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Cheap flights from St. Louis to Ireland from $429

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 7/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
Multiple Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
6:00 am - 1:25 pm
DUB
-
STL
13h 25m
1 stop
$671Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
Multiple Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
6:00 am - 1:25 pm
DUB
-
STL
13h 25m
1 stop
$672Multiple Airlines
Wed, Sep 9 - Tue, Sep 15
United Airlines Logo
12:10 pm - 7:45 am
STL
-
DUB
13h 35m
1 stop
United Airlines Logo
9:50 am - 12:13 pm
DUB
-
STL
32h 23m
2 stops
$683United Airlines
Wed, Sep 9 - Tue, Sep 15
United Airlines Logo
6:00 am - 7:45 am
STL
-
DUB
19h 45m
2 stops
United Airlines Logo
9:50 am - 12:13 pm
DUB
-
STL
32h 23m
2 stops
$687United Airlines
Wed, Sep 9 - Tue, Sep 15
Air Canada Logo
5:00 am - 7:45 am
STL
-
DUB
20h 45m
2 stops
Air Canada Logo
9:20 am - 6:41 pm
DUB
-
STL
15h 21m
1 stop
$696Air Canada
Wed, Sep 9 - Tue, Sep 15
Air Canada Logo
9:16 am - 7:45 am
STL
-
DUB
16h 29m
2 stops
Air Canada Logo
9:20 am - 8:00 pm
DUB
-
STL
16h 40m
2 stops
$699Air Canada
Wed, Sep 9 - Tue, Sep 15
Delta Logo
9:00 am - 8:45 am
STL
-
DUB
17h 45m
1 stop
Delta Logo
5:55 am - 4:45 pm
DUB
-
STL
16h 50m
2 stops
$707Delta
Tue, Aug 11 - Wed, Aug 19
Delta Logo
10:45 am - 2:40 pm
STL
-
ORK
21h 55m
2 stops
Delta Logo
6:15 am - 11:37 pm
ORK
-
STL
23h 22m
2 stops
$710Delta
Sun, Aug 23 - Wed, Sep 9
Lufthansa Logo
1:10 pm - 4:30 pm
STL
-
ORK
21h 20m
2 stops
Lufthansa Logo
4:55 pm - 1:25 pm
ORK
-
STL
26h 30m
1 stop
$940Lufthansa
Wed, Apr 29 - Tue, Sep 15
Lufthansa Logo
3:30 pm - 4:30 pm
STL
-
ORK
19h 00m
1 stop
Lufthansa Logo
5:05 pm - 11:00 pm
ORK
-
STL
35h 55m
2 stops
$950Lufthansa
Sun, Aug 23 - Wed, Sep 9

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Sep 9
STL12:10 pmLambert-St Louis
13h 35m
1 stop
DUB7:45 amDublin
Sep 15
DUB9:50 amDublin
32h 23m
2 stops
STL12:13 pmLambert-St Louis
$683
United Airlines
Sep 9
STL6:00 amLambert-St Louis
19h 45m
2 stops
DUB7:45 amDublin
Sep 15
DUB9:50 amDublin
32h 23m
2 stops
STL12:13 pmLambert-St Louis
$687
United Airlines
Sep 9
STL12:10 pmLambert-St Louis
13h 35m
1 stop
DUB7:45 amDublin
Sep 15
DUB9:20 amDublin
15h 21m
1 stop
STL6:41 pmLambert-St Louis
$691

Delta flights from St. Louis to Ireland

Our best Delta deals on St. Louis to Ireland flight tickets
Delta
Aug 11
STL9:00 amLambert-St Louis
17h 45m
1 stop
DUB8:45 amDublin
Aug 19
DUB5:55 amDublin
16h 50m
2 stops
STL4:45 pmLambert-St Louis
$707
Delta
Aug 11
STL5:45 pmLambert-St Louis
10h 15m
1 stop
DUB10:00 amDublin
Aug 19
DUB10:00 amDublin
12h 49m
1 stop
STL4:49 pmLambert-St Louis
$710
Delta
Aug 11
STL9:00 amLambert-St Louis
19h 00m
2 stops
DUB10:00 amDublin
Aug 19
DUB5:55 amDublin
14h 36m
2 stops
STL2:31 pmLambert-St Louis
$712

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 April 13, 2026.
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

Cheapest round-trip
Quickest round-trip

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$671

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

6:00 am-1:25 pm

1 stop13h 25m

$672

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

12:10 pm-7:45 am

1 stop13h 35m

Dublin

Tue 9/15

9:50 am-12:13 pm

2 stops32h 23m

$683

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

6:00 am-7:45 am

2 stops19h 45m

Dublin

Tue 9/15

9:50 am-12:13 pm

2 stops32h 23m

$687

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

5:00 am-7:45 am

2 stops20h 45m

Dublin

Tue 9/15

9:20 am-6:41 pm

1 stop15h 21m

$696

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 9/9

9:16 am-7:45 am

2 stops16h 29m

Dublin

Tue 9/15

9:20 am-8:00 pm

2 stops16h 40m

$699

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

9:00 am-8:45 am

1 stop17h 45m

Dublin

Wed 8/19

5:55 am-4:45 pm

2 stops16h 50m

$707

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

10:45 am-2:40 pm

2 stops21h 55m

Cork

Wed 9/9

6:15 am-11:37 pm

2 stops23h 22m

$710

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 4/29

1:10 pm-4:30 pm

2 stops21h 20m

Cork

Tue 9/15

4:55 pm-1:25 pm

1 stop26h 30m

$940

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

3:30 pm-4:30 pm

1 stop19h 00m

Cork

Wed 9/9

5:05 pm-11:00 pm

2 stops35h 55m

$950

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, January 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 $523. If you aren’t able to travel to Ireland during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $543.

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 $728 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 $593 on momondo.

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

You could potentially save up to 51% 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

Fastest flight time

10h 04m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 04m
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?

  • 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
7.8
1,499 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,883 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,921 reviews
Search Lufthansa flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
10,922 reviews
Search Air Canada flights
United AirlinesPriceFrom $462Free CancellationRating
7.4
9,582 reviews
Search United Airlines flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,179 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,406 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,572 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.2
1,507 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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