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Cheap flights from St. Louis to Ireland from €350

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 Ireland departing on 25/4. 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
0 bags

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Find the cheapest flights from St. Louis to Ireland

Cheap return flights

Enter your travel dates to find the best prices.
Air Canada Logo
14:40 - 08:15
STL
-
DUB
11h 35m
1 stop
Air Canada Logo
09:20 - 12:13
DUB
-
STL
32h 53m
2 stops
€552Air Canada
Tue, 11 Aug - Wed, 19 Aug
Air Canada Logo
12:10 - 07:45
STL
-
DUB
13h 35m
1 stop
Air Canada Logo
09:50 - 18:42
DUB
-
STL
14h 52m
1 stop
€555Air Canada
Sun, 16 Aug - Tue, 25 Aug
United Airlines Logo
17:32 - 09:45
STL
-
DUB
10h 13m
1 stop
United Airlines Logo
09:20 - 14:02
DUB
-
STL
10h 42m
1 stop
€560United Airlines
Tue, 11 Aug - Wed, 19 Aug
Lufthansa Logo
15:30 - 11:40
STL
-
DUB
14h 10m
1 stop
Lufthansa Logo
05:55 - 13:25
DUB
-
STL
13h 30m
1 stop
€568Lufthansa
Mon, 17 Aug - Wed, 26 Aug
United Airlines Logo
10:24 - 07:30
STL
-
SNN
15h 06m
1 stop
United Airlines Logo
09:30 - 14:25
SNN
-
STL
10h 55m
1 stop
€570United Airlines
Sun, 16 Aug - Fri, 28 Aug
KLM Logo
19:05 - 11:10
STL
-
SNN
34h 05m
2 stops
KLM Logo
13:05 - 23:37
SNN
-
STL
16h 32m
2 stops
€573KLM
Sun, 16 Aug - Fri, 28 Aug
KLM Logo
16:13 - 11:10
STL
-
SNN
12h 57m
1 stop
KLM Logo
13:05 - 16:55
SNN
-
STL
33h 50m
1 stop
€574KLM
Sun, 16 Aug - Fri, 28 Aug
Lufthansa Logo
18:55 - 16:50
STL
-
DUB
15h 55m
2 stops
Lufthansa Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€576Lufthansa
Tue, 25 Aug - Tue, 15 Sep
Multiple Airlines Logo
08:55 - 08:15
STL
-
DUB
17h 20m
1 stop
Multiple Airlines Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€584Multiple Airlines
Wed, 2 Sep - Tue, 8 Sep
Multiple Airlines Logo
12:10 - 08:15
STL
-
DUB
38h 05m
2 stops
Multiple Airlines Logo
06:05 - 13:25
DUB
-
STL
13h 20m
1 stop
€587Multiple Airlines
Mon, 31 Aug - Fri, 11 Sep

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
11 Aug
STL17:32Lambert-St Louis
10h 13m
1 stop
DUB09:45Dublin
19 Aug
DUB09:20Dublin
10h 42m
1 stop
STL14:02Lambert-St Louis
€560
United Airlines
16 Aug
STL10:24Lambert-St Louis
15h 06m
1 stop
SNN07:30Shannon
28 Aug
SNN09:30Shannon
10h 55m
1 stop
STL14:25Lambert-St Louis
€570
United Airlines
15 Aug
STL18:55Lambert-St Louis
30h 35m
1 stop
SNN07:30Shannon
21 Aug
SNN09:30Shannon
12h 08m
1 stop
STL15:38Lambert-St Louis
€571

KLM flights from St. Louis to Ireland

Our best KLM deals on St. Louis to Ireland flight tickets
KLM
16 Aug
STL19:05Lambert-St Louis
34h 05m
2 stops
SNN11:10Shannon
28 Aug
SNN13:05Shannon
16h 32m
2 stops
STL23:37Lambert-St Louis
€573
KLM
16 Aug
STL16:13Lambert-St Louis
12h 57m
1 stop
SNN11:10Shannon
28 Aug
SNN13:05Shannon
33h 50m
1 stop
STL16:55Lambert-St Louis
€574
KLM
16 Aug
STL16:13Lambert-St Louis
12h 57m
1 stop
SNN11:10Shannon
28 Aug
SNN13:05Shannon
16h 32m
2 stops
STL23:37Lambert-St Louis
€617

momondo Fare Finder

 
Customise your flight search to find flights from St. Louis to Ireland 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 13,528 searches. Data last updated 27 March 2026.
Use the filters below to find and compare flights from St. Louis to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/8

14:40-08:15

1 stop11h 35m

Dublin

Wed 19/8

09:20-12:13

2 stops32h 53m

€552

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 16/8

12:10-07:45

1 stop13h 35m

Dublin

Tue 25/8

09:50-18:42

1 stop14h 52m

€555
Fastest return journey

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/8

17:32-09:45

1 stop10h 13m

Dublin

Wed 19/8

09:20-14:02

1 stop10h 42m

€560

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 17/8

15:30-11:40

1 stop14h 10m

Dublin

Wed 26/8

05:55-13:25

1 stop13h 30m

€568

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

10:24-07:30

1 stop15h 06m

Shannon

Fri 28/8

09:30-14:25

1 stop10h 55m

€570

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

19:05-11:10

2 stops34h 05m

Shannon

Fri 28/8

13:05-23:37

2 stops16h 32m

€573

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

16:13-11:10

1 stop12h 57m

Shannon

Fri 28/8

13:05-16:55

1 stop33h 50m

€574

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 25/8

18:55-16:50

2 stops15h 55m

Dublin

Tue 15/9

06:00-13:25

1 stop13h 25m

€576

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/9

08:55-08:15

1 stop17h 20m

Dublin

Tue 8/9

06:00-13:25

1 stop13h 25m

€584

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 31/8

12:10-08:15

2 stops38h 05m

Dublin

Fri 11/9

06:05-13:25

1 stop13h 20m

€587

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Ireland from

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

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 Ireland?

The month of February is another great option to travel to Ireland, with average flight prices from St. Louis averaging around €470.

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

You are more likely to see cheaper flights to Ireland from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around €635 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from St. Louis for as low as €494 on momondo.

Cheap St. Louis to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ireland

Fastest flight time

10h 12m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 12m
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Ireland?

    Prices for flights from Lambert-St Louis Airport to Ireland are updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Ireland?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ireland.

  • What documentation or ID do you need to fly to Ireland?

    The travel and health documents you'll need for your trip to Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Ireland

Compare and see reviews for airlines that fly from St. Louis to Ireland with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom €494Free CancellationRating
7.1
11,507 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Ireland?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Ireland for you.

Can I find flights from St. Louis to Ireland with flexible booking policies on momondo?

Yes. All flights to Ireland from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Ireland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Ireland.

I’m not ready to book a flight from St. Louis to Ireland right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Ireland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ireland and let you know when they change.

An easier way to manage your Ireland trip

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Find better results for your trip to Ireland

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