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

The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $529. However, be on the lookout for offers from Aer Lingus and Iberia, as they are both options that can get you from Ireland to St. Louis for a low price.

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

The best pricing can be found in the month of February. Prices to St. Louis from Ireland average $932. You can even find prices in February for less than $932, as users have found deals to St. Louis from as low as $765. The month of July appears to be one of the more expensive times to travel to St. Louis from Ireland. Flying in the targeted month can save you up to 12%.

What is the cheapest time of day to fly from IE to STL?

When flying from Ireland to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

$977+ Flights from Ireland to St. Louis

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Ireland to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ireland to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$788 (Scandinavian Airlines)
One-way from	$529 (Kiwi.com)
Popular in	July
Cheapest in	February
Average price	$931

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. 5% potential increase in price ($55 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 April 24, 2025.

Thu 7/248:15 pmDUB - STL

2 stops30h 32mScandinavian Airlines

Mon 8/251:30 pmSTL - DUB

2 stops22h 45mScandinavian Airlines

Deal found 4/24

$788

Fri 5/305:55 amDUB - STL

3 stops35h 50mMultiple Airlines

Sun 6/15:15 pmSTL - DUB

3 stops32h 30mMultiple Airlines

Deal found 4/23

$877

Thu 5/18:55 amDUB - STL

2 stops18h 41mDelta

Wed 5/141:09 pmSTL - DUB

2 stops14h 51mDelta

Deal found 4/23

$889

Thu 5/111:45 amDUB - STL

1 stop12h 27mAmerican Airlines

Wed 5/147:10 amSTL - DUB

1 stop16h 20mAmerican Airlines

Deal found 4/23

$898

Wed 5/1410:00 amDUB - STL

1 stop13h 00mKLM

Sun 6/110:05 amSTL - DUB

1 stop16h 40mKLM

Deal found 4/23

$911

Fri 11/218:40 amDUB - STL

2 stops17h 36mBritish Airways

Sat 11/294:39 pmSTL - DUB

2 stops14h 01mBritish Airways

Deal found 4/23

$913

Fri 10/249:20 amDUB - STL

2 stops20h 38mUnited Airlines

Sun 10/261:00 pmSTL - DUB

1 stop16h 05mUnited Airlines

Deal found 4/22

$971

Sun 6/812:40 pmDUB - STL

1 stop14h 14mIberia

Sun 6/158:05 pmSTL - DUB

1 stop9h 35mIberia

Deal found 4/23

$1,002

Sat 6/79:20 amDUB - STL

1 stop16h 38mAir Canada

Sat 6/147:30 amSTL - DUB

1 stop18h 45mAir Canada

Deal found 4/23

$1,064

Mon 5/124:40 pmDUB - STL

1 stop11h 12mAer Lingus

Wed 5/141:45 pmSTL - DUB

1 stop12h 25mAer Lingus

Deal found 4/23

$1,166

Best flights from Ireland to St. Louis
Discover carefully curated flight deals from Ireland to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2025.

Thu 7/248:15 pmDUB - STL

2 stops30h 32mScandinavian Airlines

Mon 8/251:30 pmSTL - DUB

2 stops22h 45mScandinavian Airlines

Deal found 4/24

$788

Fri 5/305:55 amDUB - STL

3 stops35h 50mMultiple Airlines

Sun 6/15:15 pmSTL - DUB

3 stops32h 30mMultiple Airlines

Deal found 4/23

$877

Wed 5/145:55 amDUB - STL

2 stops15h 05mDelta

Sun 6/110:05 amSTL - DUB

2 stops17h 10mDelta

Deal found 4/23

$889

Tue 5/611:45 amDUB - STL

1 stop15h 41mAmerican Airlines

Mon 5/195:12 amSTL - DUB

1 stop18h 18mAmerican Airlines

Deal found 4/23

$907

Wed 5/1410:00 amDUB - STL

1 stop13h 00mKLM

Sun 6/110:05 amSTL - DUB

1 stop16h 40mKLM

Deal found 4/23

$911

Sun 6/812:40 pmDUB - STL

1 stop14h 14mIberia

Sun 6/158:05 pmSTL - DUB

1 stop9h 35mIberia

Deal found 4/23

$1,002

Sat 6/79:20 amDUB - STL

1 stop16h 38mAir Canada

Sat 6/147:30 amSTL - DUB

1 stop18h 45mAir Canada

Deal found 4/23

$1,064

Mon 5/124:40 pmDUB - STL

1 stop11h 12mAer Lingus

Wed 5/141:45 pmSTL - DUB

1 stop12h 25mAer Lingus

Deal found 4/23

$1,166

Thu 6/2611:15 amDUB - STL

2 stops15h 15mBritish Airways

Mon 8/44:52 pmSTL - DUB

2 stops14h 33mBritish Airways

Deal found 4/24

$2,925

Last-minute flights from Ireland to St. Louis
Discover last-minute flight deals from Ireland to St. Louis. Data last updated April 24, 2025 and is based on user searches.

Thu 5/18:55 amDUB - STL

2 stops18h 41mDelta

Wed 5/141:09 pmSTL - DUB

2 stops14h 51mDelta

Deal found 4/23

$889

Thu 5/111:45 amDUB - STL

1 stop12h 27mAmerican Airlines

Wed 5/147:10 amSTL - DUB

1 stop16h 20mAmerican Airlines

Deal found 4/23

$898

Thu 5/19:20 amDUB - STL

2 stops16h 03mUnited Airlines

Wed 5/145:29 pmSTL - DUB

1 stop10h 16mUnited Airlines

Deal found 4/23

$990

Thu 5/112:45 pmDUB - STL

2 stops15h 27mBritish Airways

Wed 5/147:30 pmSTL - DUB

2 stops15h 45mBritish Airways

Deal found 4/23

$1,035

Thu 5/15:55 amDUB - STL

2 stops16h 52mDelta

Wed 5/147:05 amSTL - DUB

1 stop19h 40mDelta

Deal found 4/23

$889

Mon 5/124:40 pmDUB - STL

1 stop11h 12mAer Lingus

Wed 5/141:45 pmSTL - DUB

1 stop12h 25mAer Lingus

Deal found 4/23

$1,166

Wed 5/1410:00 amDUB - STL

1 stop13h 00mKLM

Sun 6/110:05 amSTL - DUB

1 stop16h 40mKLM

Deal found 4/23

$911

Fri 5/305:55 amDUB - STL

3 stops35h 50mMultiple Airlines

Sun 6/15:15 pmSTL - DUB

3 stops32h 30mMultiple Airlines

Deal found 4/23

$877

One-way flights from Ireland to St. Louis
Search for one-way flight options from Ireland to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 24, 2025.

Thu 9/411:30 amDUB - STL

2 stops30h 54mWestJet

Deal found 4/23

$529

Mon 8/2510:05 pmDUB - STL

2 stops27h 35mMultiple Airlines

Deal found 4/23

$531

Sat 5/1711:35 amDUB - STL

1 stop18h 16mAer Lingus

Deal found 4/23

$647

Sun 6/112:40 pmDUB - STL

1 stop12h 49mIberia

Deal found 4/23

$829

Thu 9/410:55 amDUB - STL

2 stops15h 28mBritish Airways

Deal found 4/23

$831

Cheapflights Fare Finder

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

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 7/24

8:15 pm-8:47 pm

2 stops30h 32m

Lambert-St Louis

Mon 8/25

1:30 pm-6:15 pm

2 stops22h 45m

$788

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 5/30

5:55 am-11:45 am

3 stops35h 50m

Lambert-St Louis

Sun 6/1

5:15 pm-7:45 am

3 stops32h 30m

$877

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 5/14

5:55 am-3:00 pm

2 stops15h 05m

Lambert-St Louis

Sun 6/1

10:05 am-9:15 am

2 stops17h 10m

$889

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 5/6

11:45 am-9:26 pm

1 stop15h 41m

Lambert-St Louis

Mon 5/19

5:12 am-5:30 am

1 stop18h 18m

$907

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 5/14

10:00 am-5:00 pm

1 stop13h 00m

Lambert-St Louis

Sun 6/1

10:05 am-8:45 am

1 stop16h 40m

$911

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sun 6/8

12:40 pm-8:54 pm

1 stop14h 14m

Lambert-St Louis

Sun 6/15

8:05 pm-11:40 am

1 stop9h 35m

$1,002

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 6/7

9:20 am-7:58 pm

1 stop16h 38m

Lambert-St Louis

Sat 6/14

7:30 am-8:15 am

1 stop18h 45m

$1,064

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 5/12

4:40 pm-9:52 pm

1 stop11h 12m

Lambert-St Louis

Wed 5/14

1:45 pm-8:10 am

1 stop12h 25m

$1,166

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 6/26

11:15 am-8:30 pm

2 stops15h 15m

Lambert-St Louis

Mon 8/4

4:52 pm-1:25 pm

2 stops14h 33m

$2,925

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 9/4

11:30 am-12:24 pm

2 stops30h 54m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 14 results

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

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

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

Read through reviews of airlines operating flights from Ireland to St. Louis, such as Delta, KLM and Scandinavian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,920 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Scandinavian Airlines

7.3

Good

1,344 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

WestJet

7.2

Good

2,816 reviews

Delta

8.0

Very good

7,920 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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 WestJet, with whom users have recently found tickets for as low as $529. However, be on the lookout for offers from Aer Lingus and Iberia, 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

Fenton

Maryland Heights

Fairview Heights

Collinsville

Wentzville

Eureka

St. Peters

Festus

Glencoe

Alton

Farmington

Browse thousands of different options on Cheapflights for your next trip

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$529+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ireland to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 April 24, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ireland to St. Louis

Cheapest flights from Ireland to St. LouisExplore 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 April 24, 2025.

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 April 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ireland to St. Louis that are best for you.

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.

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?

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

Read through reviews of airlines operating flights from Ireland to St. Louis, such as Delta, KLM and Scandinavian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

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

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

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

Traveling to a place near Ireland?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ireland to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

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 April 24, 2025.