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Cheap flights from St. Louis to Ireland from $404

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 4/25. 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.
United Airlines Logo
6:00 am - 9:45 am
STL
-
DUB
21h 45m
1 stop
United Airlines Logo
9:20 am - 12:13 pm
DUB
-
STL
32h 53m
2 stops
$629United Airlines
Mon, Sep 7 - Tue, Sep 15
Multiple Airlines Logo
2:40 pm - 8:15 am
STL
-
DUB
11h 35m
1 stop
Multiple Airlines Logo
6:00 am - 1:25 pm
DUB
-
STL
13h 25m
1 stop
$630Multiple Airlines
Mon, Sep 7 - Tue, Sep 15
United Airlines Logo
5:00 am - 7:45 am
STL
-
DUB
20h 45m
2 stops
United Airlines Logo
9:20 am - 11:06 am
DUB
-
STL
31h 46m
2 stops
$632United Airlines
Wed, Sep 2 - Tue, Sep 8
Air Canada Logo
2:40 pm - 8:15 am
STL
-
DUB
11h 35m
1 stop
Air Canada Logo
9:20 am - 12:13 pm
DUB
-
STL
32h 53m
2 stops
$637Air Canada
Tue, Aug 11 - Wed, Aug 19
Air Canada Logo
6:00 am - 7:45 am
STL
-
DUB
19h 45m
2 stops
Air Canada Logo
9:50 am - 6:42 pm
DUB
-
STL
14h 52m
1 stop
$646Air Canada
Sun, Aug 16 - Tue, Aug 25
Lufthansa Logo
3:30 pm - 11:40 am
STL
-
DUB
14h 10m
1 stop
Lufthansa Logo
5:55 am - 1:25 pm
DUB
-
STL
13h 30m
1 stop
$656Lufthansa
Mon, Aug 17 - Wed, Aug 26
Delta Logo
10:50 am - 2:40 pm
STL
-
ORK
21h 50m
2 stops
Delta Logo
6:15 am - 5:16 pm
ORK
-
STL
17h 01m
2 stops
$831Delta
Tue, May 5 - Thu, May 21
Delta Logo
4:41 pm - 2:40 pm
STL
-
ORK
15h 59m
2 stops
Delta Logo
6:15 am - 8:50 pm
ORK
-
STL
20h 35m
2 stops
$882Delta
Mon, Apr 27 - Wed, Sep 23
Lufthansa Logo
1:10 pm - 4:30 pm
STL
-
ORK
21h 20m
2 stops
Lufthansa Logo
5:05 pm - 3:38 pm
ORK
-
STL
52h 33m
2 stops
$1,003Lufthansa
Wed, Apr 29 - Wed, Sep 23
British Airways Logo
9:40 pm - 7:50 pm
STL
-
ORK
16h 10m
1 stop
British Airways Logo
4:10 pm - 10:00 pm
ORK
-
STL
35h 50m
2 stops
$1,025British Airways
Sun, Apr 26 - Wed, Sep 23

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Apr 5
STL7:45 amLambert-St Louis
20h 00m
1 stop
DUB9:45 amDublin
Apr 15
DUB9:50 amDublin
41h 04m
2 stops
STL8:54 pmLambert-St Louis
$683
United Airlines
Apr 5
STL8:21 amLambert-St Louis
16h 59m
2 stops
DUB7:20 amDublin
Apr 15
DUB9:50 amDublin
41h 04m
2 stops
STL8:54 pmLambert-St Louis
$687
United Airlines
Apr 25
STL4:49 pmLambert-St Louis
34h 56m
2 stops
DUB9:45 amDublin
May 6
DUB9:20 amDublin
32h 46m
1 stop
STL12:06 pmLambert-St Louis
$694

KLM flights from St. Louis to Ireland

Our best KLM deals on St. Louis to Ireland flight tickets
KLM
Apr 25
STL5:35 pmLambert-St Louis
32h 20m
1 stop
DUB7:55 amDublin
May 6
DUB11:00 amDublin
16h 19m
1 stop
STL9:19 pmLambert-St Louis
$707
KLM
Apr 23
STL11:42 amLambert-St Louis
15h 03m
1 stop
DUB8:45 amDublin
Apr 30
DUB5:55 amDublin
14h 34m
2 stops
STL2:29 pmLambert-St Louis
$814
KLM
May 5
STL5:59 pmLambert-St Louis
16h 41m
2 stops
ORK4:40 pmCork
May 21
ORK6:15 amCork
20h 54m
2 stops
STL9:09 pmLambert-St Louis
$835

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 March 26, 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 9/7

6:00 am-9:45 am

1 stop21h 45m

Dublin

Tue 9/15

9:20 am-12:13 pm

2 stops32h 53m

$629
Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/7

2:40 pm-8:15 am

1 stop11h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$630

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/2

5:00 am-7:45 am

2 stops20h 45m

Dublin

Tue 9/8

9:20 am-11:06 am

2 stops31h 46m

$632

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

2:40 pm-8:15 am

1 stop11h 35m

Dublin

Wed 8/19

9:20 am-12:13 pm

2 stops32h 53m

$637

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/16

6:00 am-7:45 am

2 stops19h 45m

Dublin

Tue 8/25

9:50 am-6:42 pm

1 stop14h 52m

$646

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/17

3:30 pm-11:40 am

1 stop14h 10m

Dublin

Wed 8/26

5:55 am-1:25 pm

1 stop13h 30m

$656

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 5/5

10:50 am-2:40 pm

2 stops21h 50m

Cork

Thu 5/21

6:15 am-5:16 pm

2 stops17h 01m

$831

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Mon 4/27

4:41 pm-2:40 pm

2 stops15h 59m

Cork

Wed 9/23

6:15 am-8:50 pm

2 stops20h 35m

$882

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 4/29

1:10 pm-4:30 pm

2 stops21h 20m

Cork

Wed 9/23

5:05 pm-3:38 pm

2 stops52h 33m

$1,003

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 4/26

9:40 pm-7:50 pm

1 stop16h 10m

Cork

Wed 9/23

4:10 pm-10:00 pm

2 stops35h 50m

$1,025

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, January 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 $523. If you aren’t able to travel to Ireland during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $543.

How far in advance should I book a flight 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 $733 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 53% 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

10h 12m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 12m
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
Search flight deals

  • 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
1,478 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,822 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,871 reviews
Search Lufthansa flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
10,844 reviews
Search Air Canada flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,157 reviews
Search Iberia flights
United AirlinesPriceFrom $468Free CancellationRating
7.4
9,491 reviews
Search United Airlines flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,340 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,507 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.2
1,491 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.

An easier way to manage your Ireland trip

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Find better results for your trip to Ireland

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