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

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

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 39% 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.

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 July 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

STL

DUB

31h 05m

1 stop

1:00 pm - 3:26 pm

DUB

STL

32h 26m

1 stop

$343Aer Lingus

Tue, Jan 12 - Fri, Jan 22

4:05 pm - 5:10 am

STL

DUB

31h 05m

1 stop

1:00 pm - 3:26 pm

DUB

STL

32h 26m

1 stop

$343Aer Lingus

Mon, Nov 23 - Thu, Dec 3

6:50 pm - 5:10 pm

STL

DUB

17h 20m

2 stops

5:10 am - 1:45 pm

DUB

STL

14h 35m

1 stop

$693Lufthansa

Sun, Oct 25 - Fri, Nov 6

9:44 am - 7:30 am

STL

DUB

15h 46m

1 stop

5:10 am - 1:45 pm

DUB

STL

14h 35m

1 stop

$695Multiple Airlines

Wed, Nov 4 - Wed, Nov 11

6:00 am - 7:30 am

STL

DUB

20h 30m

1 stop

9:00 am - 3:26 pm

DUB

STL

12h 26m

1 stop

$697United Airlines

Sun, Oct 25 - Fri, Nov 6

8:25 am - 10:20 am

STL

DUB

19h 55m

1 stop

9:00 am - 3:26 pm

DUB

STL

12h 26m

1 stop

$697United Airlines

Tue, Dec 8 - Tue, Dec 15

9:40 am - 8:10 am

STL

DUB

16h 30m

1 stop

9:00 am - 3:26 pm

DUB

STL

12h 26m

1 stop

$697Multiple Airlines

Tue, Dec 8 - Tue, Dec 15

6:50 pm - 5:10 pm

STL

DUB

17h 20m

2 stops

5:10 am - 9:40 pm

DUB

STL

22h 30m

2 stops

$700Lufthansa

Sun, Oct 25 - Fri, Nov 6

12:10 pm - 7:45 am

STL

DUB

13h 35m

1 stop

9:20 am - 6:41 pm

DUB

STL

15h 21m

1 stop

$704Air Canada

Sun, Aug 23 - Tue, Sep 8

12:10 pm - 7:45 am

STL

DUB

13h 35m

1 stop

9:50 am - 6:41 pm

DUB

STL

14h 51m

2 stops

$728Air Canada

Sun, Aug 23 - Tue, Sep 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 23

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Dec 3

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$343

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

$347

Aer Lingus

Sep 7

STL8:55 amLambert-St Louis

14h 15m

1 stop

DUB5:10 amDublin

Sep 16

DUB1:20 pmDublin

13h 00m

1 stop

STL8:20 pmLambert-St Louis

$348

United Airlines flights from St. Louis to Ireland

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

United Airlines

Aug 23

STL4:50 pmLambert-St Louis

11h 25m

1 stop

SNN10:15 amShannon

Sep 8

SNN12:30 pmShannon

14h 17m

1 stop

STL8:47 pmLambert-St Louis

$774

United Airlines

Sep 9

STL8:00 amLambert-St Louis

17h 30m

1 stop

SNN7:30 amShannon

Sep 22

SNN12:30 pmShannon

17h 08m

1 stop

STL11:38 pmLambert-St Louis

$833

United Airlines

Sep 10

STL8:30 amLambert-St Louis

17h 00m

1 stop

SNN7:30 amShannon

Sep 17

SNN9:30 amShannon

12h 08m

1 stop

STL3:38 pmLambert-St Louis

$834

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 1/12

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Fri 1/22

1:00 pm-3:26 pm

1 stop32h 26m

$343

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/23

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Thu 12/3

1:00 pm-3:26 pm

1 stop32h 26m

$343

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 10/25

6:50 pm-5:10 pm

2 stops17h 20m

Dublin

Fri 11/6

5:10 am-1:45 pm

1 stop14h 35m

$693

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/4

9:44 am-7:30 am

1 stop15h 46m

Dublin

Wed 11/11

5:10 am-1:45 pm

1 stop14h 35m

$695

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 10/25

6:00 am-7:30 am

1 stop20h 30m

Dublin

Fri 11/6

9:00 am-3:26 pm

1 stop12h 26m

$697

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/8

8:25 am-10:20 am

1 stop19h 55m

Dublin

Tue 12/15

9:00 am-3:26 pm

1 stop12h 26m

$697

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/8

9:40 am-8:10 am

1 stop16h 30m

Dublin

Tue 12/15

9:00 am-3:26 pm

1 stop12h 26m

$697

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 10/25

6:50 pm-5:10 pm

2 stops17h 20m

Dublin

Fri 11/6

5:10 am-9:40 pm

2 stops22h 30m

$700

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/23

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/8

9:20 am-6:41 pm

1 stop15h 21m

$704

Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/23

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/8

9:50 am-6:41 pm

2 stops14h 51m

$728

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 $458. 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 $759 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 July 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 1,682 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,127 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,162 reviews	Search Lufthansa flights
United Airlines	PriceFrom $472	Free Cancellation	Rating 7.4 10,045 reviews	Search United Airlines flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,840 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,482 reviews	Search Delta flights
Air Canada	PriceFrom $523	Free Cancellation	Rating 7.1 11,398 reviews	Search Air Canada flights
KLM	PriceFrom $532	Free Cancellation	Rating 7.8 1,550 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 $343

Flights to Shannon, Clarefrom $453

Flights to Corkfrom $654

Flights to Knockfrom $774

Flights to Milltown (Kerry)from $755

Flights to Donegalfrom $757

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 9/9. 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

United Airlines flights from St. Louis to Ireland

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 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

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

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According to popular flight searches on momondo this year