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Cheap flights from St. Louis to Ireland from $269

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 2/27. 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
6:30 am - 9:45 am
STL
-
DUB
21h 15m
1 stop
United Airlines Logo
9:50 am - 12:06 pm
DUB
-
STL
32h 16m
1 stop
$460United Airlines
Wed, Apr 22 - Tue, May 5
Air Canada Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Air Canada Logo
9:20 am - 12:20 pm
DUB
-
STL
33h 00m
2 stops
$463Air Canada
Mon, Aug 10 - Wed, Aug 19
United Airlines Logo
6:30 am - 9:45 am
STL
-
DUB
21h 15m
1 stop
United Airlines Logo
9:50 am - 10:28 pm
DUB
-
STL
42h 38m
2 stops
$464United Airlines
Tue, Apr 21 - Tue, Apr 28
Air Canada Logo
6:00 am - 7:45 am
STL
-
DUB
19h 45m
2 stops
Air Canada Logo
9:20 am - 12:20 pm
DUB
-
STL
33h 00m
2 stops
$468Air Canada
Mon, Aug 10 - Wed, Aug 19
United Airlines Logo
11:15 am - 7:30 am
STL
-
DUB
14h 15m
2 stops
United Airlines Logo
9:50 am - 10:28 pm
DUB
-
STL
42h 38m
2 stops
$469United Airlines
Tue, Apr 21 - Tue, Apr 28
British Airways Logo
8:03 pm - 6:50 pm
STL
-
DUB
16h 47m
2 stops
British Airways Logo
8:35 am - 7:30 pm
DUB
-
STL
16h 55m
1 stop
$470British Airways
Tue, Apr 14 - Wed, Apr 22
Lufthansa Logo
1:13 pm - 4:30 pm
STL
-
ORK
21h 17m
2 stops
Lufthansa Logo
5:05 pm - 1:25 pm
ORK
-
STL
26h 20m
1 stop
$570Lufthansa
Wed, Aug 5 - Thu, Aug 20
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
ORK
19h 00m
1 stop
Lufthansa Logo
5:05 pm - 1:25 pm
ORK
-
STL
26h 20m
1 stop
$571Lufthansa
Wed, Aug 5 - Thu, Aug 20
American Airlines Logo
11:59 am - 6:20 am
STL
-
SNN
13h 21m
1 stop
American Airlines Logo
2:45 pm - 11:29 am
SNN
-
STL
25h 44m
1 stop
$696American Airlines
Wed, Mar 18 - Wed, Mar 25
Delta Logo
10:50 am - 2:40 pm
STL
-
ORK
21h 50m
2 stops
Delta Logo
6:15 am - 11:59 pm
ORK
-
STL
23h 44m
2 stops
$711Delta
Tue, May 5 - Thu, May 21

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Apr 22
STL6:30 amLambert-St Louis
21h 15m
1 stop
DUB9:45 amDublin
May 5
DUB9:50 amDublin
32h 16m
1 stop
STL12:06 pmLambert-St Louis
$460
United Airlines
Aug 11
STL8:25 amLambert-St Louis
20h 15m
1 stop
DUB10:40 amDublin
Aug 19
DUB9:20 amDublin
33h 00m
2 stops
STL12:20 pmLambert-St Louis
$464
United Airlines
Apr 8
STL7:45 amLambert-St Louis
17h 35m
2 stops
DUB7:20 amDublin
Apr 15
DUB9:50 amDublin
42h 38m
2 stops
STL10:28 pmLambert-St Louis
$469

Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets
Aer Lingus
Feb 28
STL6:36 pmLambert-St Louis
28h 34m
1 stop
DUB5:10 amDublin
Mar 6
DUB4:40 pmDublin
12h 55m
1 stop
STL11:35 pmLambert-St Louis
$672
Aer Lingus
Mar 2
STL9:37 amLambert-St Louis
18h 38m
2 stops
DUB10:15 amDublin
Mar 5
DUB4:40 pmDublin
13h 08m
1 stop
STL11:48 pmLambert-St Louis
$890
Aer Lingus
Mar 10
STL2:37 pmLambert-St Louis
15h 33m
2 stops
ORK11:10 amCork
Mar 11
ORK5:35 pmCork
34h 27m
2 stops
STL11:02 pmLambert-St Louis
$1,444

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 19, 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 4/22

6:30 am-9:45 am

1 stop21h 15m

Dublin

Tue 5/5

9:50 am-12:06 pm

1 stop32h 16m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/10

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Wed 8/19

9:20 am-12:20 pm

2 stops33h 00m

$463

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 4/21

6:30 am-9:45 am

1 stop21h 15m

Dublin

Tue 4/28

9:50 am-10:28 pm

2 stops42h 38m

$464

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/10

6:00 am-7:45 am

2 stops19h 45m

Dublin

Wed 8/19

9:20 am-12:20 pm

2 stops33h 00m

$468

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 4/21

11:15 am-7:30 am

2 stops14h 15m

Dublin

Tue 4/28

9:50 am-10:28 pm

2 stops42h 38m

$469

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 4/14

8:03 pm-6:50 pm

2 stops16h 47m

Dublin

Wed 4/22

8:35 am-7:30 pm

1 stop16h 55m

$470

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/5

1:13 pm-4:30 pm

2 stops21h 17m

Cork

Thu 8/20

5:05 pm-1:25 pm

1 stop26h 20m

$570

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/5

3:30 pm-4:30 pm

1 stop19h 00m

Cork

Thu 8/20

5:05 pm-1:25 pm

1 stop26h 20m

$571

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/18

11:59 am-6:20 am

1 stop13h 21m

Shannon

Wed 3/25

2:45 pm-11:29 am

1 stop25h 44m

$696

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 5/5

10:50 am-2:40 pm

2 stops21h 50m

Cork

Thu 5/21

6:15 am-11:59 pm

2 stops23h 44m

$711

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 $741 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 36% 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

11h 55m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 11h 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
1,459 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,752 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,789 reviews
Search Lufthansa flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,732 reviews
Search Air Canada flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,117 reviews
Search Iberia flights
United AirlinesPriceFrom $468Free CancellationRating
7.4
9,323 reviews
Search United Airlines flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,213 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.2
11,313 reviews
Search American Airlines flights
Aer LingusPriceFrom $662Free CancellationRating
7.2
1,455 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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Find better results for your trip to Ireland

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