What is the cheapest airline that flies from Lambert-St Louis to Ireland?

Air Canada, United Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Ireland

What airlines fly to Ireland?

United Airlines, American Airlines and Air Canada are the top three most popular airlines that fly to Ireland from St. Louis according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 9 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Ireland?

Prices for flights from Lambert-St Louis Airport to Ireland are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Ireland?

The number of operators available for flights from Lambert-St Louis Airport to Ireland is 9 as of March 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Ireland?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ireland.

What documentation or ID do you need to fly to Ireland?

The travel and health documents required for your trip to Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$328 Cheap Flights from St. Louis to Ireland in 2026

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Find the cheapest flights from St. Louis to Ireland

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 9:45 am

STL

DUB

21h 45m

1 stop

9:20 am - 12:13 pm

DUB

STL

32h 53m

2 stops

$629United Airlines

Mon, Sep 7 - Tue, Sep 15

2:40 pm - 8:15 am

STL

DUB

11h 35m

1 stop

6:00 am - 1:25 pm

DUB

STL

13h 25m

1 stop

$630Multiple Airlines

Mon, Sep 7 - Tue, Sep 15

6:00 am - 7:45 am

STL

DUB

19h 45m

2 stops

9:50 am - 6:42 pm

DUB

STL

14h 52m

1 stop

$646Air Canada

Sun, Aug 16 - Tue, Aug 25

4:13 pm - 11:10 am

STL

SNN

12h 57m

1 stop

1:05 pm - 4:55 pm

SNN

STL

33h 50m

1 stop

$663KLM

Sun, Aug 16 - Fri, Aug 28

11:51 am - 11:10 am

STL

SNN

17h 19m

2 stops

1:05 pm - 11:37 pm

SNN

STL

16h 32m

2 stops

$712KLM

Sun, Aug 16 - Fri, Aug 28

7:09 pm - 4:20 pm

STL

ORK

15h 11m

2 stops

5:05 pm - 11:57 pm

ORK

STL

36h 52m

2 stops

$728Lufthansa

Mon, May 4 - Mon, May 11

6:00 am - 10:25 am

STL

ORK

22h 25m

2 stops

6:15 am - 9:09 pm

ORK

STL

20h 54m

2 stops

$820Delta

Sun, May 3 - Sun, May 10

6:55 pm - 4:30 pm

STL

ORK

39h 35m

2 stops

5:05 pm - 1:25 pm

ORK

STL

26h 20m

1 stop

$854Lufthansa

Sat, Sep 19 - Mon, Sep 28

1:02 pm - 2:40 pm

STL

ORK

19h 38m

2 stops

6:15 am - 9:09 pm

ORK

STL

20h 54m

2 stops

$881Delta

Tue, May 5 - Thu, May 21

12:10 pm - 3:10 pm

STL

ORK

21h 00m

2 stops

11:25 am - 2:02 pm

ORK

STL

32h 37m

2 stops

$904Air Canada

Sat, Aug 15 - Wed, Aug 19

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets

Air Canada

Aug 16

STL6:00 amLambert-St Louis

19h 45m

2 stops

DUB7:45 amDublin

Aug 25

DUB9:50 amDublin

14h 52m

1 stop

STL6:42 pmLambert-St Louis

$646

Air Canada

Aug 16

STL12:10 pmLambert-St Louis

14h 05m

2 stops

DUB8:15 amDublin

Aug 25

DUB9:20 amDublin

15h 22m

2 stops

STL6:42 pmLambert-St Louis

$657

Air Canada

Aug 11

STL12:10 pmLambert-St Louis

14h 05m

2 stops

DUB8:15 amDublin

Aug 19

DUB9:20 amDublin

39h 22m

2 stops

STL6:42 pmLambert-St Louis

$658

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets

United Airlines

Sep 7

STL6:00 amLambert-St Louis

21h 45m

1 stop

DUB9:45 amDublin

Sep 15

DUB9:20 amDublin

32h 53m

2 stops

STL12:13 pmLambert-St Louis

$629

United Airlines

Sep 2

STL5:00 amLambert-St Louis

20h 45m

2 stops

DUB7:45 amDublin

Sep 8

DUB9:20 amDublin

31h 46m

2 stops

STL11:06 amLambert-St Louis

$632

United Airlines

Sep 2

STL8:55 amLambert-St Louis

17h 20m

1 stop

DUB8:15 amDublin

Sep 8

DUB9:20 amDublin

32h 53m

2 stops

STL12:13 pmLambert-St Louis

$633

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/7

6:00 am-9:45 am

1 stop21h 45m

Dublin

Tue 9/15

9:20 am-12:13 pm

2 stops32h 53m

$629

Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 9/7

2:40 pm-8:15 am

1 stop11h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$630

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/16

6:00 am-7:45 am

2 stops19h 45m

Dublin

Tue 8/25

9:50 am-6:42 pm

1 stop14h 52m

$646

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

4:13 pm-11:10 am

1 stop12h 57m

Shannon

Fri 8/28

1:05 pm-4:55 pm

1 stop33h 50m

$663

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

11:51 am-11:10 am

2 stops17h 19m

Shannon

Fri 8/28

1:05 pm-11:37 pm

2 stops16h 32m

$712

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Mon 5/4

7:09 pm-4:20 pm

2 stops15h 11m

Cork

Mon 5/11

5:05 pm-11:57 pm

2 stops36h 52m

$728

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 5/3

6:00 am-10:25 am

2 stops22h 25m

Cork

Sun 5/10

6:15 am-9:09 pm

2 stops20h 54m

$820

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sat 9/19

6:55 pm-4:30 pm

2 stops39h 35m

Cork

Mon 9/28

5:05 pm-1:25 pm

1 stop26h 20m

$854

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 5/5

1:02 pm-2:40 pm

2 stops19h 38m

Cork

Thu 5/21

6:15 am-9:09 pm

2 stops20h 54m

$881

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sat 8/15

12:10 pm-3:10 pm

2 stops21h 00m

Cork

Wed 8/19

11:25 am-2:02 pm

2 stops32h 37m

$904

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Ireland?

In general, January is the cheapest month to fly from St. Louis to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $523. If you aren’t able to travel to Ireland during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $543.

How far in advance should I book a flight to Ireland?

You are more likely to see cheaper flights to Ireland from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around $733 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from St. Louis for as low as $571 on momondo.

Can stopping save me money on St. Louis to Ireland flights?

You could potentially save up to 53% on your flight if you consider stops on a St. Louis to Ireland flight.

Cheap St. Louis to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ireland

Fastest flight time	10h 13m
Direct flights	None

The fastest flight from St. Louis to Ireland takes 10h 13m

There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.

Search flight deals

When did momondo last update prices for flights from Lambert-St Louis Airport to Ireland?
Prices for flights from Lambert-St Louis Airport to Ireland are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Ireland?
The number of operators available for flights from Lambert-St Louis Airport to Ireland is 9 as of March 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Ireland?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ireland.
What documentation or ID do you need to fly to Ireland?
The travel and health documents required for your trip to Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Ireland

Compare and see reviews for airlines that fly from St. Louis to Ireland with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $412	Free Cancellation	Rating 7.8 1,477 reviews	Search KLM flights
British Airways	PriceFrom $418	Free Cancellation	Rating 6.7 7,812 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 7,863 reviews	Search Lufthansa flights
Air Canada	PriceFrom $456	Free Cancellation	Rating 7.1 10,835 reviews	Search Air Canada flights
Iberia	PriceFrom $466	Free Cancellation	Rating 7.0 3,150 reviews	Search Iberia flights
United Airlines	PriceFrom $468	Free Cancellation	Rating 7.4 9,467 reviews	Search United Airlines flights
Delta	PriceFrom $483	Free Cancellation	Rating 7.9 8,318 reviews	Search Delta flights
American Airlines	PriceFrom $483	Free Cancellation	Rating 7.1 11,492 reviews	Search American Airlines flights
Aer Lingus	PriceFrom $714	Free Cancellation	Rating 7.2 1,487 reviews	Search Aer Lingus flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Ireland?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Ireland. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Ireland with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Ireland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Ireland.

I’m not ready to book a flight from St. Louis to Ireland right now. Can momondo alert me if prices change?

Price alerts on flights to Ireland from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Feeling lucky

Popular cities in Ireland

Flights to Dublinfrom $338

Flights to Shannon, Clarefrom $469

Flights to Corkfrom $549

Flights to Milltown (Kerry)from $587

Flights to Knockfrom $778

Flights to Donegalfrom $787

Cheap flights from St. Louis to Ireland from $328

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ireland departing on 7/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets

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Our best United Airlines deals on St. Louis to Ireland flight tickets

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See travel insights to Ireland from

How to get the cheapest flight ticket from St. Louis to Ireland

What is the cheapest month to fly to Ireland?

How far in advance should I book a flight to Ireland?

Can stopping save me money on St. Louis to Ireland flights?

What is the cheapest airline that flies from Lambert-St Louis to Ireland?

What airlines fly to Ireland?

Cheap St. Louis to Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ireland

Fastest flight time

Direct flights

Best airlines flying from St. Louis to Ireland

Compare and see reviews for airlines that fly from St. Louis to Ireland with momondo

Why use momondo?

An easier way to manage your Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ireland

Popular cities in Ireland

Popular flights according to clicks in the last 7 days on momondo

St. Louis flight routes

According to popular flight searches on momondo this year

Ireland flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Ireland

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Ireland

List of cabin classes available on flights landing in Ireland. Availability may vary depending on flight origin and airline.

Complete your trip to Ireland

Explore popular destinations other users love

According to popular flight searches on momondo this year