:30 am-8:00 am

3 stops17h 30m

Barcelona-El Prat

Mon 10/12

12:15 pm-2:11 pm

2 stops32h 56m

$837

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Tue 8/11

3:30 pm-5:55 pm

1 stop20h 25m

London City

Wed 9/30

9:15 am-9:24 pm

2 stops18h 09m

$976

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Wed 8/19

3:30 pm-5:55 pm

1 stop20h 25m

London City

Fri 8/28

9:15 am-11:38 pm

2 stops20h 23m

$977

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Europe

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Europe?

The cheapest month to fly to Europe from St. Louis is in January. Flight prices, which tend to average around $288, are often lower during this time because this is during the off-season. If you aren’t able to travel to Europe during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $385.

What is the cheapest day to depart on your flight to Europe?

The cheapest day to depart from St. Louis to Europe is on a Thursday. Travelers who choose to depart for Europe on a Thursday will often find tickets for as low as $756. Flights from St. Louis to Europe on a Friday will generally be more expensive and average around $1,109. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Lambert-St Louis to Europe flight route?

Fly from Lambert-St Louis to London Heathrow for the best Lambert-St Louis - Europe flight prices

How far in advance should I book a flight from St. Louis to Europe?

You are more likely to see cheaper flights to Europe from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Europe for around $865 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Europe from St. Louis for as low as $705 on momondo.

Can stopping save me money on St. Louis to Europe flights?

You could potentially save up to 43% on your flight if you consider stops on a St. Louis to Europe flight.

Cheap St. Louis to Europe flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Europe

Best Price Found

$420

Fastest flight time

8h 00m

Direct flights

Mon, Wed, Thu and Sat

Airports in Europe

4,107 airports
The best one-way flight to Europe from St. Louis in the past 72 hours is $420. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $1,080.
The fastest flight from St. Louis to Europe takes 8h 00m
Direct flights go from St. Louis to Europe on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
There are 4,107 airports in Europe. From St. Louis there are direct flights to London Heathrow (LHR).
Search flight deals

Frequently asked questions about flying from St. Louis to Europe

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Europe?

    Prices for flights from Lambert-St Louis Airport to Europe are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Europe?

  • How old do you have to be to fly from Lambert-St Louis Airport to Europe?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Europe.

  • What documentation or ID do you need to fly to Europe?

    The necessary travel and health documents for your Europe trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Europe

Compare and see reviews for airlines that fly from St. Louis to Europe with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $355Free CancellationRating
7.9
8,450 reviews
Search Delta flights
American AirlinesPriceFrom $390Free CancellationRating
7.1
11,645 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
7,986 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
8,010 reviews
Search Lufthansa flights
KLMPriceFrom $507Free CancellationRating
7.8
1,517 reviews
Search KLM flights
Virgin AtlanticPriceFrom $538Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
11,062 reviews
Search Air Canada flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,731 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.4
1,781 reviews
Search Scandinavian Airlines flights
IberiaPriceFrom $568Free CancellationRating
7.0
3,220 reviews
Search Iberia flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Europe?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Europe. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Europe with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Europe flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Europe?

Once you have performed a search for St. Louis to Europe flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Europe right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Europe from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Europe trip

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