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Cheap flights from St. Louis to Europe from $272

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 3/28. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:35 pm - 7:30 pm
STL
-
DUB
15h 55m
1 stop
Multiple Airlines Logo
9:40 am - 11:20 pm
DUB
-
STL
19h 40m
2 stops
$544Multiple Airlines
Wed, Aug 12 - Wed, Sep 9
Finnair Logo
5:11 pm - 11:50 am
STL
-
DUB
12h 39m
1 stop
Finnair Logo
9:40 am - 11:51 pm
DUB
-
STL
20h 11m
2 stops
$557Finnair
Tue, Jul 28 - Thu, Aug 27
Finnair Logo
4:18 pm - 11:50 am
STL
-
DUB
13h 32m
1 stop
Finnair Logo
9:40 am - 11:51 pm
DUB
-
STL
20h 11m
2 stops
$558Finnair
Sun, Aug 23 - Wed, Aug 26
American Airlines Logo
6:29 am - 7:05 am
STL
-
FCO
17h 36m
1 stop
American Airlines Logo
12:15 pm - 7:29 pm
FCO
-
STL
14h 14m
1 stop
$724American Airlines
Wed, Apr 15 - Thu, Apr 23
American Airlines Logo
6:29 am - 7:05 am
STL
-
FCO
17h 36m
1 stop
American Airlines Logo
11:05 am - 10:07 pm
FCO
-
STL
18h 02m
2 stops
$729American Airlines
Wed, Apr 15 - Thu, Apr 23
Air Canada Logo
2:20 pm - 10:00 am
STL
-
LHR
13h 40m
2 stops
Air Canada Logo
6:50 am - 8:25 pm
LHR
-
STL
19h 35m
2 stops
$731Air Canada
Sun, May 3 - Tue, May 12
Air Canada Logo
4:05 pm - 11:50 am
STL
-
LHR
13h 45m
1 stop
Air Canada Logo
5:15 pm - 8:25 pm
LHR
-
STL
33h 10m
2 stops
$739Air Canada
Tue, Apr 28 - Tue, May 5
Lufthansa Logo
7:09 pm - 6:25 pm
STL
-
LHR
17h 16m
2 stops
Lufthansa Logo
9:00 am - 9:13 pm
LHR
-
STL
18h 13m
2 stops
$741Lufthansa
Tue, May 5 - Tue, May 19
Lufthansa Logo
3:30 pm - 5:55 pm
STL
-
LCY
20h 25m
1 stop
Lufthansa Logo
9:15 am - 11:00 pm
LCY
-
STL
19h 45m
2 stops
$778Lufthansa
Wed, Aug 19 - Fri, Aug 28
United Airlines Logo
7:11 pm - 9:55 am
STL
-
FRA
31h 44m
1 stop
United Airlines Logo
5:05 pm - 8:04 pm
FRA
-
STL
33h 59m
1 stop
$1,024United Airlines
Sat, May 2 - Sun, May 10

Aer Lingus flights from St. Louis to Europe

Our best Aer Lingus deals on St. Louis to Europe flight tickets
Aer Lingus
Mar 17
STL2:37 pmLambert-St Louis
13h 23m
1 stop
DUB9:00 amDublin
Mar 19
DUB11:30 amDublin
16h 20m
1 stop
STL10:50 pmLambert-St Louis
$966
Aer Lingus
Apr 19
STL6:29 amLambert-St Louis
44h 46m
2 stops
FRA10:15 amFrankfurt am Main
Apr 24
FRA10:55 amFrankfurt am Main
18h 22m
2 stops
STL10:17 pmLambert-St Louis
$1,009

British Airways flights from St. Louis to Europe

Our best British Airways deals on St. Louis to Europe flight tickets
British Airways
Apr 27
STL1:29 pmLambert-St Louis
23h 51m
2 stops
CDG8:20 pmParis Charles de Gaulle
May 4
CDG9:35 pmParis Charles de Gaulle
32h 24m
2 stops
STL10:59 pmLambert-St Louis
$768
British Airways
Apr 27
STL1:29 pmLambert-St Louis
14h 31m
2 stops
CDG11:00 amParis Charles de Gaulle
May 13
CDG12:05 pmParis Charles de Gaulle
14h 25m
1 stop
STL7:30 pmLambert-St Louis
$776
British Airways
Apr 20
STL2:12 pmLambert-St Louis
12h 38m
1 stop
FCO9:50 amRome Fiumicino
May 6
FCO10:00 amRome Fiumicino
13h 41m
1 stop
STL4:41 pmLambert-St Louis
$789

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 March 15, 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 8/12

9:35 pm-7:30 pm

1 stop15h 55m

Dublin

Wed 9/9

9:40 am-11:20 pm

2 stops19h 40m

$544

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 7/28

5:11 pm-11:50 am

1 stop12h 39m

Dublin

Thu 8/27

9:40 am-11:51 pm

2 stops20h 11m

$557

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/23

4:18 pm-11:50 am

1 stop13h 32m

Dublin

Wed 8/26

9:40 am-11:51 pm

2 stops20h 11m

$558
Quickest round-trip

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/15

6:29 am-7:05 am

1 stop17h 36m

Rome Fiumicino

Thu 4/23

12:15 pm-7:29 pm

1 stop14h 14m

$724

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 4/15

6:29 am-7:05 am

1 stop17h 36m

Rome Fiumicino

Thu 4/23

11:05 am-10:07 pm

2 stops18h 02m

$729

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Sun 5/3

2:20 pm-10:00 am

2 stops13h 40m

London Heathrow

Tue 5/12

6:50 am-8:25 pm

2 stops19h 35m

$731

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 4/28

4:05 pm-11:50 am

1 stop13h 45m

London Heathrow

Tue 5/5

5:15 pm-8:25 pm

2 stops33h 10m

$739

St. LouisLondon

STL - LHR

STLLHR

Lambert-St Louis

Tue 5/5

7:09 pm-6:25 pm

2 stops17h 16m

London Heathrow

Tue 5/19

9:00 am-9:13 pm

2 stops18h 13m

$741

St. LouisLondon

STL - LCY

STLLCY

Lambert-St Louis

Wed 8/19

3:30 pm-5:55 pm

1 stop20h 25m

London City

Fri 8/28

9:15 am-11:00 pm

2 stops19h 45m

$778

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Sat 5/2

7:11 pm-9:55 am

1 stop31h 44m

Frankfurt am Main

Sun 5/10

5:05 pm-8:04 pm

1 stop33h 59m

$1,024

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 $690.

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 $688. Flights from St. Louis to Europe on a Saturday will generally be more expensive and average around $1,050. 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 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 $839 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 $756 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

$478

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 $478. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $861.
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

  • 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
11,469 reviews
Search American Airlines flights
British AirwaysPriceFrom $458Free CancellationRating
6.7
7,794 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,850 reviews
Search Lufthansa flights
KLMPriceFrom $507Free CancellationRating
7.8
1,471 reviews
Search KLM flights
DeltaPriceFrom $507Free CancellationRating
7.9
8,293 reviews
Search Delta flights
IberiaPriceFrom $552Free CancellationRating
7.0
3,136 reviews
Search Iberia flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,426 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.3
1,715 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
10,804 reviews
Search Air Canada flights
Air FrancePriceFrom $616Free CancellationRating
7.4
1,546 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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