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Cheap flights from St. Louis to Ireland from $190

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 9/2. 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 - Tue, Sep 15
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
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
$334Aer Lingus
Tue, Sep 1 - Wed, Sep 9
United Airlines Logo
12:27 pm - 10:15 am
STL
-
SNN
15h 48m
1 stop
United Airlines Logo
9:30 am - 3:00 pm
SNN
-
STL
11h 30m
1 stop
$708United Airlines
Tue, Sep 1 - Wed, Sep 16
United Airlines Logo
8:00 am - 10:15 am
STL
-
SNN
20h 15m
2 stops
United Airlines Logo
9:30 am - 8:38 pm
SNN
-
STL
17h 08m
2 stops
$713United Airlines
Tue, Sep 1 - Wed, Sep 16
KLM Logo
1:30 pm - 11:10 am
STL
-
SNN
15h 40m
2 stops
KLM Logo
1:05 pm - 3:57 pm
SNN
-
STL
32h 52m
2 stops
$816KLM
Sat, Sep 5 - Sun, Sep 13
Delta Logo
10:33 am - 2:40 pm
STL
-
ORK
22h 07m
2 stops
Delta Logo
6:15 am - 8:50 pm
ORK
-
STL
20h 35m
2 stops
$859Delta
Sun, Aug 23 - Wed, Sep 9
Delta Logo
6:04 pm - 4:45 pm
STL
-
ORK
16h 41m
2 stops
Delta Logo
6:15 am - 11:53 pm
ORK
-
STL
23h 38m
2 stops
$983Delta
Tue, Jul 7 - Thu, Jul 30
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 - 7:50 pm
STL
-
ORK
16h 10m
1 stop
British Airways Logo
11:25 am - 11:33 pm
ORK
-
STL
18h 08m
2 stops
$995British Airways
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 15
DUB1:20 pmDublin
30h 40m
1 stop
STL2:00 pmLambert-St Louis
$325
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
$326
Aer Lingus
Sep 1
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 9
DUB1:20 pmDublin
30h 40m
1 stop
STL2:00 pmLambert-St Louis
$334

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
Sep 2
STL12:10 pmLambert-St Louis
13h 35m
1 stop
DUB7:45 amDublin
Sep 16
DUB9:20 amDublin
32h 37m
2 stops
STL11:57 amLambert-St Louis
$683
Air Canada
Sep 1
STL2:40 pmLambert-St Louis
35h 05m
2 stops
DUB7:45 amDublin
Sep 8
DUB9:20 amDublin
32h 37m
2 stops
STL11:57 amLambert-St Louis
$686
Air Canada
Sep 9
STL8:50 amLambert-St Louis
16h 55m
2 stops
DUB7:45 amDublin
Sep 16
DUB9:20 amDublin
32h 37m
2 stops
STL11:57 amLambert-St Louis
$687

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 22, 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

Tue 9/15

1:20 pm-2:00 pm

1 stop30h 40m

$325

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

$326

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 9/1

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 9/9

1:20 pm-2:00 pm

1 stop30h 40m

$334
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

12:27 pm-10:15 am

1 stop15h 48m

Shannon

Wed 9/16

9:30 am-3:00 pm

1 stop11h 30m

$708

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

8:00 am-10:15 am

2 stops20h 15m

Shannon

Wed 9/16

9:30 am-8:38 pm

2 stops17h 08m

$713

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 9/5

1:30 pm-11:10 am

2 stops15h 40m

Shannon

Sun 9/13

1:05 pm-3:57 pm

2 stops32h 52m

$816

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-8:50 pm

2 stops20h 35m

$859

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 7/7

6:04 pm-4:45 pm

2 stops16h 41m

Cork

Thu 7/30

6:15 am-11:53 pm

2 stops23h 38m

$983

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-7:50 pm

1 stop16h 10m

Cork

Wed 9/9

11:25 am-11:33 pm

2 stops18h 08m

$995

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 $719 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 $571 on momondo.

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

You could potentially save up to 51% 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

9h 55m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 9h 55m
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
Aer LingusPriceFrom $325Free CancellationRating
7.3
1,578 reviews
Search Aer Lingus flights
KLMPriceFrom $412Free CancellationRating
7.8
1,519 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,995 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
8,019 reviews
Search Lufthansa flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
11,076 reviews
Search Air Canada flights
United AirlinesPriceFrom $456Free CancellationRating
7.4
9,753 reviews
Search United Airlines flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,219 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,445 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,648 reviews
Search American Airlines 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.

An easier way to manage your Ireland trip

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