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Cheap flights from St. Louis to Europe from $268

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 1/21. 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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Find the cheapest flights from St. Louis to Europe

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
9:00 am - 7:45 amSTL-DUB
16h 45m1 stop
KLM Logo
9:45 am - 4:49 pmDUB-STL
13h 04m1 stop
$433KLM
Find Deal
Tue, Dec 2 - Tue, Dec 9
Lufthansa Logo
6:42 pm - 11:00 pmSTL-FCO
21h 18m2 stops
Lufthansa Logo
7:05 am - 1:55 pmFCO-STL
13h 50m1 stop
$435Lufthansa
Find Deal
Mon, Dec 8 - Wed, Dec 24
Delta Logo
9:00 am - 7:45 amSTL-DUB
16h 45m1 stop
Delta Logo
10:45 am - 8:47 pmDUB-STL
16h 02m2 stops
$438Delta
Find Deal
Tue, Dec 2 - Tue, Dec 9
Delta Logo
6:00 am - 8:00 amSTL-BCN
19h 00m2 stops
Delta Logo
10:15 am - 9:08 amBCN-STL
29h 53m2 stops
$449Delta
Find Deal
Sun, Feb 1 - Tue, Feb 17
United Airlines Logo
5:24 pm - 8:10 amSTL-DUB
32h 46m1 stop
United Airlines Logo
9:00 am - 4:28 pmDUB-STL
37h 28m2 stops
$455United Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 8
United Airlines Logo
8:30 am - 8:20 amSTL-BCN
16h 50m1 stop
United Airlines Logo
1:35 pm - 10:45 pmBCN-STL
40h 10m2 stops
$461United Airlines
Find Deal
Thu, Dec 4 - Thu, Dec 11
Air Canada Logo
7:41 am - 7:10 amSTL-DUB
17h 29m2 stops
Air Canada Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$470Air Canada
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Sat, Feb 21 - Sat, Feb 28
American Airlines Logo
2:54 pm - 10:15 amSTL-DUB
13h 21m2 stops
American Airlines Logo
11:30 am - 10:44 pmDUB-STL
17h 14m1 stop
$474American Airlines
Find Deal
Thu, Jan 8 - Tue, Jan 13
Air Canada Logo
12:31 pm - 9:35 amSTL-BCN
14h 04m2 stops
Air Canada Logo
1:35 pm - 3:29 pmBCN-STL
32h 54m2 stops
$480Air Canada
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Wed, Nov 26 - Thu, Dec 4
American Airlines Logo
2:19 pm - 1:20 pmSTL-AMS
16h 01m2 stops
American Airlines Logo
1:05 pm - 10:18 pmAMS-STL
15h 13m2 stops
$508American Airlines
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Sun, Mar 1 - Tue, Mar 10

Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets
Lufthansa
Dec 8
STL6:42 pmLambert-St Louis
21h 18m
2 stops
FCO11:00 pmRome Fiumicino
Dec 24
FCO7:05 amRome Fiumicino
13h 50m
1 stop
STL1:55 pmLambert-St Louis
$435
Find similar
Lufthansa
Nov 10
STL12:31 pmLambert-St Louis
16h 29m
2 stops
BCN12:00 pmBarcelona-El Prat
Nov 26
BCN6:50 amBarcelona-El Prat
14h 05m
1 stop
STL1:55 pmLambert-St Louis
$439
Find similar
Lufthansa
Nov 11
STL6:43 pmLambert-St Louis
22h 57m
2 stops
ATH1:40 amAthens Eleftherios V.
Nov 26
ATH6:15 amAthens Eleftherios V.
15h 40m
1 stop
STL1:55 pmLambert-St Louis
$487
Find similar

United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Dec 1
STL5:24 pmLambert-St Louis
32h 46m
1 stop
DUB8:10 amDublin
Dec 8
DUB9:00 amDublin
37h 28m
2 stops
STL4:28 pmLambert-St Louis
$455
Find similar
United Airlines
Dec 4
STL8:30 amLambert-St Louis
16h 50m
1 stop
BCN8:20 amBarcelona-El Prat
Dec 11
BCN1:35 pmBarcelona-El Prat
40h 10m
2 stops
STL10:45 pmLambert-St Louis
$461
Find similar
United Airlines
Dec 1
STL5:24 pmLambert-St Louis
31h 46m
2 stops
DUB7:10 amDublin
Dec 8
DUB9:00 amDublin
33h 15m
2 stops
STL12:15 pmLambert-St Louis
$462
Find similar

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 November 5, 2025.
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

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/2

9:00 am-7:45 am

1 stop16h 45m

Dublin

Tue 12/9

9:45 am-4:49 pm

1 stop13h 04m

$433

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 12/8

6:42 pm-11:00 pm

2 stops21h 18m

Rome Fiumicino

Wed 12/24

7:05 am-1:55 pm

1 stop13h 50m

$435

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/2

9:00 am-7:45 am

1 stop16h 45m

Dublin

Tue 12/9

10:45 am-8:47 pm

2 stops16h 02m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

6:00 am-8:00 am

2 stops19h 00m

Barcelona-El Prat

Tue 2/17

10:15 am-9:08 am

2 stops29h 53m

$449

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 12/1

5:24 pm-8:10 am

1 stop32h 46m

Dublin

Mon 12/8

9:00 am-4:28 pm

2 stops37h 28m

$455

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 12/4

8:30 am-8:20 am

1 stop16h 50m

Barcelona-El Prat

Thu 12/11

1:35 pm-10:45 pm

2 stops40h 10m

$461

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 2/21

7:41 am-7:10 am

2 stops17h 29m

Dublin

Sat 2/28

9:00 am-3:29 pm

1 stop12h 29m

$470

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/8

2:54 pm-10:15 am

2 stops13h 21m

Dublin

Tue 1/13

11:30 am-10:44 pm

1 stop17h 14m

$474

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

12:31 pm-9:35 am

2 stops14h 04m

Barcelona-El Prat

Thu 12/4

1:35 pm-3:29 pm

2 stops32h 54m

$480

St. LouisAmsterdam

STL - AMS

STLAMS

Lambert-St Louis

Sun 3/1

2:19 pm-1:20 pm

2 stops16h 01m

Amsterdam Schiphol

Tue 3/10

1:05 pm-10:18 pm

2 stops15h 13m

$508

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 October. Flight prices, which tend to average around $740, 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 October, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $743.

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 Monday. Travelers who choose to depart for Europe on a Monday will often find tickets for as low as $668. Flights from St. Louis to Europe on a Friday will generally be more expensive and average around $848. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Europe is in the evening. momondo users have found flights departing from St. Louis to Europe in the evening for as low as $781. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $958. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 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 $898 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 $737 on momondo.

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

There are 3 cabin classes available to choose from on Lambert-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 32% 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

$418

Fastest flight time

8h 05m

Direct flights

Mon, Wed, Thu and Sat

Airports in Europe

2 airports
The best one-way flight to Europe from St. Louis in the past 72 hours is $418. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $598.
The fastest flight from St. Louis to Europe takes 8h 05m
Direct flights go from St. Louis to Europe on Monday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights.
There are 2 airports near Europe: Frankfurt am Main (FRA), London Heathrow (LHR)
Search flight deals

  • 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
American AirlinesPriceFrom $488Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
LufthansaPriceFrom $524Free CancellationRating
6.8
7,555 reviews
Search Lufthansa flights
KLMPriceFrom $529Free CancellationRating
7.7
1,405 reviews
Search KLM flights
British AirwaysPriceFrom $546Free CancellationRating
6.7
7,496 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,004 reviews
Search Delta flights
Air CanadaPriceFrom $573Free CancellationRating
7.1
10,410 reviews
Search Air Canada flights
United AirlinesPriceFrom $578Free CancellationRating
7.4
9,004 reviews
Search United Airlines flights
Air FrancePriceFrom $582Free CancellationRating
7.4
1,484 reviews
Search Air France flights
IberiaPriceFrom $586Free CancellationRating
7.0
3,007 reviews
Search Iberia flights
Scandinavian AirlinesPriceFrom $602Free CancellationRating
7.4
1,560 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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