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

British Airways, KLM, and United Airlines 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 October 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.

$319 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.

5:00 am - 8:10 amSTL Lambert-St Louis-DUB Dublin

21h 10m1 stop Chicago O'Hare Intl

9:00 am - 3:57 pmDUB Dublin-STL Lambert-St Louis

36h 57m2 stops Toronto Pearson Intl Newark

$680United Airlines

Mon, Feb 15 - Thu, Feb 18

7:00 am - 6:10 amSTL Lambert-St Louis-DUB Dublin

18h 10m2 stops Chicago O'Hare Intl Toronto Pearson Intl

5:10 am - 2:45 pmDUB Dublin-STL Lambert-St Louis

14h 35m1 stop Frankfurt am Main

$683Multiple Airlines

Wed, Mar 17 - Wed, Mar 24

3:40 pm - 11:00 amSTL Lambert-St Louis-DUB Dublin

13h 20m1 stop Frankfurt am Main

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

12h 26m1 stop Toronto Pearson Intl

$684Multiple Airlines

Wed, Feb 10 - Thu, Feb 18

7:04 pm - 8:10 amSTL Lambert-St Louis-DUB Dublin

32h 06m1 stop Chicago O'Hare Intl

8:00 am - 10:06 pmDUB Dublin-STL Lambert-St Louis

43h 06m2 stops Toronto Pearson Intl Houston George Bush Intcntl

$685United Airlines

Sat, Mar 20 - Fri, Mar 26

4:40 pm - 4:30 pmSTL Lambert-St Louis-DUB Dublin

18h 50m1 stop Frankfurt am Main

5:10 am - 2:45 pmDUB Dublin-STL Lambert-St Louis

14h 35m1 stop Frankfurt am Main

$689Lufthansa

Wed, Mar 17 - Wed, Mar 24

4:10 pm - 8:15 amSTL Lambert-St Louis-DUB Dublin

10h 05m1 stop Toronto Pearson Intl

9:50 am - 10:27 amDUB Dublin-STL Lambert-St Louis

30h 37m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$693Air Canada

Mon, Apr 5 - Wed, Apr 14

6:00 am - 7:10 amSTL Lambert-St Louis-DUB Dublin

19h 10m2 stops Chicago O'Hare Intl Toronto Pearson Intl

8:00 am - 3:02 pmDUB Dublin-STL Lambert-St Louis

36h 02m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$693Air Canada

Mon, Mar 8 - Tue, Mar 23

2:11 pm - 9:40 amSTL Lambert-St Louis-DUB Dublin

13h 29m2 stops Chicago O'Hare Intl London Heathrow

11:30 am - 9:09 pmDUB Dublin-STL Lambert-St Louis

15h 39m1 stop Philadelphia

$704American Airlines

Tue, Feb 9 - Thu, Feb 25

6:45 pm - 4:55 pmSTL Lambert-St Louis-DUB Dublin

40h 10m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

5:55 am - 1:25 pmDUB Dublin-STL Lambert-St Louis

13h 30m1 stop Frankfurt am Main

$718Lufthansa

Sat, Apr 10 - Tue, Apr 20

1:21 pm - 8:40 amSTL Lambert-St Louis-DUB Dublin

13h 19m1 stop Philadelphia

11:30 am - 9:41 pmDUB Dublin-STL Lambert-St Louis

16h 11m2 stops Philadelphia Washington, D.C. Reagan-National

$759American Airlines

Tue, Dec 1 - Tue, Dec 8

Cheap last minute flights

Enter your travel dates to find the best prices.

3:35 pm - 7:55 amSTL Lambert-St Louis-DUB Dublin

10h 20m1 stop Minneapolis St Paul

5:45 am - 11:54 pmDUB Dublin-STL Lambert-St Louis

23h 09m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$940Delta

Tue, Oct 20 - Tue, Oct 27

10:14 am - 10:00 amSTL Lambert-St Louis-DUB Dublin

17h 46m2 stops Atlanta Hartsfield-Jackson New York John F Kennedy Intl

1:25 pm - 9:09 amDUB Dublin-STL Lambert-St Louis

24h 44m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$944Delta

Tue, Oct 20 - Tue, Oct 27

9:35 pm - 5:00 pmSTL Lambert-St Louis-DUB Dublin

13h 25m1 stop London Heathrow

8:50 am - 12:19 amDUB Dublin-STL Lambert-St Louis

20h 29m2 stops London Heathrow Chicago O'Hare Intl

$960British Airways

Tue, Oct 20 - Tue, Oct 27

12:20 pm - 7:30 amSTL Lambert-St Louis-DUB Dublin

13h 10m1 stop Newark

1:35 pm - 9:52 pmDUB Dublin-STL Lambert-St Louis

13h 17m1 stop Newark

$967United Airlines

Tue, Oct 20 - Tue, Oct 27

5:36 pm - 9:45 amSTL Lambert-St Louis-DUB Dublin

10h 09m1 stop Chicago O'Hare Intl

12:05 pm - 7:30 pmDUB Dublin-STL Lambert-St Louis

12h 25m1 stop Washington, D.C. Dulles Intl

$967United Airlines

Tue, Oct 20 - Tue, Oct 27

11:35 am - 8:15 amSTL Lambert-St Louis-DUB Dublin

14h 40m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:10 am - 3:23 pmDUB Dublin-STL Lambert-St Louis

35h 13m2 stops Frankfurt am Main Toronto Pearson Intl

$968Multiple Airlines

Tue, Oct 20 - Tue, Oct 27

11:21 am - 8:15 amSTL Lambert-St Louis-DUB Dublin

14h 54m1 stop Philadelphia

11:35 am - 8:57 pmDUB Dublin-STL Lambert-St Louis

15h 22m1 stop Chicago O'Hare Intl

$1,007Aer Lingus

Mon, Oct 19 - Thu, Oct 22

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

14h 59m1 stop Dallas/Fort Worth

9:30 am - 5:00 pmDUB Dublin-STL Lambert-St Louis

13h 30m1 stop Philadelphia

$1,058American Airlines

Thu, Oct 15 - Sun, Oct 18

5:27 pm - 10:35 amSTL Lambert-St Louis-DUB Dublin

11h 08m1 stop Chicago O'Hare Intl

1:20 pm - 8:20 pmDUB Dublin-STL Lambert-St Louis

13h 00m1 stop Toronto Pearson Intl

$1,074Aer Lingus

Mon, Oct 19 - Thu, Oct 22

1:06 pm - 12:05 pmSTL Lambert-St Louis-DUB Dublin

40h 59m3 stops Chicago O'Hare Intl Hong Kong Intl London Heathrow

1:25 pm - 10:00 pmDUB Dublin-STL Lambert-St Louis

37h 35m3 stops London Heathrow Hong Kong Intl Dallas/Fort Worth

$13,383Multiple Airlines

Tue, Oct 20 - Tue, Oct 27

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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

Feb 15

STL5:00 amLambert-St Louis

21h 10m

1 stop

DUB8:10 amDublin

Feb 18

DUB9:00 amDublin

36h 57m

2 stops

STL3:57 pmLambert-St Louis

$680

United Airlines

Jan 11

STL5:02 amLambert-St Louis

21h 08m

1 stop

DUB8:10 amDublin

Jan 14

DUB9:00 amDublin

35h 28m

2 stops

STL2:28 pmLambert-St Louis

$685

United Airlines

Jan 11

STL9:05 amLambert-St Louis

17h 05m

1 stop

DUB8:10 amDublin

Jan 14

DUB9:00 amDublin

12h 26m

1 stop

STL3:26 pmLambert-St Louis

$698

American Airlines flights from St. Louis to Ireland

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

American Airlines

Feb 9

STL2:11 pmLambert-St Louis

13h 29m

2 stops

DUB9:40 amDublin

Feb 25

DUB11:30 amDublin

15h 39m

1 stop

STL9:09 pmLambert-St Louis

$704

American Airlines

Oct 24

STL10:12 amLambert-St Louis

15h 58m

1 stop

DUB8:10 amDublin

Nov 1

DUB11:30 amDublin

14h 56m

1 stop

STL8:26 pmLambert-St Louis

$904

American Airlines

Nov 27

STL5:29 pmLambert-St Louis

16h 16m

2 stops

SNN3:45 pmShannon

Dec 4

SNN2:00 pmShannon

15h 59m

2 stops

STL11:59 pmLambert-St Louis

$1,042

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 2/15

5:00 am-8:10 am

1 stop21h 10m

Dublin

Thu 2/18

9:00 am-3:57 pm

2 stops36h 57m

$680

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 3/17

7:00 am-6:10 am

2 stops18h 10m

Dublin

Wed 3/24

5:10 am-2:45 pm

1 stop14h 35m

$683

Quickest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 2/10

3:40 pm-11:00 am

1 stop13h 20m

Dublin

Thu 2/18

9:00 am-3:26 pm

1 stop12h 26m

$684

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sat 3/20

7:04 pm-8:10 am

1 stop32h 06m

Dublin

Fri 3/26

8:00 am-10:06 pm

2 stops43h 06m

$685

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Wed 3/17

4:40 pm-4:30 pm

1 stop18h 50m

Dublin

Wed 3/24

5:10 am-2:45 pm

1 stop14h 35m

$689

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 4/5

4:10 pm-8:15 am

1 stop10h 05m

Dublin

Wed 4/14

9:50 am-10:27 am

2 stops30h 37m

$693

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 3/8

6:00 am-7:10 am

2 stops19h 10m

Dublin

Tue 3/23

8:00 am-3:02 pm

2 stops36h 02m

$693

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 2/9

2:11 pm-9:40 am

2 stops13h 29m

Dublin

Thu 2/25

11:30 am-9:09 pm

1 stop15h 39m

$704

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sat 4/10

6:45 pm-4:55 pm

2 stops40h 10m

Dublin

Tue 4/20

5:55 am-1:25 pm

1 stop13h 30m

$718

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/1

1:21 pm-8:40 am

1 stop13h 19m

Dublin

Tue 12/8

11:30 am-9:41 pm

2 stops16h 11m

$759

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 $431. 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 $523.

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 $749 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 $482 on momondo.

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

You could potentially save up to 76% 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	$319
Fastest flight time	10h 27m
Direct flights	None

The best one-way flight to Ireland from St. Louis in the past 72 hours is $319. The best round-trip flight deal from St. Louis to Ireland found on momondo in the last 72 hours is $680.

The fastest flight from St. Louis to Ireland takes 10h 27m

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 October 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 1,830 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,262 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,278 reviews	Search Lufthansa flights
Air Canada	PriceFrom $474	Free Cancellation	Rating 7.1 11,770 reviews	Search Air Canada flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.0 12,167 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,650 reviews	Search Delta flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,363 reviews	Search United Airlines flights
KLM	PriceFrom $538	Free Cancellation	Rating 7.8 1,587 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 $400

Flights to Shannon, Clarefrom $567

Flights to Corkfrom $491

Flights to Knockfrom $781

Flights to Milltown (Kerry)from $565

Flights to Donegalfrom $1,015

Cheap flights from St. Louis to Ireland from $319

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 2/24. 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

American Airlines flights from St. Louis to Ireland

Our best American 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