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

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

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.

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

31h 55m

1 stop

1:00 pm - 3:30 pm

DUB

STL

32h 30m

1 stop

$350Aer Lingus

Mon, Oct 26 - Wed, Nov 4

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

9:43 am - 7:30 am

STL

SNN

15h 47m

1 stop

9:30 am - 3:38 pm

SNN

STL

12h 08m

1 stop

$770United Airlines

Wed, Sep 9 - Tue, Sep 22

11:15 am - 10:15 am

STL

SNN

17h 00m

2 stops

12:30 pm - 10:00 pm

SNN

STL

15h 30m

2 stops

$774United Airlines

Wed, Sep 9 - Tue, Sep 22

3:39 pm - 11:10 am

STL

SNN

13h 31m

2 stops

1:05 pm - 9:37 am

SNN

STL

26h 32m

2 stops

$783Delta

Sun, Aug 16 - Fri, Aug 28

11:00 am - 2:40 pm

STL

ORK

21h 40m

2 stops

10:50 am - 11:01 pm

ORK

STL

18h 11m

2 stops

$799Delta

Sun, Aug 23 - Wed, Sep 9

4:15 pm - 11:25 pm

STL

ORK

26h 10m

2 stops

11:55 am - 12:34 am

ORK

STL

18h 39m

3 stops

$938Air Canada

Tue, Oct 27 - Tue, Nov 10

9:40 pm - 7:50 pm

STL

ORK

16h 10m

1 stop

11:25 am - 12:27 am

ORK

STL

19h 02m

2 stops

$958British Airways

Sun, Aug 23 - Wed, Sep 9

12:10 pm - 10:45 am

STL

ORK

16h 35m

2 stops

7:10 am - 9:31 pm

ORK

STL

20h 21m

3 stops

$990Air Canada

Sun, Aug 23 - Wed, Sep 9

9:40 pm - 7:50 pm

STL

ORK

16h 10m

1 stop

7:10 am - 7:30 pm

ORK

STL

18h 20m

1 stop

$1,031British Airways

Sun, Aug 23 - Wed, Sep 9

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United Airlines flights from St. Louis to Ireland

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

United Airlines

Nov 9

STL5:20 pmLambert-St Louis

10h 35m

1 stop

DUB9:55 amDublin

Nov 20

DUB9:00 amDublin

12h 30m

1 stop

STL3:30 pmLambert-St Louis

$692

United Airlines

Sep 6

STL12:59 pmLambert-St Louis

12h 46m

2 stops

DUB7:45 amDublin

Sep 15

DUB9:20 amDublin

15h 21m

1 stop

STL6:41 pmLambert-St Louis

$695

United Airlines

Nov 9

STL1:00 pmLambert-St Louis

12h 30m

2 stops

DUB7:30 amDublin

Nov 18

DUB9:00 amDublin

12h 30m

1 stop

STL3:30 pmLambert-St Louis

$697

Delta flights from St. Louis to Ireland

Our best Delta deals on St. Louis to Ireland flight tickets

Delta

Nov 11

STL3:45 pmLambert-St Louis

10h 10m

1 stop

DUB7:55 amDublin

Nov 20

DUB5:45 amDublin

23h 33m

2 stops

STL11:18 pmLambert-St Louis

$702

Delta

Oct 27

STL3:42 pmLambert-St Louis

19h 58m

2 stops

ORK4:40 pmCork

Nov 10

ORK5:45 amCork

20h 52m

2 stops

STL8:37 pmLambert-St Louis

$742

Delta

Aug 23

STL11:00 amLambert-St Louis

21h 40m

2 stops

ORK2:40 pmCork

Sep 9

ORK10:50 amCork

18h 11m

2 stops

STL11:01 pmLambert-St Louis

$799

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 10/26

4:15 pm-5:10 am

1 stop31h 55m

Dublin

Wed 11/4

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

Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

9:43 am-7:30 am

1 stop15h 47m

Shannon

Tue 9/22

9:30 am-3:38 pm

1 stop12h 08m

$770

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

11:15 am-10:15 am

2 stops17h 00m

Shannon

Tue 9/22

12:30 pm-10:00 pm

2 stops15h 30m

$774

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

3:39 pm-11:10 am

2 stops13h 31m

Shannon

Fri 8/28

1:05 pm-9:37 am

2 stops26h 32m

$783

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

11:00 am-2:40 pm

2 stops21h 40m

Cork

Wed 9/9

10:50 am-11:01 pm

2 stops18h 11m

$799

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 10/27

4:15 pm-11:25 pm

2 stops26h 10m

Cork

Tue 11/10

11:55 am-12:34 am

3 stops18h 39m

$938

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-7:50 pm

1 stop16h 10m

Cork

Wed 9/9

11:25 am-12:27 am

2 stops19h 02m

$958

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

12:10 pm-10:45 am

2 stops16h 35m

Cork

Wed 9/9

7:10 am-9:31 pm

3 stops20h 21m

$990

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-7:50 pm

1 stop16h 10m

Cork

Wed 9/9

7:10 am-7:30 pm

1 stop18h 20m

$1,031

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 $709 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 $477 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	12h 40m
Direct flights	None

The fastest flight from St. Louis to Ireland takes 12h 40m

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 1,603 reviews	Search Aer Lingus flights
KLM	PriceFrom $412	Free Cancellation	Rating 7.8 1,527 reviews	Search KLM flights
British Airways	PriceFrom $418	Free Cancellation	Rating 6.7 8,044 reviews	Search British Airways flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,165 reviews	Search Air Canada flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,055 reviews	Search Lufthansa flights
United Airlines	PriceFrom $449	Free Cancellation	Rating 7.4 9,809 reviews	Search United Airlines flights
Iberia	PriceFrom $465	Free Cancellation	Rating 7.0 3,234 reviews	Search Iberia flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,646 reviews	Search American Airlines flights
Delta	PriceFrom $483	Free Cancellation	Rating 7.9 8,407 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 $310

Flights to Shannon, Clarefrom $598

Flights to Corkfrom $619

Flights to Knockfrom $795

Flights to Milltown (Kerry)from $760

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 8/11. 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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United Airlines flights from St. Louis to Ireland

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

Delta flights from St. Louis to Ireland

Our best Delta 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 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.

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Explore popular destinations other users love

According to popular flight searches on momondo this year