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Cheap flights from St. Louis to Europe from $349

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 8/15. 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
6:00 am - 1:25 pm
MXP
-
STL
14h 25m
1 stop
$628Lufthansa
Wed, Aug 12 - Wed, Aug 26
Lufthansa Logo
1:18 pm - 12:15 pm
STL
-
MXP
15h 57m
2 stops
Lufthansa Logo
6:00 am - 1:25 pm
MXP
-
STL
14h 25m
1 stop
$629Lufthansa
Wed, Aug 12 - Wed, Aug 26
United Airlines Logo
6:00 am - 9:45 am
STL
-
DUB
21h 45m
1 stop
United Airlines Logo
9:20 am - 12:13 pm
DUB
-
STL
32h 53m
2 stops
$629United Airlines
Mon, Sep 7 - Tue, Sep 15
United Airlines Logo
5:00 am - 7:45 am
STL
-
DUB
20h 45m
2 stops
United Airlines Logo
9:20 am - 11:06 am
DUB
-
STL
31h 46m
2 stops
$632United Airlines
Wed, Sep 2 - Tue, Sep 8
Air Canada Logo
2:40 pm - 8:15 am
STL
-
DUB
11h 35m
1 stop
Air Canada Logo
9:20 am - 12:13 pm
DUB
-
STL
32h 53m
2 stops
$637Air Canada
Tue, Aug 11 - Wed, Aug 19
Air Canada Logo
6:00 am - 7:45 am
STL
-
DUB
19h 45m
2 stops
Air Canada Logo
9:50 am - 6:42 pm
DUB
-
STL
14h 52m
1 stop
$646Air Canada
Sun, Aug 16 - Tue, Aug 25
British Airways Logo
9:35 pm - 11:35 pm
STL
-
MXP
19h 00m
1 stop
British Airways Logo
2:20 pm - 11:42 pm
MXP
-
STL
16h 22m
1 stop
$655British Airways
Wed, Aug 12 - Wed, Aug 26
American Airlines Logo
8:03 pm - 5:55 pm
STL
-
LIS
15h 52m
2 stops
American Airlines Logo
8:25 am - 7:33 pm
LIS
-
STL
17h 08m
2 stops
$666American Airlines
Mon, Apr 20 - Mon, Apr 27
American Airlines Logo
6:29 am - 9:05 am
STL
-
LIS
20h 36m
1 stop
American Airlines Logo
8:25 am - 7:33 pm
LIS
-
STL
17h 08m
2 stops
$669American Airlines
Mon, Apr 20 - Mon, Apr 27
British Airways Logo
12:59 pm - 9:05 am
STL
-
LIS
14h 06m
1 stop
British Airways Logo
7:20 am - 7:30 pm
LIS
-
STL
18h 10m
1 stop
$681British Airways
Tue, Apr 21 - Wed, Apr 29

Iberia flights from St. Louis to Europe

Our best Iberia deals on St. Louis to Europe flight tickets
Iberia
Apr 24
STL5:21 pmLambert-St Louis
24h 04m
2 stops
LIS11:25 pmLisbon Humberto Delgado
May 1
LIS8:45 pmLisbon Humberto Delgado
28h 48m
2 stops
STL7:33 pmLambert-St Louis
$738
Iberia
Aug 5
STL10:14 amLambert-St Louis
18h 51m
1 stop
FCO12:05 pmRome Fiumicino
Aug 19
FCO10:00 amRome Fiumicino
17h 19m
1 stop
STL8:19 pmLambert-St Louis
$740
Iberia
Aug 5
STL6:51 pmLambert-St Louis
17h 49m
2 stops
FCO7:40 pmRome Fiumicino
Aug 19
FCO10:00 amRome Fiumicino
16h 14m
1 stop
STL7:14 pmLambert-St Louis
$748

Air France flights from St. Louis to Europe

Our best Air France deals on St. Louis to Europe flight tickets
Air France
May 11
STL5:36 pmLambert-St Louis
15h 19m
2 stops
LIS2:55 pmLisbon Humberto Delgado
May 22
LIS5:35 amLisbon Humberto Delgado
17h 11m
2 stops
STL4:46 pmLambert-St Louis
$872
Air France
Apr 6
STL5:59 pmLambert-St Louis
16h 01m
2 stops
LGW4:00 pmLondon Gatwick
Apr 14
LGW10:35 amLondon Gatwick
16h 44m
2 stops
STL9:19 pmLambert-St Louis
$997

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 27, 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. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Wed 8/12

1:18 pm-12:15 pm

2 stops15h 57m

Milan Malpensa

Wed 8/26

6:00 am-1:25 pm

1 stop14h 25m

$628

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

6:00 am-1:25 pm

1 stop14h 25m

$629

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/7

6:00 am-9:45 am

1 stop21h 45m

Dublin

Tue 9/15

9:20 am-12:13 pm

2 stops32h 53m

$629

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/2

5:00 am-7:45 am

2 stops20h 45m

Dublin

Tue 9/8

9:20 am-11:06 am

2 stops31h 46m

$632

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

2:40 pm-8:15 am

1 stop11h 35m

Dublin

Wed 8/19

9:20 am-12:13 pm

2 stops32h 53m

$637

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/16

6:00 am-7:45 am

2 stops19h 45m

Dublin

Tue 8/25

9:50 am-6:42 pm

1 stop14h 52m

$646

St. LouisMilan

STL - MXP

STLMXP

Lambert-St Louis

Wed 8/12

9:35 pm-11:35 pm

1 stop19h 00m

Milan Malpensa

Wed 8/26

2:20 pm-11:42 pm

1 stop16h 22m

$655

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 4/20

8:03 pm-5:55 pm

2 stops15h 52m

Lisbon Humberto Delgado

Mon 4/27

8:25 am-7:33 pm

2 stops17h 08m

$666

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 4/20

6:29 am-9:05 am

1 stop20h 36m

Lisbon Humberto Delgado

Mon 4/27

8:25 am-7:33 pm

2 stops17h 08m

$669

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Tue 4/21

12:59 pm-9:05 am

1 stop14h 06m

Lisbon Humberto Delgado

Wed 4/29

7:20 am-7:30 pm

1 stop18h 10m

$681

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 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

$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 $872.
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
11,508 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
7,822 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,871 reviews
Search Lufthansa flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,342 reviews
Search Delta flights
KLMPriceFrom $507Free CancellationRating
7.8
1,478 reviews
Search KLM flights
IberiaPriceFrom $552Free CancellationRating
7.0
3,157 reviews
Search Iberia flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,493 reviews
Search United Airlines flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
10,847 reviews
Search Air Canada flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.3
1,725 reviews
Search Scandinavian Airlines flights
Air FrancePriceFrom $616Free CancellationRating
7.4
1,553 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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