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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 1/8. 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
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
1:15 pm - 8:10 am
STL
-
DUB
12h 55m1 stop
Lufthansa Logo
5:10 am - 1:55 pm
DUB
-
STL
14h 45m1 stop
$420Lufthansa
jue., ene. 22 - mié., ene. 28
Lufthansa Logo
1:15 pm - 8:10 am
STL
-
DUB
12h 55m1 stop
Lufthansa Logo
10:40 am - 5:43 pm
DUB
-
STL
13h 03m1 stop
$432Lufthansa
jue., ene. 8 - jue., ene. 15
United Airlines Logo
1:15 pm - 8:10 am
STL
-
DUB
12h 55m1 stop
United Airlines Logo
9:00 am - 10:00 pm
DUB
-
STL
43h 00m2 stops
$455United Airlines
jue., ene. 22 - lun., ene. 26
United Airlines Logo
11:20 am - 7:30 am
STL
-
DUB
14h 10m2 stops
United Airlines Logo
9:00 am - 12:29 pm
DUB
-
STL
33h 29m2 stops
$460United Airlines
sáb., ene. 17 - sáb., ene. 24
British Airways Logo
11:05 am - 9:40 am
STL
-
DUB
16h 35m2 stops
British Airways Logo
8:50 am - 9:15 pm
DUB
-
STL
18h 25m2 stops
$462British Airways
mié., ene. 14 - mié., ene. 28
British Airways Logo
12:06 pm - 9:50 am
STL
-
DUB
15h 44m2 stops
British Airways Logo
10:55 am - 1:03 pm
DUB
-
STL
32h 08m2 stops
$467British Airways
sáb., ene. 10 - sáb., ene. 17
American Airlines Logo
6:44 pm - 4:45 pm
STL
-
SNN
16h 01m2 stops
American Airlines Logo
7:50 am - 9:15 pm
SNN
-
STL
19h 25m2 stops
$484American Airlines
mié., ene. 14 - mié., ene. 21
American Airlines Logo
5:04 pm - 3:25 pm
STL
-
ORK
16h 21m2 stops
American Airlines Logo
7:40 am - 11:12 pm
ORK
-
STL
21h 32m2 stops
$485American Airlines
mié., ene. 14 - jue., ene. 29
Air Canada Logo
4:05 pm - 11:25 pm
STL
-
ORK
49h 20m2 stops
Air Canada Logo
11:55 am - 3:29 pm
ORK
-
STL
57h 34m2 stops
$683Air Canada
mié., feb. 4 - dom., feb. 8
Air Canada Logo
11:25 am - 11:10 am
STL
-
ORK
18h 45m3 stops
Air Canada Logo
7:20 am - 9:03 pm
ORK
-
STL
19h 43m3 stops
$816Air Canada
mié., mar. 25 - sáb., abr. 4

Austrian Airlines flights from St. Louis to Ireland

Our best Austrian Airlines deals on St. Louis to Ireland flight tickets
Austrian Airlines
Jan 27
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Feb 3
DUB9:30 amDublin
20h 29m
1 stop
STL11:59 pmLambert-St Louis
$433
Find similar
Austrian Airlines
Dec 15
STL11:50 amLambert-St Louis
13h 40m
1 stop
DUB7:30 amDublin
Dec 19
DUB9:30 amDublin
20h 13m
1 stop
STL11:43 pmLambert-St Louis
$8,220
Find similar
Austrian Airlines
Dec 14
STL11:50 amLambert-St Louis
13h 40m
1 stop
DUB7:30 amDublin
Dec 18
DUB9:30 amDublin
20h 13m
1 stop
STL11:43 pmLambert-St Louis
$9,036
Find similar

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Jan 22
STL1:15 pmLambert-St Louis
12h 55m
1 stop
DUB8:10 amDublin
Jan 26
DUB9:00 amDublin
43h 00m
2 stops
STL10:00 pmLambert-St Louis
$455
Find similar
United Airlines
Jan 17
STL11:20 amLambert-St Louis
14h 10m
2 stops
DUB7:30 amDublin
Jan 24
DUB9:00 amDublin
33h 29m
2 stops
STL12:29 pmLambert-St Louis
$460
Find similar
United Airlines
Jan 29
STL9:57 amLambert-St Louis
16h 13m
1 stop
DUB8:10 amDublin
Feb 2
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$468
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 diciembre 11, 2025.
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

jue. 1/22

1:15 pm-8:10 am

1 stop12h 55m

Dublin

mié. 1/28

5:10 am-1:55 pm

1 stop14h 45m

$420

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 1/8

1:15 pm-8:10 am

1 stop12h 55m

Dublin

jue. 1/15

10:40 am-5:43 pm

1 stop13h 03m

$432

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 1/22

1:15 pm-8:10 am

1 stop12h 55m

Dublin

lun. 1/26

9:00 am-10:00 pm

2 stops43h 00m

$455

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

sáb. 1/17

11:20 am-7:30 am

2 stops14h 10m

Dublin

sáb. 1/24

9:00 am-12:29 pm

2 stops33h 29m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mié. 1/14

11:05 am-9:40 am

2 stops16h 35m

Dublin

mié. 1/28

8:50 am-9:15 pm

2 stops18h 25m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

sáb. 1/10

12:06 pm-9:50 am

2 stops15h 44m

Dublin

sáb. 1/17

10:55 am-1:03 pm

2 stops32h 08m

$467

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

mié. 1/14

6:44 pm-4:45 pm

2 stops16h 01m

Shannon

mié. 1/21

7:50 am-9:15 pm

2 stops19h 25m

$484

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mié. 1/14

5:04 pm-3:25 pm

2 stops16h 21m

Cork

jue. 1/29

7:40 am-11:12 pm

2 stops21h 32m

$485

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mié. 2/4

4:05 pm-11:25 pm

2 stops49h 20m

Cork

dom. 2/8

11:55 am-3:29 pm

2 stops57h 34m

$683

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

mié. 3/25

11:25 am-11:10 am

3 stops18h 45m

Cork

sáb. 4/4

7:20 am-9:03 pm

3 stops19h 43m

$816

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 September is also cheap. Prices for this month can be found on momondo for an average of $702.

What is the cheapest day to depart on your flight to Ireland?

The cheapest day to depart on your flight to Ireland is on a Wednesday when prices can be found for as low as $865. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Ireland on a Saturday will generally be more expensive and average around $972. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ireland?

According to our data, the cheapest time of day to fly to Ireland is in the evening. momondo users have found flights departing from St. Louis to Ireland in the evening for as low as $556. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is at noon when prices are around $1,057.

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 $827 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 16% 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 13m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 13m
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
1,432 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,045 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,007 reviews
Search Delta flights
United AirlinesPriceFrom $506Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
LufthansaPriceFrom $517Free CancellationRating
6.8
7,626 reviews
Search Lufthansa flights
American AirlinesPriceFrom $548Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
Aer LingusPriceFrom $750Free CancellationRating
7.2
1,394 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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sáb. 1/10
sáb. 1/17
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