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 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.

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

Aer Lingus, United Airlines, and Delta 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 8 as of August 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.

4:05 pm - 5:10 amSTL Lambert-St Louis-DUB Dublin

31h 05m1 stop Toronto Pearson Intl

1:00 pm - 3:26 pmDUB Dublin-STL Lambert-St Louis

32h 26m1 stop Toronto Pearson Intl

$329Aer Lingus

Mon, Jan 11 - Thu, Jan 21

4:05 pm - 5:10 amSTL Lambert-St Louis-DUB Dublin

32h 05m1 stop Toronto Pearson Intl

1:00 pm - 3:26 pmDUB Dublin-STL Lambert-St Louis

32h 26m1 stop Toronto Pearson Intl

$338Aer Lingus

Mon, Oct 26 - Wed, Nov 4

6:30 am - 7:30 amSTL Lambert-St Louis-DUB Dublin

19h 00m1 stop Newark

9:00 am - 12:06 pmDUB Dublin-STL Lambert-St Louis

33h 06m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$679United Airlines

Tue, Dec 1 - Tue, Dec 15

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

18h 00m1 stop Newark

9:00 am - 12:06 pmDUB Dublin-STL Lambert-St Louis

33h 06m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$679United Airlines

Tue, Dec 8 - Tue, Dec 15

4:05 pm - 11:20 amSTL Lambert-St Louis-DUB Dublin

37h 15m2 stops Toronto Pearson Intl Zurich

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

12h 26m1 stop Toronto Pearson Intl

$683Multiple Airlines

Tue, Dec 1 - Tue, Dec 15

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

30h 06m2 stops Chicago O'Hare Intl Toronto Pearson Intl

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

14h 35m1 stop Frankfurt am Main

$684Multiple Airlines

Sat, Jan 9 - Fri, Feb 12

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

30h 06m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:00 am - 12:06 pmDUB Dublin-STL Lambert-St Louis

33h 06m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$687Air Canada

Tue, Dec 1 - Tue, Dec 15

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

30h 06m2 stops Chicago O'Hare Intl Toronto Pearson Intl

9:00 am - 12:06 pmDUB Dublin-STL Lambert-St Louis

33h 06m2 stops Toronto Pearson Intl Chicago O'Hare Intl

$687Air Canada

Tue, Dec 8 - Tue, Dec 15

6:50 pm - 5:10 pmSTL Lambert-St Louis-DUB Dublin

17h 20m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

14h 35m1 stop Frankfurt am Main

$696Lufthansa

Sun, Oct 25 - Fri, Nov 6

6:50 pm - 5:10 pmSTL Lambert-St Louis-DUB Dublin

17h 20m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

5:10 am - 10:00 pmDUB Dublin-STL Lambert-St Louis

22h 50m2 stops Frankfurt am Main Newark

$703Lufthansa

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

8:50 am - 1:25 pmDUB Dublin-STL Lambert-St Louis

34h 35m1 stop Frankfurt am Main

$969Multiple Airlines

Fri, Aug 21 - Sun, Aug 23

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

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

8:50 am - 1:25 pmDUB Dublin-STL Lambert-St Louis

34h 35m1 stop Frankfurt am Main

$977Multiple Airlines

Fri, Aug 21 - Sun, Aug 23

10:53 am - 7:20 amSTL Lambert-St Louis-DUB Dublin

14h 27m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

12:30 pm - 9:17 pmDUB Dublin-STL Lambert-St Louis

14h 47m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

$1,002United Airlines

Fri, Aug 21 - Sun, Aug 23

3:30 pm - 9:45 pmSTL Lambert-St Louis-DUB Dublin

24h 15m2 stops Frankfurt am Main Amsterdam Schiphol

6:15 am - 8:24 pmDUB Dublin-STL Lambert-St Louis

20h 09m3 stops Amsterdam Schiphol Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

$1,597Multiple Airlines

Fri, Aug 21 - Sun, Aug 23

2:00 pm - 1:15 pmSTL Lambert-St Louis-DUB Dublin

17h 15m3 stops Jonesboro Nashville Intl Reykjavik Keflavik Intl

7:05 pm - 8:24 pmDUB Dublin-STL Lambert-St Louis

31h 19m3 stops Stuttgart Echterdingen Budapest Ferenc Liszt Intl Toronto Pearson Intl

$1,895Multiple Airlines

Fri, Aug 21 - Sun, Aug 23

9:32 am - 5:10 amSTL Lambert-St Louis-DUB Dublin

13h 38m1 stop Chicago O'Hare Intl

4:45 pm - 11:58 pmDUB Dublin-STL Lambert-St Louis

13h 13m1 stop Chicago O'Hare Intl

$3,940Aer Lingus

Fri, Aug 21 - Sat, Sep 5

4:15 pm - 11:05 amSTL Lambert-St Louis-DUB Dublin

12h 50m2 stops Raleigh-Durham Reykjavik Keflavik Intl

2:15 pm - 9:10 pmDUB Dublin-STL Lambert-St Louis

36h 55m2 stops Reykjavik Keflavik Intl Denver Intl

$5,539Multiple Airlines

Sat, Aug 22 - Mon, Aug 24

8:55 am - 5:10 amSTL Lambert-St Louis-DUB Dublin

14h 15m1 stop Toronto Pearson Intl

1:20 pm - 2:02 pmDUB Dublin-STL Lambert-St Louis

30h 42m1 stop Toronto Pearson Intl

$5,704Aer Lingus

Sat, Aug 22 - Mon, Aug 24

1:25 pm - 11:05 amSTL Lambert-St Louis-DUB Dublin

15h 40m3 stops Savannah/Hilton Head Baltimore/Washington Reykjavik Keflavik Intl

2:15 pm - 9:10 pmDUB Dublin-STL Lambert-St Louis

36h 55m2 stops Reykjavik Keflavik Intl Denver Intl

$5,956Multiple Airlines

Sat, Aug 22 - Mon, Aug 24

4:15 pm - 1:15 pmSTL Lambert-St Louis-DUB Dublin

15h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

2:15 pm - 9:45 pmDUB Dublin-STL Lambert-St Louis

37h 30m2 stops Reykjavik Keflavik Intl Denver Intl

$6,006Multiple Airlines

Fri, Aug 21 - Sat, Sep 5

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Aer Lingus flights from St. Louis to Ireland

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

Aer Lingus

Jan 11

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Jan 21

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$329

Aer Lingus

Jan 9

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Feb 12

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$338

Aer Lingus

Jan 11

STL4:05 pmLambert-St Louis

31h 05m

1 stop

DUB5:10 amDublin

Jan 21

DUB1:00 pmDublin

32h 26m

1 stop

STL3:26 pmLambert-St Louis

$339

United Airlines flights from St. Louis to Ireland

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

United Airlines

Dec 8

STL7:30 amLambert-St Louis

18h 00m

1 stop

DUB7:30 amDublin

Dec 15

DUB9:00 amDublin

33h 06m

2 stops

STL12:06 pmLambert-St Louis

$679

United Airlines

Sep 1

STL7:00 amLambert-St Louis

18h 30m

1 stop

DUB7:30 amDublin

Sep 8

DUB9:20 amDublin

36h 18m

2 stops

STL3:38 pmLambert-St Louis

$866

United Airlines

Oct 3

STL9:30 amLambert-St Louis

18h 45m

1 stop

SNN10:15 amShannon

Oct 10

SNN12:30 pmShannon

15h 07m

1 stop

STL9:37 pmLambert-St Louis

$868

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 1/11

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Thu 1/21

1:00 pm-3:26 pm

1 stop32h 26m

$329

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Mon 10/26

4:05 pm-5:10 am

1 stop32h 05m

Dublin

Wed 11/4

1:00 pm-3:26 pm

1 stop32h 26m

$338

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/1

6:30 am-7:30 am

1 stop19h 00m

Dublin

Tue 12/15

9:00 am-12:06 pm

2 stops33h 06m

$679

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

7:30 am-7:30 am

1 stop18h 00m

Dublin

Tue 12/15

9:00 am-12:06 pm

2 stops33h 06m

$679

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/1

4:05 pm-11:20 am

2 stops37h 15m

Dublin

Tue 12/15

9:00 am-3:26 pm

1 stop12h 26m

$683

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sat 1/9

7:04 pm-7:10 am

2 stops30h 06m

Dublin

Fri 2/12

5:10 am-1:45 pm

1 stop14h 35m

$684

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/1

7:04 pm-7:10 am

2 stops30h 06m

Dublin

Tue 12/15

9:00 am-12:06 pm

2 stops33h 06m

$687

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Tue 12/8

7:04 pm-7:10 am

2 stops30h 06m

Dublin

Tue 12/15

9:00 am-12:06 pm

2 stops33h 06m

$687

Quickest round-trip

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/25

6:50 pm-5:10 pm

2 stops17h 20m

Dublin

Fri 11/6

5:10 am-1:45 pm

1 stop14h 35m

$696

St. LouisDublin

STL Lambert-St Louis - DUB Dublin

STLDUB

Lambert-St Louis

Sun 10/25

6:50 pm-5:10 pm

2 stops17h 20m

Dublin

Fri 11/6

5:10 am-10:00 pm

2 stops22h 50m

$703

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 $456. 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 $504.

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 $714 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 $568 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

Best Price Found	$225
Fastest flight time	10h 15m
Direct flights	None

The best one-way flight to Ireland from St. Louis in the past 72 hours is $225. The best round-trip flight deal from St. Louis to Ireland found on momondo in the last 72 hours is $329.

The fastest flight from St. Louis to Ireland takes 10h 15m

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 August 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 1,711 reviews	Search Aer Lingus flights
British Airways	PriceFrom $429	Free Cancellation	Rating 6.7 8,179 reviews	Search British Airways flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 8,202 reviews	Search Lufthansa flights
American Airlines	PriceFrom $482	Free Cancellation	Rating 7.1 11,966 reviews	Search American Airlines flights
Delta	PriceFrom $484	Free Cancellation	Rating 7.8 8,501 reviews	Search Delta flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,105 reviews	Search United Airlines flights
Air Canada	PriceFrom $523	Free Cancellation	Rating 7.1 11,506 reviews	Search Air Canada flights
KLM	PriceFrom $532	Free Cancellation	Rating 7.8 1,560 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.

An easier way to manage your Ireland trip

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Popular cities

Other flights from St. Louis

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Complete your trip

Feeling lucky

Popular cities in Ireland

Flights to Dublinfrom $329

Flights to Shannon, Clarefrom $608

Flights to Corkfrom $631

Flights to Knockfrom $675

Flights to Milltown (Kerry)from $745

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 1/25. 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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Aer Lingus flights from St. Louis to Ireland

Our best Aer Lingus 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?

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