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Cheap flights from St. Louis to Europe from $226

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 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Aer Lingus Logo
4:15 pm - 5:10 am
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
1:00 pm - 3:30 pm
DUB
-
STL
32h 30m
1 stop
$350Aer Lingus
Mon, Oct 26 - Wed, Nov 4
Aer Lingus Logo
4:15 pm - 5:10 am
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
1:00 pm - 3:30 pm
DUB
-
STL
32h 30m
1 stop
$351Aer Lingus
Mon, Oct 26 - Wed, Nov 4
Lufthansa Logo
8:15 pm - 6:15 am
STL
-
FRA
52h 00m
2 stops
Lufthansa Logo
4:20 pm - 10:54 pm
FRA
-
STL
37h 34m
2 stops
$788Lufthansa
Fri, Oct 30 - Mon, Nov 2
British Airways Logo
9:35 pm - 8:30 pm
STL
-
BCN
15h 55m
1 stop
British Airways Logo
11:50 am - 7:30 pm
BCN
-
STL
14h 40m
1 stop
$789British Airways
Wed, Aug 19 - Tue, Oct 20
Lufthansa Logo
12:59 pm - 11:55 am
STL
-
BCN
15h 56m
2 stops
Lufthansa Logo
8:00 am - 9:24 pm
BCN
-
STL
20h 24m
2 stops
$814Lufthansa
Wed, Aug 19 - Tue, Oct 20
American Airlines Logo
9:40 pm - 8:20 pm
STL
-
BCN
15h 40m
1 stop
American Airlines Logo
7:10 pm - 8:20 am
BCN
-
STL
20h 10m
1 stop
$815American Airlines
Sun, Sep 20 - Sun, Sep 27
British Airways Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
British Airways Logo
7:50 am - 7:30 pm
BCN
-
STL
18h 40m
1 stop
$822British Airways
Wed, Oct 7 - Sun, Oct 18
American Airlines Logo
6:00 pm - 12:40 pm
STL
-
BCN
11h 40m
1 stop
American Airlines Logo
7:10 pm - 8:20 am
BCN
-
STL
20h 10m
1 stop
$823American Airlines
Sun, Sep 20 - Sun, Sep 27
United Airlines Logo
4:15 pm - 11:00 am
STL
-
ATH
34h 45m
1 stop
United Airlines Logo
1:00 pm - 6:38 pm
ATH
-
STL
37h 38m
2 stops
$848United Airlines
Mon, Nov 2 - Mon, Nov 9
United Airlines Logo
5:30 pm - 11:45 am
STL
-
FCO
35h 15m
2 stops
United Airlines Logo
6:50 am - 1:25 pm
FCO
-
STL
13h 35m
1 stop
$866United Airlines
Sat, Aug 15 - Sun, Aug 23

Delta flights from St. Louis to Europe

Our best Delta deals on St. Louis to Europe flight tickets
Delta
Oct 4
STL7:20 amLambert-St Louis
18h 25m
2 stops
BCN8:45 amBarcelona-El Prat
Oct 15
BCN6:20 amBarcelona-El Prat
21h 17m
2 stops
STL8:37 pmLambert-St Louis
$813
Delta
Oct 7
STL4:13 pmLambert-St Louis
15h 37m
2 stops
BCN2:50 pmBarcelona-El Prat
Oct 18
BCN10:55 amBarcelona-El Prat
19h 44m
2 stops
STL11:39 pmLambert-St Louis
$862
Delta
Aug 2
STL1:54 pmLambert-St Louis
11h 16m
1 stop
LHR7:10 amLondon Heathrow
Aug 13
LHR9:55 amLondon Heathrow
16h 47m
2 stops
STL8:42 pmLambert-St Louis
$1,007

Iberia flights from St. Louis to Europe

Our best Iberia deals on St. Louis to Europe flight tickets
Iberia
Oct 5
STL8:05 pmLambert-St Louis
14h 30m
2 stops
BCN5:35 pmBarcelona-El Prat
Oct 16
BCN7:40 amBarcelona-El Prat
18h 50m
1 stop
STL7:30 pmLambert-St Louis
$775
Iberia
Oct 17
STL8:05 pmLambert-St Louis
33h 40m
2 stops
BCN12:45 pmBarcelona-El Prat
Oct 26
BCN9:15 pmBarcelona-El Prat
28h 53m
2 stops
STL8:08 pmLambert-St Louis
$810
Iberia
May 27
STL7:50 pmLambert-St Louis
10h 25m
1 stop
LHR12:15 pmLondon Heathrow
Jun 1
LHR7:25 pmLondon Heathrow
29h 55m
2 stops
STL7:20 pmLambert-St Louis
$1,457

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 26, 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

Mon 10/26

4:15 pm-5:10 am

1 stop31h 55m

Dublin

Wed 11/4

1:00 pm-3:30 pm

1 stop32h 30m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 10/26

4:15 pm-5:10 am

1 stop31h 55m

Dublin

Wed 11/4

1:00 pm-3:30 pm

1 stop32h 30m

$351

St. LouisFrankfurt am Main

STL - FRA

STLFRA

Lambert-St Louis

Fri 10/30

8:15 pm-6:15 am

2 stops52h 00m

Frankfurt am Main

Mon 11/2

4:20 pm-10:54 pm

2 stops37h 34m

$788
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

9:35 pm-8:30 pm

1 stop15h 55m

Barcelona-El Prat

Tue 10/20

11:50 am-7:30 pm

1 stop14h 40m

$789

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

12:59 pm-11:55 am

2 stops15h 56m

Barcelona-El Prat

Tue 10/20

8:00 am-9:24 pm

2 stops20h 24m

$814

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

9:40 pm-8:20 pm

1 stop15h 40m

Barcelona-El Prat

Sun 9/27

7:10 pm-8:20 am

1 stop20h 10m

$815

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Sun 10/18

7:50 am-7:30 pm

1 stop18h 40m

$822

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

6:00 pm-12:40 pm

1 stop11h 40m

Barcelona-El Prat

Sun 9/27

7:10 pm-8:20 am

1 stop20h 10m

$823

St. LouisAthens

STL - ATH

STLATH

Lambert-St Louis

Mon 11/2

4:15 pm-11:00 am

1 stop34h 45m

Athens Eleftherios V.

Mon 11/9

1:00 pm-6:38 pm

2 stops37h 38m

$848

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

Sat 8/15

5:30 pm-11:45 am

2 stops35h 15m

Rome Fiumicino

Sun 8/23

6:50 am-1:25 pm

1 stop13h 35m

$866

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 February is also cheap. Prices for this month can be found on momondo for an average of $385.

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 $756. Flights from St. Louis to Europe on a Friday will generally be more expensive and average around $1,146. 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 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 $867 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 $705 on momondo.

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

There are 3 cabin classes available to choose from on 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 54% 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

$420

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 $420. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $1,076.
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
8,423 reviews
Search Delta flights
American AirlinesPriceFrom $390Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
British AirwaysPriceFrom $470Free CancellationRating
6.7
8,006 reviews
Search British Airways flights
LufthansaPriceFrom $482Free CancellationRating
6.8
8,033 reviews
Search Lufthansa flights
KLMPriceFrom $507Free CancellationRating
7.8
1,522 reviews
Search KLM flights
Virgin AtlanticPriceFrom $538Free CancellationRating
7.5
689 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,753 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $561Free CancellationRating
7.4
1,793 reviews
Search Scandinavian Airlines flights
IberiaPriceFrom $568Free CancellationRating
7.0
3,220 reviews
Search Iberia flights
Air CanadaPriceFrom $572Free CancellationRating
7.1
11,091 reviews
Search Air Canada 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

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