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

Lufthansa, Air Canada, and Delta 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 37% 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.

$324 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.

12:46 pm - 9:45 amSTL Lambert-St Louis-DUB Dublin

14h 59m1 stop Dallas/Fort Worth

12:55 pm - 8:19 pmDUB Dublin-STL Lambert-St Louis

13h 24m1 stop Dallas/Fort Worth

$666Finnair

Mon, Oct 19 - Wed, Nov 4

1:15 pm - 8:10 amSTL Lambert-St Louis-DUB Dublin

12h 55m1 stop Chicago O'Hare Intl

9:00 am - 12:10 pmDUB Dublin-STL Lambert-St Louis

33h 10m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$679United Airlines

Tue, Dec 8 - Tue, Dec 15

5:40 pm - 8:10 amSTL Lambert-St Louis-DUB Dublin

32h 30m1 stop Chicago O'Hare Intl

9:00 am - 12:10 pmDUB Dublin-STL Lambert-St Louis

33h 10m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$679United Airlines

Tue, Dec 1 - Tue, Dec 15

8:55 am - 8:15 amSTL Lambert-St Louis-DUB Dublin

17h 20m1 stop Toronto Pearson Intl

5:10 am - 1:45 pmDUB Dublin-STL Lambert-St Louis

14h 35m1 stop Frankfurt am Main

$686Multiple Airlines

Mon, Oct 19 - Wed, Nov 4

2:33 pm - 8:45 amSTL Lambert-St Louis-DUB Dublin

12h 12m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

5:15 pm - 11:39 pmDUB Dublin-STL Lambert-St Louis

36h 24m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$692KLM

Sun, Dec 13 - Mon, Jan 18

7:03 am - 8:45 amSTL Lambert-St Louis-DUB Dublin

19h 42m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

8:50 am - 8:32 pmDUB Dublin-STL Lambert-St Louis

17h 42m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$707Delta

Tue, Dec 8 - Tue, Dec 15

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

16h 00m2 stops Detroit Metropolitan Wayne County New York John F Kennedy Intl

5:45 am - 4:50 pmDUB Dublin-STL Lambert-St Louis

17h 05m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$712Delta

Wed, Feb 24 - Wed, Mar 3

4:40 pm - 11:00 amSTL Lambert-St Louis-DUB Dublin

13h 20m1 stop Frankfurt am Main

5:10 am - 1:45 pmDUB Dublin-STL Lambert-St Louis

14h 35m1 stop Frankfurt am Main

$722Lufthansa

Sun, Oct 25 - Fri, Nov 6

4:40 pm - 11:00 amSTL Lambert-St Louis-DUB Dublin

13h 20m1 stop Frankfurt am Main

5:10 am - 1:45 pmDUB Dublin-STL Lambert-St Louis

14h 35m1 stop Frankfurt am Main

$723Lufthansa

Sun, Oct 25 - Fri, Nov 6

6:05 pm - 12:40 pmSTL Lambert-St Louis-DUB Dublin

13h 35m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

5:45 am - 3:37 pmDUB Dublin-STL Lambert-St Louis

15h 52m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$731KLM

Sun, Oct 25 - Fri, Nov 6

Cheap last minute flights

Enter your travel dates to find the best prices.

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

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

9:20 am - 12:02 pmDUB Dublin-STL Lambert-St Louis

32h 42m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$919United Airlines

Wed, Sep 2 - Sat, Sep 12

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

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

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

10h 40m1 stop Toronto Pearson Intl

$933Air Canada

Wed, Sep 2 - Sat, Sep 12

8:40 am - 4:55 pmSTL Lambert-St Louis-DUB Dublin

26h 15m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

5:55 am - 11:38 pmDUB Dublin-STL Lambert-St Louis

23h 43m2 stops Frankfurt am Main Newark

$934Lufthansa

Sun, Sep 6 - Sun, Sep 13

8:55 am - 7:45 amSTL Lambert-St Louis-DUB Dublin

16h 50m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

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

10h 40m1 stop Toronto Pearson Intl

$941Air Canada

Wed, Sep 2 - Sat, Sep 12

8:48 am - 7:55 amSTL Lambert-St Louis-DUB Dublin

17h 07m1 stop Minneapolis St Paul

5:55 am - 3:14 pmDUB Dublin-STL Lambert-St Louis

15h 19m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$944KLM

Wed, Sep 2 - Sat, Sep 12

3:30 pm - 11:40 amSTL Lambert-St Louis-DUB Dublin

14h 10m1 stop Frankfurt am Main

9:20 am - 8:20 pmDUB Dublin-STL Lambert-St Louis

17h 00m1 stop Toronto Pearson Intl

$946Multiple Airlines

Wed, Sep 2 - Sat, Sep 12

8:40 am - 4:55 pmSTL Lambert-St Louis-DUB Dublin

26h 15m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

5:45 pm - 10:59 pmDUB Dublin-STL Lambert-St Louis

35h 14m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$947Lufthansa

Sun, Sep 6 - Sun, Sep 13

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

13h 35m1 stop Montreal Pierre Elliott Trudeau Intl

5:35 pm - 1:25 pmDUB Dublin-STL Lambert-St Louis

25h 50m1 stop Frankfurt am Main

$949Multiple Airlines

Sun, Sep 6 - Sun, Sep 13

1:00 pm - 10:40 amSTL Lambert-St Louis-DUB Dublin

15h 40m1 stop Washington, D.C. Dulles Intl

9:20 am - 12:02 pmDUB Dublin-STL Lambert-St Louis

32h 42m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$971United Airlines

Fri, Sep 4 - Sat, Sep 12

2:10 pm - 10:25 amSTL Lambert-St Louis-DUB Dublin

14h 15m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

1:25 pm - 11:31 pmDUB Dublin-STL Lambert-St Louis

16h 06m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$1,341KLM

Thu, Sep 3 - Sat, Sep 5

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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

Nov 10

STL1:08 pmLambert-St Louis

13h 02m

1 stop

DUB8:10 amDublin

Nov 19

DUB9:00 amDublin

36h 43m

2 stops

STL3:43 pmLambert-St Louis

$699

United Airlines

Oct 19

STL10:27 amLambert-St Louis

14h 53m

2 stops

DUB7:20 amDublin

Nov 4

DUB1:35 pmDublin

15h 49m

2 stops

STL11:24 pmLambert-St Louis

$713

United Airlines

Oct 19

STL11:35 amLambert-St Louis

13h 45m

2 stops

DUB7:20 amDublin

Nov 4

DUB9:30 amDublin

14h 39m

2 stops

STL6:09 pmLambert-St Louis

$717

Air Canada flights from St. Louis to Ireland

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

Air Canada

Oct 20

STL8:55 amLambert-St Louis

17h 20m

1 stop

DUB8:15 amDublin

Nov 1

DUB9:00 amDublin

12h 23m

1 stop

STL3:23 pmLambert-St Louis

$750

Air Canada

Oct 24

STL12:10 pmLambert-St Louis

37h 00m

2 stops

DUB7:10 amDublin

Nov 1

DUB9:00 amDublin

12h 23m

1 stop

STL3:23 pmLambert-St Louis

$769

Air Canada

Oct 20

STL11:35 amLambert-St Louis

14h 40m

2 stops

DUB8:15 amDublin

Nov 1

DUB9:00 amDublin

18h 35m

2 stops

STL9:35 pmLambert-St Louis

$772

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 10/19

12:46 pm-9:45 am

1 stop14h 59m

Dublin

Wed 11/4

12:55 pm-8:19 pm

1 stop13h 24m

$666

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

1:15 pm-8:10 am

1 stop12h 55m

Dublin

Tue 12/15

9:00 am-12:10 pm

2 stops33h 10m

$679

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/1

5:40 pm-8:10 am

1 stop32h 30m

Dublin

Tue 12/15

9:00 am-12:10 pm

2 stops33h 10m

$679

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 10/19

8:55 am-8:15 am

1 stop17h 20m

Dublin

Wed 11/4

5:10 am-1:45 pm

1 stop14h 35m

$686

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 12/13

2:33 pm-8:45 am

2 stops12h 12m

Dublin

Mon 1/18

5:15 pm-11:39 pm

2 stops36h 24m

$692

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

7:03 am-8:45 am

2 stops19h 42m

Dublin

Tue 12/15

8:50 am-8:32 pm

2 stops17h 42m

$707

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 2/24

10:45 am-8:45 am

2 stops16h 00m

Dublin

Wed 3/3

5:45 am-4:50 pm

2 stops17h 05m

$712

Quickest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/25

4:40 pm-11:00 am

1 stop13h 20m

Dublin

Fri 11/6

5:10 am-1:45 pm

1 stop14h 35m

$722

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/25

4:40 pm-11:00 am

1 stop13h 20m

Dublin

Fri 11/6

5:10 am-1:45 pm

1 stop14h 35m

$723

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/25

6:05 pm-12:40 pm

2 stops13h 35m

Dublin

Fri 11/6

5:45 am-3:37 pm

2 stops15h 52m

$731

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 $435. 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 $485.

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 $704 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 83% 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	$324
Fastest flight time	11h 35m
Direct flights	None

The best one-way flight to Ireland from St. Louis in the past 72 hours is $324. The best round-trip flight deal from St. Louis to Ireland found on momondo in the last 72 hours is $666.

The fastest flight from St. Louis to Ireland takes 11h 35m

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 1,740 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,196 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,230 reviews	Search Lufthansa flights
Air Canada	PriceFrom $474	Free Cancellation	Rating 7.1 11,573 reviews	Search Air Canada flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 12,026 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,545 reviews	Search Delta flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,158 reviews	Search United Airlines flights
KLM	PriceFrom $532	Free Cancellation	Rating 7.8 1,570 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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Complete your trip

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Popular cities in Ireland

Flights to Dublinfrom $479

Flights to Shannon, Clarefrom $579

Flights to Corkfrom $611

Flights to Knockfrom $751

Flights to Milltown (Kerry)from $655

Flights to Donegalfrom $714

Cheap flights from St. Louis to Ireland from $324

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 10/14. 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

Air Canada flights from St. Louis to Ireland

Our best Air Canada 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