What airlines fly to Ireland?

United Airlines, American Airlines and Aer Lingus 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 43% 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.

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

Aer Lingus and United Airlines are the most popular carriers operating from Lambert-St Louis to Ireland

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 June 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.

$225 Cheap Flights from St. Louis to Ireland in 2026

Discover deals from 900+ travel sites with momondo.

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.

4:15 pm - 5:10 am

STL

DUB

30h 55m

1 stop

1:00 pm - 3:30 pm

DUB

STL

32h 30m

1 stop

$350Aer Lingus

Mon, Nov 9 - Wed, Nov 18

8:55 am - 5:10 am

STL

DUB

14h 15m

1 stop

1:20 pm - 2:02 pm

DUB

STL

30h 42m

1 stop

$354Aer Lingus

Tue, Aug 11 - Wed, Aug 19

8:55 am - 5:10 am

STL

DUB

14h 15m

1 stop

1:20 pm - 2:02 pm

DUB

STL

30h 42m

1 stop

$355Aer Lingus

Mon, Aug 3 - Wed, Aug 19

3:40 pm - 2:45 pm

STL

ORK

18h 05m

2 stops

5:15 pm - 6:56 pm

ORK

STL

31h 41m

2 stops

$710Delta

Sun, Oct 25 - Thu, Nov 12

5:45 pm - 4:40 pm

STL

ORK

17h 55m

2 stops

11:15 am - 11:18 pm

ORK

STL

18h 03m

2 stops

$714KLM

Tue, Oct 27 - Wed, Nov 11

7:05 pm - 4:40 pm

STL

ORK

16h 35m

2 stops

3:25 pm - 11:59 am

ORK

STL

26h 34m

2 stops

$721Delta

Sun, Oct 25 - Fri, Nov 13

12:59 pm - 7:30 am

STL

SNN

12h 31m

1 stop

12:30 pm - 9:09 pm

SNN

STL

14h 39m

1 stop

$770United Airlines

Mon, Sep 21 - Thu, Oct 1

6:14 am - 7:30 am

STL

SNN

19h 16m

2 stops

9:30 am - 3:38 pm

SNN

STL

12h 08m

1 stop

$771United Airlines

Mon, Aug 3 - Wed, Aug 19

3:15 pm - 3:25 pm

STL

ORK

19h 10m

3 stops

11:55 am - 3:30 pm

ORK

STL

33h 35m

2 stops

$932Multiple Airlines

Tue, Oct 27 - Wed, Nov 11

12:10 pm - 5:20 pm

STL

KIR

23h 10m

3 stops

10:25 am - 11:29 pm

KIR

STL

19h 04m

3 stops

$1,765Multiple Airlines

Sat, Aug 1 - Sat, Aug 8

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Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets

Aer Lingus

Nov 9

STL4:15 pmLambert-St Louis

30h 55m

1 stop

DUB5:10 amDublin

Nov 18

DUB1:00 pmDublin

32h 30m

1 stop

STL3:30 pmLambert-St Louis

$350

Aer Lingus

Aug 11

STL8:55 amLambert-St Louis

14h 15m

1 stop

DUB5:10 amDublin

Aug 19

DUB1:20 pmDublin

30h 42m

1 stop

STL2:02 pmLambert-St Louis

$354

Aer Lingus

Aug 3

STL8:55 amLambert-St Louis

14h 15m

1 stop

DUB5:10 amDublin

Aug 19

DUB1:20 pmDublin

30h 42m

1 stop

STL2:02 pmLambert-St Louis

$355

American Airlines flights from St. Louis to Ireland

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

American Airlines

Jun 19

STL8:14 pmLambert-St Louis

9h 36m

1 stop

DUB11:50 amDublin

Jul 3

DUB9:30 amDublin

14h 16m

1 stop

STL5:46 pmLambert-St Louis

$1,503

American Airlines

Jun 19

STL8:14 pmLambert-St Louis

9h 36m

1 stop

DUB11:50 amDublin

Jul 3

DUB11:45 amDublin

11h 36m

1 stop

STL5:21 pmLambert-St Louis

$1,504

American Airlines

Jun 19

STL11:18 amLambert-St Louis

13h 12m

1 stop

DUB6:30 amDublin

Jun 21

DUB11:45 amDublin

14h 12m

1 stop

STL7:57 pmLambert-St Louis

$1,573

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/9

4:15 pm-5:10 am

1 stop30h 55m

Dublin

Wed 11/18

1:00 pm-3:30 pm

1 stop32h 30m

$350

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 8/19

1:20 pm-2:02 pm

1 stop30h 42m

$354

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 8/3

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 8/19

1:20 pm-2:02 pm

1 stop30h 42m

$355

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 10/25

3:40 pm-2:45 pm

2 stops18h 05m

Cork

Thu 11/12

5:15 pm-6:56 pm

2 stops31h 41m

$710

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 10/27

5:45 pm-4:40 pm

2 stops17h 55m

Cork

Wed 11/11

11:15 am-11:18 pm

2 stops18h 03m

$714

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 10/25

7:05 pm-4:40 pm

2 stops16h 35m

Cork

Fri 11/13

3:25 pm-11:59 am

2 stops26h 34m

$721

Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 9/21

12:59 pm-7:30 am

1 stop12h 31m

Shannon

Thu 10/1

12:30 pm-9:09 pm

1 stop14h 39m

$770

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 8/3

6:14 am-7:30 am

2 stops19h 16m

Shannon

Wed 8/19

9:30 am-3:38 pm

1 stop12h 08m

$771

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 10/27

3:15 pm-3:25 pm

3 stops19h 10m

Cork

Wed 11/11

11:55 am-3:30 pm

2 stops33h 35m

$932

St. LouisMilltown (Kerry)

STL - KIR

STLKIR

Lambert-St Louis

Sat 8/1

12:10 pm-5:20 pm

3 stops23h 10m

Milltown (Kerry)

Sat 8/8

10:25 am-11:29 pm

3 stops19h 04m

$1,765

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, September 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 $322. If you aren’t able to travel to Ireland during the month of September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $349.

How far in advance should I book a flight from St. Louis 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 $718 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 $497 on momondo.

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

You could potentially save up to 61% 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	9h 36m
Direct flights	None

The fastest flight from St. Louis to Ireland takes 9h 36m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Ireland

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 June 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
Aer Lingus	PriceFrom $325	Free Cancellation	Rating 7.3 1,604 reviews	Search Aer Lingus flights
KLM	PriceFrom $412	Free Cancellation	Rating 7.8 1,530 reviews	Search KLM flights
United Airlines	PriceFrom $416	Free Cancellation	Rating 7.4 9,855 reviews	Search United Airlines flights
British Airways	PriceFrom $418	Free Cancellation	Rating 6.7 8,054 reviews	Search British Airways flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,209 reviews	Search Air Canada flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,069 reviews	Search Lufthansa flights
Iberia	PriceFrom $465	Free Cancellation	Rating 7.0 3,238 reviews	Search Iberia flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,679 reviews	Search American Airlines flights
Delta	PriceFrom $483	Free Cancellation	Rating 7.8 8,409 reviews	Search Delta 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

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Popular cities in Ireland

Flights to Dublinfrom $323

Flights to Shannon, Clarefrom $599

Flights to Corkfrom $592

Flights to Knockfrom $841

Flights to Milltown (Kerry)from $771

Flights to Donegalfrom $626

Cheap flights from St. Louis to Ireland from $225

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 8/19. 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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Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus deals on St. Louis to Ireland flight tickets

American Airlines flights from St. Louis to Ireland

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

momondo Fare Finder

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

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 from St. Louis 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

Frequently asked questions about flying from St. Louis to Ireland

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