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

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 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 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.

$222 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

$342Aer Lingus

Tue, Dec 8 - Tue, Dec 15

4:05 pm - 5:10 am

STL

DUB

31h 05m

1 stop

1:00 pm - 3:26 pm

DUB

STL

32h 26m

1 stop

$349Aer Lingus

Mon, Nov 9 - Wed, Nov 18

10:33 am - 2:40 pm

STL

ORK

22h 07m

2 stops

6:15 am - 11:21 pm

ORK

STL

23h 06m

2 stops

$766Delta

Wed, Aug 12 - Wed, Aug 19

4:50 pm - 10:15 am

STL

SNN

11h 25m

1 stop

9:30 am - 3:38 pm

SNN

STL

12h 08m

1 stop

$779United Airlines

Sun, Aug 16 - Fri, Aug 28

6:00 am - 11:10 am

STL

SNN

23h 10m

2 stops

1:05 pm - 8:42 pm

SNN

STL

13h 37m

2 stops

$783Delta

Sun, Aug 16 - Fri, Aug 28

8:35 am - 10:15 am

STL

SNN

19h 40m

2 stops

9:30 am - 6:16 pm

SNN

STL

14h 46m

1 stop

$815United Airlines

Wed, Sep 9 - Thu, Sep 17

9:40 pm - 11:50 pm

STL

ORK

20h 10m

1 stop

11:25 am - 8:44 pm

ORK

STL

15h 19m

2 stops

$957British Airways

Sun, Aug 23 - Wed, Sep 9

12:10 pm - 3:10 pm

STL

ORK

21h 00m

2 stops

7:10 am - 10:59 pm

ORK

STL

21h 49m

3 stops

$989Air Canada

Sun, Aug 23 - Wed, Sep 9

12:10 pm - 3:10 pm

STL

ORK

21h 00m

2 stops

7:10 am - 10:59 pm

ORK

STL

21h 49m

3 stops

$1,028Air Canada

Sun, Aug 23 - Wed, Sep 9

9:40 pm - 3:10 pm

STL

ORK

11h 30m

1 stop

7:10 am - 7:30 pm

ORK

STL

18h 20m

1 stop

$1,128British 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

Oct 26

STL3:15 pmLambert-St Louis

11h 55m

1 stop

DUB8:10 amDublin

Nov 5

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$692

United Airlines

Dec 8

STL11:25 amLambert-St Louis

16h 30m

2 stops

DUB9:55 amDublin

Dec 15

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$696

United Airlines

Nov 7

STL5:34 pmLambert-St Louis

32h 36m

1 stop

DUB8:10 amDublin

Nov 20

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$697

Aer Lingus flights from St. Louis to Ireland

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

Aer Lingus

Aug 16

STL8:55 amLambert-St Louis

14h 15m

1 stop

DUB5:10 amDublin

Aug 25

DUB1:20 pmDublin

13h 04m

1 stop

STL8:24 pmLambert-St Louis

$347

Aer Lingus

Nov 9

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Nov 18

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$349

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

$353

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/8

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Tue 12/15

1:00 pm-3:26 pm

1 stop32h 26m

$342

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/9

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Wed 11/18

1:00 pm-3:26 pm

1 stop32h 26m

$349

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/12

10:33 am-2:40 pm

2 stops22h 07m

Cork

Wed 8/19

6:15 am-11:21 pm

2 stops23h 06m

$766

Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

4:50 pm-10:15 am

1 stop11h 25m

Shannon

Fri 8/28

9:30 am-3:38 pm

1 stop12h 08m

$779

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

6:00 am-11:10 am

2 stops23h 10m

Shannon

Fri 8/28

1:05 pm-8:42 pm

2 stops13h 37m

$783

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

8:35 am-10:15 am

2 stops19h 40m

Shannon

Thu 9/17

9:30 am-6:16 pm

1 stop14h 46m

$815

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-11:50 pm

1 stop20h 10m

Cork

Wed 9/9

11:25 am-8:44 pm

2 stops15h 19m

$957

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

12:10 pm-3:10 pm

2 stops21h 00m

Cork

Wed 9/9

7:10 am-10:59 pm

3 stops21h 49m

$989

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

12:10 pm-3:10 pm

2 stops21h 00m

Cork

Wed 9/9

7:10 am-10:59 pm

3 stops21h 49m

$1,028

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-3:10 pm

1 stop11h 30m

Cork

Wed 9/9

7:10 am-7:30 pm

1 stop18h 20m

$1,128

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 August is also cheap. Prices for this month can be found on momondo for an average of $334.

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 $720 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 9 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 1,638 reviews	Search Aer Lingus flights
Air Canada	PriceFrom $403	Free Cancellation	Rating 7.1 11,291 reviews	Search Air Canada flights
KLM	PriceFrom $412	Free Cancellation	Rating 7.8 1,533 reviews	Search KLM flights
British Airways	PriceFrom $418	Free Cancellation	Rating 6.7 8,093 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,108 reviews	Search Lufthansa flights
United Airlines	PriceFrom $456	Free Cancellation	Rating 7.4 9,929 reviews	Search United Airlines flights
Iberia	PriceFrom $466	Free Cancellation	Rating 7.0 3,250 reviews	Search Iberia flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,766 reviews	Search American Airlines flights
Delta	PriceFrom $483	Free Cancellation	Rating 7.8 8,452 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 $321

Flights to Shannon, Clarefrom $442

Flights to Corkfrom $547

Flights to Knockfrom $804

Flights to Milltown (Kerry)from $682

Flights to Donegalfrom $821

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 9/1. 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

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

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