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St. Louis

$547+ 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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — STL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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 5/16:50 am
DUB
-
STL
2 stops22h 29m
Multiple Airlines
Sat 5/98:53 am
STL
-
DUB
1 stop14h 17m
Multiple Airlines
Deal found 1/28$840
This Finnair deal was found by Cheapflights users on 1/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:30 am
DUB
-
STL
1 stop16h 00m
Finnair
Wed 5/204:46 pm
STL
-
DUB
1 stop13h 04m
Finnair
Deal found 1/27$845
This Finnair deal was found by Cheapflights users on 1/28. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:30 am
DUB
-
STL
1 stop16h 00m
Finnair
Sat 5/94:46 pm
STL
-
DUB
1 stop13h 04m
Finnair
Deal found 1/28$849
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2711:30 am
DUB
-
STL
1 stop17h 22m
American Airlines
Tue 3/32:21 pm
STL
-
DUB
2 stops20h 39m
American Airlines
Deal found 1/26$889
This TravelUp deal was found by Cheapflights users on 1/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2111:30 am
DUB
-
STL
2 stops15h 42m
Multiple Airlines
Sat 2/281:30 pm
STL
-
DUB
2 stops14h 20m
Multiple Airlines
Deal found 1/27$897
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:30 am
DUB
-
STL
2 stops16h 21m
American Airlines
Wed 2/182:00 pm
STL
-
DUB
1 stop12h 40m
American Airlines
Deal found 1/27$899
This Iberia deal was found by Cheapflights users on 1/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/1311:30 am
DUB
-
STL
1 stop16h 22m
Iberia
Fri 3/202:00 pm
STL
-
DUB
1 stop13h 40m
Iberia
Deal found 1/27$926

Find 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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$840
(Kiwi.com)

One-way from

$547
(Kiwi.com)

Popular in

January

Cheapest in

August

Average price

$1,217
Provider with most accurate pricing for Dublin-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Lambert-St Louis flights.
Search Deals
From Ireland to Lambert-St Louis
Search Deals
One-way flight from Ireland to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
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

Wed 5/6

9:30 am-7:30 pm

1 stop16h 00m

Lambert-St Louis

Wed 5/20

4:46 pm-11:50 am

1 stop13h 04m

$845

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 5/1

9:30 am-7:30 pm

1 stop16h 00m

Lambert-St Louis

Sat 5/9

4:46 pm-11:50 am

1 stop13h 04m

$849

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 2/27

11:30 am-11:35 pm

2 stops18h 05m

Lambert-St Louis

Tue 3/3

2:21 pm-5:00 pm

2 stops20h 39m

$889

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 5/4

9:30 am-7:30 pm

1 stop16h 00m

Lambert-St Louis

Mon 5/11

4:46 pm-11:50 am

1 stop13h 04m

$894

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 2/21

11:30 am-9:12 pm

2 stops15h 42m

Lambert-St Louis

Sat 2/28

1:30 pm-9:50 am

2 stops14h 20m

$897

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 3/13

11:30 am-10:52 pm

1 stop16h 22m

Lambert-St Louis

Fri 3/20

2:00 pm-8:40 am

1 stop13h 40m

$926

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 3/13

11:30 am-9:11 pm

2 stops14h 41m

Lambert-St Louis

Fri 3/20

2:00 pm-8:40 am

1 stop13h 40m

$940

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 2/21

8:50 am-8:43 pm

2 stops17h 53m

Lambert-St Louis

Sat 2/28

11:55 am-7:45 am

1 stop13h 50m

$963

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 2/27

9:00 am-3:29 pm

1 stop12h 29m

Lambert-St Louis

Tue 3/3

1:11 pm-8:10 am

1 stop12h 59m

$974

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 5/23

9:40 am-8:31 pm

2 stops16h 51m

$547

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 15 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, September is the cheapest month in which you can book a flight from Ireland to St. Louis (average of $628). Flying from Ireland to St. Louis in January is currently the most expensive (average of $1,117). 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 16h. Finnair provides one of the quickest options available for as low as $845. The distance from Ireland to St. Louis is about 3909 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, September is the cheapest month in which you can book a flight from Ireland to St. Louis (average of $628). Flying from Ireland to St. Louis in January is currently the most expensive (average of $1,117). 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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Ireland to St. Louis

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