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Cheap flights from St. Louis to Ireland from €239

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 15/10. 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 Ireland

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
16:15 - 05:10
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
13:00 - 15:30
DUB
-
STL
32h 30m
1 stop
€304Aer Lingus
Mon, 26 Oct - Wed, 4 Nov
Aer Lingus Logo
16:15 - 05:10
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
13:00 - 15:30
DUB
-
STL
32h 30m
1 stop
€305Aer Lingus
Mon, 26 Oct - Wed, 4 Nov
Aer Lingus Logo
08:55 - 05:10
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
13:20 - 14:02
DUB
-
STL
30h 42m
1 stop
€307Aer Lingus
Tue, 11 Aug - Wed, 19 Aug
Aer Lingus Logo
08:55 - 05:10
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
13:20 - 20:00
DUB
-
STL
12h 40m
1 stop
€308Aer Lingus
Mon, 7 Sep - Wed, 16 Sep
Lufthansa Logo
08:50 - 07:30
STL
-
SNN
16h 40m
1 stop
Lufthansa Logo
12:30 - 23:38
SNN
-
STL
17h 08m
1 stop
€667Lufthansa
Wed, 9 Sep - Tue, 22 Sep
United Airlines Logo
08:00 - 07:30
STL
-
SNN
17h 30m
1 stop
United Airlines Logo
12:30 - 23:38
SNN
-
STL
17h 08m
1 stop
€668United Airlines
Wed, 9 Sep - Tue, 22 Sep
United Airlines Logo
08:40 - 07:30
STL
-
SNN
16h 50m
2 stops
United Airlines Logo
12:30 - 10:10
SNN
-
STL
27h 40m
2 stops
€672United Airlines
Wed, 9 Sep - Tue, 22 Sep
Lufthansa Logo
16:50 - 10:15
STL
-
SNN
11h 25m
1 stop
Lufthansa Logo
12:30 - 23:38
SNN
-
STL
17h 08m
1 stop
€675Lufthansa
Sun, 16 Aug - Fri, 28 Aug
United Airlines Logo
08:00 - 07:30
STL
-
SNN
17h 30m
1 stop
United Airlines Logo
12:30 - 23:38
SNN
-
STL
17h 08m
1 stop
€676United Airlines
Sun, 23 Aug - Wed, 9 Sep
Lufthansa Logo
12:20 - 10:15
STL
-
SNN
15h 55m
1 stop
Lufthansa Logo
12:30 - 11:03
SNN
-
STL
28h 33m
1 stop
€716Lufthansa
Mon, 5 Oct - Wed, 14 Oct

Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets
Aer Lingus
26 Oct
STL16:15Lambert-St Louis
31h 55m
1 stop
DUB05:10Dublin
4 Nov
DUB13:00Dublin
32h 30m
1 stop
STL15:30Lambert-St Louis
€304
Aer Lingus
26 Oct
STL16:15Lambert-St Louis
31h 55m
1 stop
DUB05:10Dublin
4 Nov
DUB13:00Dublin
32h 30m
1 stop
STL15:30Lambert-St Louis
€305
Aer Lingus
11 Aug
STL08:55Lambert-St Louis
14h 15m
1 stop
DUB05:10Dublin
19 Aug
DUB13:20Dublin
30h 42m
1 stop
STL14:02Lambert-St Louis
€307

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
26 Oct
STL11:45Lambert-St Louis
14h 45m
1 stop
DUB07:30Dublin
6 Nov
DUB09:00Dublin
12h 30m
1 stop
STL15:30Lambert-St Louis
€600
United Airlines
6 Sept
STL12:59Lambert-St Louis
12h 46m
2 stops
DUB07:45Dublin
15 Sept
DUB09:20Dublin
15h 21m
1 stop
STL18:41Lambert-St Louis
€603
United Airlines
8 Sept
STL17:30Lambert-St Louis
32h 45m
2 stops
DUB08:15Dublin
15 Sept
DUB09:20Dublin
15h 21m
1 stop
STL18:41Lambert-St Louis
€604

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 7 June 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

Mon 26/10

16:15-05:10

1 stop31h 55m

Dublin

Wed 4/11

13:00-15:30

1 stop32h 30m

€304

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 26/10

16:15-05:10

1 stop31h 55m

Dublin

Wed 4/11

13:00-15:30

1 stop32h 30m

€305

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/8

08:55-05:10

1 stop14h 15m

Dublin

Wed 19/8

13:20-14:02

1 stop30h 42m

€307
Fastest return journey

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 7/9

08:55-05:10

1 stop14h 15m

Dublin

Wed 16/9

13:20-20:00

1 stop12h 40m

€308

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

08:50-07:30

1 stop16h 40m

Shannon

Tue 22/9

12:30-23:38

1 stop17h 08m

€667

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

08:00-07:30

1 stop17h 30m

Shannon

Tue 22/9

12:30-23:38

1 stop17h 08m

€668

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

08:40-07:30

2 stops16h 50m

Shannon

Tue 22/9

12:30-10:10

2 stops27h 40m

€672

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

16:50-10:15

1 stop11h 25m

Shannon

Fri 28/8

12:30-23:38

1 stop17h 08m

€675

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 23/8

08:00-07:30

1 stop17h 30m

Shannon

Wed 9/9

12:30-23:38

1 stop17h 08m

€676

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 5/10

12:20-10:15

1 stop15h 55m

Shannon

Wed 14/10

12:30-11:03

1 stop28h 33m

€716

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 October is another great option to travel to Ireland, with average flight prices from St. Louis averaging around €303.

How far in advance should I book a flight from St. Louis 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 €623 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 €414 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 08m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 08m
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
Search flight deals

Frequently asked questions about flying from St. Louis to Ireland

  • 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.

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.

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