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Cheap flights from St. Louis to Ireland from $378

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 1/15. 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.
Multiple Airlines Logo
11:22 am - 7:30 am
STL
-
DUB
14h 08m1 stop
Multiple Airlines Logo
10:40 am - 5:43 pm
DUB
-
STL
13h 03m1 stop
$432Multiple Airlines
Tue, Jan 13 - Wed, Jan 21
Multiple Airlines Logo
6:40 pm - 8:10 am
STL
-
DUB
31h 30m1 stop
Multiple Airlines Logo
9:30 am - 11:59 pm
DUB
-
STL
20h 29m1 stop
$433Multiple Airlines
Wed, Feb 4 - Sun, Feb 8
British Airways Logo
10:00 pm - 5:30 pm
STL
-
DUB
13h 30m1 stop
British Airways Logo
10:55 am - 7:30 pm
DUB
-
STL
14h 35m1 stop
$448British Airways
Wed, Apr 22 - Wed, May 6
United Airlines Logo
8:05 am - 8:10 am
STL
-
DUB
18h 05m1 stop
United Airlines Logo
9:00 am - 10:00 pm
DUB
-
STL
43h 00m2 stops
$456United Airlines
Thu, Jan 22 - Mon, Jan 26
British Airways Logo
10:00 pm - 4:20 pm
STL
-
DUB
12h 20m1 stop
British Airways Logo
10:55 am - 7:30 pm
DUB
-
STL
14h 35m1 stop
$457British Airways
Sun, Apr 26 - Wed, May 6
United Airlines Logo
10:07 am - 7:30 am
STL
-
DUB
15h 23m2 stops
United Airlines Logo
9:00 am - 12:29 pm
DUB
-
STL
33h 29m2 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
American Airlines Logo
10:00 pm - 4:10 pm
STL
-
SNN
12h 10m1 stop
American Airlines Logo
7:40 am - 7:30 pm
SNN
-
STL
17h 50m1 stop
$481American Airlines
Tue, Apr 21 - Tue, May 5
American Airlines Logo
6:29 pm - 4:10 pm
STL
-
SNN
15h 41m2 stops
American Airlines Logo
9:15 pm - 7:30 pm
SNN
-
STL
28h 15m1 stop
$485American Airlines
Tue, Apr 21 - Tue, May 5
Air Canada Logo
4:05 pm - 11:30 am
STL
-
SNN
13h 25m2 stops
Air Canada Logo
5:30 pm - 3:29 pm
SNN
-
STL
51h 59m2 stops
$683Air Canada
Fri, Jan 30 - Tue, Feb 3

Austrian Airlines flights from St. Louis to Ireland

Our best Austrian Airlines deals on St. Louis to Ireland flight tickets
Austrian Airlines
Jan 14
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Jan 21
DUB9:30 amDublin
20h 29m
1 stop
STL11:59 pmLambert-St Louis
$441
Find similar
Austrian Airlines
Jan 14
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Jan 29
DUB9:30 amDublin
20h 29m
1 stop
STL11:59 pmLambert-St Louis
$476
Find similar
Austrian Airlines
Jan 13
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Jan 20
DUB9:30 amDublin
20h 29m
1 stop
STL11:59 pmLambert-St Louis
$480
Find similar

British Airways flights from St. Louis to Ireland

Our best British Airways deals on St. Louis to Ireland flight tickets
British Airways
Apr 22
STL10:00 pmLambert-St Louis
13h 30m
1 stop
DUB5:30 pmDublin
May 6
DUB10:55 amDublin
14h 35m
1 stop
STL7:30 pmLambert-St Louis
$448
Find similar
British Airways
Apr 26
STL10:00 pmLambert-St Louis
12h 20m
1 stop
DUB4:20 pmDublin
May 6
DUB10:55 amDublin
14h 35m
1 stop
STL7:30 pmLambert-St Louis
$457
Find similar
British Airways
Apr 26
STL11:14 amLambert-St Louis
16h 26m
2 stops
DUB9:40 amDublin
May 5
DUB8:35 amDublin
17h 28m
2 stops
STL8:03 pmLambert-St Louis
$472
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 December 21, 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

Tue 1/13

11:22 am-7:30 am

1 stop14h 08m

Dublin

Wed 1/21

10:40 am-5:43 pm

1 stop13h 03m

$432

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/4

6:40 pm-8:10 am

1 stop31h 30m

Dublin

Sun 2/8

9:30 am-11:59 pm

1 stop20h 29m

$433

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 4/22

10:00 pm-5:30 pm

1 stop13h 30m

Dublin

Wed 5/6

10:55 am-7:30 pm

1 stop14h 35m

$448

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 1/22

8:05 am-8:10 am

1 stop18h 05m

Dublin

Mon 1/26

9:00 am-10:00 pm

2 stops43h 00m

$456

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 4/26

10:00 pm-4:20 pm

1 stop12h 20m

Dublin

Wed 5/6

10:55 am-7:30 pm

1 stop14h 35m

$457

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-12:29 pm

2 stops33h 29m

$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. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

10:00 pm-4:10 pm

1 stop12h 10m

Shannon

Tue 5/5

7:40 am-7:30 pm

1 stop17h 50m

$481

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

6:29 pm-4:10 pm

2 stops15h 41m

Shannon

Tue 5/5

9:15 pm-7:30 pm

1 stop28h 15m

$485

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 1/30

4:05 pm-11:30 am

2 stops13h 25m

Shannon

Tue 2/3

5:30 pm-3:29 pm

2 stops51h 59m

$683

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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.

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 $814 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 10% 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

9h 34m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 9h 34m
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
10,552 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,602 reviews
Search British Airways flights
LufthansaPriceFrom $465Free CancellationRating
6.8
7,644 reviews
Search Lufthansa flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,055 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,014 reviews
Search Delta flights
American AirlinesPriceFrom $485Free CancellationRating
7.2
11,053 reviews
Search American Airlines flights
United AirlinesPriceFrom $485Free CancellationRating
7.4
9,102 reviews
Search United Airlines flights
Aer LingusPriceFrom $759Free CancellationRating
7.2
1,408 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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Find better results for your trip to Ireland

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