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Cheap flights from St. Louis to Europe from $235

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 10/4. 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
1:30 pm - 6:40 amSTL-MAD
10h 10m1 stop
Air Canada Logo
12:45 pm - 3:18 pmMAD-STL
33h 33m2 stops
$417Air Canada
Find Deal
Mon, Oct 6 - Wed, Oct 22
United Airlines Logo
1:30 pm - 6:40 amSTL-MAD
10h 10m1 stop
United Airlines Logo
12:45 pm - 2:27 pmMAD-STL
32h 42m2 stops
$418United Airlines
Find Deal
Sun, Oct 12 - Wed, Oct 22
British Airways Logo
12:58 pm - 12:40 pmSTL-MAD
16h 42m2 stops
British Airways Logo
11:35 am - 5:56 pmMAD-STL
13h 21m1 stop
$449British Airways
Find Deal
Wed, Feb 18 - Wed, Mar 4
American Airlines Logo
7:30 am - 5:45 amSTL-MAD
15h 15m1 stop
American Airlines Logo
1:00 pm - 9:44 pmMAD-STL
15h 44m2 stops
$450American Airlines
Find Deal
Wed, Feb 18 - Wed, Mar 4
British Airways Logo
4:44 pm - 2:15 pmSTL-MAD
14h 31m2 stops
British Airways Logo
1:00 pm - 7:03 pmMAD-STL
13h 03m1 stop
$452British Airways
Find Deal
Mon, Feb 16 - Tue, Mar 3
Delta Logo
6:00 am - 9:35 amSTL-MAD
20h 35m1 stop
Delta Logo
6:00 am - 5:29 pmMAD-STL
18h 29m2 stops
$471Delta
Find Deal
Mon, Oct 6 - Tue, Oct 21
Delta Logo
5:25 pm - 9:35 amSTL-MAD
33h 10m1 stop
Delta Logo
6:00 am - 5:29 pmMAD-STL
18h 29m2 stops
$476Delta
Find Deal
Sat, Oct 11 - Tue, Oct 21
Lufthansa Logo
4:50 pm - 11:00 amSTL-DUB
13h 10m1 stop
Lufthansa Logo
5:10 am - 1:55 pmDUB-STL
14h 45m1 stop
$491Lufthansa
Find Deal
Wed, Oct 29 - Wed, Nov 5
American Airlines Logo
6:21 pm - 1:35 pmSTL-DUB
13h 14m2 stops
American Airlines Logo
11:30 am - 8:18 pmDUB-STL
14h 48m1 stop
$500American Airlines
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Tue, Feb 10 - Tue, Feb 24
Lufthansa Logo
6:43 pm - 5:10 pmSTL-DUB
16h 27m2 stops
Lufthansa Logo
9:20 am - 11:42 pmDUB-STL
20h 22m2 stops
$531Lufthansa
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Wed, Nov 26 - Thu, Dec 4

United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Oct 12
STL1:30 pmLambert-St Louis
10h 10m
1 stop
MAD6:40 amMadrid Barajas
Oct 22
MAD12:45 pmMadrid Barajas
32h 42m
2 stops
STL2:27 pmLambert-St Louis
$418
Find similar
United Airlines
Feb 18
STL6:45 amLambert-St Louis
18h 15m
2 stops
MAD8:00 amMadrid Barajas
Mar 4
MAD1:35 pmMadrid Barajas
32h 46m
2 stops
STL3:21 pmLambert-St Louis
$422
Find similar
United Airlines
Oct 12
STL1:30 pmLambert-St Louis
10h 10m
1 stop
MAD6:40 amMadrid Barajas
Oct 22
MAD12:30 pmMadrid Barajas
32h 57m
2 stops
STL2:27 pmLambert-St Louis
$424
Find similar

British Airways flights from St. Louis to Europe

Our best British Airways deals on St. Louis to Europe flight tickets
British Airways
Feb 18
STL12:58 pmLambert-St Louis
16h 42m
2 stops
MAD12:40 pmMadrid Barajas
Mar 4
MAD11:35 amMadrid Barajas
13h 21m
1 stop
STL5:56 pmLambert-St Louis
$449
Find similar
British Airways
Feb 16
STL4:44 pmLambert-St Louis
14h 31m
2 stops
MAD2:15 pmMadrid Barajas
Mar 3
MAD1:00 pmMadrid Barajas
13h 03m
1 stop
STL7:03 pmLambert-St Louis
$452
Find similar
British Airways
Feb 17
STL11:54 amLambert-St Louis
14h 31m
1 stop
MAD9:25 amMadrid Barajas
Mar 3
MAD1:00 pmMadrid Barajas
16h 24m
1 stop
STL10:24 pmLambert-St Louis
$475
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 September 16, 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. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 10/6

1:30 pm-6:40 am

1 stop10h 10m

Madrid Barajas

Wed 10/22

12:45 pm-3:18 pm

2 stops33h 33m

$417

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 10/12

1:30 pm-6:40 am

1 stop10h 10m

Madrid Barajas

Wed 10/22

12:45 pm-2:27 pm

2 stops32h 42m

$418

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 2/18

12:58 pm-12:40 pm

2 stops16h 42m

Madrid Barajas

Wed 3/4

11:35 am-5:56 pm

1 stop13h 21m

$449

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 2/18

7:30 am-5:45 am

1 stop15h 15m

Madrid Barajas

Wed 3/4

1:00 pm-9:44 pm

2 stops15h 44m

$450

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 2/16

4:44 pm-2:15 pm

2 stops14h 31m

Madrid Barajas

Tue 3/3

1:00 pm-7:03 pm

1 stop13h 03m

$452

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 10/6

6:00 am-9:35 am

1 stop20h 35m

Madrid Barajas

Tue 10/21

6:00 am-5:29 pm

2 stops18h 29m

$471

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sat 10/11

5:25 pm-9:35 am

1 stop33h 10m

Madrid Barajas

Tue 10/21

6:00 am-5:29 pm

2 stops18h 29m

$476

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 10/29

4:50 pm-11:00 am

1 stop13h 10m

Dublin

Wed 11/5

5:10 am-1:55 pm

1 stop14h 45m

$491

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 2/10

6:21 pm-1:35 pm

2 stops13h 14m

Dublin

Tue 2/24

11:30 am-8:18 pm

1 stop14h 48m

$500

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/26

6:43 pm-5:10 pm

2 stops16h 27m

Dublin

Thu 12/4

9:20 am-11:42 pm

2 stops20h 22m

$531

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 $755.

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 $920 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 $751 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 44% 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

$525

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 $525. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $834.
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
1,385 reviews
Search KLM flights
British AirwaysPriceFrom $546Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
IberiaPriceFrom $566Free CancellationRating
7.0
2,924 reviews
Search Iberia flights
United AirlinesPriceFrom $573Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
DeltaPriceFrom $589Free CancellationRating
7.9
7,954 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $603Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $611Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
LufthansaPriceFrom $614Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
American AirlinesPriceFrom $614Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air CanadaPriceFrom $624Free 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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