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Cheap flights from St. Louis to Ireland from $193

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 5/10. 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.
Lufthansa Logo
11:05 am - 8:10 am
STL
-
DUB
15h 05m1 stop
Lufthansa Logo
10:40 am - 10:58 pm
DUB
-
STL
18h 18m1 stop
$430Lufthansa
Mon, Jan 5 - Mon, Jan 12
Multiple Airlines Logo
6:35 pm - 8:10 am
STL
-
DUB
31h 35m1 stop
Multiple Airlines Logo
9:30 am - 11:59 pm
DUB
-
STL
20h 29m1 stop
$431Multiple Airlines
Mon, Jan 5 - Mon, Jan 12
Austrian Airlines Logo
11:22 am - 7:30 am
STL
-
DUB
14h 08m1 stop
Austrian Airlines Logo
9:30 am - 11:59 pm
DUB
-
STL
20h 29m1 stop
$432Austrian Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
11:20 am - 8:10 am
STL
-
DUB
14h 50m1 stop
United Airlines Logo
9:00 am - 10:00 pm
DUB
-
STL
43h 00m2 stops
$456United Airlines
Thu, Jan 22 - Mon, Jan 26
Air Canada Logo
4:05 pm - 6:10 am
STL
-
DUB
32h 05m1 stop
Air Canada Logo
8:00 am - 2:49 pm
DUB
-
STL
35h 49m2 stops
$458Air Canada
Fri, Mar 6 - Mon, Mar 16
United Airlines Logo
10:07 am - 7:30 am
STL
-
DUB
15h 23m2 stops
United Airlines Logo
9:00 am - 10:00 pm
DUB
-
STL
43h 00m2 stops
$460United Airlines
Thu, Jan 22 - Mon, Jan 26
Air Canada Logo
9:57 am - 7:10 am
STL
-
DUB
15h 13m2 stops
Air Canada Logo
9:00 am - 2:30 pm
DUB
-
STL
35h 30m2 stops
$462Air Canada
Sat, Jan 10 - Sat, Jan 17
British Airways Logo
2:54 pm - 12:10 pm
STL
-
DUB
15h 16m2 stops
British Airways Logo
10:55 am - 10:59 pm
DUB
-
STL
18h 04m2 stops
$465British Airways
Tue, Jan 27 - Tue, Feb 3
American Airlines Logo
6:44 pm - 3:25 pm
STL
-
ORK
14h 41m2 stops
American Airlines Logo
7:40 am - 7:29 pm
ORK
-
STL
17h 49m2 stops
$486American Airlines
Wed, Jan 14 - Thu, Jan 29
American Airlines Logo
2:00 pm - 11:20 am
STL
-
SNN
15h 20m2 stops
American Airlines Logo
7:40 am - 9:11 pm
SNN
-
STL
19h 31m2 stops
$571American Airlines
Wed, Apr 1 - Mon, Apr 6

Lufthansa flights from St. Louis to Ireland

Our best Lufthansa deals on St. Louis to Ireland flight tickets
Lufthansa
Jan 5
STL11:05 amLambert-St Louis
15h 05m
1 stop
DUB8:10 amDublin
Jan 12
DUB10:40 amDublin
18h 18m
1 stop
STL10:58 pmLambert-St Louis
$430
Find similar
Lufthansa
Jan 8
STL1:15 pmLambert-St Louis
12h 55m
1 stop
DUB8:10 amDublin
Jan 12
DUB9:30 amDublin
20h 29m
1 stop
STL11:59 pmLambert-St Louis
$480
Find similar
Lufthansa
Mar 8
STL4:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Mar 18
DUB5:10 amDublin
14h 45m
1 stop
STL2:55 pmLambert-St Louis
$481
Find similar

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
Mar 6
STL4:05 pmLambert-St Louis
32h 05m
1 stop
DUB6:10 amDublin
Mar 16
DUB8:00 amDublin
35h 49m
2 stops
STL2:49 pmLambert-St Louis
$458
Find similar
Air Canada
Jan 10
STL9:57 amLambert-St Louis
15h 13m
2 stops
DUB7:10 amDublin
Jan 17
DUB9:00 amDublin
35h 30m
2 stops
STL2:30 pmLambert-St Louis
$462
Find similar
Air Canada
Jan 26
STL4:49 pmLambert-St Louis
32h 21m
2 stops
DUB7:10 amDublin
Feb 2
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$471
Find similar

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 January 1, 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

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 1/5

11:05 am-8:10 am

1 stop15h 05m

Dublin

Mon 1/12

10:40 am-10:58 pm

1 stop18h 18m

$430

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 1/5

6:35 pm-8:10 am

1 stop31h 35m

Dublin

Mon 1/12

9:30 am-11:59 pm

1 stop20h 29m

$431

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/8

11:22 am-7:30 am

1 stop14h 08m

Dublin

Mon 1/12

9:30 am-11:59 pm

1 stop20h 29m

$432

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/22

11:20 am-8:10 am

1 stop14h 50m

Dublin

Mon 1/26

9:00 am-10:00 pm

2 stops43h 00m

$456

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 3/6

4:05 pm-6:10 am

1 stop32h 05m

Dublin

Mon 3/16

8:00 am-2:49 pm

2 stops35h 49m

$458

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/22

10:07 am-7:30 am

2 stops15h 23m

Dublin

Mon 1/26

9:00 am-10:00 pm

2 stops43h 00m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 1/10

9:57 am-7:10 am

2 stops15h 13m

Dublin

Sat 1/17

9:00 am-2:30 pm

2 stops35h 30m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 1/27

2:54 pm-12:10 pm

2 stops15h 16m

Dublin

Tue 2/3

10:55 am-10:59 pm

2 stops18h 04m

$465

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 1/14

6:44 pm-3:25 pm

2 stops14h 41m

Cork

Thu 1/29

7:40 am-7:29 pm

2 stops17h 49m

$486

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/1

2:00 pm-11:20 am

2 stops15h 20m

Shannon

Mon 4/6

7:40 am-9:11 pm

2 stops19h 31m

$571

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, November 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 $563. If you aren’t able to travel to Ireland during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $650.

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 $812 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 $614 on momondo.

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

You could potentially save up to 44% 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 55m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 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

  • 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
7.7
1,435 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,571 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,632 reviews
Search British Airways flights
LufthansaPriceFrom $465Free CancellationRating
6.8
7,675 reviews
Search Lufthansa flights
United AirlinesPriceFrom $481Free CancellationRating
7.4
9,125 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,058 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,011 reviews
Search Delta flights
American AirlinesPriceFrom $485Free CancellationRating
7.2
11,069 reviews
Search American Airlines flights
Aer LingusPriceFrom $759Free CancellationRating
7.2
1,418 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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