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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 2/22. 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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0 bags

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Find the cheapest flights from St. Louis to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Austrian Airlines Logo
11:50 am - 7:30 amSTL-DUB
13h 40m1 stop
Austrian Airlines Logo
9:30 am - 11:57 pmDUB-STL
20h 27m1 stop
$392Austrian Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 24
Austrian Airlines Logo
11:50 am - 7:30 amSTL-DUB
13h 40m1 stop
Austrian Airlines Logo
9:30 am - 11:42 pmDUB-STL
20h 12m1 stop
$430Austrian Airlines
Find Deal
Tue, Dec 9 - Tue, Dec 16
Lufthansa Logo
11:50 am - 7:30 amSTL-DUB
13h 40m1 stop
Lufthansa Logo
10:40 am - 5:03 pmDUB-STL
12h 23m1 stop
$431Lufthansa
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
8:00 am - 8:10 amSTL-DUB
18h 10m1 stop
United Airlines Logo
9:00 am - 4:28 pmDUB-STL
37h 28m2 stops
$455United Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
United Airlines Logo
3:19 pm - 10:20 amSTL-DUB
13h 01m2 stops
United Airlines Logo
9:00 am - 9:58 pmDUB-STL
42h 58m2 stops
$460United Airlines
Find Deal
Fri, Dec 5 - Wed, Dec 10
Air Canada Logo
6:42 pm - 7:10 amSTL-DUB
30h 28m2 stops
Air Canada Logo
9:00 am - 2:23 pmDUB-STL
35h 23m2 stops
$462Air Canada
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
11:40 am - 7:45 amSTL-DUB
14h 05m1 stop
Delta Logo
10:45 am - 8:47 pmDUB-STL
16h 02m2 stops
$463Delta
Find Deal
Fri, Dec 5 - Tue, Dec 9
Delta Logo
5:56 pm - 2:45 pmSTL-ORK
38h 49m2 stops
Delta Logo
1:25 pm - 8:37 pmORK-STL
37h 12m2 stops
$490Delta
Find Deal
Wed, Jan 28 - Sun, Feb 1
American Airlines Logo
5:59 pm - 3:25 pmSTL-ORK
16h 26m2 stops
American Airlines Logo
7:20 am - 7:02 pmORK-STL
17h 42m2 stops
$563American Airlines
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Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
2:21 pm - 11:10 amSTL-ORK
15h 49m2 stops
American Airlines Logo
7:20 am - 7:02 pmORK-STL
17h 42m2 stops
$583American Airlines
Find Deal
Wed, Mar 25 - Sat, Apr 4

British Airways flights from St. Louis to Ireland

Our best British Airways deals on St. Louis to Ireland flight tickets
British Airways
Apr 8
STL4:39 pmLambert-St Louis
13h 16m
2 stops
DUB11:55 amDublin
Apr 16
DUB10:40 amDublin
17h 08m
2 stops
STL9:48 pmLambert-St Louis
$535
Find similar
British Airways
Feb 22
STL10:03 amLambert-St Louis
17h 47m
2 stops
DUB9:50 amDublin
Feb 28
DUB8:40 pmDublin
27h 23m
2 stops
STL6:03 pmLambert-St Louis
$565
Find similar
British Airways
Jan 3
STL11:41 amLambert-St Louis
17h 29m
2 stops
ORK11:10 amCork
Jan 10
ORK7:40 amCork
21h 19m
2 stops
STL10:59 pmLambert-St Louis
$686
Find similar

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Dec 4
STL8:00 amLambert-St Louis
18h 10m
1 stop
DUB8:10 amDublin
Dec 8
DUB9:00 amDublin
37h 28m
2 stops
STL4:28 pmLambert-St Louis
$455
Find similar
United Airlines
Dec 5
STL3:19 pmLambert-St Louis
13h 01m
2 stops
DUB10:20 amDublin
Dec 10
DUB9:00 amDublin
42h 58m
2 stops
STL9:58 pmLambert-St Louis
$460
Find similar
United Airlines
Jan 7
STL8:05 amLambert-St Louis
18h 05m
1 stop
DUB8:10 amDublin
Jan 21
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$464
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from St. Louis to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 12/10

11:50 am-7:30 am

1 stop13h 40m

Dublin

Wed 12/24

9:30 am-11:57 pm

1 stop20h 27m

$392

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 12/9

11:50 am-7:30 am

1 stop13h 40m

Dublin

Tue 12/16

9:30 am-11:42 pm

1 stop20h 12m

$430

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 12/3

11:50 am-7:30 am

1 stop13h 40m

Dublin

Wed 12/10

10:40 am-5:03 pm

1 stop12h 23m

$431

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Thu 12/4

8:00 am-8:10 am

1 stop18h 10m

Dublin

Mon 12/8

9:00 am-4:28 pm

2 stops37h 28m

$455

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 12/5

3:19 pm-10:20 am

2 stops13h 01m

Dublin

Wed 12/10

9:00 am-9:58 pm

2 stops42h 58m

$460

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 12/3

6:42 pm-7:10 am

2 stops30h 28m

Dublin

Sun 12/7

9:00 am-2:23 pm

2 stops35h 23m

$462

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Fri 12/5

11:40 am-7:45 am

1 stop14h 05m

Dublin

Tue 12/9

10:45 am-8:47 pm

2 stops16h 02m

$463

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 1/28

5:56 pm-2:45 pm

2 stops38h 49m

Cork

Sun 2/1

1:25 pm-8:37 pm

2 stops37h 12m

$490

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

5:59 pm-3:25 pm

2 stops16h 26m

Cork

Sat 4/4

7:20 am-7:02 pm

2 stops17h 42m

$563

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

2:21 pm-11:10 am

2 stops15h 49m

Cork

Sat 4/4

7:20 am-7:02 pm

2 stops17h 42m

$583

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ireland from

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

What is the cheapest month to fly to Ireland?

In general, November 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 $600. If you aren’t able to travel to Ireland during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $702.

What is the cheapest day to depart on your flight to Ireland?

The cheapest day to depart on your flight to Ireland is on a Wednesday when prices can be found for as low as $865. This is often the case because there is less demand to fly during this day of the week. Flights from St. Louis to Ireland on a Saturday will generally be more expensive and average around $972. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ireland?

According to our data, the cheapest time of day to fly to Ireland is in the evening. momondo users have found flights departing from St. Louis to Ireland in the evening for as low as $556. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is at noon when prices are around $1,057.

How far in advance should I book a flight 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 $850 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 $622 on momondo.

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

You could potentially save up to 19% 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

Direct flights

None
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
Search flight deals

  • 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?

  • 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
KLMPriceFrom $412Free CancellationRating
7.7
1,412 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,462 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,534 reviews
Search British Airways flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,027 reviews
Search Iberia flights
United AirlinesPriceFrom $507Free CancellationRating
7.4
9,027 reviews
Search United Airlines flights
LufthansaPriceFrom $526Free CancellationRating
6.8
7,579 reviews
Search Lufthansa flights
DeltaPriceFrom $532Free CancellationRating
7.9
8,002 reviews
Search Delta flights
American AirlinesPriceFrom $560Free CancellationRating
7.2
11,045 reviews
Search American Airlines flights
Aer LingusPriceFrom $736Free CancellationRating
7.2
1,377 reviews
Search Aer Lingus 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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Find better results for your trip to Ireland

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