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Cheap flights from St. Louis to Ireland from $320

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 7/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
British Airways Logo
4:46 pm - 1:30 pm
STL
-
DUB
14h 44m
2 stops
British Airways Logo
11:10 am - 7:30 pm
DUB
-
STL
14h 20m
1 stop
$405British Airways
mar., abr. 14 - mié., abr. 22
British Airways Logo
9:37 am - 10:15 am
STL
-
DUB
18h 38m
2 stops
British Airways Logo
12:50 pm - 7:30 pm
DUB
-
STL
12h 40m
1 stop
$406British Airways
mar., abr. 14 - mié., abr. 22
British Airways Logo
2:19 pm - 10:15 am
STL
-
DUB
13h 56m
2 stops
British Airways Logo
8:50 am - 9:12 pm
DUB
-
STL
18h 22m
2 stops
$411British Airways
lun., feb. 23 - mar., mar. 3
British Airways Logo
2:06 pm - 10:15 am
STL
-
DUB
14h 09m
2 stops
British Airways Logo
7:35 am - 6:52 pm
DUB
-
STL
17h 17m
2 stops
$412British Airways
mar., feb. 17 - mar., feb. 24
British Airways Logo
3:54 pm - 3:25 pm
STL
-
ORK
17h 31m
2 stops
British Airways Logo
4:05 pm - 4:58 pm
ORK
-
STL
30h 53m
2 stops
$415British Airways
mié., feb. 11 - lun., feb. 16
United Airlines Logo
8:30 am - 7:20 am
STL
-
DUB
16h 50m
1 stop
United Airlines Logo
9:50 am - 3:24 pm
DUB
-
STL
11h 34m
1 stop
$425United Airlines
mar., abr. 14 - mié., abr. 22
American Airlines Logo
2:00 pm - 9:10 am
STL
-
DUB
13h 10m
2 stops
American Airlines Logo
4:40 pm - 8:41 am
DUB
-
STL
22h 01m
1 stop
$426American Airlines
mié., feb. 18 - mié., feb. 25
American Airlines Logo
6:00 am - 6:20 am
STL
-
SNN
18h 20m
2 stops
American Airlines Logo
2:45 pm - 11:29 am
SNN
-
STL
25h 44m
1 stop
$498American Airlines
jue., mar. 5 - jue., mar. 12
Lufthansa Logo
6:49 pm - 4:30 pm
STL
-
ORK
39h 41m
2 stops
Lufthansa Logo
5:05 pm - 1:25 pm
ORK
-
STL
26h 20m
1 stop
$660Lufthansa
sáb., may. 2 - jue., may. 7
Air Canada Logo
9:57 am - 11:10 am
STL
-
ORK
19h 13m
3 stops
Air Canada Logo
7:40 am - 9:05 pm
ORK
-
STL
19h 25m
3 stops
$702Air Canada
mié., feb. 11 - lun., feb. 16

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
Apr 5
STL4:05 pmLambert-St Louis
10h 10m
1 stop
DUB8:15 amDublin
Apr 14
DUB9:50 amDublin
11h 34m
1 stop
STL3:24 pmLambert-St Louis
$429
Air Canada
Feb 1
STL9:57 amLambert-St Louis
15h 13m
2 stops
DUB7:10 amDublin
Feb 13
DUB9:00 amDublin
18h 40m
2 stops
STL9:40 pmLambert-St Louis
$439
Air Canada
Feb 26
STL9:55 amLambert-St Louis
15h 15m
2 stops
DUB7:10 amDublin
Mar 2
DUB9:00 amDublin
18h 05m
2 stops
STL9:05 pmLambert-St Louis
$489

Lufthansa flights from St. Louis to Ireland

Our best Lufthansa deals on St. Louis to Ireland flight tickets
Lufthansa
Mar 1
STL3:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Mar 7
DUB5:20 pmDublin
26h 35m
1 stop
STL1:55 pmLambert-St Louis
$498
Lufthansa
Apr 15
STL4:05 pmLambert-St Louis
10h 10m
1 stop
DUB8:15 amDublin
Apr 27
DUB9:30 amDublin
20h 27m
1 stop
STL11:57 pmLambert-St Louis
$502
Lufthansa
Apr 15
STL4:05 pmLambert-St Louis
10h 10m
1 stop
DUB8:15 amDublin
Apr 25
DUB9:30 amDublin
18h 58m
2 stops
STL10:28 pmLambert-St Louis
$514

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 enero 21, 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

mar. 4/14

4:46 pm-1:30 pm

2 stops14h 44m

Dublin

mié. 4/22

11:10 am-7:30 pm

1 stop14h 20m

$405

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 4/14

9:37 am-10:15 am

2 stops18h 38m

Dublin

mié. 4/22

12:50 pm-7:30 pm

1 stop12h 40m

$406

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

lun. 2/23

2:19 pm-10:15 am

2 stops13h 56m

Dublin

mar. 3/3

8:50 am-9:12 pm

2 stops18h 22m

$411

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 2/17

2:06 pm-10:15 am

2 stops14h 09m

Dublin

mar. 2/24

7:35 am-6:52 pm

2 stops17h 17m

$412

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mié. 2/11

3:54 pm-3:25 pm

2 stops17h 31m

Cork

lun. 2/16

4:05 pm-4:58 pm

2 stops30h 53m

$415

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 4/14

8:30 am-7:20 am

1 stop16h 50m

Dublin

mié. 4/22

9:50 am-3:24 pm

1 stop11h 34m

$425

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mié. 2/18

2:00 pm-9:10 am

2 stops13h 10m

Dublin

mié. 2/25

4:40 pm-8:41 am

1 stop22h 01m

$426

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

jue. 3/5

6:00 am-6:20 am

2 stops18h 20m

Shannon

jue. 3/12

2:45 pm-11:29 am

1 stop25h 44m

$498

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

sáb. 5/2

6:49 pm-4:30 pm

2 stops39h 41m

Cork

jue. 5/7

5:05 pm-1:25 pm

1 stop26h 20m

$660

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mié. 2/11

9:57 am-11:10 am

3 stops19h 13m

Cork

lun. 2/16

7:40 am-9:05 pm

3 stops19h 25m

$702

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 $639.

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 $796 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 $608 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

11h 00m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 11h 00m
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
1,442 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,736 reviews
Search Lufthansa flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,644 reviews
Search Air Canada flights
United AirlinesPriceFrom $472Free CancellationRating
7.4
9,190 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,094 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,086 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.2
11,169 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.2
1,440 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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