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Cheap flights from St. Louis to Europe from $226

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 7/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
4:15 pm - 5:10 am
STL
-
DUB
30h 55m
1 stop
Aer Lingus Logo
1:00 pm - 3:30 pm
DUB
-
STL
32h 30m
1 stop
$350Aer Lingus
lun., nov. 9 - mer., nov. 18
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:02 pm
DUB
-
STL
30h 42m
1 stop
$354Aer Lingus
mar., août 11 - mer., août 19
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:22 pm
DUB
-
STL
13h 02m
1 stop
$357Aer Lingus
mar., août 11 - ven., août 21
United Airlines Logo
1:30 pm - 11:55 am
STL
-
FCO
15h 25m
1 stop
United Airlines Logo
1:15 pm - 12:40 pm
FCO
-
STL
30h 25m
2 stops
$770United Airlines
lun., nov. 9 - mer., nov. 18
Lufthansa Logo
3:30 pm - 5:50 pm
STL
-
FCO
19h 20m
1 stop
Lufthansa Logo
6:50 am - 1:25 pm
FCO
-
STL
13h 35m
1 stop
$772Lufthansa
lun., août 3 - mer., août 19
United Airlines Logo
1:27 pm - 7:45 am
STL
-
FCO
11h 18m
1 stop
United Airlines Logo
11:15 am - 12:20 pm
FCO
-
STL
32h 05m
2 stops
$775United Airlines
dim., déc. 6 - jeu., déc. 10
British Airways Logo
3:59 pm - 4:40 pm
STL
-
FRA
17h 41m
2 stops
British Airways Logo
10:55 am - 12:05 am
FRA
-
STL
20h 10m
1 stop
$836British Airways
mer., nov. 4 - ven., nov. 13
British Airways Logo
7:00 am - 7:15 am
STL
-
FRA
17h 15m
1 stop
British Airways Logo
10:15 am - 7:30 pm
FRA
-
STL
16h 15m
1 stop
$838British Airways
mer., nov. 4 - ven., nov. 13
Lufthansa Logo
12:20 pm - 5:55 pm
STL
-
LCY
23h 35m
2 stops
Lufthansa Logo
9:50 am - 12:34 am
LCY
-
STL
19h 44m
2 stops
$1,073Lufthansa
mer., oct. 21 - mer., oct. 28
American Airlines Logo
9:35 pm - 11:35 am
STL
-
LHR
8h 00mnonstop
American Airlines Logo
4:25 pm - 7:30 pm
LHR
-
STL
9h 05mnonstop
$1,085American Airlines
mer., août 26 - mer., sept. 2

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Finnair flights from St. Louis to Europe

Our best Finnair deals on St. Louis to Europe flight tickets
Finnair
Nov 9
STL1:20 pmLambert-St Louis
14h 25m
1 stop
FCO10:45 amRome Fiumicino
Nov 18
FCO6:40 pmRome Fiumicino
31h 50m
2 stops
STL7:30 pmLambert-St Louis
$798
Finnair
Aug 9
STL12:45 pmLambert-St Louis
13h 00m
1 stop
FRA8:45 amFrankfurt am Main
Aug 25
FRA11:30 amFrankfurt am Main
19h 44m
2 stops
STL12:14 amLambert-St Louis
$889
Finnair
Aug 26
STL9:35 pmLambert-St Louis
8h 00m
LHR11:35 amLondon Heathrow
Sep 2
LHR4:25 pmLondon Heathrow
9h 05m
STL7:30 pmLambert-St Louis
$1,088

Air Canada flights from St. Louis to Europe

Our best Air Canada deals on St. Louis to Europe flight tickets
Air Canada
Oct 26
STL6:45 pmLambert-St Louis
30h 25m
2 stops
DUB6:10 amDublin
Nov 4
DUB9:00 amDublin
35h 18m
2 stops
STL2:18 pmLambert-St Louis
$687
Air Canada
Oct 25
STL9:23 amLambert-St Louis
15h 47m
2 stops
DUB6:10 amDublin
Nov 6
DUB9:00 amDublin
12h 30m
1 stop
STL3:30 pmLambert-St Louis
$696
Air Canada
Oct 27
STL9:23 amLambert-St Louis
15h 47m
2 stops
DUB6:10 amDublin
Nov 4
DUB9:00 amDublin
12h 30m
1 stop
STL3:30 pmLambert-St Louis
$700

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 juin 17, 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

lun. 11/9

4:15 pm-5:10 am

1 stop30h 55m

Dublin

mer. 11/18

1:00 pm-3:30 pm

1 stop32h 30m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 8/11

8:55 am-5:10 am

1 stop14h 15m

Dublin

mer. 8/19

1:20 pm-2:02 pm

1 stop30h 42m

$354

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 8/11

8:55 am-5:10 am

1 stop14h 15m

Dublin

ven. 8/21

1:20 pm-8:22 pm

1 stop13h 02m

$357

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

lun. 11/9

1:30 pm-11:55 am

1 stop15h 25m

Rome Fiumicino

mer. 11/18

1:15 pm-12:40 pm

2 stops30h 25m

$770

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

lun. 8/3

3:30 pm-5:50 pm

1 stop19h 20m

Rome Fiumicino

mer. 8/19

6:50 am-1:25 pm

1 stop13h 35m

$772

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

dim. 12/6

1:27 pm-7:45 am

1 stop11h 18m

Rome Fiumicino

jeu. 12/10

11:15 am-12:20 pm

2 stops32h 05m

$775

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

mer. 11/4

3:59 pm-4:40 pm

2 stops17h 41m

Frankfurt am Main

ven. 11/13

10:55 am-12:05 am

1 stop20h 10m

$836

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

mer. 11/4

7:00 am-7:15 am

1 stop17h 15m

Frankfurt am Main

ven. 11/13

10:15 am-7:30 pm

1 stop16h 15m

$838

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

mer. 10/21

12:20 pm-5:55 pm

2 stops23h 35m

London City

mer. 10/28

9:50 am-12:34 am

2 stops19h 44m

$1,073
Quickest round-trip

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

mer. 8/26

9:35 pm-11:35 am

Nonstop8h 00m

London Heathrow

mer. 9/2

4:25 pm-7:30 pm

Nonstop9h 05m

$1,085

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 $1,165. 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 $883 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 $738 on momondo.

What cabin class options are available on St. Louis to Europe flights?

There are 3 cabin classes available to choose from on St. Louis to Europe flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 41% 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

$374

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 $374. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $1,061.
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
British AirwaysPriceFrom $470Free CancellationRating
6.7
8,054 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
8,069 reviews
Search Lufthansa flights
DeltaPriceFrom $483Free CancellationRating
7.8
8,410 reviews
Search Delta flights
American AirlinesPriceFrom $505Free CancellationRating
7.1
11,682 reviews
Search American Airlines flights
KLMPriceFrom $507Free CancellationRating
7.8
1,530 reviews
Search KLM flights
IberiaPriceFrom $523Free CancellationRating
7.0
3,238 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $538Free CancellationRating
7.5
690 reviews
Search Virgin Atlantic flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
11,210 reviews
Search Air Canada flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,858 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.4
1,830 reviews
Search Scandinavian Airlines 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.

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Find better results for your trip to Europe

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