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Cheap flights from St. Louis to Ireland from $331

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 10/28. 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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Find the cheapest flights from St. Louis to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:30 am - 8:10 amSTL-DUB
19h 40m1 stop
United Airlines Logo
9:00 am - 4:28 pmDUB-STL
37h 28m2 stops
$465United Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
American Airlines Logo
2:54 pm - 10:15 amSTL-DUB
13h 21m2 stops
American Airlines Logo
11:30 am - 10:44 pmDUB-STL
17h 14m1 stop
$474American Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 14
Multiple Airlines Logo
11:05 am - 8:10 amSTL-DUB
15h 05m1 stop
Multiple Airlines Logo
5:10 am - 1:55 pmDUB-STL
14h 45m1 stop
$477Multiple Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
United Airlines Logo
3:14 pm - 8:10 amSTL-DUB
10h 56m1 stop
United Airlines Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$478United Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
American Airlines Logo
2:54 pm - 10:15 amSTL-DUB
13h 21m2 stops
American Airlines Logo
11:30 am - 11:12 pmDUB-STL
17h 42m2 stops
$479American Airlines
Find Deal
Wed, Jan 7 - Wed, Jan 14
Delta Logo
6:00 am - 9:20 amSTL-DUB
21h 20m2 stops
Delta Logo
5:55 am - 4:07 pmDUB-STL
16h 12m2 stops
$486Delta
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Tue, Nov 4 - Fri, Nov 14
Air Canada Logo
6:43 pm - 7:10 amSTL-DUB
30h 27m2 stops
Air Canada Logo
9:00 am - 3:47 pmDUB-STL
36h 47m2 stops
$487Air Canada
Find Deal
Mon, Nov 10 - Mon, Nov 17
Delta Logo
6:00 am - 9:20 amSTL-DUB
21h 20m2 stops
Delta Logo
10:45 am - 4:33 pmDUB-STL
11h 48m1 stop
$488Delta
Find Deal
Tue, Nov 4 - Thu, Nov 13
Air Canada Logo
8:21 am - 7:10 amSTL-DUB
16h 49m2 stops
Air Canada Logo
9:00 am - 3:29 pmDUB-STL
12h 29m1 stop
$495Air Canada
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Tue, Feb 17 - Mon, Feb 23
Lufthansa Logo
4:50 pm - 8:35 amSTL-DUB
34h 45m1 stop
Lufthansa Logo
5:10 am - 1:55 pmDUB-STL
14h 45m1 stop
$573Lufthansa
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Wed, Oct 29 - Wed, Nov 12

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
Nov 26
STL6:30 amLambert-St Louis
19h 40m
1 stop
DUB8:10 amDublin
Dec 3
DUB9:00 amDublin
37h 28m
2 stops
STL4:28 pmLambert-St Louis
$465
Find similar
United Airlines
Nov 26
STL3:14 pmLambert-St Louis
10h 56m
1 stop
DUB8:10 amDublin
Dec 3
DUB9:00 amDublin
12h 29m
1 stop
STL3:29 pmLambert-St Louis
$478
Find similar
United Airlines
Nov 10
STL8:25 amLambert-St Louis
19h 55m
1 stop
DUB10:20 amDublin
Nov 17
DUB9:00 amDublin
39h 47m
2 stops
STL6:47 pmLambert-St Louis
$480
Find similar

American Airlines flights from St. Louis to Ireland

Our best American Airlines deals on St. Louis to Ireland flight tickets
American Airlines
Jan 7
STL2:54 pmLambert-St Louis
13h 21m
2 stops
DUB10:15 amDublin
Jan 14
DUB11:30 amDublin
17h 14m
1 stop
STL10:44 pmLambert-St Louis
$474
Find similar
American Airlines
Jan 7
STL2:54 pmLambert-St Louis
13h 21m
2 stops
DUB10:15 amDublin
Jan 14
DUB11:30 amDublin
17h 42m
2 stops
STL11:12 pmLambert-St Louis
$479
Find similar
American Airlines
Jan 6
STL2:54 pmLambert-St Louis
18h 31m
2 stops
ORK3:25 pmCork
Jan 20
ORK11:55 amCork
17h 17m
2 stops
STL11:12 pmLambert-St Louis
$486
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 October 14, 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

Wed 11/26

6:30 am-8:10 am

1 stop19h 40m

Dublin

Wed 12/3

9:00 am-4:28 pm

2 stops37h 28m

$465

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 1/7

2:54 pm-10:15 am

2 stops13h 21m

Dublin

Wed 1/14

11:30 am-10:44 pm

1 stop17h 14m

$474

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/26

11:05 am-8:10 am

1 stop15h 05m

Dublin

Wed 12/3

5:10 am-1:55 pm

1 stop14h 45m

$477

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 11/26

3:14 pm-8:10 am

1 stop10h 56m

Dublin

Wed 12/3

9:00 am-3:29 pm

1 stop12h 29m

$478

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 1/7

2:54 pm-10:15 am

2 stops13h 21m

Dublin

Wed 1/14

11:30 am-11:12 pm

2 stops17h 42m

$479

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

6:00 am-9:20 am

2 stops21h 20m

Dublin

Fri 11/14

5:55 am-4:07 pm

2 stops16h 12m

$486

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 11/10

6:43 pm-7:10 am

2 stops30h 27m

Dublin

Mon 11/17

9:00 am-3:47 pm

2 stops36h 47m

$487

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/4

6:00 am-9:20 am

2 stops21h 20m

Dublin

Thu 11/13

10:45 am-4:33 pm

1 stop11h 48m

$488

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 2/17

8:21 am-7:10 am

2 stops16h 49m

Dublin

Mon 2/23

9:00 am-3:29 pm

1 stop12h 29m

$495

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 10/29

4:50 pm-8:35 am

1 stop34h 45m

Dublin

Wed 11/12

5:10 am-1:55 pm

1 stop14h 45m

$573

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 $558. 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 $704.

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 $857 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 22% 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.
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  • 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
6.7
7,454 reviews
Search British Airways flights
KLMPriceFrom $412Free CancellationRating
7.7
1,402 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,294 reviews
Search Air Canada flights
IberiaPriceFrom $482Free CancellationRating
7.0
2,988 reviews
Search Iberia flights
United AirlinesPriceFrom $492Free CancellationRating
7.4
8,975 reviews
Search United Airlines flights
LufthansaPriceFrom $526Free CancellationRating
6.8
7,487 reviews
Search Lufthansa flights
DeltaPriceFrom $532Free CancellationRating
7.9
7,972 reviews
Search Delta flights
American AirlinesPriceFrom $562Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
Aer LingusPriceFrom $736Free CancellationRating
7.2
1,336 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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