What is the cheapest airline that flies from Lambert-St Louis to Europe?

KLM, Air Canada, and Lufthansa are the most popular carriers operating from Lambert-St Louis to Europe

What airlines fly to Europe?

United Airlines, American Airlines and British Airways are the top three most popular airlines that fly to Europe from St. Louis according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Europe. Keep in mind that there are 10 different airlines that fly to Europe on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Europe on average per week?

As of March 2026, there are 6 flights per week flying from St. Louis to Europe. The most common day of the week flights depart is Wed, with 33% of flights taking off on this day.

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?

As of March 2026, there are 12 operators available to choose from 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.

$275 Cheap Flights from St. Louis to Europe in 2026

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Find the cheapest flights from St. Louis to Europe

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:55 pm - 4:40 pm

STL

MXP

14h 45m

2 stops

6:00 am - 1:25 pm

MXP

STL

14h 25m

1 stop

$583Lufthansa

Tue, Aug 11 - Wed, Aug 26

3:30 pm - 10:35 am

STL

MXP

12h 05m

1 stop

6:00 am - 1:25 pm

MXP

STL

14h 25m

1 stop

$590Lufthansa

Tue, Aug 11 - Wed, Aug 26

12:10 pm - 10:20 am

STL

MXP

15h 10m

1 stop

12:20 pm - 12:49 pm

MXP

STL

31h 29m

2 stops

$591United Airlines

Fri, Aug 14 - Fri, Aug 28

11:25 am - 4:40 pm

STL

MXP

22h 15m

2 stops

12:20 pm - 12:49 pm

MXP

STL

31h 29m

2 stops

$599United Airlines

Fri, Aug 14 - Fri, Aug 28

9:16 am - 10:20 am

STL

MXP

18h 04m

3 stops

12:20 pm - 12:49 pm

MXP

STL

31h 29m

2 stops

$600Air Canada

Tue, Aug 11 - Wed, Aug 26

5:33 pm - 10:20 am

STL

MXP

33h 47m

2 stops

12:20 pm - 12:13 pm

MXP

STL

30h 53m

2 stops

$609Air Canada

Fri, Aug 7 - Sat, Aug 22

9:35 pm - 7:45 am

STL

DUB

28h 10m

1 stop

10:30 am - 7:30 pm

DUB

STL

15h 00m

1 stop

$652British Airways

Wed, Apr 22 - Wed, Apr 29

1:01 pm - 10:20 am

STL

FCO

14h 19m

1 stop

10:00 am - 7:14 pm

FCO

STL

16h 14m

1 stop

$685British Airways

Mon, Aug 17 - Wed, Aug 26

6:06 am - 11:00 am

STL

ATH

20h 54m

1 stop

6:55 am - 6:02 pm

ATH

STL

19h 07m

2 stops

$822American Airlines

Tue, Sep 1 - Thu, Sep 10

7:23 am - 11:00 am

STL

ATH

19h 37m

1 stop

7:25 am - 6:58 pm

ATH

STL

19h 33m

2 stops

$832American Airlines

Tue, Sep 1 - Thu, Sep 10

Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets

Lufthansa

Aug 11

STL6:55 pmLambert-St Louis

14h 45m

2 stops

MXP4:40 pmMilan Malpensa

Aug 26

MXP6:00 amMilan Malpensa

14h 25m

1 stop

STL1:25 pmLambert-St Louis

$583

Lufthansa

Aug 11

STL3:30 pmLambert-St Louis

12h 05m

1 stop

MXP10:35 amMilan Malpensa

Aug 26

MXP6:00 amMilan Malpensa

14h 25m

1 stop

STL1:25 pmLambert-St Louis

$590

Lufthansa

Aug 11

STL6:55 pmLambert-St Louis

14h 45m

2 stops

MXP4:40 pmMilan Malpensa

Aug 26

MXP6:20 amMilan Malpensa

16h 18m

2 stops

STL3:38 pmLambert-St Louis

$594

Aer Lingus flights from St. Louis to Europe

Our best Aer Lingus deals on St. Louis to Europe flight tickets

Aer Lingus

Apr 21

STL12:25 pmLambert-St Louis

14h 50m

2 stops

FRA10:15 amFrankfurt am Main

Apr 28

FRA10:55 amFrankfurt am Main

19h 51m

2 stops

STL11:46 pmLambert-St Louis

$1,044

Aer Lingus

Mar 31

STL9:59 amLambert-St Louis

17h 16m

2 stops

FRA10:15 amFrankfurt am Main

Apr 8

FRA10:55 amFrankfurt am Main

19h 51m

2 stops

STL11:46 pmLambert-St Louis

$1,066

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Tue 8/11

6:55 pm-4:40 pm

2 stops14h 45m

Milan Malpensa

Wed 8/26

6:00 am-1:25 pm

1 stop14h 25m

$583

Quickest round-trip

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Tue 8/11

3:30 pm-10:35 am

1 stop12h 05m

Milan Malpensa

Wed 8/26

6:00 am-1:25 pm

1 stop14h 25m

$590

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Fri 8/14

12:10 pm-10:20 am

1 stop15h 10m

Milan Malpensa

Fri 8/28

12:20 pm-12:49 pm

2 stops31h 29m

$591

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Fri 8/14

11:25 am-4:40 pm

2 stops22h 15m

Milan Malpensa

Fri 8/28

12:20 pm-12:49 pm

2 stops31h 29m

$599

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Tue 8/11

9:16 am-10:20 am

3 stops18h 04m

Milan Malpensa

Wed 8/26

12:20 pm-12:49 pm

2 stops31h 29m

$600

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Fri 8/7

5:33 pm-10:20 am

2 stops33h 47m

Milan Malpensa

Sat 8/22

12:20 pm-12:13 pm

2 stops30h 53m

$609

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 4/22

9:35 pm-7:45 am

1 stop28h 10m

Dublin

Wed 4/29

10:30 am-7:30 pm

1 stop15h 00m

$652

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Mon 8/17

1:01 pm-10:20 am

1 stop14h 19m

Rome Fiumicino

Wed 8/26

10:00 am-7:14 pm

1 stop16h 14m

$685

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 9/1

6:06 am-11:00 am

1 stop20h 54m

Athens Eleftherios V.

Thu 9/10

6:55 am-6:02 pm

2 stops19h 07m

$822

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Tue 9/1

7:23 am-11:00 am

1 stop19h 37m

Athens Eleftherios V.

Thu 9/10

7:25 am-6:58 pm

2 stops19h 33m

$832

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $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	$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?
As of March 2026, there are 12 operators available to choose from 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 Airlines	PriceFrom $390	Free Cancellation	Rating 7.1 11,475 reviews	Search American Airlines flights
British Airways	PriceFrom $470	Free Cancellation	Rating 6.7 7,801 reviews	Search British Airways flights
Lufthansa	PriceFrom $482	Free Cancellation	Rating 6.8 7,856 reviews	Search Lufthansa flights
Delta	PriceFrom $489	Free Cancellation	Rating 7.9 8,296 reviews	Search Delta flights
KLM	PriceFrom $507	Free Cancellation	Rating 7.8 1,472 reviews	Search KLM flights
Iberia	PriceFrom $552	Free Cancellation	Rating 7.0 3,142 reviews	Search Iberia flights
United Airlines	PriceFrom $555	Free Cancellation	Rating 7.4 9,441 reviews	Search United Airlines flights
Scandinavian Airlines	PriceFrom $561	Free Cancellation	Rating 7.3 1,719 reviews	Search Scandinavian Airlines flights
Air Canada	PriceFrom $572	Free Cancellation	Rating 7.1 10,815 reviews	Search Air Canada flights
Air France	PriceFrom $616	Free Cancellation	Rating 7.4 1,547 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.

An easier way to manage your Europe trip

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Find better results for your trip to Europe

Popular cities

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Complete your trip

Feeling lucky

Popular cities in Europe

Flights to Londonfrom $403

Flights to Parisfrom $303

Flights to Copenhagenfrom $371

Flights to Istanbulfrom $529

Flights to Romefrom $436

Flights to Barcelonafrom $390

Flights to Athensfrom $329

Flights to Madridfrom $373

Flights to Lisbonfrom $435

Flights to Stockholmfrom $314

Flights to Amsterdamfrom $389

Flights to Milanfrom $406

Cheap flights from St. Louis to Europe from $292

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 4/19. 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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Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets

Aer Lingus flights from St. Louis to Europe

Our best Aer Lingus deals on St. Louis to Europe flight tickets

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Use the filters below to find and compare flights from St. Louis to Europe that are best for you.

How to get the cheapest flight ticket from St. Louis to Europe

What is the cheapest month to fly to Europe?

What is the cheapest day to depart on your flight to Europe?

What is the cheapest Lambert-St Louis to Europe flight route?

How far in advance should I book a flight to Europe?

What cabin class options are available on Lambert-St Louis to Europe flights?

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

What is the cheapest airline that flies from Lambert-St Louis to Europe?

What airlines fly to Europe?

How many flights depart from St. Louis to Europe on average per week?

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

Fastest flight time

Direct flights

Airports in Europe

Best airlines flying from St. Louis to Europe

Compare and see reviews for airlines that fly from St. Louis to Europe with momondo

Why use momondo?

An easier way to manage your Europe trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Europe

Popular cities in Europe

Popular flights according to clicks in the last 7 days on momondo

St. Louis flight routes

According to popular flight searches on momondo this year

Europe flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Europe

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Europe

List of cabin classes available on flights landing in Europe. Availability may vary depending on flight origin and airline.

Complete your trip to Europe

Explore popular destinations other users love

According to popular flight searches on momondo this year