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Cheap flights from St. Louis to Ireland from $409

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 3/15. 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.
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
$440Austrian Airlines
mar., ene. 13 - mar., ene. 20
United Airlines Logo
9:57 am - 8:10 am
STL
-
DUB
16h 13m1 stop
United Airlines Logo
9:00 am - 10:00 pm
DUB
-
STL
43h 00m2 stops
$456United Airlines
jue., ene. 22 - lun., ene. 26
Air Canada Logo
4:05 pm - 6:10 am
STL
-
DUB
32h 05m1 stop
Air Canada Logo
8:00 am - 9:07 pm
DUB
-
STL
42h 07m2 stops
$458Air Canada
vie., mar. 6 - lun., mar. 16
Air Canada Logo
4:49 pm - 7:10 am
STL
-
DUB
32h 21m2 stops
Air Canada Logo
9:00 am - 2:30 pm
DUB
-
STL
35h 30m2 stops
$462Air Canada
sáb., ene. 10 - mié., ene. 21
Multiple Airlines Logo
4:50 pm - 4:25 pm
STL
-
DUB
18h 35m1 stop
Multiple Airlines Logo
8:00 am - 3:29 pm
DUB
-
STL
12h 29m1 stop
$464Multiple Airlines
dom., mar. 8 - dom., mar. 15
British Airways Logo
5:04 pm - 7:40 pm
STL
-
DUB
20h 36m2 stops
British Airways Logo
10:55 am - 10:59 pm
DUB
-
STL
18h 04m2 stops
$465British Airways
mar., ene. 13 - mar., ene. 20
Multiple Airlines Logo
3:50 pm - 11:00 am
STL
-
DUB
13h 10m1 stop
Multiple Airlines Logo
9:00 am - 3:29 pm
DUB
-
STL
12h 29m1 stop
$469Multiple Airlines
dom., ene. 11 - dom., ene. 18
American Airlines Logo
10:00 pm - 8:35 pm
STL
-
SNN
16h 35m1 stop
American Airlines Logo
7:40 am - 7:30 pm
SNN
-
STL
17h 50m1 stop
$470American Airlines
mar., abr. 21 - mar., may. 5
American Airlines Logo
7:03 pm - 4:10 pm
STL
-
SNN
15h 07m2 stops
American Airlines Logo
7:40 am - 7:30 pm
SNN
-
STL
17h 50m1 stop
$474American Airlines
mar., abr. 21 - mar., may. 5
British Airways Logo
12:11 pm - 4:45 pm
STL
-
SNN
22h 34m2 stops
British Airways Logo
7:50 am - 6:34 pm
SNN
-
STL
16h 44m2 stops
$696British Airways
mié., ene. 14 - jue., ene. 29

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Apr 28
STL6:30 amLambert-St Louis
21h 15m
1 stop
DUB9:45 amDublin
May 7
DUB9:50 amDublin
32h 16m
1 stop
STL12:06 pmLambert-St Louis
$455
Find similar
United Airlines
Jan 22
STL8:05 amLambert-St Louis
18h 05m
1 stop
DUB8:10 amDublin
Jan 26
DUB9:00 amDublin
43h 00m
2 stops
STL10:00 pmLambert-St Louis
$456
Find similar
United Airlines
Jan 22
STL9:57 amLambert-St Louis
15h 33m
2 stops
DUB7:30 amDublin
Jan 26
DUB9:00 amDublin
43h 00m
2 stops
STL10:00 pmLambert-St Louis
$460
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
42h 07m
2 stops
STL9:07 pmLambert-St Louis
$458
Find similar
Air Canada
Jan 10
STL4:49 pmLambert-St Louis
32h 21m
2 stops
DUB7:10 amDublin
Jan 21
DUB9:00 amDublin
35h 30m
2 stops
STL2:30 pmLambert-St Louis
$462
Find similar
Air Canada
Apr 7
STL6:35 pmLambert-St Louis
31h 40m
2 stops
DUB8:15 amDublin
Apr 16
DUB9:50 amDublin
34h 37m
2 stops
STL2:27 pmLambert-St Louis
$466
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 16, 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

mar. 1/13

11:22 am-7:30 am

1 stop14h 08m

Dublin

mar. 1/20

9:30 am-11:59 pm

1 stop20h 29m

$440

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

jue. 1/22

9:57 am-8:10 am

1 stop16h 13m

Dublin

lun. 1/26

9:00 am-10:00 pm

2 stops43h 00m

$456

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

vie. 3/6

4:05 pm-6:10 am

1 stop32h 05m

Dublin

lun. 3/16

8:00 am-9:07 pm

2 stops42h 07m

$458

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

sáb. 1/10

4:49 pm-7:10 am

2 stops32h 21m

Dublin

mié. 1/21

9:00 am-2:30 pm

2 stops35h 30m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

dom. 3/8

4:50 pm-4:25 pm

1 stop18h 35m

Dublin

dom. 3/15

8:00 am-3:29 pm

1 stop12h 29m

$464

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

mar. 1/13

5:04 pm-7:40 pm

2 stops20h 36m

Dublin

mar. 1/20

10:55 am-10:59 pm

2 stops18h 04m

$465

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

dom. 1/11

3:50 pm-11:00 am

1 stop13h 10m

Dublin

dom. 1/18

9:00 am-3:29 pm

1 stop12h 29m

$469

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

mar. 4/21

10:00 pm-8:35 pm

1 stop16h 35m

Shannon

mar. 5/5

7:40 am-7:30 pm

1 stop17h 50m

$470

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

mar. 4/21

7:03 pm-4:10 pm

2 stops15h 07m

Shannon

mar. 5/5

7:40 am-7:30 pm

1 stop17h 50m

$474

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

mié. 1/14

12:11 pm-4:45 pm

2 stops22h 34m

Shannon

jue. 1/29

7:50 am-6:34 pm

2 stops16h 44m

$696

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 $661.

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 $820 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 10m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 10m
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
1,430 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,531 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,582 reviews
Search British Airways flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,052 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,008 reviews
Search Delta flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
LufthansaPriceFrom $498Free CancellationRating
6.8
7,632 reviews
Search Lufthansa flights
American AirlinesPriceFrom $548Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
Aer LingusPriceFrom $759Free CancellationRating
7.2
1,395 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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1 adult
jue. 1/15
jue. 1/22
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