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Cheap flights from Ireland to St. Louis from $543

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to St. Louis departing on 8/30. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Ireland to St. Louis

Recent round-trip flight deals from Ireland to St. Louis

Enter your travel dates to find the best prices.
Aer Lingus Logo
9:40 am - 7:30 pm
DUB
-
STL
15h 50m
1 stop
Aer Lingus Logo
9:35 pm - 2:50 pm
STL
-
DUB
11h 15m
1 stop
$816Aer Lingus
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
9:30 am - 7:30 pm
DUB
-
STL
16h 00m
1 stop
American Airlines Logo
4:30 pm - 11:50 am
STL
-
DUB
13h 20m
1 stop
$826American Airlines
Tue, May 5 - Mon, May 11
American Airlines Logo
12:40 pm - 7:31 pm
DUB
-
STL
12h 51m
1 stop
American Airlines Logo
3:38 pm - 9:45 am
STL
-
DUB
12h 07m
1 stop
$846American Airlines
Wed, May 6 - Sun, May 10
Aer Lingus Logo
8:40 am - 7:30 pm
DUB
-
STL
16h 50m
1 stop
Aer Lingus Logo
9:35 pm - 2:50 pm
STL
-
DUB
11h 15m
1 stop
$852Aer Lingus
Wed, Apr 22 - Wed, Apr 29
Aer Lingus Logo
12:00 pm - 7:30 pm
DUB
-
STL
13h 30m
1 stop
Aer Lingus Logo
9:35 pm - 3:45 pm
STL
-
DUB
12h 10m
1 stop
$865Aer Lingus
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
12:40 pm - 10:59 pm
DUB
-
STL
16h 19m
1 stop
American Airlines Logo
4:30 pm - 11:50 am
STL
-
DUB
13h 20m
1 stop
$866American Airlines
Fri, May 8 - Wed, May 13
American Airlines Logo
9:30 am - 5:21 pm
DUB
-
STL
13h 51m
1 stop
American Airlines Logo
1:29 pm - 6:30 am
STL
-
DUB
11h 01m
1 stop
$871American Airlines
Mon, May 4 - Mon, May 11
American Airlines Logo
9:30 am - 4:41 pm
DUB
-
STL
13h 11m
1 stop
American Airlines Logo
5:21 pm - 11:50 am
STL
-
DUB
12h 29m
1 stop
$904American Airlines
Fri, May 8 - Sat, May 9
American Airlines Logo
9:30 am - 7:30 pm
DUB
-
STL
16h 00m
1 stop
American Airlines Logo
1:16 pm - 6:30 am
STL
-
DUB
11h 14m
1 stop
$911American Airlines
Thu, May 7 - Sat, May 9
United Airlines Logo
11:35 am - 4:39 pm
DUB
-
STL
11h 04m
1 stop
United Airlines Logo
5:28 pm - 9:45 am
STL
-
DUB
10h 17m
1 stop
$915United Airlines
Sat, May 9 - Sun, May 10

Iberia flights from Ireland to St. Louis

Our best Iberia deals on Ireland to St. Louis flight tickets
Iberia
Mar 14
DUB11:30 amDublin
16h 22m
1 stop
STL10:52 pmLambert-St Louis
Mar 28
STL9:35 amLambert-St Louis
18h 10m
1 stop
DUB8:45 amDublin
$910
Iberia
May 6
DUB9:30 amDublin
19h 29m
1 stop
STL10:59 pmLambert-St Louis
May 20
STL8:03 pmLambert-St Louis
9h 47m
1 stop
DUB11:50 amDublin
$968

Delta flights from Ireland to St. Louis

Our best Delta deals on Ireland to St. Louis flight tickets
Delta
Mar 27
DUB9:45 amDublin
18h 40m
1 stop
STL11:25 pmLambert-St Louis
Mar 30
STL3:05 pmLambert-St Louis
10h 50m
1 stop
DUB7:55 amDublin
$1,021
Delta
Mar 27
DUB9:45 amDublin
18h 40m
1 stop
STL11:25 pmLambert-St Louis
Mar 30
STL5:59 pmLambert-St Louis
16h 41m
2 stops
DUB4:40 pmDublin
$1,024
Delta
Apr 13
DUB5:55 amDublin
21h 24m
2 stops
STL9:19 pmLambert-St Louis
Apr 28
STL10:50 amLambert-St Louis
16h 25m
2 stops
DUB9:15 amDublin
$1,038

momondo Fare Finder

 
Customize your flight search to find flights from Ireland to St. Louis 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 March 10, 2026.
Use the filters below to find and compare flights from Ireland to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 4/22

9:40 am-7:30 pm

1 stop15h 50m

Lambert-St Louis

Wed 4/29

9:35 pm-2:50 pm

1 stop11h 15m

$816

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 5/5

9:30 am-7:30 pm

1 stop16h 00m

Lambert-St Louis

Mon 5/11

4:30 pm-11:50 am

1 stop13h 20m

$826

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 5/6

12:40 pm-7:31 pm

1 stop12h 51m

Lambert-St Louis

Sun 5/10

3:38 pm-9:45 am

1 stop12h 07m

$846

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 4/22

8:40 am-7:30 pm

1 stop16h 50m

Lambert-St Louis

Wed 4/29

9:35 pm-2:50 pm

1 stop11h 15m

$852

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 4/21

12:00 pm-7:30 pm

1 stop13h 30m

Lambert-St Louis

Tue 4/28

9:35 pm-3:45 pm

1 stop12h 10m

$865

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 5/8

12:40 pm-10:59 pm

1 stop16h 19m

Lambert-St Louis

Wed 5/13

4:30 pm-11:50 am

1 stop13h 20m

$866

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 5/4

9:30 am-5:21 pm

1 stop13h 51m

Lambert-St Louis

Mon 5/11

1:29 pm-6:30 am

1 stop11h 01m

$871

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 5/8

9:30 am-4:41 pm

1 stop13h 11m

Lambert-St Louis

Sat 5/9

5:21 pm-11:50 am

1 stop12h 29m

$904

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 5/7

9:30 am-7:30 pm

1 stop16h 00m

Lambert-St Louis

Sat 5/9

1:16 pm-6:30 am

1 stop11h 14m

$911
Quickest round-trip

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 5/9

11:35 am-4:39 pm

1 stop11h 04m

Lambert-St Louis

Sun 5/10

5:28 pm-9:45 am

1 stop10h 17m

$915

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to St. Louis from

How to get the cheapest flight ticket from Ireland to St. Louis

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

Can stopping save me money on Ireland to St. Louis flights?

You could potentially save up to 15% on your flight if you consider stops on a Ireland to St. Louis flight.

Cheap Ireland to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to St. Louis

Fastest flight time

15h 31m

Direct flights

None
The fastest flight from Ireland to St. Louis takes 15h 31m
There are no direct flights from Ireland to St. Louis. There are no popular flight routes from Ireland to St. Louis.
Search flight deals

  • When did momondo last update prices for flights from Ireland to Lambert-St Louis Airport?

    Prices for flights from Ireland to Lambert-St Louis Airport were last updated today.

  • How old do you have to be to fly from Ireland to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ireland to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Fenton
Alton
Wentzville
Farmington
Edwardsville
Festus
Clayton
Eureka
Litchfield
Glencoe
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Ireland to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ireland to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Ireland to St. Louis with flexible booking policies on momondo?

momondo does allow users to show only those flights to St. Louis from Ireland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ireland to St. Louis?

Once you have performed a search for Ireland to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ireland to St. Louis right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ireland to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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