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St. Louis

$400+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — STL
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
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 June 16, 2025.

Round-trip from

$701
(Scandinavian Airlines)

One-way from

$400
(Kiwi.com)

Popular in

May

Cheapest in

August

Average price

$991
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. 6% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 16, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 6/14. 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.
Tue 7/228:15 pmDUB - STL
2 stops33h 38mScandinavian Airlines
Mon 8/253:42 pmSTL - DUB
2 stops38h 08mScandinavian Airlines
Deal found 6/14$701
This Lufthansa deal was found by Cheapflights users on 6/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:10 amDUB - STL
1 stop14h 45mMultiple Airlines
Sat 11/2911:49 amSTL - DUB
1 stop13h 11mMultiple Airlines
Deal found 6/16$852
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/219:00 amDUB - STL
1 stop12h 26mUnited Airlines
Sat 11/293:15 pmSTL - DUB
2 stops12h 50mUnited Airlines
Deal found 6/14$853
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:55 amDUB - STL
2 stops16h 56mDelta
Sat 10/44:40 pmSTL - DUB
2 stops16h 20mDelta
Deal found 6/14$868
This KLM deal was found by Cheapflights users on 6/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2011:00 amDUB - STL
1 stop13h 02mKLM
Sat 10/43:30 pmSTL - DUB
1 stop11h 15mKLM
Deal found 6/16$881
This Travelis deal was found by Cheapflights users on 6/14. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/291:15 pmDUB - STL
2 stops16h 05mAir France
Tue 8/56:04 pmSTL - DUB
2 stops14h 56mAir France
Deal found 6/14$947
This Gotogate deal was found by Cheapflights users on 6/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/49:20 amDUB - STL
2 stops33h 07mAir Canada
Sun 8/171:30 pmSTL - DUB
1 stop12h 15mAir Canada
Deal found 6/16$955
This lol.travel deal was found by Cheapflights users on 6/14. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/189:30 amDUB - STL
1 stop16h 54mIberia
Fri 7/255:27 pmSTL - DUB
1 stop34h 18mIberia
Deal found 6/14$969

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 June 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

Tue 7/22

8:15 pm-11:53 pm

2 stops33h 38m

Lambert-St Louis

Mon 8/25

3:42 pm-11:50 am

2 stops38h 08m

$701

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 11/21

5:10 am-1:55 pm

1 stop14h 45m

Lambert-St Louis

Sat 11/29

11:49 am-7:00 am

1 stop13h 11m

$852

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 11/21

9:00 am-3:26 pm

1 stop12h 26m

Lambert-St Louis

Sat 11/29

3:15 pm-10:05 am

2 stops12h 50m

$853

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/20

5:55 am-4:51 pm

2 stops16h 56m

Lambert-St Louis

Sat 10/4

4:40 pm-3:00 pm

2 stops16h 20m

$868

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 9/20

11:00 am-6:02 pm

1 stop13h 02m

Lambert-St Louis

Sat 10/4

3:30 pm-8:45 am

1 stop11h 15m

$881

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 7/29

1:15 pm-11:20 pm

2 stops16h 05m

Lambert-St Louis

Tue 8/5

6:04 pm-3:00 pm

2 stops14h 56m

$947

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 8/4

9:20 am-12:27 pm

2 stops33h 07m

Lambert-St Louis

Sun 8/17

1:30 pm-7:45 am

1 stop12h 15m

$955

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 7/18

9:30 am-8:24 pm

1 stop16h 54m

Lambert-St Louis

Fri 7/25

5:27 pm-9:45 am

1 stop34h 18m

$969

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 10/22

11:30 am-6:41 pm

3 stops37h 11m

$400

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 7/14

9:30 am-8:24 pm

1 stop16h 54m

$785

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 14 results
1
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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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated June 16, 2025.
Read through reviews of airlines operating flights from Ireland to St. Louis, such as Delta, KLM and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,363 reviews
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,466 reviews
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,801 reviews
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,388 reviews
Delta
8.0
Very good
7,963 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines to fly from Ireland to St. Louis one-way?

    The cheapest airline one-way is Iberia, with whom users have recently found tickets for as low as $785. However, be on the lookout for offers from American Airlines and WestJet, as they are both options that can get you from Ireland to St. Louis for a low price.

  • 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 Ireland?

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

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