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Cheap flights from St. Louis to Ireland from $225

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 9/8. 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

Discover deals from 900+ travel sites with momondo.

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 - 8:20 pm
DUB
-
STL
13h 00m
1 stop
$350Aer Lingus
mar., sept. 8 - mar., sept. 15
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:24 pm
DUB
-
STL
13h 04m
1 stop
$355Aer Lingus
mar., août 18 - ven., août 28
Aer Lingus Logo
4:05 pm - 5:10 am
STL
-
DUB
31h 05m
1 stop
Aer Lingus Logo
1:00 pm - 3:26 pm
DUB
-
STL
32h 26m
1 stop
$357Aer Lingus
lun., nov. 9 - jeu., nov. 19
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:24 pm
DUB
-
STL
13h 04m
1 stop
$365Aer Lingus
mar., août 11 - jeu., août 20
Delta Logo
6:30 am - 10:20 am
STL
-
ORK
21h 50m
2 stops
Delta Logo
6:15 am - 11:16 pm
ORK
-
STL
23h 01m
2 stops
$770Delta
mar., sept. 1 - mar., sept. 8
United Airlines Logo
4:50 pm - 10:15 am
STL
-
SNN
11h 25m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$779United Airlines
dim., août 16 - ven., août 28
United Airlines Logo
8:00 am - 10:15 am
STL
-
SNN
20h 15m
2 stops
United Airlines Logo
9:30 am - 2:57 pm
SNN
-
STL
11h 27m
1 stop
$783United Airlines
dim., août 16 - ven., août 28
Delta Logo
11:13 am - 2:40 pm
STL
-
ORK
21h 27m
2 stops
Delta Logo
6:15 am - 11:26 pm
ORK
-
STL
23h 11m
2 stops
$816Delta
dim., août 16 - dim., août 23
Air Canada Logo
8:55 am - 3:10 pm
STL
-
ORK
24h 15m
2 stops
Air Canada Logo
11:25 am - 10:12 am
ORK
-
STL
28h 47m
3 stops
$995Air Canada
mar., sept. 1 - mar., sept. 8
British Airways Logo
9:40 pm - 11:50 pm
STL
-
ORK
20h 10m
1 stop
British Airways Logo
7:10 am - 10:41 pm
ORK
-
STL
21h 31m
2 stops
$1,006British Airways
dim., août 16 - dim., août 23

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Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets
Aer Lingus
Sep 8
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 15
DUB1:20 pmDublin
13h 00m
1 stop
STL8:20 pmLambert-St Louis
$350
Aer Lingus
Aug 18
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Aug 27
DUB1:20 pmDublin
13h 04m
1 stop
STL8:24 pmLambert-St Louis
$355
Aer Lingus
Nov 9
STL4:05 pmLambert-St Louis
31h 05m
1 stop
DUB5:10 amDublin
Nov 19
DUB1:00 pmDublin
32h 26m
1 stop
STL3:26 pmLambert-St Louis
$357

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Aug 16
STL4:50 pmLambert-St Louis
11h 25m
1 stop
SNN10:15 amShannon
Aug 28
SNN9:30 amShannon
12h 08m
1 stop
STL3:38 pmLambert-St Louis
$779
United Airlines
Aug 16
STL8:00 amLambert-St Louis
20h 15m
2 stops
SNN10:15 amShannon
Aug 28
SNN9:30 amShannon
11h 27m
1 stop
STL2:57 pmLambert-St Louis
$783
United Airlines
Sep 2
STL7:00 amLambert-St Louis
21h 15m
1 stop
SNN10:15 amShannon
Sep 9
SNN9:30 amShannon
14h 46m
1 stop
STL6:16 pmLambert-St Louis
$785

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 juillet 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

mar. 9/8

8:55 am-5:10 am

1 stop14h 15m

Dublin

mar. 9/15

1:20 pm-8:20 pm

1 stop13h 00m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 8/18

8:55 am-5:10 am

1 stop14h 15m

Dublin

ven. 8/28

1:20 pm-8:24 pm

1 stop13h 04m

$355

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

lun. 11/9

4:05 pm-5:10 am

1 stop31h 05m

Dublin

jeu. 11/19

1:00 pm-3:26 pm

1 stop32h 26m

$357

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 8/11

8:55 am-5:10 am

1 stop14h 15m

Dublin

jeu. 8/20

1:20 pm-8:24 pm

1 stop13h 04m

$365

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mar. 9/1

6:30 am-10:20 am

2 stops21h 50m

Cork

mar. 9/8

6:15 am-11:16 pm

2 stops23h 01m

$770
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

dim. 8/16

4:50 pm-10:15 am

1 stop11h 25m

Shannon

ven. 8/28

9:30 am-3:38 pm

1 stop12h 08m

$779

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

dim. 8/16

8:00 am-10:15 am

2 stops20h 15m

Shannon

ven. 8/28

9:30 am-2:57 pm

1 stop11h 27m

$783

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

dim. 8/16

11:13 am-2:40 pm

2 stops21h 27m

Cork

dim. 8/23

6:15 am-11:26 pm

2 stops23h 11m

$816

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mar. 9/1

8:55 am-3:10 pm

2 stops24h 15m

Cork

mar. 9/8

11:25 am-10:12 am

3 stops28h 47m

$995

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

dim. 8/16

9:40 pm-11:50 pm

1 stop20h 10m

Cork

dim. 8/23

7:10 am-10:41 pm

2 stops21h 31m

$1,006

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, September 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 $467. If you aren’t able to travel to Ireland during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $531.

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 $758 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 $581 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 10m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 10m
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
1,678 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $429Free CancellationRating
6.7
8,125 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
8,159 reviews
Search Lufthansa flights
United AirlinesPriceFrom $471Free CancellationRating
7.4
10,020 reviews
Search United Airlines flights
Air CanadaPriceFrom $474Free CancellationRating
7.1
11,373 reviews
Search Air Canada flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,258 reviews
Search Iberia flights
DeltaPriceFrom $484Free CancellationRating
7.8
8,477 reviews
Search Delta flights
American AirlinesPriceFrom $488Free CancellationRating
7.1
11,836 reviews
Search American Airlines flights
KLMPriceFrom $532Free CancellationRating
7.8
1,544 reviews
Search KLM 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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ven. 8/21
ven. 8/28
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