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Cheap flights from St. Louis to Ireland from $353

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 1/6. 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.
Lufthansa Logo
11:22 am - 7:30 am
STL
-
DUB
14h 08m1 stop
Lufthansa Logo
10:40 am - 10:58 pm
DUB
-
STL
18h 18m1 stop
$379Lufthansa
Tue, Jan 13 - Tue, Jan 20
Austrian Airlines Logo
11:22 am - 7:30 am
STL
-
DUB
14h 08m1 stop
Austrian Airlines Logo
9:30 am - 11:59 pm
DUB
-
STL
20h 29m1 stop
$382Austrian Airlines
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
10:00 pm - 4:10 pm
STL
-
SNN
12h 10m1 stop
American Airlines Logo
9:15 pm - 7:30 pm
SNN
-
STL
28h 15m1 stop
$419American Airlines
Tue, May 5 - Tue, May 12
United Airlines Logo
7:45 am - 9:45 am
STL
-
DUB
20h 00m1 stop
United Airlines Logo
9:50 am - 7:30 pm
DUB
-
STL
15h 40m1 stop
$422United Airlines
Tue, Apr 28 - Thu, May 7
American Airlines Logo
2:19 pm - 11:20 am
STL
-
SNN
15h 01m2 stops
American Airlines Logo
7:40 am - 7:30 pm
SNN
-
STL
17h 50m1 stop
$424American Airlines
Tue, May 5 - Tue, May 12
Air Canada Logo
9:57 am - 7:10 am
STL
-
DUB
15h 13m2 stops
Air Canada Logo
9:00 am - 3:29 pm
DUB
-
STL
12h 29m1 stop
$425Air Canada
Tue, Jan 13 - Wed, Jan 21
United Airlines Logo
10:00 am - 7:20 am
STL
-
DUB
15h 20m2 stops
United Airlines Logo
9:50 am - 3:24 pm
DUB
-
STL
11h 34m1 stop
$427United Airlines
Wed, Apr 8 - Thu, Apr 16
Delta Logo
10:13 am - 10:45 am
STL
-
ORK
18h 32m2 stops
Delta Logo
6:00 am - 11:15 pm
ORK
-
STL
22h 15m2 stops
$481Delta
Wed, Mar 4 - Tue, Mar 10
Delta Logo
9:45 am - 10:45 am
STL
-
ORK
19h 00m2 stops
Delta Logo
6:00 am - 5:53 pm
ORK
-
STL
16h 53m2 stops
$530Delta
Wed, Mar 4 - Mon, Mar 9
Air Canada Logo
4:05 pm - 11:25 pm
STL
-
ORK
25h 20m2 stops
Air Canada Logo
7:40 am - 9:00 pm
ORK
-
STL
18h 20m3 stops
$739Air Canada
Thu, Mar 5 - Mon, Mar 9

Lufthansa flights from St. Louis to Ireland

Our best Lufthansa deals on St. Louis to Ireland flight tickets
Lufthansa
Jan 13
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Jan 20
DUB10:40 amDublin
18h 18m
1 stop
STL10:58 pmLambert-St Louis
$379
Find similar
Lufthansa
Dec 6
STL1:00 pmLambert-St Louis
13h 10m
1 stop
DUB8:10 amDublin
Dec 13
DUB12:05 pmDublin
13h 08m
1 stop
STL7:13 pmLambert-St Louis
$429
Find similar
Lufthansa
Jan 13
STL11:22 amLambert-St Louis
14h 08m
1 stop
DUB7:30 amDublin
Jan 21
DUB10:40 amDublin
18h 18m
1 stop
STL10:58 pmLambert-St Louis
$430
Find similar

British Airways flights from St. Louis to Ireland

Our best British Airways deals on St. Louis to Ireland flight tickets
British Airways
Jan 13
STL3:20 pmLambert-St Louis
17h 00m
2 stops
DUB2:20 pmDublin
Jan 20
DUB8:50 amDublin
16h 39m
2 stops
STL7:29 pmLambert-St Louis
$413
Find similar
British Airways
Jan 8
STL2:54 pmLambert-St Louis
17h 56m
2 stops
DUB2:50 pmDublin
Jan 29
DUB8:50 amDublin
16h 39m
2 stops
STL7:29 pmLambert-St Louis
$461
Find similar
British Airways
Jan 9
STL2:54 pmLambert-St Louis
17h 26m
2 stops
DUB2:20 pmDublin
Jan 20
DUB8:40 pmDublin
30h 35m
2 stops
STL9:15 pmLambert-St Louis
$466
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 December 4, 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

Tue 1/13

11:22 am-7:30 am

1 stop14h 08m

Dublin

Tue 1/20

10:40 am-10:58 pm

1 stop18h 18m

$379

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 1/13

11:22 am-7:30 am

1 stop14h 08m

Dublin

Tue 1/20

9:30 am-11:59 pm

1 stop20h 29m

$382

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

10:00 pm-4:10 pm

1 stop12h 10m

Shannon

Tue 5/12

9:15 pm-7:30 pm

1 stop28h 15m

$419

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 4/28

7:45 am-9:45 am

1 stop20h 00m

Dublin

Thu 5/7

9:50 am-7:30 pm

1 stop15h 40m

$422

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

2:19 pm-11:20 am

2 stops15h 01m

Shannon

Tue 5/12

7:40 am-7:30 pm

1 stop17h 50m

$424

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 1/13

9:57 am-7:10 am

2 stops15h 13m

Dublin

Wed 1/21

9:00 am-3:29 pm

1 stop12h 29m

$425

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 4/8

10:00 am-7:20 am

2 stops15h 20m

Dublin

Thu 4/16

9:50 am-3:24 pm

1 stop11h 34m

$427

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/4

10:13 am-10:45 am

2 stops18h 32m

Cork

Tue 3/10

6:00 am-11:15 pm

2 stops22h 15m

$481

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/4

9:45 am-10:45 am

2 stops19h 00m

Cork

Mon 3/9

6:00 am-5:53 pm

2 stops16h 53m

$530

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Thu 3/5

4:05 pm-11:25 pm

2 stops25h 20m

Cork

Mon 3/9

7:40 am-9:00 pm

3 stops18h 20m

$739

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 $843 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 $615 on momondo.

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

You could potentially save up to 16% 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 10m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 10m
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
1,430 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,500 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,562 reviews
Search British Airways flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,040 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,011 reviews
Search Delta flights
United AirlinesPriceFrom $507Free CancellationRating
7.4
9,066 reviews
Search United Airlines flights
LufthansaPriceFrom $517Free CancellationRating
6.8
7,612 reviews
Search Lufthansa flights
American AirlinesPriceFrom $548Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
Aer LingusPriceFrom $750Free CancellationRating
7.2
1,384 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

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.
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Find better results for your trip to Ireland

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