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Cheap flights from St. Louis to Ireland from $390

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 6/10. 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

Discover deals from 900+ travel sites with momondo.

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
$662Multiple 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
$664Multiple 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
$667Multiple 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
$668Multiple 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
5:00 am - 7:45 am
STL
-
DUB
20h 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
9:16 am - 7:45 am
STL
-
DUB
16h 29m
2 stops
Air Canada Logo
9:20 am - 6:41 pm
DUB
-
STL
15h 21m
1 stop
$691Air Canada
Wed, Sep 9 - Thu, Sep 17
Delta Logo
2:18 pm - 2:40 pm
STL
-
ORK
18h 22m
2 stops
Delta Logo
6:15 am - 11:37 pm
ORK
-
STL
23h 22m
2 stops
$855Delta
Sun, Aug 23 - Wed, Sep 9
British Airways Logo
9:40 pm - 3:10 pm
STL
-
ORK
11h 30m
1 stop
British Airways Logo
11:25 am - 7:30 pm
ORK
-
STL
14h 05m
1 stop
$986British Airways
Sun, Aug 23 - Wed, Sep 9
British Airways Logo
9:40 pm - 7:50 pm
STL
-
ORK
16h 10m
1 stop
British Airways Logo
7:10 am - 6:58 pm
ORK
-
STL
17h 48m
2 stops
$996British Airways
Sun, Aug 23 - Wed, Sep 9

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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
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
STL5:00 amLambert-St Louis
20h 45m
2 stops
DUB7:45 amDublin
Sep 15
DUB9:50 amDublin
32h 23m
2 stops
STL12:13 pmLambert-St Louis
$687
United Airlines
Sep 1
STL7:01 amLambert-St Louis
18h 29m
1 stop
DUB7:30 amDublin
Sep 10
DUB9:50 amDublin
16h 10m
1 stop
STL8:00 pmLambert-St Louis
$697

Delta flights from St. Louis to Ireland

Our best Delta deals on St. Louis to Ireland flight tickets
Delta
Sep 6
STL3:42 pmLambert-St Louis
12h 18m
2 stops
DUB10:00 amDublin
Sep 19
DUB5:55 amDublin
17h 00m
2 stops
STL4:55 pmLambert-St Louis
$762
Delta
Aug 23
STL2:18 pmLambert-St Louis
18h 22m
2 stops
ORK2:40 pmCork
Sep 9
ORK6:15 amCork
23h 22m
2 stops
STL11:37 pmLambert-St Louis
$855
Delta
May 5
STL1:02 pmLambert-St Louis
19h 38m
2 stops
ORK2:40 pmCork
May 21
ORK6:15 amCork
23h 44m
2 stops
STL11:59 pmLambert-St Louis
$993

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 28, 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

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

$662

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

$664

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

$667

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

$668

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

5:00 am-7:45 am

2 stops20h 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

9:16 am-7:45 am

2 stops16h 29m

Dublin

Thu 9/17

9:20 am-6:41 pm

1 stop15h 21m

$691

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

2:18 pm-2:40 pm

2 stops18h 22m

Cork

Wed 9/9

6:15 am-11:37 pm

2 stops23h 22m

$855
Quickest round-trip

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-3:10 pm

1 stop11h 30m

Cork

Wed 9/9

11:25 am-7:30 pm

1 stop14h 05m

$986

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

9:40 pm-7:50 pm

1 stop16h 10m

Cork

Wed 9/9

7:10 am-6:58 pm

2 stops17h 48m

$996

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, February 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 $385. If you aren’t able to travel to Ireland during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $396.

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 $733 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 20% 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

11h 27m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 11h 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?

  • 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
1,508 reviews
Search KLM flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,929 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
7,956 reviews
Search Lufthansa flights
Air CanadaPriceFrom $456Free CancellationRating
7.1
10,975 reviews
Search Air Canada flights
United AirlinesPriceFrom $462Free CancellationRating
7.4
9,672 reviews
Search United Airlines flights
IberiaPriceFrom $466Free CancellationRating
7.0
3,202 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,466 reviews
Search Delta flights
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,676 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.3
1,535 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.

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