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St. Louis

$424+ Cheap flights from Ireland to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — STL
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Ireland to St. Louis

Keep the following information in mind while searching for Ireland to St. Louis flight deals. Data was last updated September 16, 2025.

Round-trip from

$614
(Scandinavian Airlines)

One-way from

$424
(Kiwi.com)

Popular in

July

Cheapest in

August

Average price

$897
From Ireland to Lambert-St Louis
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One-way flight from Ireland to Lambert-St Louis
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Highest demand for flights based on searches. 3% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ireland to St. Louis

Cheapest flights from Ireland to St. Louis
Explore the most affordable flight options available from Ireland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:30 pmDUB - STL
2 stops38h 33mScandinavian Airlines
Mon 12/811:40 amSTL - DUB
2 stops42h 05mScandinavian Airlines
Deal found 9/15$614
This Scandinavian Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:30 pmDUB - STL
2 stops39h 28mScandinavian Airlines
Mon 12/81:55 pmSTL - DUB
2 stops39h 50mScandinavian Airlines
Deal found 9/16$615
This Scandinavian Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:30 pmDUB - STL
2 stops38h 33mScandinavian Airlines
Sat 12/131:33 pmSTL - DUB
2 stops40h 12mScandinavian Airlines
Deal found 9/13$649
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:30 pmDUB - STL
2 stops41h 11mScandinavian Airlines
Sat 12/131:33 pmSTL - DUB
2 stops40h 12mScandinavian Airlines
Deal found 9/15$650
This Scandinavian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:30 pmDUB - STL
2 stops41h 11mScandinavian Airlines
Thu 12/1111:40 amSTL - DUB
2 stops39h 45mScandinavian Airlines
Deal found 9/15$736
This Scandinavian Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:30 pmDUB - STL
2 stops38h 33mScandinavian Airlines
Mon 12/151:55 pmSTL - DUB
2 stops39h 50mScandinavian Airlines
Deal found 9/14$737
This lastminute.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:10 amDUB - STL
2 stops42h 31mScandinavian Airlines
Sat 11/83:59 pmSTL - DUB
2 stops37h 46mScandinavian Airlines
Deal found 9/14$767
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:30 pmDUB - STL
2 stops31h 16mMultiple Airlines
Wed 12/104:32 pmSTL - DUB
1 stop10h 13mMultiple Airlines
Deal found 9/13$793
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:30 amDUB - STL
2 stops22h 16mMultiple Airlines
Wed 12/104:32 pmSTL - DUB
1 stop10h 13mMultiple Airlines
Deal found 9/13$806

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Ireland to St. Louis that are best for you.

Fly from

Ireland

Fly to

St. Louis

Route

Depart

Return

Price

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 12/4

12:30 pm-11:41 pm

2 stops41h 11m

Lambert-St Louis

Mon 12/8

1:55 pm-11:45 am

2 stops39h 50m

$614

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 12/6

10:10 am-11:41 pm

2 stops43h 31m

Lambert-St Louis

Sat 12/13

1:33 pm-11:45 am

2 stops40h 12m

$649

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 12/4

12:30 pm-9:03 pm

2 stops38h 33m

Lambert-St Louis

Sat 12/13

1:33 pm-11:45 am

2 stops40h 12m

$649

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 12/5

8:35 pm-8:51 pm

2 stops30h 16m

Lambert-St Louis

Sun 12/14

2:09 pm-3:05 pm

2 stops18h 56m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 12/3

8:50 am-8:51 pm

2 stops18h 01m

Lambert-St Louis

Thu 12/11

4:49 pm-2:10 pm

2 stops15h 21m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 12/2

8:40 pm-8:51 pm

2 stops30h 11m

Lambert-St Louis

Sat 12/13

1:59 pm-2:15 pm

2 stops18h 16m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 12/2

8:40 pm-8:51 pm

2 stops30h 11m

Lambert-St Louis

Sun 12/14

2:09 pm-3:05 pm

2 stops18h 56m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 12/5

8:50 am-8:51 pm

2 stops18h 01m

Lambert-St Louis

Thu 12/11

1:59 pm-2:10 pm

2 stops18h 11m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 12/5

8:50 am-8:51 pm

2 stops18h 01m

Lambert-St Louis

Sat 12/13

1:59 pm-2:15 pm

2 stops18h 16m

$895

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 12/15

7:05 am-10:46 pm

3 stops45h 41m

$424

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 11 results
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Best time to book a flight from Ireland to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Ireland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to St. Louis

What is the cheapest month to book a flight from Ireland to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Ireland to St. Louis (average of $311). Flying from Ireland to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Ireland to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Ireland?

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Ireland to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • How long is the flight from Ireland to St. Louis?

    A quick flight from Ireland to St. Louis can take about 41h 11m. Scandinavian Airlines provides one of the quickest options available for as low as $614. The distance from Ireland to St. Louis is about 3909 mi.

  • Can I find deals for flights from Ireland to St. Louis that include hotel bookings?

    Yes. In addition to deals on Ireland to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to St. Louis.

  • Can I find deals for business class flights from Ireland to St. Louis?

    Yes. Cheapflights offers flight deals from Ireland to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Ireland to St. Louis (average of $311). Flying from Ireland to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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