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Cheap flights from St. Louis to Ireland from $280

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 3/4. 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.
United Airlines Logo
8:15 pm - 9:45 am
STL
-
DUB
31h 30m
1 stop
United Airlines Logo
9:50 am - 10:28 pm
DUB
-
STL
42h 38m
2 stops
$464United Airlines
Mon, Apr 20 - Tue, Apr 28
United Airlines Logo
7:30 am - 8:15 am
STL
-
DUB
18h 45m
1 stop
United Airlines Logo
9:50 am - 10:30 pm
DUB
-
STL
42h 40m
2 stops
$468United Airlines
Wed, May 6 - Tue, May 12
United Airlines Logo
9:10 am - 7:30 am
STL
-
DUB
16h 20m
2 stops
United Airlines Logo
9:50 am - 10:28 pm
DUB
-
STL
42h 38m
2 stops
$469United Airlines
Mon, Apr 20 - Tue, Apr 28
United Airlines Logo
1:11 pm - 8:10 am
STL
-
DUB
12h 59m
1 stop
United Airlines Logo
9:00 am - 3:29 pm
DUB
-
STL
12h 29m
1 stop
$471United Airlines
Sat, Feb 21 - Sun, Mar 1
Air Canada Logo
4:05 pm - 4:45 pm
STL
-
SNN
42h 40m
2 stops
Air Canada Logo
7:50 am - 3:29 pm
SNN
-
STL
37h 39m
2 stops
$688Air Canada
Wed, Feb 25 - Sun, Mar 1
Air Canada Logo
4:05 pm - 4:45 pm
STL
-
SNN
18h 40m
2 stops
Air Canada Logo
7:50 am - 3:29 pm
SNN
-
STL
37h 39m
2 stops
$689Air Canada
Wed, Feb 25 - Sun, Mar 1
Delta Logo
10:50 am - 2:40 pm
STL
-
ORK
21h 50m
2 stops
Delta Logo
10:50 am - 11:59 pm
ORK
-
STL
19h 09m
2 stops
$711Delta
Tue, May 5 - Thu, May 21
KLM Logo
6:59 pm - 4:45 pm
STL
-
ORK
16h 46m
2 stops
KLM Logo
6:15 am - 9:06 pm
ORK
-
STL
20h 51m
2 stops
$736KLM
Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
2:29 pm - 11:30 am
STL
-
SNN
16h 01m
2 stops
American Airlines Logo
1:45 pm - 10:09 am
SNN
-
STL
26h 24m
1 stop
$763American Airlines
Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
11:59 am - 6:20 am
STL
-
SNN
13h 21m
1 stop
American Airlines Logo
1:45 pm - 10:09 am
SNN
-
STL
26h 24m
1 stop
$772American Airlines
Wed, Mar 25 - 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
Apr 14
STL2:33 pmLambert-St Louis
13h 07m
2 stops
DUB9:40 amDublin
Apr 22
DUB8:35 amDublin
16h 55m
1 stop
STL7:30 pmLambert-St Louis
$472
British Airways
Apr 14
STL2:33 pmLambert-St Louis
15h 32m
2 stops
DUB12:05 pmDublin
Apr 22
DUB8:30 pmDublin
26h 51m
2 stops
STL5:21 pmLambert-St Louis
$474
British Airways
Apr 14
STL2:33 pmLambert-St Louis
13h 07m
2 stops
DUB9:40 amDublin
Apr 22
DUB8:30 pmDublin
26h 52m
2 stops
STL5:22 pmLambert-St Louis
$475

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Apr 20
STL8:15 pmLambert-St Louis
31h 30m
1 stop
DUB9:45 amDublin
Apr 28
DUB9:50 amDublin
42h 38m
2 stops
STL10:28 pmLambert-St Louis
$464
United Airlines
May 6
STL7:30 amLambert-St Louis
18h 45m
1 stop
DUB8:15 amDublin
May 12
DUB9:50 amDublin
42h 40m
2 stops
STL10:30 pmLambert-St Louis
$468
United Airlines
Apr 20
STL9:10 amLambert-St Louis
16h 20m
2 stops
DUB7:30 amDublin
Apr 28
DUB9:50 amDublin
42h 38m
2 stops
STL10:28 pmLambert-St Louis
$469

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 February 14, 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

Mon 4/20

8:15 pm-9:45 am

1 stop31h 30m

Dublin

Tue 4/28

9:50 am-10:28 pm

2 stops42h 38m

$464

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 5/6

7:30 am-8:15 am

1 stop18h 45m

Dublin

Tue 5/12

9:50 am-10:30 pm

2 stops42h 40m

$468

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 4/20

9:10 am-7:30 am

2 stops16h 20m

Dublin

Tue 4/28

9:50 am-10:28 pm

2 stops42h 38m

$469

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 2/21

1:11 pm-8:10 am

1 stop12h 59m

Dublin

Sun 3/1

9:00 am-3:29 pm

1 stop12h 29m

$471

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 2/25

4:05 pm-4:45 pm

2 stops42h 40m

Shannon

Sun 3/1

7:50 am-3:29 pm

2 stops37h 39m

$688

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 2/25

4:05 pm-4:45 pm

2 stops18h 40m

Shannon

Sun 3/1

7:50 am-3:29 pm

2 stops37h 39m

$689

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 5/5

10:50 am-2:40 pm

2 stops21h 50m

Cork

Thu 5/21

10:50 am-11:59 pm

2 stops19h 09m

$711

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

6:59 pm-4:45 pm

2 stops16h 46m

Cork

Sat 4/4

6:15 am-9:06 pm

2 stops20h 51m

$736

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

2:29 pm-11:30 am

2 stops16h 01m

Shannon

Sat 4/4

1:45 pm-10:09 am

1 stop26h 24m

$763

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

11:59 am-6:20 am

1 stop13h 21m

Shannon

Sat 4/4

1:45 pm-10:09 am

1 stop26h 24m

$772

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, January 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 $523. If you aren’t able to travel to Ireland during the month of January, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $557.

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 $740 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 $576 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 51m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 51m
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
1,454 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,739 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,785 reviews
Search Lufthansa flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,717 reviews
Search Air Canada flights
United AirlinesPriceFrom $468Free CancellationRating
7.4
9,293 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,115 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,200 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.2
11,292 reviews
Search American Airlines flights
Aer LingusPriceFrom $662Free CancellationRating
7.2
1,451 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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