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Cheap flights from Ireland to St. Louis from $418

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 9/21. 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

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.
Iberia Logo
9:30 am - 9:55 pm
DUB
-
STL
18h 25m
1 stop
Iberia Logo
3:34 pm - 9:45 am
STL
-
DUB
12h 11m
1 stop
$968Iberia
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
1:45 pm - 11:44 pm
DUB
-
STL
15h 59m
2 stops
Multiple Airlines Logo
11:18 am - 6:30 am
STL
-
DUB
13h 12m
1 stop
$981Multiple Airlines
Wed, Jun 24 - Sat, Jul 18
Iberia Logo
1:45 pm - 11:59 pm
DUB
-
STL
16h 14m
1 stop
Iberia Logo
5:19 pm - 11:50 am
STL
-
DUB
12h 31m
1 stop
$982Iberia
Wed, Jun 24 - Sat, Jul 18
American Airlines Logo
9:30 am - 6:04 pm
DUB
-
STL
14h 34m
2 stops
American Airlines Logo
8:43 am - 9:35 am
STL
-
DUB
18h 52m
1 stop
$1,001American Airlines
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
9:40 am - 8:31 pm
DUB
-
STL
16h 51m
2 stops
Multiple Airlines Logo
12:59 pm - 9:55 am
STL
-
DUB
14h 56m
2 stops
$1,002Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
9:40 am - 8:39 pm
DUB
-
STL
16h 59m
2 stops
Multiple Airlines Logo
7:05 pm - 4:50 pm
STL
-
DUB
15h 45m
2 stops
$1,041Multiple Airlines
Wed, Jun 24 - Sat, Jul 18
Iberia Logo
9:30 am - 6:57 pm
DUB
-
STL
15h 27m
1 stop
Iberia Logo
8:07 pm - 11:50 am
STL
-
DUB
9h 43m
1 stop
$1,101Iberia
Sat, Aug 15 - Fri, Sep 4
Iberia Logo
9:30 am - 7:18 pm
DUB
-
STL
15h 48m
1 stop
Iberia Logo
7:56 pm - 11:50 am
STL
-
DUB
9h 54m
1 stop
$1,102Iberia
Mon, Jul 13 - Mon, Jul 27
Iberia Logo
1:45 pm - 11:34 pm
DUB
-
STL
15h 49m
1 stop
Iberia Logo
8:07 pm - 11:50 am
STL
-
DUB
9h 43m
1 stop
$1,103Iberia
Sat, Aug 15 - Fri, Sep 4
Iberia Logo
12:40 pm - 7:53 pm
DUB
-
STL
13h 13m
1 stop
Iberia Logo
2:31 pm - 5:40 pm
STL
-
DUB
21h 09m
2 stops
$1,121Iberia
Mon, Jul 13 - Mon, Jul 27

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British Airways flights from Ireland to St. Louis

Our best British Airways deals on Ireland to St. Louis flight tickets
British Airways
Jul 13
DUB12:00 pmDublin
17h 58m
2 stops
STL11:58 pmLambert-St Louis
Jul 27
STL5:58 pmLambert-St Louis
14h 32m
2 stops
DUB2:30 pmDublin
$1,217
British Airways
Jun 15
DUB8:30 amDublin
16h 30m
2 stops
STL7:00 pmLambert-St Louis
Jun 28
STL9:40 pmLambert-St Louis
12h 05m
1 stop
DUB3:45 pmDublin
$1,501
British Airways
Jun 14
DUB6:30 amDublin
16h 03m
2 stops
STL4:33 pmLambert-St Louis
Jun 27
STL6:12 pmLambert-St Louis
15h 33m
2 stops
DUB3:45 pmDublin
$1,704

Air Canada flights from Ireland to St. Louis

Our best Air Canada deals on Ireland to St. Louis flight tickets
Air Canada
Jun 15
DUB9:50 amDublin
14h 23m
2 stops
STL6:13 pmLambert-St Louis
Jun 28
STL1:13 pmLambert-St Louis
12h 32m
2 stops
DUB7:45 amDublin
$1,234
Air Canada
Aug 15
DUB9:50 amDublin
14h 52m
1 stop
STL6:42 pmLambert-St Louis
Sep 4
STL8:55 amLambert-St Louis
16h 50m
2 stops
DUB7:45 amDublin
$1,238
Air Canada
Aug 15
DUB9:50 amDublin
16h 32m
2 stops
STL8:22 pmLambert-St Louis
Sep 4
STL8:55 amLambert-St Louis
16h 50m
2 stops
DUB7:45 amDublin
$1,246

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 June 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

Sat 9/12

9:30 am-9:55 pm

1 stop18h 25m

Lambert-St Louis

Sat 9/19

3:34 pm-9:45 am

1 stop12h 11m

$968

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 6/24

1:45 pm-11:44 pm

2 stops15h 59m

Lambert-St Louis

Sat 7/18

11:18 am-6:30 am

1 stop13h 12m

$981

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 6/24

1:45 pm-11:59 pm

1 stop16h 14m

Lambert-St Louis

Sat 7/18

5:19 pm-11:50 am

1 stop12h 31m

$982

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/12

9:30 am-6:04 pm

2 stops14h 34m

Lambert-St Louis

Sat 9/19

8:43 am-9:35 am

1 stop18h 52m

$1,001

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/12

9:40 am-8:31 pm

2 stops16h 51m

Lambert-St Louis

Sat 9/19

12:59 pm-9:55 am

2 stops14h 56m

$1,002

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 6/24

9:40 am-8:39 pm

2 stops16h 59m

Lambert-St Louis

Sat 7/18

7:05 pm-4:50 pm

2 stops15h 45m

$1,041
Quickest round-trip

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 8/15

9:30 am-6:57 pm

1 stop15h 27m

Lambert-St Louis

Fri 9/4

8:07 pm-11:50 am

1 stop9h 43m

$1,101

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 7/13

9:30 am-7:18 pm

1 stop15h 48m

Lambert-St Louis

Mon 7/27

7:56 pm-11:50 am

1 stop9h 54m

$1,102

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 8/15

1:45 pm-11:34 pm

1 stop15h 49m

Lambert-St Louis

Fri 9/4

8:07 pm-11:50 am

1 stop9h 43m

$1,103

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 7/13

12:40 pm-7:53 pm

1 stop13h 13m

Lambert-St Louis

Mon 7/27

2:31 pm-5:40 pm

2 stops21h 09m

$1,121

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 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

What is the cheapest month to fly to St. Louis?

In general, November is the cheapest month to fly from Ireland to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of September is another great option to travel to St. Louis, with average flight prices from Ireland averaging around $623.

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

You could potentially save up to 48% 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

16h 51m

Direct flights

None
The fastest flight from Ireland to St. Louis takes 16h 51m
There are no direct flights from Ireland to St. Louis. There are no popular flight routes from Ireland to St. Louis.
Search flight deals

Frequently asked questions about flying from Ireland to St. Louis

  • 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
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Fenton
Clayton
Farmington
Festus
Eureka
Litchfield
Edwardsville
Grafton
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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