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Cheap flights from St. Louis to Europe from $225

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 10/16. 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
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:20 pm
DUB
-
STL
13h 00m
1 stop
$350Aer Lingus
Tue, Sep 8 - Tue, Sep 15
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:24 pm
DUB
-
STL
13h 04m
1 stop
$355Aer Lingus
Tue, Aug 18 - Thu, Aug 27
United Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
United Airlines Logo
12:45 pm - 12:13 pm
MAD
-
STL
30h 28m
2 stops
$709United Airlines
Sun, Oct 4 - Wed, Oct 14
United Airlines Logo
7:30 am - 9:00 am
STL
-
MAD
18h 30m
1 stop
United Airlines Logo
12:45 pm - 2:17 pm
MAD
-
STL
32h 32m
2 stops
$710United Airlines
Wed, Oct 7 - Wed, Oct 21
Lufthansa Logo
3:40 pm - 1:40 pm
STL
-
ATH
14h 00m
1 stop
Lufthansa Logo
6:40 am - 1:45 pm
ATH
-
STL
15h 05m
1 stop
$776Lufthansa
Wed, Dec 30 - Wed, Jan 20
Lufthansa Logo
7:04 pm - 1:25 am
STL
-
ATH
23h 21m
2 stops
Lufthansa Logo
6:35 am - 9:13 pm
ATH
-
STL
22h 38m
2 stops
$780Lufthansa
Sun, Oct 25 - Tue, Nov 3
American Airlines Logo
8:43 am - 8:40 am
STL
-
LGW
17h 57m
2 stops
American Airlines Logo
2:30 pm - 8:37 am
LGW
-
STL
24h 07m
2 stops
$982American Airlines
Thu, Oct 1 - Tue, Oct 6
American Airlines Logo
8:43 am - 6:50 am
STL
-
LGW
16h 07m
2 stops
American Airlines Logo
10:30 am - 11:58 pm
LGW
-
STL
19h 28m
2 stops
$983American Airlines
Thu, Oct 1 - Tue, Oct 6
Delta Logo
12:30 pm - 9:25 am
STL
-
LGW
14h 55m
2 stops
Delta Logo
10:00 am - 11:48 pm
LGW
-
STL
18h 48m
2 stops
$997Delta
Tue, Oct 6 - Sat, Oct 31
Delta Logo
12:52 pm - 9:40 am
STL
-
LGW
14h 48m
2 stops
Delta Logo
10:25 am - 11:26 pm
LGW
-
STL
19h 01m
2 stops
$998Delta
Mon, Aug 17 - Sun, Aug 23

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United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Oct 4
STL12:10 pmLambert-St Louis
11h 40m
1 stop
MAD6:50 amMadrid Barajas
Oct 14
MAD12:45 pmMadrid Barajas
30h 28m
2 stops
STL12:13 pmLambert-St Louis
$709
United Airlines
Oct 7
STL7:30 amLambert-St Louis
18h 30m
1 stop
MAD9:00 amMadrid Barajas
Oct 21
MAD12:45 pmMadrid Barajas
32h 32m
2 stops
STL2:17 pmLambert-St Louis
$710
United Airlines
Oct 4
STL12:10 pmLambert-St Louis
11h 40m
1 stop
MAD6:50 amMadrid Barajas
Oct 14
MAD12:45 pmMadrid Barajas
30h 28m
2 stops
STL12:13 pmLambert-St Louis
$714

Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets
Lufthansa
Oct 7
STL1:29 pmLambert-St Louis
21h 11m
2 stops
MAD5:40 pmMadrid Barajas
Oct 21
MAD8:25 amMadrid Barajas
21h 34m
2 stops
STL10:59 pmLambert-St Louis
$729
Lufthansa
Oct 7
STL1:29 pmLambert-St Louis
21h 11m
2 stops
MAD5:40 pmMadrid Barajas
Oct 21
MAD8:25 amMadrid Barajas
21h 34m
2 stops
STL10:59 pmLambert-St Louis
$733
Lufthansa
Oct 12
STL1:29 pmLambert-St Louis
15h 51m
2 stops
MAD12:20 pmMadrid Barajas
Oct 20
MAD5:55 amMadrid Barajas
22h 26m
2 stops
STL9:21 pmLambert-St Louis
$734

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 July 22, 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
Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 9/8

8:55 am-5:10 am

1 stop14h 15m

Dublin

Tue 9/15

1:20 pm-8:20 pm

1 stop13h 00m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/18

8:55 am-5:10 am

1 stop14h 15m

Dublin

Thu 8/27

1:20 pm-8:24 pm

1 stop13h 04m

$355

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 10/4

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Wed 10/14

12:45 pm-12:13 pm

2 stops30h 28m

$709

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/7

7:30 am-9:00 am

1 stop18h 30m

Madrid Barajas

Wed 10/21

12:45 pm-2:17 pm

2 stops32h 32m

$710

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Wed 12/30

3:40 pm-1:40 pm

1 stop14h 00m

Athens Eleftherios V.

Wed 1/20

6:40 am-1:45 pm

1 stop15h 05m

$776

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Sun 10/25

7:04 pm-1:25 am

2 stops23h 21m

Athens Eleftherios V.

Tue 11/3

6:35 am-9:13 pm

2 stops22h 38m

$780

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 10/1

8:43 am-8:40 am

2 stops17h 57m

London Gatwick

Tue 10/6

2:30 pm-8:37 am

2 stops24h 07m

$982

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Thu 10/1

8:43 am-6:50 am

2 stops16h 07m

London Gatwick

Tue 10/6

10:30 am-11:58 pm

2 stops19h 28m

$983

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Tue 10/6

12:30 pm-9:25 am

2 stops14h 55m

London Gatwick

Sat 10/31

10:00 am-11:48 pm

2 stops18h 48m

$997

St. LouisLondon

STL - LGW

STLLGW

Lambert-St Louis

Mon 8/17

12:52 pm-9:40 am

2 stops14h 48m

London Gatwick

Sun 8/23

10:25 am-11:26 pm

2 stops19h 01m

$998

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 February. Flight prices, which tend to average around $691, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $706.

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 $1,197. 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 Frankfurt am Main 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 $923 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 $835 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 40% 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

$491

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 $491. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $975.
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
Virgin AtlanticPriceFrom $304Free CancellationRating
7.5
693 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $410Free CancellationRating
6.7
8,127 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
8,159 reviews
Search Lufthansa flights
DeltaPriceFrom $483Free CancellationRating
7.8
8,479 reviews
Search Delta flights
American AirlinesPriceFrom $502Free CancellationRating
7.1
11,831 reviews
Search American Airlines flights
KLMPriceFrom $507Free CancellationRating
7.8
1,544 reviews
Search KLM flights
IberiaPriceFrom $523Free CancellationRating
7.0
3,257 reviews
Search Iberia flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
10,024 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.4
1,895 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
11,371 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.

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