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Cheap flights from St. Louis to Europe from $349

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 8/12. 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

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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.
Multiple Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
5:55 am - 1:25 pm
DUB
-
STL
13h 30m
1 stop
$672Multiple Airlines
Wed, Aug 19 - Wed, Sep 2
Multiple Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
5:55 am - 1:25 pm
DUB
-
STL
13h 30m
1 stop
$673Multiple Airlines
Mon, Aug 17 - Wed, Aug 26
United Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
United Airlines Logo
9:20 am - 5:49 pm
DUB
-
STL
38h 29m
2 stops
$682United Airlines
Wed, Aug 19 - Wed, Sep 2
United Airlines Logo
9:23 am - 9:45 am
STL
-
DUB
18h 22m
1 stop
United Airlines Logo
9:20 am - 5:49 pm
DUB
-
STL
38h 29m
2 stops
$683United Airlines
Wed, Jul 22 - Wed, Aug 19
British Airways Logo
6:06 am - 10:35 am
STL
-
BCN
21h 29m
1 stop
British Airways Logo
10:45 am - 6:14 pm
BCN
-
STL
14h 29m
1 stop
$768British Airways
Mon, Sep 21 - Tue, Sep 29
British Airways Logo
6:06 am - 10:35 am
STL
-
BCN
21h 29m
1 stop
British Airways Logo
5:10 pm - 7:30 pm
BCN
-
STL
33h 20m
1 stop
$774British Airways
Mon, Sep 28 - Mon, Oct 12
Lufthansa Logo
6:49 pm - 7:45 pm
STL
-
BCN
17h 56m
2 stops
Lufthansa Logo
6:40 pm - 1:25 pm
BCN
-
STL
25h 45m
2 stops
$800Lufthansa
Mon, Sep 28 - Mon, Oct 12
Lufthansa Logo
3:30 pm - 10:40 am
STL
-
LHR
13h 10m
1 stop
Lufthansa Logo
6:30 am - 1:25 pm
LHR
-
STL
12h 55m
1 stop
$835Lufthansa
Wed, Aug 19 - Fri, Aug 28
American Airlines Logo
9:35 pm - 7:05 pm
STL
-
ATH
13h 30m
1 stop
American Airlines Logo
12:00 pm - 11:55 pm
ATH
-
STL
19h 55m
1 stop
$838American Airlines
Tue, Aug 25 - Thu, Sep 3
American Airlines Logo
9:35 pm - 7:05 pm
STL
-
ATH
13h 30m
1 stop
American Airlines Logo
12:00 pm - 11:55 pm
ATH
-
STL
19h 55m
1 stop
$839American Airlines
Tue, Aug 25 - Thu, Sep 3

British Airways flights from St. Louis to Europe

Our best British Airways deals on St. Louis to Europe flight tickets
British Airways
Sep 21
STL6:06 amLambert-St Louis
21h 29m
1 stop
BCN10:35 amBarcelona-El Prat
Sep 29
BCN10:45 amBarcelona-El Prat
14h 29m
1 stop
STL6:14 pmLambert-St Louis
$768
British Airways
Sep 28
STL6:06 amLambert-St Louis
21h 29m
1 stop
BCN10:35 amBarcelona-El Prat
Oct 12
BCN5:10 pmBarcelona-El Prat
33h 20m
1 stop
STL7:30 pmLambert-St Louis
$774
British Airways
Sep 28
STL2:45 pmLambert-St Louis
18h 40m
2 stops
BCN4:25 pmBarcelona-El Prat
Oct 12
BCN9:20 pmBarcelona-El Prat
29h 10m
1 stop
STL7:30 pmLambert-St Louis
$793

Air Canada flights from St. Louis to Europe

Our best Air Canada deals on St. Louis to Europe flight tickets
Air Canada
Sep 21
STL5:32 pmLambert-St Louis
32h 48m
2 stops
BCN9:20 amBarcelona-El Prat
Sep 29
BCN12:15 pmBarcelona-El Prat
31h 05m
2 stops
STL12:20 pmLambert-St Louis
$805
Air Canada
Aug 26
STL12:10 pmLambert-St Louis
14h 25m
2 stops
LHR8:35 amLondon Heathrow
Sep 2
LHR5:15 pmLondon Heathrow
31h 27m
2 stops
STL6:42 pmLambert-St Louis
$831
Air Canada
Aug 26
STL6:00 amLambert-St Louis
22h 00m
2 stops
LHR10:00 amLondon Heathrow
Sep 2
LHR5:15 pmLondon Heathrow
31h 27m
2 stops
STL6:42 pmLambert-St Louis
$837

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 April 7, 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 8/19

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Wed 9/2

5:55 am-1:25 pm

1 stop13h 30m

$672

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/17

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Wed 8/26

5:55 am-1:25 pm

1 stop13h 30m

$673

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 8/19

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Wed 9/2

9:20 am-5:49 pm

2 stops38h 29m

$682

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 7/22

9:23 am-9:45 am

1 stop18h 22m

Dublin

Wed 8/19

9:20 am-5:49 pm

2 stops38h 29m

$683

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/21

6:06 am-10:35 am

1 stop21h 29m

Barcelona-El Prat

Tue 9/29

10:45 am-6:14 pm

1 stop14h 29m

$768

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

6:06 am-10:35 am

1 stop21h 29m

Barcelona-El Prat

Mon 10/12

5:10 pm-7:30 pm

1 stop33h 20m

$774

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

6:49 pm-7:45 pm

2 stops17h 56m

Barcelona-El Prat

Mon 10/12

6:40 pm-1:25 pm

2 stops25h 45m

$800
Quickest round-trip

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Wed 8/19

3:30 pm-10:40 am

1 stop13h 10m

London Heathrow

Fri 8/28

6:30 am-1:25 pm

1 stop12h 55m

$835

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 8/25

9:35 pm-7:05 pm

1 stop13h 30m

Athens Eleftherios V.

Thu 9/3

12:00 pm-11:55 pm

1 stop19h 55m

$838

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 8/25

9:35 pm-7:05 pm

1 stop13h 30m

Athens Eleftherios V.

Thu 9/3

12:00 pm-11:55 pm

1 stop19h 55m

$839

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 $672, 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 October is also cheap. Prices for this month can be found on momondo for an average of $675.

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 $693. Flights from St. Louis to Europe on a Saturday will generally be more expensive and average around $1,101. 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 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 $845 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 $680 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 84% 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

$492

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 $492. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $896.
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
American AirlinesPriceFrom $390Free CancellationRating
7.1
11,546 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
7,857 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,894 reviews
Search Lufthansa flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,387 reviews
Search Delta flights
KLMPriceFrom $507Free CancellationRating
7.7
1,491 reviews
Search KLM flights
IberiaPriceFrom $552Free CancellationRating
7.0
3,165 reviews
Search Iberia flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,548 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.3
1,744 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
10,897 reviews
Search Air Canada flights
Air FrancePriceFrom $616Free CancellationRating
7.4
1,563 reviews
Search Air France 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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