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

The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $411. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from St. Louis to Ireland for a low price.

What are the most popular routes from St. Louis to Ireland?

While some choose either Lambert-St Louis - Shannon or Lambert-St Louis - Cork, Lambert-St Louis - Dublin is the most popular route from St. Louis to Ireland.

What are the most popular airlines that fly from St. Louis to Ireland?

Before booking your flight from St. Louis to Ireland check out the most popular airlines for this route: American Airlines, Air Canada or British Airways.

How far in advance should I book a flight from St. Louis to Ireland?

Travelers have found it’s best to book a flight 25 days in advance to save up to 56% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 25 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to Ireland 1-2 weeks in advance for as low as $1,046, or $1,119 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, November can be a great choice for travel to Ireland. Flights to Ireland from St. Louis in November are about $914 on average during November, but can be found for as low as $461.

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

For a flight from St. Louis to Ireland, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

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

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

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

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

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

$808+ Flights from St. Louis to Ireland

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Cheap flight deals from St. Louis to Ireland

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$625 (United Airlines)
One-way from	$411 (American Airlines)
Popular in	June
Cheapest in	November
Average price	$934

Provider with most accurate pricing for Lambert-St Louis-Dublin flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Dublin flights.

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From Lambert-St Louis to Ireland

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One-way flight from Lambert-St Louis to Ireland

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Highest demand for flights based on searches. 21% potential increase in price ($249 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Find flight deals from St. Louis to Ireland

Cheapest flights from St. Louis to Ireland
Explore the most affordable flight options available from St. Louis to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Wed 10/291:54 pmSTL - DUB

1 stop12h 21mIberia

Mon 11/32:05 pmDUB - STL

1 stop14h 24mIberia

Deal found 4/28

$597

Fri 8/11:30 pmSTL - DUB

1 stop12h 15mUnited Airlines

Fri 8/229:50 amDUB - STL

1 stop15h 50mUnited Airlines

Deal found 4/28

$606

Wed 10/293:30 pmSTL - DUB

1 stop11h 15mKLM

Mon 11/39:45 amDUB - STL

1 stop12h 13mKLM

Deal found 4/28

$622

Wed 8/1310:00 amSTL - SNN

1 stop15h 30mUnited Airlines

Sat 8/239:30 amSNN - STL

1 stop18h 02mUnited Airlines

Deal found 4/29

$625

Wed 10/293:30 pmSTL - DUB

1 stop11h 15mAir France

Mon 11/311:30 amDUB - STL

2 stops15h 19mAir France

Deal found 4/28

$626

Sun 11/24:15 pmSTL - DUB

2 stops19h 35mMultiple Airlines

Sun 11/165:00 amDUB - STL

2 stops16h 26mMultiple Airlines

Deal found 4/29

$640

Fri 8/151:30 pmSTL - DUB

1 stop12h 15mAir Canada

Mon 8/259:20 amDUB - STL

1 stop16h 40mAir Canada

Deal found 4/28

$650

Wed 5/283:40 pmSTL - SNN

2 stops13h 30mMultiple Airlines

Wed 6/181:05 pmSNN - STL

2 stops16h 31mMultiple Airlines

Deal found 4/28

$710

Fri 8/156:06 amSTL - DUB

2 stops28h 14mBritish Airways

Sun 8/2410:55 amDUB - STL

2 stops18h 56mBritish Airways

Deal found 4/28

$726

Sun 8/36:00 amSTL - DUB

1 stop21h 15mDelta

Sun 8/101:15 pmDUB - STL

1 stop25h 26mDelta

Deal found 4/29

$754

Tue 7/294:45 pmSTL - ORK

2 stops16h 30mAmerican Airlines

Mon 8/117:20 amORK - STL

2 stops18h 59mAmerican Airlines

Deal found 4/29

$758

Fri 8/153:30 pmSTL - DUB

1 stop19h 25mLufthansa

Sun 8/245:55 amDUB - STL

2 stops15h 49mLufthansa

Deal found 4/28

$761

Best flights from St. Louis to Ireland
Discover carefully curated flight deals from St. Louis to Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2025.

Wed 8/1310:00 amSTL - SNN

1 stop15h 30mUnited Airlines

Sat 8/239:30 amSNN - STL

1 stop18h 02mUnited Airlines

Deal found 4/29

$625

Tue 5/271:59 pmSTL - SNN

2 stops15h 21mAmerican Airlines

Wed 6/187:40 amSNN - STL

2 stops18h 50mAmerican Airlines

Deal found 4/29

$692

Wed 5/283:40 pmSTL - SNN

2 stops13h 30mMultiple Airlines

Wed 6/181:05 pmSNN - STL

2 stops16h 31mMultiple Airlines

Deal found 4/28

$710

Sun 7/279:15 amSTL - DUB

2 stops16h 30mAir Canada

Sat 8/99:50 amDUB - STL

2 stops40h 10mAir Canada

Deal found 4/29

$733

Wed 5/286:45 amSTL - DUB

2 stops19h 10mDelta

Wed 6/410:00 amDUB - STL

2 stops16h 49mDelta

Deal found 4/28

$800

Thu 6/1210:48 amSTL - SNN

2 stops18h 22mKLM

Thu 6/191:05 pmSNN - STL

2 stops16h 46mKLM

Deal found 4/28

$840

Fri 7/412:28 pmSTL - DUB

1 stop15h 17mIberia

Wed 7/161:45 pmDUB - STL

1 stop16h 04mIberia

Deal found 4/29

$855

Mon 5/54:15 pmSTL - DUB

1 stop12h 25mAer Lingus

Sun 5/184:40 pmDUB - STL

1 stop13h 11mAer Lingus

Deal found 4/28

$922

Fri 5/2311:32 amSTL - DUB

1 stop14h 23mAir France

Sat 6/71:15 pmDUB - STL

2 stops14h 16mAir France

Deal found 4/28

$970

Mon 7/214:52 pmSTL - ORK

2 stops20h 58mBritish Airways

Fri 8/111:45 amORK - STL

2 stops17h 12mBritish Airways

Deal found 4/29

$973

Fri 7/185:30 pmSTL - DUB

2 stops19h 45mLufthansa

Sun 7/275:45 pmDUB - STL

2 stops28h 02mLufthansa

Deal found 4/27

$994

Sun 7/271:30 pmSTL - DUB

1 stop12h 15mUnited Airlines

Sat 8/99:20 amDUB - STL

1 stop16h 40mUnited Airlines

Deal found 4/29

$720

Last-minute flights from St. Louis to Ireland
Discover last-minute flight deals from St. Louis to Ireland. Data last updated April 29, 2025 and is based on user searches.

Mon 5/54:15 pmSTL - DUB

1 stop12h 25mAer Lingus

Sun 5/184:40 pmDUB - STL

1 stop13h 11mAer Lingus

Deal found 4/28

$922

Mon 5/56:30 amSTL - DUB

1 stop21h 15mUnited Airlines

Sun 5/189:20 amDUB - STL

2 stops37h 47mUnited Airlines

Deal found 4/28

$999

Thu 5/1511:32 amSTL - DUB

1 stop14h 23mKLM

Thu 5/2210:00 amDUB - STL

1 stop12h 47mKLM

Deal found 4/28

$856

Fri 5/167:30 pmSTL - SNN

2 stops38h 35mBritish Airways

Sat 6/75:30 pmSNN - STL

2 stops33h 00mBritish Airways

Deal found 4/28

$1,013

Fri 5/167:30 pmSTL - SNN

2 stops14h 20mAmerican Airlines

Sat 6/77:40 amSNN - STL

2 stops19h 05mAmerican Airlines

Deal found 4/29

$1,038

Fri 5/2311:32 amSTL - DUB

1 stop14h 23mAir France

Sat 6/71:15 pmDUB - STL

2 stops14h 16mAir France

Deal found 4/28

$970

Wed 5/281:09 pmSTL - SNN

2 stops16h 01mMultiple Airlines

Wed 6/181:05 pmSNN - STL

2 stops16h 17mMultiple Airlines

Deal found 4/29

$710

Wed 5/281:10 pmSTL - DUB

1 stop14h 35mUnited Airlines

Wed 6/49:50 amDUB - STL

2 stops32h 30mUnited Airlines

Deal found 4/28

$768

Wed 5/288:15 amSTL - DUB

1 stop16h 55mMultiple Airlines

Wed 6/49:50 amDUB - STL

2 stops16h 08mMultiple Airlines

Deal found 4/28

$781

Wed 5/289:50 amSTL - DUB

2 stops16h 25mAir Canada

Wed 6/49:50 amDUB - STL

2 stops16h 08mAir Canada

Deal found 4/28

$783

Wed 5/286:45 amSTL - DUB

2 stops19h 10mDelta

Wed 6/410:00 amDUB - STL

2 stops16h 49mDelta

Deal found 4/28

$800

Wed 5/288:10 amSTL - SNN

1 stop17h 20mUnited Airlines

Wed 6/189:30 amSNN - STL

1 stop14h 30mUnited Airlines

Deal found 4/28

$855

One-way flights from St. Louis to Ireland
Search for one-way flight options from St. Louis to Ireland. Find affordable one-way fares based on user searches. Data last updated April 29, 2025.

Tue 5/132:20 pmSTL - SNN

2 stops15h 00mAmerican Airlines

Deal found 4/29

$411

Wed 7/301:30 pmSTL - DUB

1 stop12h 15mAir Canada

Deal found 4/29

$428

Tue 5/138:30 amSTL - SNN

2 stops19h 45mUnited Airlines

Deal found 4/29

$433

Wed 7/3010:30 amSTL - DUB

2 stops15h 25mDelta

Deal found 4/29

$433

Sun 5/46:00 pmSTL - DUB

1 stop29h 10mAer Lingus

Deal found 4/29

$478

Wed 5/147:10 amSTL - DUB

1 stop16h 20mAmerican Airlines

Deal found 4/29

$558

Mon 6/910:48 amSTL - SNN

2 stops18h 22mKLM

Deal found 4/29

$638

Tue 5/134:15 pmSTL - SNN

3 stops35h 50mMultiple Airlines

Deal found 4/29

$991

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 5/28

3:40 pm-11:10 am

2 stops13h 30m

Shannon

Wed 6/18

1:05 pm-11:36 pm

2 stops16h 31m

$710

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 7/27

1:30 pm-7:45 am

1 stop12h 15m

Dublin

Sat 8/9

9:20 am-8:00 pm

1 stop16h 40m

$720

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 7/21

10:00 am-7:30 am

1 stop15h 30m

Shannon

Fri 8/1

9:30 am-10:45 pm

1 stop19h 15m

$723

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 7/27

9:15 am-7:45 am

2 stops16h 30m

Dublin

Sat 8/9

9:50 am-8:00 pm

2 stops40h 10m

$733

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 5/28

8:15 am-7:10 am

1 stop16h 55m

Dublin

Wed 6/4

9:50 am-7:58 pm

2 stops16h 08m

$781

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 5/28

6:45 am-7:55 am

2 stops19h 10m

Dublin

Wed 6/4

10:00 am-8:49 pm

2 stops16h 49m

$800

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 6/12

10:48 am-11:10 am

2 stops18h 22m

Shannon

Thu 6/19

1:05 pm-11:51 pm

2 stops16h 46m

$840

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 7/4

12:28 pm-9:45 am

1 stop15h 17m

Dublin

Wed 7/16

1:45 pm-11:49 pm

1 stop16h 04m

$855

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 5/15

11:32 am-7:55 am

1 stop14h 23m

Dublin

Thu 5/22

10:00 am-4:47 pm

1 stop12h 47m

$856

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sat 7/5

10:30 am-1:30 pm

2 stops21h 00m

Cork

Tue 7/22

6:00 am-8:36 pm

2 stops20h 36m

$887

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 35 results

Best time to book a flight from St. Louis to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from St. Louis 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 St. Louis to Ireland

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

Currently, November is the cheapest month in which you can book a flight from St. Louis to Ireland (average of $509). Flying from St. Louis to Ireland in June is currently the most expensive (average of $981). 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.

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

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

Rainfall in Ireland by month

In terms of precipitation, rainfall in Ireland ranges from 1.9 - 3.1 inches per month. October is typically the wettest month, when rainfall can reach 3.1 in. February is typically the driest time to visit Ireland when rainfall is around 1.9 in.

Temperature in Ireland by month

If weather is an important factor for your trip to Ireland, 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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Ireland

To help decide which airline to fly from St. Louis to Ireland, see what other customers have to say about Delta, KLM and Austrian Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,936 reviews

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.6

Good

780 reviews

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.4

Good

1,446 reviews

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very good

7,936 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What airport do you fly from for flights from St. Louis to Ireland?
For a flight from St. Louis to Ireland, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.
What are the cheapest airlines to fly from St. Louis to Ireland one-way?
The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $411. However, be on the lookout for offers from Air Canada and United Airlines, as they are both options that can get you from St. Louis to Ireland for a low price.
What are the most popular routes from St. Louis to Ireland?
While some choose either Lambert-St Louis - Shannon or Lambert-St Louis - Cork, Lambert-St Louis - Dublin is the most popular route from St. Louis to Ireland.
Can I find deals for flights from St. Louis to Ireland that include hotel bookings?
Yes. In addition to deals on St. Louis to Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Ireland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Ireland.
Can I find deals for business class flights from St. Louis to Ireland?
Yes. Cheapflights offers flight deals from St. Louis to Ireland 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 St. Louis to Ireland?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Ireland (average of $509). Flying from St. Louis to Ireland in June is currently the most expensive (average of $981). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 9 airlines flying from St. Louis to Ireland

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$451	Average$629	FlexibilityNo cancel fee	On-time70%
Iberia	Cheapest$491	Average$867	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$498	Average$934	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$501	Average$995	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$505	Average$848	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$518	Average$835	FlexibilityNo cancel fee	On-time71%
KLM	Cheapest$532	Average$614	FlexibilityNo cancel fee	On-time75%
Lufthansa	Cheapest$560	Average$880	FlexibilityNo cancel fee	On-time76%
Aer Lingus	Cheapest$740	Average$1,091	FlexibilityNo cancel fee	On-timeN/A

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$330+ Cheap flights from St. Louis (STL) to Ireland

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to Ireland

Keep the following information in mind while searching for St. Louis to Ireland flight deals. Data was last updated April 29, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Ireland

Cheapest flights from St. Louis to IrelandExplore the most affordable flight options available from St. Louis to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Explore the most affordable flight options available from St. Louis to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from St. Louis to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from St. Louis with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from St. Louis to Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

Rainfall in Ireland by month

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

Temperature in Ireland by month

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

Reviews of airlines servicing Ireland

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Ireland. 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 from for flights from St. Louis to Ireland?

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

What are the most popular routes from St. Louis to Ireland?

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

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

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

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

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

Top 9 airlines flying from St. Louis to Ireland

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Cheapest flights from St. Louis to Ireland
Explore the most affordable flight options available from St. Louis to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.