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

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

What airlines fly to Ireland?

Aer Lingus, United Airlines and American Airlines are the top three most popular airlines that fly to Ireland from St. Louis according to our data. Aer Lingus 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.

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 September 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.

$342 Cheap Flights from St. Louis to Ireland in 2026/27

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.

1:18 pm - 8:10 amSTL Lambert-St Louis-DUB Dublin

12h 52m1 stop Chicago O'Hare Intl

9:00 am - 12:22 pmDUB Dublin-STL Lambert-St Louis

33h 22m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$529United Airlines

Tue, Dec 8 - Tue, Dec 15

9:40 am - 8:10 amSTL Lambert-St Louis-DUB Dublin

16h 30m1 stop Chicago O'Hare Intl

9:00 am - 12:22 pmDUB Dublin-STL Lambert-St Louis

33h 22m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$529United Airlines

Tue, Dec 8 - Tue, Dec 15

9:40 pm - 2:30 pmSTL Lambert-St Louis-DUB Dublin

10h 50m1 stop London Heathrow

1:25 pm - 11:59 pmDUB Dublin-STL Lambert-St Louis

16h 34m2 stops London Heathrow Chicago O'Hare Intl

$537British Airways

Sun, Oct 18 - Tue, Nov 3

9:40 pm - 2:30 pmSTL Lambert-St Louis-DUB Dublin

10h 50m1 stop London Heathrow

8:50 am - 7:22 pmDUB Dublin-STL Lambert-St Louis

16h 32m2 stops London Heathrow Chicago O'Hare Intl

$539British Airways

Sun, Oct 18 - Tue, Nov 3

10:14 am - 8:45 amSTL Lambert-St Louis-DUB Dublin

16h 31m1 stop Atlanta Hartsfield-Jackson

10:45 am - 9:59 pmDUB Dublin-STL Lambert-St Louis

17h 14m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson

$546Delta

Sun, Oct 18 - Tue, Nov 3

10:53 am - 7:10 amSTL Lambert-St Louis-DUB Dublin

14h 17m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:00 am - 3:26 pmDUB Dublin-STL Lambert-St Louis

12h 26m1 stop Toronto Pearson Intl

$546Air Canada

Wed, Nov 11 - Thu, Nov 19

12:00 pm - 8:45 amSTL Lambert-St Louis-DUB Dublin

14h 45m1 stop Atlanta Hartsfield-Jackson

10:45 am - 8:51 pmDUB Dublin-STL Lambert-St Louis

16h 06m2 stops New York John F Kennedy Intl Detroit Metropolitan Wayne County

$546Air France

Sun, Oct 18 - Tue, Nov 3

10:53 am - 7:10 amSTL Lambert-St Louis-DUB Dublin

14h 17m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:00 am - 9:40 pmDUB Dublin-STL Lambert-St Louis

18h 40m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$551Air Canada

Wed, Nov 11 - Thu, Nov 19

5:20 pm - 7:55 amSTL Lambert-St Louis-DUB Dublin

32h 35m1 stop Minneapolis St Paul

9:55 am - 11:26 pmDUB Dublin-STL Lambert-St Louis

19h 31m1 stop Minneapolis St Paul

$556Delta

Tue, Dec 8 - Thu, Dec 17

12:47 pm - 9:45 amSTL Lambert-St Louis-DUB Dublin

14h 58m1 stop Dallas/Fort Worth

12:55 pm - 8:20 pmDUB Dublin-STL Lambert-St Louis

13h 25m1 stop Dallas/Fort Worth

$556Finnair

Wed, Oct 21 - Wed, Nov 18

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 8:55 amSTL Lambert-St Louis-DUB Dublin

20h 55m1 stop Washington, D.C. Reagan-National

4:25 pm - 4:27 pmDUB Dublin-STL Lambert-St Louis

30h 02m1 stop Washington, D.C. Dulles Intl

$1,003Aer Lingus

Fri, Sep 18 - Sun, Sep 27

12:59 pm - 8:15 amSTL Lambert-St Louis-DUB Dublin

37h 16m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:20 am - 2:00 pmDUB Dublin-STL Lambert-St Louis

10h 40m1 stop Toronto Pearson Intl

$1,086Multiple Airlines

Fri, Sep 18 - Sun, Sep 27

12:59 pm - 7:45 amSTL Lambert-St Louis-DUB Dublin

12h 46m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

9:20 am - 2:00 pmDUB Dublin-STL Lambert-St Louis

10h 40m1 stop Toronto Pearson Intl

$1,088Air Canada

Fri, Sep 18 - Sun, Sep 20

8:20 am - 7:30 amSTL Lambert-St Louis-DUB Dublin

17h 10m1 stop Newark

9:20 am - 2:00 pmDUB Dublin-STL Lambert-St Louis

10h 40m1 stop Toronto Pearson Intl

$1,089United Airlines

Fri, Sep 18 - Sun, Sep 20

12:59 pm - 7:45 amSTL Lambert-St Louis-DUB Dublin

12h 46m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

9:20 am - 6:41 pmDUB Dublin-STL Lambert-St Louis

39h 21m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

$1,096Multiple Airlines

Fri, Sep 18 - Sun, Sep 20

6:30 am - 8:15 amSTL Lambert-St Louis-DUB Dublin

19h 45m1 stop Philadelphia

11:35 am - 4:48 pmDUB Dublin-STL Lambert-St Louis

11h 13m1 stop Chicago O'Hare Intl

$1,203Aer Lingus

Sun, Sep 20 - Sat, Sep 26

6:43 pm - 6:20 pmSTL Lambert-St Louis-DUB Dublin

17h 37m2 stops Dallas/Fort Worth London Heathrow

7:00 pm - 9:57 pmDUB Dublin-STL Lambert-St Louis

32h 57m2 stops London Heathrow Dallas/Fort Worth

$1,216British Airways

Sun, Sep 20 - Sat, Sep 26

9:40 pm - 7:35 pmSTL Lambert-St Louis-DUB Dublin

15h 55m1 stop London Heathrow

7:00 pm - 11:41 pmDUB Dublin-STL Lambert-St Louis

34h 41m2 stops London Heathrow Charlotte Douglas

$1,253British Airways

Sun, Sep 20 - Sat, Sep 26

12:10 pm - 7:45 amSTL Lambert-St Louis-DUB Dublin

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

9:20 am - 11:22 amDUB Dublin-STL Lambert-St Louis

32h 02m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$1,291United Airlines

Sun, Sep 20 - Sat, Sep 26

12:10 pm - 7:45 amSTL Lambert-St Louis-DUB Dublin

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

9:20 am - 12:15 pmDUB Dublin-STL Lambert-St Louis

32h 55m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,291Air Canada

Sun, Sep 20 - Sat, Sep 26

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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

Dec 12

STL6:55 pmLambert-St Louis

30h 15m

2 stops

DUB7:10 amDublin

Jan 17

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$570

Air Canada

Nov 11

STL8:30 amLambert-St Louis

16h 40m

2 stops

DUB7:10 amDublin

Nov 21

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$596

Air Canada

Nov 4

STL9:40 amLambert-St Louis

15h 30m

2 stops

DUB7:10 amDublin

Nov 14

DUB9:00 amDublin

18h 40m

2 stops

STL9:40 pmLambert-St Louis

$601

United Airlines flights from St. Louis to Ireland

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

United Airlines

Dec 8

STL1:18 pmLambert-St Louis

12h 52m

1 stop

DUB8:10 amDublin

Dec 15

DUB9:00 amDublin

33h 22m

2 stops

STL12:22 pmLambert-St Louis

$529

United Airlines

Dec 8

STL1:18 pmLambert-St Louis

12h 12m

2 stops

DUB7:30 amDublin

Dec 15

DUB9:00 amDublin

33h 22m

2 stops

STL12:22 pmLambert-St Louis

$534

United Airlines

Dec 8

STL5:25 amLambert-St Louis

20h 45m

1 stop

DUB8:10 amDublin

Dec 15

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$542

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

1:18 pm-8:10 am

1 stop12h 52m

Dublin

Tue 12/15

9:00 am-12:22 pm

2 stops33h 22m

$529

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

9:40 am-8:10 am

1 stop16h 30m

Dublin

Tue 12/15

9:00 am-12:22 pm

2 stops33h 22m

$529

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/18

9:40 pm-2:30 pm

1 stop10h 50m

Dublin

Tue 11/3

1:25 pm-11:59 pm

2 stops16h 34m

$537

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/18

9:40 pm-2:30 pm

1 stop10h 50m

Dublin

Tue 11/3

8:50 am-7:22 pm

2 stops16h 32m

$539

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/18

10:14 am-8:45 am

1 stop16h 31m

Dublin

Tue 11/3

10:45 am-9:59 pm

2 stops17h 14m

$546

Quickest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 11/11

10:53 am-7:10 am

2 stops14h 17m

Dublin

Thu 11/19

9:00 am-3:26 pm

1 stop12h 26m

$546

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/18

12:00 pm-8:45 am

1 stop14h 45m

Dublin

Tue 11/3

10:45 am-8:51 pm

2 stops16h 06m

$546

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 11/11

10:53 am-7:10 am

2 stops14h 17m

Dublin

Thu 11/19

9:00 am-9:40 pm

2 stops18h 40m

$551

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

5:20 pm-7:55 am

1 stop32h 35m

Dublin

Thu 12/17

9:55 am-11:26 pm

1 stop19h 31m

$556

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 10/21

12:47 pm-9:45 am

1 stop14h 58m

Dublin

Wed 11/18

12:55 pm-8:20 pm

1 stop13h 25m

$556

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 $434. 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 $467.

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 $715 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 $503 on momondo.

Can stopping save me money on St. Louis to Ireland flights?

You could potentially save up to 65% 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

Best Price Found	$342
Fastest flight time	10h 50m
Direct flights	None

The best one-way flight to Ireland from St. Louis in the past 72 hours is $342. The best round-trip flight deal from St. Louis to Ireland found on momondo in the last 72 hours is $529.

The fastest flight from St. Louis to Ireland takes 10h 50m

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 September 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 1,767 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,228 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,229 reviews	Search Lufthansa flights
Air Canada	PriceFrom $474	Free Cancellation	Rating 7.1 11,640 reviews	Search Air Canada flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 12,076 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,579 reviews	Search Delta flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,214 reviews	Search United Airlines flights
KLM	PriceFrom $538	Free Cancellation	Rating 7.8 1,578 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 $392

Flights to Shannon, Clarefrom $456

Flights to Corkfrom $482

Flights to Knockfrom $659

Flights to Milltown (Kerry)from $582

Flights to Donegalfrom $993

Cheap flights from St. Louis to Ireland from $342

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 12/7. 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

United Airlines flights from St. Louis to Ireland

Our best United Airlines 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?

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

Best Price Found

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