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Cheap flights from St. Louis to Europe from $221

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 3/23. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
4:46 pm - 1:30 pm
STL
-
DUB
14h 44m
2 stops
British Airways Logo
11:10 am - 7:30 pm
DUB
-
STL
14h 20m
1 stop
$405British Airways
mar., abr. 14 - mié., abr. 22
British Airways Logo
9:37 am - 10:15 am
STL
-
DUB
18h 38m
2 stops
British Airways Logo
12:50 pm - 7:30 pm
DUB
-
STL
12h 40m
1 stop
$406British Airways
mar., abr. 14 - mié., abr. 22
United Airlines Logo
8:30 am - 7:20 am
STL
-
DUB
16h 50m
1 stop
United Airlines Logo
9:50 am - 3:24 pm
DUB
-
STL
11h 34m
1 stop
$425United Airlines
mar., abr. 14 - mié., abr. 22
American Airlines Logo
2:00 pm - 9:10 am
STL
-
DUB
13h 10m
2 stops
American Airlines Logo
4:40 pm - 8:41 am
DUB
-
STL
22h 01m
1 stop
$426American Airlines
mié., feb. 18 - mié., feb. 25
Air Canada Logo
4:05 pm - 11:05 am
STL
-
FCO
12h 00m
1 stop
Air Canada Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$441Air Canada
mié., feb. 25 - mié., mar. 4
United Airlines Logo
7:41 am - 7:45 am
STL
-
FCO
17h 04m
1 stop
United Airlines Logo
1:05 pm - 9:40 pm
FCO
-
STL
39h 35m
2 stops
$442United Airlines
mar., feb. 24 - mar., mar. 3
Air Canada Logo
7:41 am - 11:05 am
STL
-
FCO
20h 24m
2 stops
Air Canada Logo
1:15 pm - 2:42 pm
FCO
-
STL
32h 27m
2 stops
$445Air Canada
mié., feb. 25 - mié., mar. 4
American Airlines Logo
6:38 pm - 4:55 pm
STL
-
FCO
15h 17m
2 stops
American Airlines Logo
1:10 pm - 11:48 pm
FCO
-
STL
16h 38m
2 stops
$448American Airlines
dom., feb. 22 - mar., mar. 10
Lufthansa Logo
9:00 am - 10:45 pm
STL
-
IST
29h 45m
2 stops
Lufthansa Logo
5:40 am - 1:25 pm
IST
-
STL
15h 45m
1 stop
$548Lufthansa
mar., mar. 17 - mié., abr. 15
Lufthansa Logo
6:35 pm - 2:05 am
STL
-
IST
23h 30m
2 stops
Lufthansa Logo
1:55 pm - 1:25 pm
IST
-
STL
31h 30m
1 stop
$554Lufthansa
lun., abr. 20 - sáb., may. 2

Lufthansa flights from St. Louis to Europe

Our best Lufthansa deals on St. Louis to Europe flight tickets
Lufthansa
Feb 2
STL5:59 pmLambert-St Louis
29h 46m
1 stop
FCO6:45 amRome Fiumicino
Feb 11
FCO11:15 amRome Fiumicino
40h 50m
2 stops
STL9:05 pmLambert-St Louis
$491
Lufthansa
Feb 2
STL5:59 pmLambert-St Louis
29h 46m
1 stop
FCO6:45 amRome Fiumicino
Feb 12
FCO7:00 amRome Fiumicino
20h 26m
2 stops
STL8:26 pmLambert-St Louis
$497
Lufthansa
Mar 1
STL3:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Mar 7
DUB5:20 pmDublin
26h 35m
1 stop
STL1:55 pmLambert-St Louis
$498

United Airlines flights from St. Louis to Europe

Our best United Airlines deals on St. Louis to Europe flight tickets
United Airlines
Apr 14
STL8:30 amLambert-St Louis
16h 50m
1 stop
DUB7:20 amDublin
Apr 22
DUB9:50 amDublin
11h 34m
1 stop
STL3:24 pmLambert-St Louis
$425
United Airlines
Feb 22
STL6:25 amLambert-St Louis
19h 45m
1 stop
DUB8:10 amDublin
Mar 2
DUB9:00 amDublin
43h 14m
2 stops
STL10:14 pmLambert-St Louis
$433
United Airlines
Feb 17
STL11:25 amLambert-St Louis
14h 45m
1 stop
DUB8:10 amDublin
Feb 24
DUB9:30 amDublin
13h 30m
1 stop
STL5:00 pmLambert-St Louis
$434

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 enero 21, 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

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 4/14

4:46 pm-1:30 pm

2 stops14h 44m

Dublin

mié. 4/22

11:10 am-7:30 pm

1 stop14h 20m

$405

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 4/14

9:37 am-10:15 am

2 stops18h 38m

Dublin

mié. 4/22

12:50 pm-7:30 pm

1 stop12h 40m

$406

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 4/14

8:30 am-7:20 am

1 stop16h 50m

Dublin

mié. 4/22

9:50 am-3:24 pm

1 stop11h 34m

$425

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mié. 2/18

2:00 pm-9:10 am

2 stops13h 10m

Dublin

mié. 2/25

4:40 pm-8:41 am

1 stop22h 01m

$426

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mié. 2/25

4:05 pm-11:05 am

1 stop12h 00m

Rome Fiumicino

mié. 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$441

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mar. 2/24

7:41 am-7:45 am

1 stop17h 04m

Rome Fiumicino

mar. 3/3

1:05 pm-9:40 pm

2 stops39h 35m

$442

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

mié. 2/25

7:41 am-11:05 am

2 stops20h 24m

Rome Fiumicino

mié. 3/4

1:15 pm-2:42 pm

2 stops32h 27m

$445

St. LouisRome

STL - FCO

STLFCO

Lambert-St Louis

dom. 2/22

6:38 pm-4:55 pm

2 stops15h 17m

Rome Fiumicino

mar. 3/10

1:10 pm-11:48 pm

2 stops16h 38m

$448

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

mar. 3/17

9:00 am-10:45 pm

2 stops29h 45m

Istanbul

mié. 4/15

5:40 am-1:25 pm

1 stop15h 45m

$548

St. LouisIstanbul

STL - IST

STLIST

Lambert-St Louis

lun. 4/20

6:35 pm-2:05 am

2 stops23h 30m

Istanbul

sáb. 5/2

1:55 pm-1:25 pm

1 stop31h 30m

$554

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 October. Flight prices, which tend to average around $709, 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 October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $709.

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 $668. Flights from St. Louis to Europe on a Saturday will generally be more expensive and average around $863. 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 $868 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 $768 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 33% 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

$439

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 $439. The best round-trip flight deal from St. Louis to Europe found on momondo in the last 72 hours is $691.
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 Frankfurt am Main (FRA), 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
7.2
11,174 reviews
Search American Airlines flights
LufthansaPriceFrom $482Free CancellationRating
6.8
7,738 reviews
Search Lufthansa flights
British AirwaysPriceFrom $505Free CancellationRating
6.7
7,689 reviews
Search British Airways flights
KLMPriceFrom $507Free CancellationRating
7.7
1,442 reviews
Search KLM flights
Austrian AirlinesPriceFrom $509Free CancellationRating
7.6
894 reviews
Search Austrian Airlines flights
DeltaPriceFrom $557Free CancellationRating
7.9
8,088 reviews
Search Delta flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
IberiaPriceFrom $571Free CancellationRating
7.0
3,094 reviews
Search Iberia flights
Air CanadaPriceFrom $573Free CancellationRating
7.1
10,646 reviews
Search Air Canada flights
Air FrancePriceFrom $582Free CancellationRating
7.4
1,523 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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