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Cheap flights from St. Louis to Ireland from $166

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 9/8. 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
1 adult, Economy, 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.
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:20 pm
DUB
-
STL
13h 00m
1 stop
$329Aer Lingus
Tue, Sep 8 - Tue, Sep 15
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:20 pm
DUB
-
STL
13h 00m
1 stop
$330Aer Lingus
Tue, Sep 8 - Tue, Sep 15
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 2:02 pm
DUB
-
STL
30h 42m
1 stop
$336Aer Lingus
Tue, Aug 11 - Wed, Aug 19
Aer Lingus Logo
4:05 pm - 5:10 am
STL
-
DUB
31h 05m
1 stop
Aer Lingus Logo
1:00 pm - 3:26 pm
DUB
-
STL
32h 26m
1 stop
$340Aer Lingus
Sun, Nov 15 - Tue, Nov 24
Aer Lingus Logo
8:55 am - 5:10 am
STL
-
DUB
14h 15m
1 stop
Aer Lingus Logo
1:20 pm - 8:24 pm
DUB
-
STL
13h 04m
1 stop
$344Aer Lingus
Sun, Aug 16 - Fri, Aug 28
United Airlines Logo
8:20 am - 10:15 am
STL
-
SNN
19h 55m
1 stop
United Airlines Logo
12:30 pm - 9:09 pm
SNN
-
STL
14h 39m
1 stop
$758United Airlines
Mon, Sep 21 - Thu, Oct 1
United Airlines Logo
12:59 pm - 10:15 am
STL
-
SNN
15h 16m
2 stops
United Airlines Logo
12:30 pm - 9:09 pm
SNN
-
STL
14h 39m
1 stop
$762United Airlines
Mon, Sep 21 - Thu, Oct 1
Delta Logo
12:52 pm - 2:40 pm
STL
-
ORK
19h 48m
2 stops
Delta Logo
6:15 am - 5:38 pm
ORK
-
STL
17h 23m
2 stops
$766Delta
Wed, Aug 12 - Wed, Aug 19
Delta Logo
6:20 am - 10:20 am
STL
-
ORK
22h 00m
2 stops
Delta Logo
6:15 am - 11:42 pm
ORK
-
STL
23h 27m
2 stops
$770Delta
Sun, Aug 23 - Wed, Sep 9
Multiple Airlines Logo
3:54 pm - 2:40 pm
STL
-
ORK
16h 46m
2 stops
Multiple Airlines Logo
6:15 am - 7:58 pm
ORK
-
STL
19h 43m
2 stops
$807Multiple Airlines
Wed, Sep 9 - Sat, Sep 19

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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
Sep 8
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 15
DUB1:20 pmDublin
13h 00m
1 stop
STL8:20 pmLambert-St Louis
$329
Aer Lingus
Sep 8
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Sep 15
DUB1:20 pmDublin
13h 00m
1 stop
STL8:20 pmLambert-St Louis
$330
Aer Lingus
Aug 11
STL8:55 amLambert-St Louis
14h 15m
1 stop
DUB5:10 amDublin
Aug 19
DUB1:20 pmDublin
30h 42m
1 stop
STL2:02 pmLambert-St Louis
$336

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Sep 21
STL8:20 amLambert-St Louis
19h 55m
1 stop
SNN10:15 amShannon
Oct 1
SNN12:30 pmShannon
14h 39m
1 stop
STL9:09 pmLambert-St Louis
$758
United Airlines
Sep 21
STL12:59 pmLambert-St Louis
15h 16m
2 stops
SNN10:15 amShannon
Oct 1
SNN12:30 pmShannon
14h 39m
1 stop
STL9:09 pmLambert-St Louis
$762
United Airlines
Aug 16
STL4:50 pmLambert-St Louis
11h 25m
1 stop
SNN10:15 amShannon
Aug 28
SNN9:30 amShannon
12h 08m
1 stop
STL3:38 pmLambert-St Louis
$779

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 July 16, 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

Tue 9/8

8:55 am-5:10 am

1 stop14h 15m

Dublin

Tue 9/15

1:20 pm-8:20 pm

1 stop13h 00m

$329

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 9/8

8:55 am-5:10 am

1 stop14h 15m

Dublin

Tue 9/15

1:20 pm-8:20 pm

1 stop13h 00m

$330

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 8/11

8:55 am-5:10 am

1 stop14h 15m

Dublin

Wed 8/19

1:20 pm-2:02 pm

1 stop30h 42m

$336

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 11/15

4:05 pm-5:10 am

1 stop31h 05m

Dublin

Tue 11/24

1:00 pm-3:26 pm

1 stop32h 26m

$340

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 8/16

8:55 am-5:10 am

1 stop14h 15m

Dublin

Fri 8/28

1:20 pm-8:24 pm

1 stop13h 04m

$344

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 9/21

8:20 am-10:15 am

1 stop19h 55m

Shannon

Thu 10/1

12:30 pm-9:09 pm

1 stop14h 39m

$758

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 9/21

12:59 pm-10:15 am

2 stops15h 16m

Shannon

Thu 10/1

12:30 pm-9:09 pm

1 stop14h 39m

$762

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 8/12

12:52 pm-2:40 pm

2 stops19h 48m

Cork

Wed 8/19

6:15 am-5:38 pm

2 stops17h 23m

$766

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Sun 8/23

6:20 am-10:20 am

2 stops22h 00m

Cork

Wed 9/9

6:15 am-11:42 pm

2 stops23h 27m

$770

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 9/9

3:54 pm-2:40 pm

2 stops16h 46m

Cork

Sat 9/19

6:15 am-7:58 pm

2 stops19h 43m

$807

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, 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 $322. If you aren’t able to travel to Ireland during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $348.

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 $767 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 $581 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

Fastest flight time

11h 25m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 11h 25m
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
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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
Aer LingusPriceFrom $325Free CancellationRating
7.3
1,668 reviews
Search Aer Lingus flights
KLMPriceFrom $412Free CancellationRating
7.8
1,539 reviews
Search KLM flights
Air CanadaPriceFrom $428Free CancellationRating
7.1
11,347 reviews
Search Air Canada flights
British AirwaysPriceFrom $429Free CancellationRating
6.7
8,120 reviews
Search British Airways flights
LufthansaPriceFrom $430Free CancellationRating
6.8
8,139 reviews
Search Lufthansa flights
United AirlinesPriceFrom $468Free CancellationRating
7.4
9,993 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,254 reviews
Search Iberia flights
DeltaPriceFrom $484Free CancellationRating
7.8
8,472 reviews
Search Delta flights
American AirlinesPriceFrom $488Free CancellationRating
7.1
11,816 reviews
Search American Airlines 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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