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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 9/1. 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
4:15 pm - 5:10 am
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
1:00 pm - 3:30 pm
DUB
-
STL
32h 30m
1 stop
$350Aer Lingus
Mon, Oct 26 - Wed, Nov 4
Aer Lingus Logo
4:15 pm - 5:10 am
STL
-
DUB
31h 55m
1 stop
Aer Lingus Logo
1:00 pm - 3:30 pm
DUB
-
STL
32h 30m
1 stop
$351Aer Lingus
Mon, Oct 26 - Wed, Nov 4
United Airlines Logo
12:27 pm - 10:15 am
STL
-
SNN
15h 48m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$758United Airlines
Tue, Sep 1 - Mon, Sep 7
United Airlines Logo
5:30 pm - 10:15 am
STL
-
SNN
34h 45m
2 stops
United Airlines Logo
9:30 am - 6:16 pm
SNN
-
STL
14h 46m
1 stop
$768United Airlines
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 - 11:37 pm
ORK
-
STL
23h 22m
2 stops
$889Delta
Sun, Aug 23 - Wed, Sep 9
Delta Logo
10:45 am - 2:40 pm
STL
-
ORK
21h 55m
2 stops
Delta Logo
6:00 am - 12:18 am
ORK
-
STL
23h 18m
2 stops
$937Delta
Thu, Oct 15 - Sun, Nov 1
British Airways Logo
9:40 pm - 3:10 pm
STL
-
ORK
11h 30m
1 stop
British Airways Logo
7:10 am - 8:03 pm
ORK
-
STL
18h 53m
2 stops
$1,014British Airways
Sun, Aug 23 - Wed, Sep 9
British Airways Logo
9:40 pm - 3:10 pm
STL
-
ORK
11h 30m
1 stop
British Airways Logo
11:25 am - 7:30 pm
ORK
-
STL
14h 05m
1 stop
$1,031British 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 - 9:31 pm
ORK
-
STL
20h 21m
3 stops
$1,057Air Canada
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 - 9:31 pm
ORK
-
STL
20h 21m
3 stops
$1,068Air 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
Oct 26
STL4:15 pmLambert-St Louis
31h 55m
1 stop
DUB5:10 amDublin
Nov 4
DUB1:00 pmDublin
32h 30m
1 stop
STL3:30 pmLambert-St Louis
$350
Aer Lingus
Oct 26
STL4:15 pmLambert-St Louis
31h 55m
1 stop
DUB5:10 amDublin
Nov 4
DUB1:00 pmDublin
32h 30m
1 stop
STL3:30 pmLambert-St Louis
$351
Aer Lingus
Sep 1
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
$354

Austrian Airlines flights from St. Louis to Ireland

Our best Austrian Airlines deals on St. Louis to Ireland flight tickets
Austrian Airlines
Oct 28
STL11:45 amLambert-St Louis
14h 45m
1 stop
DUB7:30 amDublin
Nov 4
DUB9:30 amDublin
16h 10m
1 stop
STL7:40 pmLambert-St Louis
$644
Austrian Airlines
Oct 26
STL11:45 amLambert-St Louis
14h 45m
1 stop
DUB7:30 amDublin
Nov 2
DUB9:30 amDublin
16h 10m
1 stop
STL7:40 pmLambert-St Louis
$716
Austrian Airlines
May 28
STL12:23 pmLambert-St Louis
13h 07m
1 stop
DUB7:30 amDublin
Jun 3
DUB9:30 amDublin
20h 05m
1 stop
STL11:35 pmLambert-St Louis
$1,100

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 27, 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

Mon 10/26

4:15 pm-5:10 am

1 stop31h 55m

Dublin

Wed 11/4

1:00 pm-3:30 pm

1 stop32h 30m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 10/26

4:15 pm-5:10 am

1 stop31h 55m

Dublin

Wed 11/4

1:00 pm-3:30 pm

1 stop32h 30m

$351

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

12:27 pm-10:15 am

1 stop15h 48m

Shannon

Mon 9/7

9:30 am-3:38 pm

1 stop12h 08m

$758

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 9/5

5:30 pm-10:15 am

2 stops34h 45m

Shannon

Sun 9/13

9:30 am-6:16 pm

1 stop14h 46m

$768

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-11:37 pm

2 stops23h 22m

$889

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Thu 10/15

10:45 am-2:40 pm

2 stops21h 55m

Cork

Sun 11/1

6:00 am-12:18 am

2 stops23h 18m

$937

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-3:10 pm

1 stop11h 30m

Cork

Wed 9/9

7:10 am-8:03 pm

2 stops18h 53m

$1,014
Quickest round-trip

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-3:10 pm

1 stop11h 30m

Cork

Wed 9/9

11:25 am-7:30 pm

1 stop14h 05m

$1,031

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-9:31 pm

3 stops20h 21m

$1,057

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-9:31 pm

3 stops20h 21m

$1,068

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 $322. If you aren’t able to travel to Ireland during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $383.

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 $718 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 $477 on momondo.

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

You could potentially save up to 61% 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

11h 58m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 11h 58m
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
1,587 reviews
Search Aer Lingus flights
KLMPriceFrom $412Free CancellationRating
7.8
1,524 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
8,007 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
8,032 reviews
Search Lufthansa flights
United AirlinesPriceFrom $449Free CancellationRating
7.4
9,751 reviews
Search United Airlines flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
11,092 reviews
Search Air Canada flights
IberiaPriceFrom $465Free CancellationRating
7.0
3,220 reviews
Search Iberia flights
American AirlinesPriceFrom $482Free CancellationRating
7.1
11,639 reviews
Search American Airlines flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,424 reviews
Search Delta 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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Find better results for your trip to Ireland

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