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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 5/26. 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 round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:00 pm
DUB
-
STL
30h 40m
1 stop
$325Aer Lingus
Wed, Sep 9 - Wed, Sep 16
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:00 pm
DUB
-
STL
30h 40m
1 stop
$326Aer Lingus
Sun, Sep 6 - Tue, Sep 15
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:00 pm
DUB
-
STL
12h 40m
1 stop
$335Aer Lingus
Mon, Sep 7 - Wed, Sep 16
United Airlines Logo
1:36 pm - 10:15 am
STL
-
SNN
14h 39m
2 stops
United Airlines Logo
12:30 pm - 11:00 pm
SNN
-
STL
16h 30m
2 stops
$698United Airlines
Tue, Sep 1 - Tue, Sep 15
United Airlines Logo
12:27 pm - 10:15 am
STL
-
SNN
15h 48m
1 stop
United Airlines Logo
9:30 am - 6:16 pm
SNN
-
STL
14h 46m
1 stop
$709United Airlines
Tue, Sep 1 - Fri, Sep 4
Air Canada Logo
2:40 pm - 4:10 pm
STL
-
SNN
19h 30m
2 stops
Air Canada Logo
7:30 am - 8:00 pm
SNN
-
STL
18h 30m
2 stops
$800Air Canada
Thu, Sep 17 - Tue, Sep 29
Delta Logo
10:33 am - 2:40 pm
STL
-
ORK
22h 07m
2 stops
Delta Logo
6:15 am - 4:55 pm
ORK
-
STL
16h 40m
2 stops
$827Delta
Sun, Aug 23 - Wed, Sep 9
British Airways Logo
9:40 pm - 7:50 pm
STL
-
ORK
16h 10m
1 stop
British Airways Logo
11:25 am - 7:30 pm
ORK
-
STL
14h 05m
1 stop
$986British Airways
Sun, Aug 23 - Wed, Sep 9
British Airways Logo
9:40 pm - 11:50 pm
STL
-
ORK
20h 10m
1 stop
British Airways Logo
11:25 am - 7:30 pm
ORK
-
STL
14h 05m
1 stop
$987British Airways
Sun, Aug 23 - Wed, Sep 9
Air Canada Logo
12:10 pm - 7:50 pm
STL
-
ORK
25h 40m
2 stops
Air Canada Logo
7:10 am - 12:30 am
ORK
-
STL
23h 20m
3 stops
$1,130Air Canada
Sun, Aug 23 - Wed, Sep 9

Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets
Aer Lingus
Sep 9
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 16
DUB1:20 pmDublin
30h 40m
1 stop
STL2:00 pmLambert-St Louis
$325
Aer Lingus
Sep 6
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 15
DUB1:20 pmDublin
30h 40m
1 stop
STL2:00 pmLambert-St Louis
$326
Aer Lingus
Sep 7
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 16
DUB1:20 pmDublin
12h 40m
1 stop
STL8:00 pmLambert-St Louis
$335

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
Sep 1
STL2:40 pmLambert-St Louis
11h 35m
1 stop
DUB8:15 amDublin
Sep 10
DUB9:50 amDublin
16h 10m
1 stop
STL8:00 pmLambert-St Louis
$649
Air Canada
Sep 17
STL2:40 pmLambert-St Louis
19h 30m
2 stops
SNN4:10 pmShannon
Sep 29
SNN7:30 amShannon
18h 30m
2 stops
STL8:00 pmLambert-St Louis
$800
Air Canada
Sep 9
STL12:10 pmLambert-St Louis
26h 25m
2 stops
SNN8:35 pmShannon
Sep 22
SNN7:30 amShannon
19h 52m
3 stops
STL9:22 pmLambert-St Louis
$976

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated May 15, 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 round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 9/16

1:20 pm-2:00 pm

1 stop30h 40m

$325

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 9/6

8:55 am-5:10 am

1 stop14h 15m

Dublin

Tue 9/15

1:20 pm-2:00 pm

1 stop30h 40m

$326
Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/7

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 9/16

1:20 pm-8:00 pm

1 stop12h 40m

$335

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

1:36 pm-10:15 am

2 stops14h 39m

Shannon

Tue 9/15

12:30 pm-11:00 pm

2 stops16h 30m

$698

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

12:27 pm-10:15 am

1 stop15h 48m

Shannon

Fri 9/4

9:30 am-6:16 pm

1 stop14h 46m

$709

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 9/17

2:40 pm-4:10 pm

2 stops19h 30m

Shannon

Tue 9/29

7:30 am-8:00 pm

2 stops18h 30m

$800

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

10:33 am-2:40 pm

2 stops22h 07m

Cork

Wed 9/9

6:15 am-4:55 pm

2 stops16h 40m

$827

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-7:50 pm

1 stop16h 10m

Cork

Wed 9/9

11:25 am-7:30 pm

1 stop14h 05m

$986

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-11:50 pm

1 stop20h 10m

Cork

Wed 9/9

11:25 am-7:30 pm

1 stop14h 05m

$987

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

12:10 pm-7:50 pm

2 stops25h 40m

Cork

Wed 9/9

7:10 am-12:30 am

3 stops23h 20m

$1,130

Flights are sorted by cheapest round-trip 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?

In general, October is the cheapest month to fly from St. Louis to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $383. If you aren’t able to travel to Ireland during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $385.

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 $724 when searching weeks out. 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 $592 on momondo.

Can stopping save me money on St. Louis to Ireland flights?

You could potentially save up to 20% on your flight if you consider stops on a St. Louis to Ireland flight.

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

14h 05m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 14h 05m
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 refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Ireland?

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

    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 Ireland.

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

    The travel and health documents required for your trip to Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
KLMPriceFrom $412Free CancellationRating
7.8
1,517 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,982 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
8,004 reviews
Search Lufthansa flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
11,046 reviews
Search Air Canada flights
United AirlinesPriceFrom $456Free CancellationRating
7.4
9,727 reviews
Search United Airlines flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,218 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,455 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.3
1,563 reviews
Search Aer Lingus flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Ireland. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for St. Louis to Ireland flights to just show those with flexible booking policies.

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?

Price alerts on flights to Ireland from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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