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Cheap flights from St. Louis to Europe from $325

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 7/27. 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
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
6:00 am - 1:25 pm
DUB
-
STL
13h 25m
1 stop
$662Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Multiple Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
6:00 am - 1:25 pm
DUB
-
STL
13h 25m
1 stop
$664Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
United Airlines Logo
5:10 am - 7:45 am
STL
-
DUB
20h 35m
2 stops
United Airlines Logo
9:20 am - 12:49 pm
DUB
-
STL
33h 29m
2 stops
$679United Airlines
Tue, Sep 1 - Fri, Sep 11
United Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
United Airlines Logo
9:50 am - 12:13 pm
DUB
-
STL
32h 23m
2 stops
$683United Airlines
Wed, Sep 9 - Tue, Sep 15
British Airways Logo
10:22 am - 10:20 am
STL
-
FCO
16h 58m
1 stop
British Airways Logo
1:30 pm - 10:40 pm
FCO
-
STL
16h 10m
1 stop
$786British Airways
Wed, Aug 5 - Wed, Aug 19
British Airways Logo
3:25 pm - 10:20 am
STL
-
FCO
11h 55m
1 stop
British Airways Logo
1:30 pm - 10:40 pm
FCO
-
STL
16h 10m
1 stop
$791British Airways
Wed, Aug 5 - Wed, Aug 19
American Airlines Logo
9:35 pm - 7:05 pm
STL
-
ATH
13h 30m
1 stop
American Airlines Logo
1:00 pm - 11:59 pm
ATH
-
STL
18h 59m
2 stops
$844American Airlines
Tue, Aug 25 - Thu, Sep 3
Lufthansa Logo
12:30 pm - 2:55 pm
STL
-
ATH
18h 25m
2 stops
Lufthansa Logo
6:35 am - 9:22 pm
ATH
-
STL
22h 47m
2 stops
$888Lufthansa
Tue, Aug 25 - Thu, Sep 3
Lufthansa Logo
12:30 pm - 2:55 pm
STL
-
ATH
18h 25m
2 stops
Lufthansa Logo
6:00 am - 3:38 pm
ATH
-
STL
17h 38m
2 stops
$889Lufthansa
Tue, Aug 25 - Thu, Sep 3
American Airlines Logo
6:20 am - 8:15 am
STL
-
CDG
19h 55m
1 stop
American Airlines Logo
7:05 am - 5:37 pm
CDG
-
STL
17h 32m
2 stops
$971American Airlines
Wed, Oct 28 - Sat, Nov 7

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Aer Lingus flights from St. Louis to Europe

Our best Aer Lingus deals on St. Louis to Europe flight tickets
Aer Lingus
May 5
STL5:21 pmLambert-St Louis
19h 34m
2 stops
LHR6:55 pmLondon Heathrow
May 19
LHR12:00 pmLondon Heathrow
17h 56m
2 stops
STL11:56 pmLambert-St Louis
$1,049
Aer Lingus
May 7
STL5:21 pmLambert-St Louis
14h 09m
2 stops
LHR1:30 pmLondon Heathrow
May 14
LHR1:25 pmLondon Heathrow
16h 31m
2 stops
STL11:56 pmLambert-St Louis
$1,060
Aer Lingus
May 11
STL12:27 pmLambert-St Louis
24h 28m
2 stops
FCO7:55 pmRome Fiumicino
May 20
FCO11:10 amRome Fiumicino
18h 09m
2 stops
STL10:19 pmLambert-St Louis
$1,065

United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Sep 1
STL5:10 amLambert-St Louis
20h 35m
2 stops
DUB7:45 amDublin
Sep 11
DUB9:20 amDublin
33h 29m
2 stops
STL12:49 pmLambert-St Louis
$679
United Airlines
Sep 9
STL12:10 pmLambert-St Louis
13h 35m
1 stop
DUB7:45 amDublin
Sep 15
DUB9:50 amDublin
32h 23m
2 stops
STL12:13 pmLambert-St Louis
$683
United Airlines
Sep 1
STL12:30 pmLambert-St Louis
16h 40m
1 stop
DUB11:10 amDublin
Sep 11
DUB9:20 amDublin
38h 29m
2 stops
STL5:49 pmLambert-St Louis
$684

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 May 2, 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

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$662

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$664

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 9/1

5:10 am-7:45 am

2 stops20h 35m

Dublin

Fri 9/11

9:20 am-12:49 pm

2 stops33h 29m

$679

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

9:50 am-12:13 pm

2 stops32h 23m

$683

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

10:22 am-10:20 am

1 stop16h 58m

Rome Fiumicino

Wed 8/19

1:30 pm-10:40 pm

1 stop16h 10m

$786

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

3:25 pm-10:20 am

1 stop11h 55m

Rome Fiumicino

Wed 8/19

1:30 pm-10:40 pm

1 stop16h 10m

$791

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

1:00 pm-11:59 pm

2 stops18h 59m

$844

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 8/25

12:30 pm-2:55 pm

2 stops18h 25m

Athens Eleftherios V.

Thu 9/3

6:35 am-9:22 pm

2 stops22h 47m

$888

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 8/25

12:30 pm-2:55 pm

2 stops18h 25m

Athens Eleftherios V.

Thu 9/3

6:00 am-3:38 pm

2 stops17h 38m

$889

St. LouisParis

STL - CDG

STLCDG

Lambert-St Louis

Wed 10/28

6:20 am-8:15 am

1 stop19h 55m

Paris Charles de Gaulle

Sat 11/7

7:05 am-5:37 pm

2 stops17h 32m

$971

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 $288, 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 March is also cheap. Prices for this month can be found on momondo for an average of $725.

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 $750. 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 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 $851 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 $720 on momondo.

Can stopping save me money on St. Louis to Europe flights?

You could potentially save up to 43% 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

$494

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 $494. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $1,067.
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
DeltaPriceFrom $355Free CancellationRating
7.9
8,463 reviews
Search Delta flights
American AirlinesPriceFrom $390Free CancellationRating
7.1
11,677 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
7,940 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,965 reviews
Search Lufthansa flights
KLMPriceFrom $507Free CancellationRating
7.8
1,509 reviews
Search KLM flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,684 reviews
Search United Airlines flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
10,992 reviews
Search Air Canada flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.4
1,767 reviews
Search Scandinavian Airlines flights
IberiaPriceFrom $568Free CancellationRating
7.0
3,209 reviews
Search Iberia flights
Air FrancePriceFrom $616Free CancellationRating
7.4
1,583 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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Find better results for your trip to Europe

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