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.

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

$349Aer Lingus

Mon, Nov 9 - Wed, Nov 18

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

Tue, Aug 11 - Wed, Aug 19

6:45 am - 10:40 am

STL

ORK

22h 55m

2 stops

11:15 am - 11:18 pm

ORK

STL

18h 03m

2 stops

$714Delta

Tue, Oct 27 - Wed, Nov 11

11:13 am - 2:40 pm

STL

ORK

21h 27m

2 stops

5:15 pm - 2:33 pm

ORK

STL

27h 18m

2 stops

$757Delta

Sun, Aug 16 - Mon, Aug 24

3:39 pm - 2:40 pm

STL

ORK

17h 01m

2 stops

6:15 am - 6:27 pm

ORK

STL

18h 12m

2 stops

$766Multiple Airlines

Wed, Aug 12 - Wed, Aug 19

3:39 pm - 2:40 pm

STL

ORK

17h 01m

2 stops

6:15 am - 6:27 pm

ORK

STL

18h 12m

2 stops

$767Multiple Airlines

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

12:59 pm - 10:15 am

STL

SNN

15h 16m

2 stops

9:30 am - 2:57 pm

SNN

STL

11h 27m

1 stop

$783United Airlines

Sun, Aug 16 - Fri, Aug 28

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Air Canada flights from St. Louis to Ireland

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

Air Canada

Aug 3

STL12:10 pmLambert-St Louis

13h 35m

1 stop

DUB7:45 amDublin

Aug 19

DUB9:20 amDublin

10h 42m

1 stop

STL2:02 pmLambert-St Louis

$715

Air Canada

Aug 16

STL12:10 pmLambert-St Louis

13h 35m

1 stop

DUB7:45 amDublin

Aug 25

DUB9:50 amDublin

32h 12m

2 stops

STL12:02 pmLambert-St Louis

$734

Air Canada

Aug 10

STL12:10 pmLambert-St Louis

13h 35m

1 stop

DUB7:45 amDublin

Aug 20

DUB9:20 amDublin

36h 18m

2 stops

STL3:38 pmLambert-St Louis

$739

Aer Lingus flights from St. Louis to Ireland

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

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 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

$355

Aer Lingus

Sep 2

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

$367

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

$349

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

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

$355

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Tue 10/27

6:45 am-10:40 am

2 stops22h 55m

Cork

Wed 11/11

11:15 am-11:18 pm

2 stops18h 03m

$714

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/16

11:13 am-2:40 pm

2 stops21h 27m

Cork

Mon 8/24

5:15 pm-2:33 pm

2 stops27h 18m

$757

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/12

3:39 pm-2:40 pm

2 stops17h 01m

Cork

Wed 8/19

6:15 am-6:27 pm

2 stops18h 12m

$766

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/12

3:39 pm-2:40 pm

2 stops17h 01m

Cork

Wed 8/19

6:15 am-6:27 pm

2 stops18h 12m

$767

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

12:59 pm-10:15 am

2 stops15h 16m

Shannon

Fri 8/28

9:30 am-2:57 pm

1 stop11h 27m

$783

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 $717 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.

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 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 1,620 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 9,876 reviews	Search United Airlines flights
British Airways	PriceFrom $418	Free Cancellation	Rating 6.7 8,065 reviews	Search British Airways flights
Air Canada	PriceFrom $428	Free Cancellation	Rating 7.1 11,244 reviews	Search Air Canada flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,089 reviews	Search Lufthansa flights
Iberia	PriceFrom $466	Free Cancellation	Rating 7.0 3,247 reviews	Search Iberia flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,746 reviews	Search American Airlines flights
Delta	PriceFrom $483	Free Cancellation	Rating 7.8 8,424 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

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.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Thu 7/23

Thu 7/30

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland

Popular cities

Other flights from St. Louis

Other flights to Ireland

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Ireland

Flights to Dublinfrom $321

Flights to Shannon, Clarefrom $597

Flights to Corkfrom $624

Flights to Knockfrom $770

Flights to Milltown (Kerry)from $783

Flights to Donegalfrom $793

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.

Find the cheapest flights from St. Louis to Ireland

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

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

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?

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