Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Ireland from $271

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 5/27. 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.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:35 pm - 2:40 pm
STL
-
DUB
11h 05m1 stop
British Airways Logo
8:35 am - 7:30 pm
DUB
-
STL
16h 55m1 stop
$402British Airways
Wed, Apr 22 - Fri, May 1
British Airways Logo
1:29 pm - 10:15 am
STL
-
DUB
14h 46m2 stops
British Airways Logo
8:40 am - 7:30 pm
DUB
-
STL
16h 50m1 stop
$406British Airways
Tue, Apr 14 - Wed, Apr 22
United Airlines Logo
7:41 am - 8:10 am
STL
-
DUB
18h 29m1 stop
United Airlines Logo
9:00 am - 8:26 pm
DUB
-
STL
41h 26m2 stops
$408United Airlines
Wed, Feb 18 - Fri, Feb 27
United Airlines Logo
4:05 pm - 8:15 am
STL
-
DUB
10h 10m1 stop
United Airlines Logo
9:50 am - 10:28 pm
DUB
-
STL
42h 38m2 stops
$415United Airlines
Sun, Apr 5 - Tue, Apr 14
Air Canada Logo
9:57 am - 7:10 am
STL
-
DUB
39h 13m2 stops
Air Canada Logo
9:00 am - 9:05 pm
DUB
-
STL
42h 05m2 stops
$416Air Canada
Sat, Jan 24 - Wed, Feb 11
American Airlines Logo
1:35 pm - 11:30 am
STL
-
SNN
15h 55m2 stops
American Airlines Logo
2:45 pm - 11:29 am
SNN
-
STL
26h 44m1 stop
$434American Airlines
Mon, Feb 9 - Tue, Mar 3
American Airlines Logo
12:11 pm - 6:20 am
STL
-
SNN
12h 09m1 stop
American Airlines Logo
2:45 pm - 11:29 am
SNN
-
STL
26h 44m1 stop
$444American Airlines
Mon, Feb 9 - Tue, Mar 3
Multiple Airlines Logo
4:05 pm - 11:25 pm
STL
-
ORK
26h 20m2 stops
Multiple Airlines Logo
5:35 pm - 3:29 pm
ORK
-
STL
50h 54m2 stops
$738Multiple Airlines
Wed, Mar 18 - Sun, Mar 22
Multiple Airlines Logo
4:05 pm - 3:35 pm
STL
-
ORK
42h 30m2 stops
Multiple Airlines Logo
7:20 am - 9:08 pm
ORK
-
STL
19h 48m3 stops
$795Multiple Airlines
Fri, Mar 27 - Sat, Apr 4
Air Canada Logo
4:05 pm - 11:25 pm
STL
-
ORK
26h 20m2 stops
Air Canada Logo
7:20 am - 9:08 pm
ORK
-
STL
19h 48m3 stops
$816Air Canada
Wed, Mar 25 - Sat, Apr 4

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
Jan 19
STL6:40 pmLambert-St Louis
30h 30m
2 stops
DUB7:10 amDublin
Feb 4
DUB9:00 amDublin
12h 15m
1 stop
STL3:15 pmLambert-St Louis
$370
Air Canada
Jan 24
STL9:57 amLambert-St Louis
39h 13m
2 stops
DUB7:10 amDublin
Feb 11
DUB9:00 amDublin
42h 05m
2 stops
STL9:05 pmLambert-St Louis
$416
Air Canada
Apr 8
STL9:10 amLambert-St Louis
17h 05m
2 stops
DUB8:15 amDublin
Apr 16
DUB9:50 amDublin
11h 34m
1 stop
STL3:24 pmLambert-St Louis
$433

British Airways flights from St. Louis to Ireland

Our best British Airways deals on St. Louis to Ireland flight tickets
British Airways
Apr 22
STL9:35 pmLambert-St Louis
11h 05m
1 stop
DUB2:40 pmDublin
Apr 29
DUB12:50 pmDublin
12h 40m
1 stop
STL7:30 pmLambert-St Louis
$402
British Airways
Apr 14
STL1:29 pmLambert-St Louis
14h 46m
2 stops
DUB10:15 amDublin
Apr 22
DUB8:40 amDublin
16h 50m
1 stop
STL7:30 pmLambert-St Louis
$406
British Airways
Apr 22
STL9:35 pmLambert-St Louis
11h 05m
1 stop
DUB2:40 pmDublin
May 1
DUB8:35 amDublin
16h 55m
1 stop
STL7:30 pmLambert-St Louis
$407

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 January 10, 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

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 4/22

9:35 pm-2:40 pm

1 stop11h 05m

Dublin

Fri 5/1

8:35 am-7:30 pm

1 stop16h 55m

$402

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 4/14

1:29 pm-10:15 am

2 stops14h 46m

Dublin

Wed 4/22

8:40 am-7:30 pm

1 stop16h 50m

$406

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 2/18

7:41 am-8:10 am

1 stop18h 29m

Dublin

Fri 2/27

9:00 am-8:26 pm

2 stops41h 26m

$408

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 4/5

4:05 pm-8:15 am

1 stop10h 10m

Dublin

Tue 4/14

9:50 am-10:28 pm

2 stops42h 38m

$415

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sat 1/24

9:57 am-7:10 am

2 stops39h 13m

Dublin

Wed 2/11

9:00 am-9:05 pm

2 stops42h 05m

$416

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 2/9

1:35 pm-11:30 am

2 stops15h 55m

Shannon

Tue 3/3

2:45 pm-11:29 am

1 stop26h 44m

$434

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 2/9

12:11 pm-6:20 am

1 stop12h 09m

Shannon

Tue 3/3

2:45 pm-11:29 am

1 stop26h 44m

$444

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/18

4:05 pm-11:25 pm

2 stops26h 20m

Cork

Sun 3/22

5:35 pm-3:29 pm

2 stops50h 54m

$738

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Fri 3/27

4:05 pm-3:35 pm

2 stops42h 30m

Cork

Sat 4/4

7:20 am-9:08 pm

3 stops19h 48m

$795

St. LouisCork

STL - ORK

STLORK

Lambert-St Louis

Wed 3/25

4:05 pm-11:25 pm

2 stops26h 20m

Cork

Sat 4/4

7:20 am-9:08 pm

3 stops19h 48m

$816

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $563. If you aren’t able to travel to Ireland during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $639.

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 $807 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 $614 on momondo.

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

You could potentially save up to 44% 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 50m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 50m
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
1,435 reviews
Search KLM flights
Air CanadaPriceFrom $462Free CancellationRating
7.1
10,608 reviews
Search Air Canada flights
British AirwaysPriceFrom $463Free CancellationRating
6.7
7,667 reviews
Search British Airways flights
LufthansaPriceFrom $465Free CancellationRating
6.8
7,710 reviews
Search Lufthansa flights
United AirlinesPriceFrom $475Free CancellationRating
7.4
9,145 reviews
Search United Airlines flights
IberiaPriceFrom $482Free CancellationRating
7.0
3,081 reviews
Search Iberia flights
DeltaPriceFrom $483Free CancellationRating
7.9
8,037 reviews
Search Delta flights
American AirlinesPriceFrom $485Free CancellationRating
7.2
11,102 reviews
Search American Airlines flights
Aer LingusPriceFrom $714Free CancellationRating
7.2
1,432 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 2/9
Mon 2/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland

Popular cities in Ireland

Popular flights according to clicks in the last 7 days on momondo
Flights to Dublinfrom $315
Flights to Shannon, Clarefrom $354
Flights to Corkfrom $393
Flights to Knockfrom $492
Flights to Milltown (Kerry)from $540
Flights to Donegalfrom $550