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Cheap flights from St. Louis to Ireland from $386

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

Air Canada Logo
6:43 pm - 6:10 amSTL-DUB
30h 27m2 stops
Air Canada Logo
9:00 am - 2:25 pmDUB-STL
35h 25m2 stops
$472Air Canada
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Mon, Oct 27 - Wed, Nov 12
Air Canada Logo
6:43 pm - 6:10 amSTL-DUB
30h 27m2 stops
Air Canada Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$474Air Canada
Find Deal
Mon, Oct 27 - Wed, Nov 12
United Airlines Logo
5:58 pm - 9:55 amSTL-DUB
10h 57m1 stop
United Airlines Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$481United Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 12
United Airlines Logo
11:05 am - 8:10 amSTL-DUB
15h 05m1 stop
United Airlines Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$487United Airlines
Find Deal
Mon, Nov 17 - Wed, Nov 26
Lufthansa Logo
4:50 pm - 11:00 amSTL-DUB
13h 10m1 stop
Lufthansa Logo
5:10 am - 1:55 pmDUB-STL
14h 45m1 stop
$491Lufthansa
Find Deal
Wed, Oct 29 - Wed, Nov 5
American Airlines Logo
2:15 pm - 11:30 amSTL-SNN
16h 15m2 stops
American Airlines Logo
7:50 am - 11:07 pmSNN-STL
21h 17m2 stops
$519American Airlines
Find Deal
Tue, Oct 28 - Tue, Nov 4
Lufthansa Logo
3:50 pm - 11:00 amSTL-DUB
13h 10m1 stop
Lufthansa Logo
5:10 pm - 1:55 pmDUB-STL
26h 45m1 stop
$540Lufthansa
Find Deal
Wed, Nov 12 - Tue, Dec 2
American Airlines Logo
6:21 pm - 1:35 pmSTL-DUB
13h 14m2 stops
American Airlines Logo
11:30 am - 11:32 pmDUB-STL
18h 02m2 stops
$555American Airlines
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Wed, Feb 11 - Sat, Feb 28
Delta Logo
4:30 pm - 8:45 amSTL-DUB
10h 15m1 stop
Delta Logo
10:45 am - 5:25 pmDUB-STL
12h 40m1 stop
$592Delta
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Wed, Nov 12 - Sat, Dec 6
Delta Logo
6:00 am - 8:45 amSTL-DUB
20h 45m2 stops
Delta Logo
6:00 am - 5:09 pmDUB-STL
17h 09m2 stops
$616Delta
Find Deal
Sat, Nov 15 - Thu, Dec 4

Lufthansa flights from St. Louis to Ireland

Our best Lufthansa deals on St. Louis to Ireland flight tickets
Lufthansa
Oct 29
STL4:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Nov 5
DUB5:10 amDublin
14h 45m
1 stop
STL1:55 pmLambert-St Louis
$491
Find similar
Lufthansa
Nov 12
STL3:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Dec 2
DUB5:10 pmDublin
26h 45m
1 stop
STL1:55 pmLambert-St Louis
$540
Find similar
Lufthansa
Nov 5
STL3:50 pmLambert-St Louis
13h 10m
1 stop
DUB11:00 amDublin
Nov 9
DUB5:10 amDublin
14h 45m
1 stop
STL1:55 pmLambert-St Louis
$560
Find similar

Air France flights from St. Louis to Ireland

Our best Air France deals on St. Louis to Ireland flight tickets
Air France
Nov 15
STL5:12 pmLambert-St Louis
32h 33m
1 stop
DUB7:45 amDublin
Dec 4
DUB6:00 amDublin
17h 09m
2 stops
STL5:09 pmLambert-St Louis
$526
Find similar
Air France
Nov 14
STL4:30 pmLambert-St Louis
10h 15m
1 stop
DUB8:45 amDublin
Dec 4
DUB6:00 amDublin
17h 09m
2 stops
STL5:09 pmLambert-St Louis
$611
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 September 15, 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

Mon 10/27

6:43 pm-6:10 am

2 stops30h 27m

Dublin

Wed 11/12

9:00 am-2:25 pm

2 stops35h 25m

$472

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 10/27

6:43 pm-6:10 am

2 stops30h 27m

Dublin

Wed 11/12

9:00 am-3:29 pm

1 stop12h 29m

$474

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 10/27

5:58 pm-9:55 am

1 stop10h 57m

Dublin

Wed 11/12

9:00 am-3:29 pm

1 stop12h 29m

$481

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/17

11:05 am-8:10 am

1 stop15h 05m

Dublin

Wed 11/26

9:00 am-3:29 pm

1 stop12h 29m

$487

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 10/29

4:50 pm-11:00 am

1 stop13h 10m

Dublin

Wed 11/5

5:10 am-1:55 pm

1 stop14h 45m

$491

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 10/28

2:15 pm-11:30 am

2 stops16h 15m

Shannon

Tue 11/4

7:50 am-11:07 pm

2 stops21h 17m

$519

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/12

3:50 pm-11:00 am

1 stop13h 10m

Dublin

Tue 12/2

5:10 pm-1:55 pm

1 stop26h 45m

$540

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/11

6:21 pm-1:35 pm

2 stops13h 14m

Dublin

Sat 2/28

11:30 am-11:32 pm

2 stops18h 02m

$555

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/12

4:30 pm-8:45 am

1 stop10h 15m

Dublin

Sat 12/6

10:45 am-5:25 pm

1 stop12h 40m

$592

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 11/15

6:00 am-8:45 am

2 stops20h 45m

Dublin

Thu 12/4

6:00 am-5:09 pm

2 stops17h 09m

$616

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 $661. If you aren’t able to travel to Ireland during the month of November, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $731.

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 $875 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 17% 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
British AirwaysPriceFrom $383Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
KLMPriceFrom $412Free CancellationRating
7.8
1,385 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
IberiaPriceFrom $482Free CancellationRating
7.0
2,928 reviews
Search Iberia flights
United AirlinesPriceFrom $492Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
DeltaPriceFrom $532Free CancellationRating
7.9
7,956 reviews
Search Delta flights
American AirlinesPriceFrom $548Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LufthansaPriceFrom $627Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
Aer LingusPriceFrom $736Free CancellationRating
7.2
1,271 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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