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Cheap flights from St. Louis to Europe from $250

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 10/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Europe

Cheap round-trip flights

Air Canada Logo
8:00 am - 6:10 amSTL-DUB
17h 10m2 stops
Air Canada Logo
9:00 am - 3:46 pmDUB-STL
36h 46m2 stops
$511Air Canada
Find Deal
Tue, Oct 28 - Wed, Nov 12
United Airlines Logo
5:58 pm - 9:55 amSTL-DUB
10h 57m1 stop
United Airlines Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$517United Airlines
Find Deal
Tue, Oct 28 - Wed, Nov 12
Delta Logo
1:26 pm - 8:55 amSTL-LHR
13h 29m2 stops
Delta Logo
6:15 am - 4:48 pmLHR-STL
16h 33m2 stops
$527Delta
Find Deal
Tue, Sep 9 - Wed, Oct 1
Delta Logo
1:26 pm - 8:55 amSTL-LHR
13h 29m2 stops
Delta Logo
11:45 am - 11:09 pmLHR-STL
17h 24m2 stops
$528Delta
Find Deal
Tue, Sep 9 - Wed, Sep 17
British Airways Logo
5:09 pm - 10:50 amSTL-LHR
11h 41m1 stop
British Airways Logo
1:30 pm - 8:14 pmLHR-STL
12h 44m1 stop
$529British Airways
Find Deal
Tue, Oct 14 - Wed, Oct 22
British Airways Logo
12:53 pm - 9:40 amSTL-DUB
14h 47m2 stops
British Airways Logo
8:40 pm - 5:56 pmDUB-STL
27h 16m2 stops
$531British Airways
Find Deal
Wed, Feb 11 - Tue, Feb 17
American Airlines Logo
2:54 pm - 9:15 amSTL-LHR
12h 21m1 stop
American Airlines Logo
2:45 pm - 11:32 pmLHR-STL
14h 47m1 stop
$584American Airlines
Find Deal
Fri, Dec 12 - Fri, Jan 16
American Airlines Logo
3:23 pm - 2:30 pmSTL-FCO
16h 07m2 stops
American Airlines Logo
1:10 pm - 11:04 pmFCO-STL
16h 54m1 stop
$609American Airlines
Find Deal
Sun, Nov 9 - Fri, Nov 21
Lufthansa Logo
12:25 pm - 11:00 amSTL-MAD
15h 35m2 stops
Lufthansa Logo
6:00 am - 3:44 pmMAD-STL
16h 44m2 stops
$665Lufthansa
Find Deal
Sun, Oct 12 - Sat, Oct 25
Lufthansa Logo
3:50 pm - 4:25 pmSTL-DUB
18h 35m1 stop
Lufthansa Logo
9:30 am - 11:59 pmDUB-STL
20h 29m1 stop
$668Lufthansa
Find Deal
Fri, Jan 2 - Sat, Jan 17

United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Oct 28
STL5:58 pmLambert-St Louis
10h 57m
1 stop
DUB9:55 amDublin
Nov 12
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$517
Find similar
United Airlines
Oct 19
STL5:34 pmLambert-St Louis
32h 31m
1 stop
VCE9:05 amVenice Marco Polo
Nov 4
VCE11:05 amVenice Marco Polo
36h 30m
1 stop
STL4:35 pmLambert-St Louis
$553
Find similar
United Airlines
Jan 31
STL6:40 pmLambert-St Louis
31h 30m
1 stop
DUB8:10 amDublin
Feb 12
DUB10:40 amDublin
12h 34m
1 stop
STL5:14 pmLambert-St Louis
$557
Find similar

Air Canada flights from St. Louis to Europe

Our best Air Canada deals on St. Louis to Europe flight tickets
Air Canada
Oct 28
STL8:00 amLambert-St Louis
17h 10m
2 stops
DUB6:10 amDublin
Nov 12
DUB9:00 amDublin
36h 46m
2 stops
STL3:46 pmLambert-St Louis
$511
Find similar
Air Canada
Oct 28
STL10:00 amLambert-St Louis
15h 10m
2 stops
DUB6:10 amDublin
Nov 12
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$519
Find similar
Air Canada
Oct 6
STL1:30 pmLambert-St Louis
10h 10m
1 stop
MAD6:40 amMadrid Barajas
Oct 21
MAD12:45 pmMadrid Barajas
32h 42m
2 stops
STL2:27 pmLambert-St Louis
$560
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 August 26, 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 10/28

8:00 am-6:10 am

2 stops17h 10m

Dublin

Wed 11/12

9:00 am-3:46 pm

2 stops36h 46m

$511

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 10/28

5:58 pm-9:55 am

1 stop10h 57m

Dublin

Wed 11/12

9:00 am-3:29 pm

1 stop12h 29m

$517

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/9

1:26 pm-8:55 am

2 stops13h 29m

London Heathrow

Wed 10/1

6:15 am-4:48 pm

2 stops16h 33m

$527

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/9

1:26 pm-8:55 am

2 stops13h 29m

London Heathrow

Wed 9/17

11:45 am-11:09 pm

2 stops17h 24m

$528

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 10/14

5:09 pm-10:50 am

1 stop11h 41m

London Heathrow

Wed 10/22

1:30 pm-8:14 pm

1 stop12h 44m

$529

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/11

12:53 pm-9:40 am

2 stops14h 47m

Dublin

Tue 2/17

8:40 pm-5:56 pm

2 stops27h 16m

$531

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Fri 12/12

2:54 pm-9:15 am

1 stop12h 21m

London Heathrow

Fri 1/16

2:45 pm-11:32 pm

1 stop14h 47m

$584

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sun 11/9

3:23 pm-2:30 pm

2 stops16h 07m

Rome Fiumicino

Fri 11/21

1:10 pm-11:04 pm

1 stop16h 54m

$609

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 10/12

12:25 pm-11:00 am

2 stops15h 35m

Madrid Barajas

Sat 10/25

6:00 am-3:44 pm

2 stops16h 44m

$665

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 1/2

3:50 pm-4:25 pm

1 stop18h 35m

Dublin

Sat 1/17

9:30 am-11:59 pm

1 stop20h 29m

$668

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 $751, 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 $758.

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 Wednesday. Travelers who choose to depart for Europe on a Wednesday will often find tickets for as low as $846. Flights from St. Louis to Europe on a Tuesday will generally be more expensive and average around $1,006. 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 morning. momondo users have found flights departing from St. Louis to Europe in the morning for as low as $915. 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 Frankfurt am Main 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 $927 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 $813 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 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

$554

Fastest flight time

8h 40m

Direct flights

Mon, Thu and Sat

Airports in Europe

1 airport
The best one-way flight to Europe from St. Louis in the past 72 hours is $554. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $825.
The fastest flight from St. Louis to Europe takes 8h 40m
Direct flights go from St. Louis to Europe on Monday, Thursday and Saturday. There are no airlines offering direct flights.
There is 1 airport near Europe: Frankfurt am Main (FRA)
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
KLMPriceFrom $530Free CancellationRating
7.8
1,387 reviews
Search KLM flights
British AirwaysPriceFrom $546Free CancellationRating
6.7
7,309 reviews
Search British Airways flights
IberiaPriceFrom $568Free CancellationRating
7.0
2,891 reviews
Search Iberia flights
United AirlinesPriceFrom $573Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights
DeltaPriceFrom $593Free CancellationRating
7.9
7,979 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $603Free CancellationRating
7.4
1,477 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $611Free CancellationRating
7.6
836 reviews
Search Austrian Airlines flights
LufthansaPriceFrom $614Free CancellationRating
6.8
7,359 reviews
Search Lufthansa flights
American AirlinesPriceFrom $614Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $629Free CancellationRating
7.1
10,000 reviews
Search Air Canada 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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Find better results for your trip to Europe

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