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Cheap flights from St. Louis to Ireland from $315

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 3/18. 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.
United Airlines Logo
1:11 pm - 8:10 am
STL
-
DUB
12h 59m
1 stop
United Airlines Logo
9:00 am - 8:23 pm
DUB
-
STL
41h 23m
2 stops
$458United Airlines
Wed, Feb 18 - Fri, Feb 27
United Airlines Logo
9:10 am - 9:45 am
STL
-
DUB
18h 35m
1 stop
United Airlines Logo
9:50 am - 10:30 pm
DUB
-
STL
42h 40m
2 stops
$462United Airlines
Wed, Apr 29 - Tue, May 5
British Airways Logo
9:37 am - 9:40 am
STL
-
DUB
18h 03m
2 stops
British Airways Logo
8:40 pm - 5:13 pm
DUB
-
STL
26h 33m
2 stops
$466British Airways
Wed, Feb 25 - Wed, Mar 4
British Airways Logo
11:50 am - 9:50 am
STL
-
DUB
16h 00m
2 stops
British Airways Logo
8:35 pm - 10:52 pm
DUB
-
STL
32h 17m
2 stops
$468British Airways
Sat, Feb 28 - Fri, Mar 6
American Airlines Logo
2:00 pm - 9:10 am
STL
-
DUB
13h 10m
2 stops
American Airlines Logo
11:30 am - 11:02 pm
DUB
-
STL
16h 32m
1 stop
$476American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
11:59 am - 11:10 am
STL
-
ORK
18h 11m
2 stops
American Airlines Logo
11:35 am - 11:58 pm
ORK
-
STL
18h 23m
2 stops
$565American Airlines
Wed, Mar 25 - Sat, Apr 4
Delta Logo
7:20 am - 11:10 am
STL
-
SNN
21h 50m
2 stops
Delta Logo
1:05 pm - 11:38 pm
SNN
-
STL
16h 33m
2 stops
$626Delta
Sun, May 24 - Tue, Jun 2
Delta Logo
12:00 pm - 11:10 am
STL
-
SNN
17h 10m
1 stop
Delta Logo
1:05 pm - 8:50 pm
SNN
-
STL
13h 45m
1 stop
$682Delta
Sun, May 24 - Mon, Jun 8
Air Canada Logo
11:25 am - 11:10 am
STL
-
ORK
18h 45m
3 stops
Air Canada Logo
7:10 am - 9:08 pm
ORK
-
STL
19h 58m
3 stops
$779Air Canada
Wed, Mar 25 - Sat, Apr 4
Air Canada Logo
4:05 pm - 6:50 pm
STL
-
ORK
45h 45m
2 stops
Air Canada Logo
8:30 pm - 3:24 pm
ORK
-
STL
24h 54m
2 stops
$790Air Canada
Fri, Mar 27 - Sat, Apr 4

British Airways flights from St. Louis to Ireland

Our best British Airways deals on St. Louis to Ireland flight tickets
British Airways
Feb 25
STL9:37 amLambert-St Louis
18h 03m
2 stops
DUB9:40 amDublin
Mar 4
DUB8:40 pmDublin
26h 33m
2 stops
STL5:13 pmLambert-St Louis
$466
British Airways
Feb 28
STL11:50 amLambert-St Louis
16h 00m
2 stops
DUB9:50 amDublin
Mar 6
DUB8:35 pmDublin
32h 17m
2 stops
STL10:52 pmLambert-St Louis
$468
British Airways
Feb 27
STL6:00 amLambert-St Louis
22h 00m
2 stops
DUB10:00 amDublin
Mar 3
DUB8:50 amDublin
20h 14m
2 stops
STL11:04 pmLambert-St Louis
$469

Delta flights from St. Louis to Ireland

Our best Delta deals on St. Louis to Ireland flight tickets
Delta
Feb 26
STL6:35 amLambert-St Louis
19h 10m
2 stops
DUB7:45 amDublin
Mar 3
DUB8:50 amDublin
17h 53m
2 stops
STL8:43 pmLambert-St Louis
$488
Delta
Apr 14
STL6:48 amLambert-St Louis
19h 07m
2 stops
DUB7:55 amDublin
Apr 22
DUB5:55 amDublin
16h 47m
2 stops
STL4:42 pmLambert-St Louis
$491
Delta
Apr 4
STL6:32 amLambert-St Louis
19h 23m
2 stops
DUB7:55 amDublin
Apr 11
DUB10:00 amDublin
19h 25m
1 stop
STL11:25 pmLambert-St Louis
$594

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 29, 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

Wed 2/18

1:11 pm-8:10 am

1 stop12h 59m

Dublin

Fri 2/27

9:00 am-8:23 pm

2 stops41h 23m

$458

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 4/29

9:10 am-9:45 am

1 stop18h 35m

Dublin

Tue 5/5

9:50 am-10:30 pm

2 stops42h 40m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/25

9:37 am-9:40 am

2 stops18h 03m

Dublin

Wed 3/4

8:40 pm-5:13 pm

2 stops26h 33m

$466

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 2/28

11:50 am-9:50 am

2 stops16h 00m

Dublin

Fri 3/6

8:35 pm-10:52 pm

2 stops32h 17m

$468

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 3/3

2:00 pm-9:10 am

2 stops13h 10m

Dublin

Tue 3/10

11:30 am-11:02 pm

1 stop16h 32m

$476

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

11:59 am-11:10 am

2 stops18h 11m

Cork

Sat 4/4

11:35 am-11:58 pm

2 stops18h 23m

$565

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 5/24

7:20 am-11:10 am

2 stops21h 50m

Shannon

Tue 6/2

1:05 pm-11:38 pm

2 stops16h 33m

$626

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 5/24

12:00 pm-11:10 am

1 stop17h 10m

Shannon

Mon 6/8

1:05 pm-8:50 pm

1 stop13h 45m

$682

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

11:25 am-11:10 am

3 stops18h 45m

Cork

Sat 4/4

7:10 am-9:08 pm

3 stops19h 58m

$779

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Fri 3/27

4:05 pm-6:50 pm

2 stops45h 45m

Cork

Sat 4/4

8:30 pm-3:24 pm

2 stops24h 54m

$790

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 $790 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 $600 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
1,443 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,666 reviews
Search Air Canada flights
LufthansaPriceFrom $465Free CancellationRating
6.8
7,752 reviews
Search Lufthansa flights
United AirlinesPriceFrom $468Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,099 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,125 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.2
11,199 reviews
Search American Airlines flights
Aer LingusPriceFrom $662Free CancellationRating
7.2
1,442 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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