What airlines fly to Ireland?

United Airlines, Aer Lingus and American Airlines 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 38% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 8 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, United Airlines, and Air France 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 8 as of August 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.

4:05 pm - 5:10 am-

31h 05m

1:00 pm - 3:26 pm-

32h 26m

$338Aer Lingus

Sat, Jan 9 - Tue, Jan 19

4:05 pm - 5:10 am-

31h 05m

1:00 pm - 3:26 pm-

32h 26m

$339Aer Lingus

Sat, Jan 9 - Tue, Jan 19

1:08 pm - 8:10 am-

13h 02m

9:00 am - 12:06 pm-

33h 06m

$679United Airlines

Tue, Dec 8 - Tue, Dec 15

6:50 pm - 7:10 am-

55h 20m

5:10 am - 1:45 pm-

14h 35m

$683Multiple Airlines

Fri, Oct 30 - Wed, Nov 11

6:50 pm - 7:10 am-

55h 20m

5:10 am - 1:45 pm-

14h 35m

$683Multiple Airlines

Fri, Oct 30 - Wed, Nov 18

6:00 am - 7:10 am-

19h 10m

9:00 am - 12:12 pm-

33h 12m

$687Air Canada

Sun, Nov 1 - Fri, Nov 13

6:00 am - 7:10 am-

19h 10m

9:00 am - 10:32 am-

31h 32m

$687Air Canada

Sun, Nov 1 - Fri, Nov 20

11:38 am - 9:55 am-

16h 17m

9:00 am - 3:26 pm-

12h 26m

$692United Airlines

Mon, Nov 2 - Thu, Nov 19

7:00 am - 7:45 am-

18h 45m

8:50 am - 8:51 pm-

18h 01m

$702Delta

Mon, Nov 2 - Tue, Nov 10

1:02 pm - 8:45 am-

13h 43m

5:45 am - 5:00 pm-

17h 15m

$702Delta

Mon, Nov 2 - Wed, Nov 11

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Air Canada flights from St. Louis to Ireland

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

Air Canada

Oct 31

STL5:34 pmLambert-St Louis

32h 36m

2 stops

DUB7:10 amDublin

Nov 13

DUB9:00 amDublin

33h 12m

2 stops

STL12:12 pmLambert-St Louis

$687

Air Canada

Aug 19

STL12:10 pmLambert-St Louis

13h 35m

1 stop

DUB7:45 amDublin

Aug 26

DUB9:20 amDublin

36h 18m

2 stops

STL3:38 pmLambert-St Louis

$869

Air Canada

Aug 11

STL2:40 pmLambert-St Louis

35h 05m

2 stops

DUB7:45 amDublin

Aug 19

DUB9:20 amDublin

32h 42m

2 stops

STL12:02 pmLambert-St Louis

$877

Aer Lingus flights from St. Louis to Ireland

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

Aer Lingus

Jan 9

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Jan 19

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$338

Aer Lingus

Jan 9

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Jan 19

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$339

Aer Lingus

Sep 8

STL8:55 amLambert-St Louis

14h 15m

1 stop

DUB5:10 amDublin

Sep 15

DUB1:20 pmDublin

13h 00m

1 stop

STL8:20 pmLambert-St Louis

$343

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 1/9

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Tue 1/19

1:00 pm-3:26 pm

1 stop32h 26m

$338

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 1/9

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Tue 1/19

1:00 pm-3:26 pm

1 stop32h 26m

$339

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/8

1:08 pm-8:10 am

1 stop13h 02m

Dublin

Tue 12/15

9:00 am-12:06 pm

2 stops33h 06m

$679

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 10/30

6:50 pm-7:10 am

2 stops55h 20m

Dublin

Wed 11/11

5:10 am-1:45 pm

1 stop14h 35m

$683

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 10/30

6:50 pm-7:10 am

2 stops55h 20m

Dublin

Wed 11/18

5:10 am-1:45 pm

1 stop14h 35m

$683

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 11/1

6:00 am-7:10 am

2 stops19h 10m

Dublin

Fri 11/13

9:00 am-12:12 pm

2 stops33h 12m

$687

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 11/1

6:00 am-7:10 am

2 stops19h 10m

Dublin

Fri 11/20

9:00 am-10:32 am

2 stops31h 32m

$687

Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/2

11:38 am-9:55 am

1 stop16h 17m

Dublin

Thu 11/19

9:00 am-3:26 pm

1 stop12h 26m

$692

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/2

7:00 am-7:45 am

1 stop18h 45m

Dublin

Tue 11/10

8:50 am-8:51 pm

2 stops18h 01m

$702

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/2

1:02 pm-8:45 am

1 stop13h 43m

Dublin

Wed 11/11

5:45 am-5:00 pm

2 stops17h 15m

$702

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 $449. If you aren’t able to travel to Ireland during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $504.

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 $753 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 $581 on momondo.

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	11h 25m
Direct flights	None

The fastest flight from St. Louis to Ireland takes 11h 25m

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 8 as of August 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 1,689 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,147 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,176 reviews	Search Lufthansa flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,856 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,491 reviews	Search Delta flights
United Airlines	PriceFrom $487	Free Cancellation	Rating 7.4 10,068 reviews	Search United Airlines flights
Air Canada	PriceFrom $523	Free Cancellation	Rating 7.1 11,429 reviews	Search Air Canada flights
KLM	PriceFrom $532	Free Cancellation	Rating 7.8 1,554 reviews	Search KLM 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.

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Popular cities in Ireland

Flights to Dublinfrom $338

Flights to Shannon, Clarefrom $620

Flights to Corkfrom $663

Flights to Knockfrom $825

Flights to Milltown (Kerry)from $714

Flights to Donegalfrom $823

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 9/15. 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

Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus 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?

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

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