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Cheap flights from St. Louis to Europe from $360

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 8/1. 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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Find the cheapest flights from St. Louis to Europe

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
1:18 pm - 12:15 pm
STL
-
MXP
15h 57m
2 stops
Lufthansa Logo
6:30 am - 1:25 pm
MXP
-
STL
13h 55m
1 stop
$674Lufthansa
Wed, Aug 12 - Wed, Aug 26
United Airlines Logo
5:10 am - 7:45 am
STL
-
DUB
20h 35m
2 stops
United Airlines Logo
9:50 am - 12:49 pm
DUB
-
STL
32h 59m
2 stops
$674United Airlines
Tue, Aug 11 - Thu, Aug 20
Lufthansa Logo
1:18 pm - 12:15 pm
STL
-
MXP
15h 57m
2 stops
Lufthansa Logo
6:20 am - 1:25 pm
MXP
-
STL
14h 05m
1 stop
$675Lufthansa
Fri, Aug 14 - Fri, Aug 28
United Airlines Logo
1:18 pm - 9:45 am
STL
-
DUB
14h 27m
1 stop
United Airlines Logo
9:50 am - 12:49 pm
DUB
-
STL
32h 59m
2 stops
$679United Airlines
Tue, Aug 11 - Thu, Aug 20
Air Canada Logo
6:55 pm - 7:45 am
STL
-
DUB
30h 50m
2 stops
Air Canada Logo
9:20 am - 12:13 pm
DUB
-
STL
32h 53m
2 stops
$682Air Canada
Sun, Sep 6 - Tue, Sep 15
Air Canada Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Air Canada Logo
9:20 am - 3:38 pm
DUB
-
STL
36h 18m
2 stops
$683Air Canada
Mon, Aug 10 - Wed, Aug 19
British Airways Logo
9:35 pm - 5:50 pm
STL
-
MXP
13h 15m
1 stop
British Airways Logo
2:20 pm - 11:42 pm
MXP
-
STL
16h 22m
1 stop
$704British Airways
Tue, Aug 11 - Thu, Aug 27
British Airways Logo
6:06 am - 9:10 am
STL
-
FCO
20h 04m
1 stop
British Airways Logo
1:30 pm - 11:55 pm
FCO
-
STL
17h 25m
1 stop
$785British 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
12:00 pm - 11:55 pm
ATH
-
STL
19h 55m
1 stop
$838American Airlines
Tue, Aug 25 - Thu, Sep 3
American Airlines Logo
9:35 pm - 7:05 pm
STL
-
ATH
13h 30m
1 stop
American Airlines Logo
12:00 pm - 11:55 pm
ATH
-
STL
19h 55m
1 stop
$839American Airlines
Tue, Aug 25 - Thu, Sep 3

Finnair flights from St. Louis to Europe

Our best Finnair deals on St. Louis to Europe flight tickets
Finnair
Apr 27
STL12:27 pmLambert-St Louis
15h 18m
1 stop
DUB9:45 amDublin
May 13
DUB9:30 amDublin
18h 49m
1 stop
STL10:19 pmLambert-St Louis
$716
Finnair
Apr 12
STL12:27 pmLambert-St Louis
13h 18m
1 stop
FRA8:45 amFrankfurt am Main
Apr 26
FRA11:30 amFrankfurt am Main
17h 47m
2 stops
STL10:17 pmLambert-St Louis
$1,583

Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets
Lufthansa
Aug 12
STL1:18 pmLambert-St Louis
15h 57m
2 stops
MXP12:15 pmMilan Malpensa
Aug 26
MXP6:30 amMilan Malpensa
13h 55m
1 stop
STL1:25 pmLambert-St Louis
$674
Lufthansa
Aug 14
STL1:18 pmLambert-St Louis
15h 57m
2 stops
MXP12:15 pmMilan Malpensa
Aug 28
MXP6:20 amMilan Malpensa
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$675
Lufthansa
Aug 14
STL3:30 pmLambert-St Louis
19h 30m
1 stop
MXP6:00 pmMilan Malpensa
Aug 28
MXP6:20 amMilan Malpensa
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$681

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 April 1, 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. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Wed 8/12

1:18 pm-12:15 pm

2 stops15h 57m

Milan Malpensa

Wed 8/26

6:30 am-1:25 pm

1 stop13h 55m

$674

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

5:10 am-7:45 am

2 stops20h 35m

Dublin

Thu 8/20

9:50 am-12:49 pm

2 stops32h 59m

$674

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Fri 8/14

1:18 pm-12:15 pm

2 stops15h 57m

Milan Malpensa

Fri 8/28

6:20 am-1:25 pm

1 stop14h 05m

$675

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

1:18 pm-9:45 am

1 stop14h 27m

Dublin

Thu 8/20

9:50 am-12:49 pm

2 stops32h 59m

$679

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 9/6

6:55 pm-7:45 am

2 stops30h 50m

Dublin

Tue 9/15

9:20 am-12:13 pm

2 stops32h 53m

$682

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/10

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Wed 8/19

9:20 am-3:38 pm

2 stops36h 18m

$683
Quickest round-trip

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Tue 8/11

9:35 pm-5:50 pm

1 stop13h 15m

Milan Malpensa

Thu 8/27

2:20 pm-11:42 pm

1 stop16h 22m

$704

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Wed 8/5

6:06 am-9:10 am

1 stop20h 04m

Rome Fiumicino

Wed 8/19

1:30 pm-11:55 pm

1 stop17h 25m

$785

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

12:00 pm-11:55 pm

1 stop19h 55m

$838

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

12:00 pm-11:55 pm

1 stop19h 55m

$839

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 $693. 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 London Heathrow 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 $843 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

$474

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 $474. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $884.
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
American AirlinesPriceFrom $390Free CancellationRating
7.1
11,545 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
7,841 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,881 reviews
Search Lufthansa flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,366 reviews
Search Delta flights
KLMPriceFrom $507Free CancellationRating
7.8
1,481 reviews
Search KLM flights
IberiaPriceFrom $552Free CancellationRating
7.0
3,162 reviews
Search Iberia flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.3
1,735 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
10,877 reviews
Search Air Canada flights
Air FrancePriceFrom $616Free CancellationRating
7.4
1,559 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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