Latest deals
Insights
FAQs
Price Alerts

Cheap flights from St. Louis to Ireland from €321

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 10/6. 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
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise 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 return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:10 - 07:45
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
05:55 - 13:25
DUB
-
STL
13h 30m
1 stop
€581Multiple Airlines
Wed, 19 Aug - Wed, 2 Sep
United Airlines Logo
12:10 - 07:45
STL
-
DUB
13h 35m
1 stop
United Airlines Logo
09:20 - 17:49
DUB
-
STL
38h 29m
2 stops
€590United Airlines
Wed, 19 Aug - Wed, 2 Sep
United Airlines Logo
08:55 - 08:15
STL
-
DUB
17h 20m
1 stop
United Airlines Logo
09:20 - 23:50
DUB
-
STL
44h 30m
2 stops
€594United Airlines
Tue, 1 Sep - Wed, 9 Sep
Air Canada Logo
12:10 - 07:45
STL
-
DUB
13h 35m
1 stop
Air Canada Logo
09:50 - 18:42
DUB
-
STL
14h 52m
1 stop
€597Air Canada
Sun, 16 Aug - Tue, 25 Aug
United Airlines Logo
05:10 - 07:45
STL
-
DUB
20h 35m
2 stops
United Airlines Logo
09:20 - 20:07
DUB
-
STL
16h 47m
1 stop
€598United Airlines
Tue, 11 Aug - Wed, 19 Aug
Air Canada Logo
08:00 - 07:45
STL
-
DUB
17h 45m
2 stops
Air Canada Logo
09:50 - 18:42
DUB
-
STL
14h 52m
1 stop
€601Air Canada
Sun, 16 Aug - Tue, 25 Aug
Air Canada Logo
09:16 - 07:45
STL
-
DUB
16h 29m
2 stops
Air Canada Logo
09:20 - 14:02
DUB
-
STL
10h 42m
1 stop
€602Air Canada
Mon, 17 Aug - Wed, 26 Aug
KLM Logo
19:05 - 11:10
STL
-
SNN
34h 05m
2 stops
KLM Logo
13:05 - 23:37
SNN
-
STL
16h 32m
2 stops
€616KLM
Sun, 16 Aug - Fri, 28 Aug
Delta Logo
16:13 - 11:10
STL
-
SNN
12h 57m
1 stop
Delta Logo
13:05 - 23:01
SNN
-
STL
15h 56m
2 stops
€616Delta
Sun, 6 Sep - Wed, 16 Sep
KLM Logo
16:12 - 11:10
STL
-
SNN
12h 58m
1 stop
KLM Logo
13:05 - 23:37
SNN
-
STL
16h 32m
2 stops
€659KLM
Wed, 5 Aug - Wed, 26 Aug

Air Canada flights from St. Louis to Ireland

Our best Air Canada deals on St. Louis to Ireland flight tickets
Air Canada
16 Aug
STL12:10Lambert-St Louis
13h 35m
1 stop
DUB07:45Dublin
25 Aug
DUB09:50Dublin
14h 52m
1 stop
STL18:42Lambert-St Louis
€597
Air Canada
16 Aug
STL08:00Lambert-St Louis
17h 45m
2 stops
DUB07:45Dublin
25 Aug
DUB09:50Dublin
14h 52m
1 stop
STL18:42Lambert-St Louis
€601
Air Canada
17 Aug
STL09:16Lambert-St Louis
16h 29m
2 stops
DUB07:45Dublin
26 Aug
DUB09:20Dublin
10h 42m
1 stop
STL14:02Lambert-St Louis
€602

United Airlines flights from St. Louis to Ireland

Our best United Airlines deals on St. Louis to Ireland flight tickets
United Airlines
1 Sept
STL08:55Lambert-St Louis
17h 20m
1 stop
DUB08:15Dublin
9 Sept
DUB09:20Dublin
44h 30m
2 stops
STL23:50Lambert-St Louis
€594
United Airlines
11 Aug
STL05:10Lambert-St Louis
20h 35m
2 stops
DUB07:45Dublin
19 Aug
DUB09:20Dublin
16h 47m
1 stop
STL20:07Lambert-St Louis
€598
United Airlines
11 Aug
STL09:16Lambert-St Louis
18h 29m
1 stop
DUB09:45Dublin
19 Aug
DUB09:20Dublin
10h 42m
1 stop
STL14:02Lambert-St Louis
€603

momondo Fare Finder

 
Customise 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 13,528 searches. Data last updated 8 April 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 return flight
Fastest return journey

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 19/8

12:10-07:45

1 stop13h 35m

Dublin

Wed 2/9

05:55-13:25

1 stop13h 30m

€581

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Wed 19/8

12:10-07:45

1 stop13h 35m

Dublin

Wed 2/9

09:20-17:49

2 stops38h 29m

€590

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 1/9

08:55-08:15

1 stop17h 20m

Dublin

Wed 9/9

09:20-23:50

2 stops44h 30m

€594

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 16/8

12:10-07:45

1 stop13h 35m

Dublin

Tue 25/8

09:50-18:42

1 stop14h 52m

€597

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Tue 11/8

05:10-07:45

2 stops20h 35m

Dublin

Wed 19/8

09:20-20:07

1 stop16h 47m

€598

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Sun 16/8

08:00-07:45

2 stops17h 45m

Dublin

Tue 25/8

09:50-18:42

1 stop14h 52m

€601

St. LouisDublin

STL - DUB

STLDUB

Lambert-St Louis

Mon 17/8

09:16-07:45

2 stops16h 29m

Dublin

Wed 26/8

09:20-14:02

1 stop10h 42m

€602

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

19:05-11:10

2 stops34h 05m

Shannon

Fri 28/8

13:05-23:37

2 stops16h 32m

€616

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 6/9

16:13-11:10

1 stop12h 57m

Shannon

Wed 16/9

13:05-23:01

2 stops15h 56m

€616

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 5/8

16:12-11:10

1 stop12h 58m

Shannon

Wed 26/8

13:05-23:37

2 stops16h 32m

€659

Flights are sorted by cheapest return 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?

The month of February is another great option to travel to Ireland, with average flight prices from St. Louis averaging around €469.

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 €628 when searching weeks before you fly. 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 €513 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

10h 20m

Direct flights

None
The fastest flight from St. Louis to Ireland takes 10h 20m
There are no direct flights from St. Louis to Ireland. There are no popular flight routes from St. Louis to Ireland.
Search flight deals

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 updated daily.

  • How old do you have to be to fly from Lambert-St Louis Airport to Ireland?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. 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 you'll need for your trip to Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Ireland?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Ireland for you.

Can I find flights from St. Louis to Ireland with flexible booking policies on momondo?

Yes. All flights to Ireland from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

If you are not ready to book a flight from St. Louis to Ireland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Ireland and let you know when they change.

An easier way to manage your Ireland trip

We make it super easy to schedule, organise 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
Fri 8/5
Fri 15/5
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 €35
Flights to Corkfrom €82
Flights to Shannon, Clarefrom €93
Flights to Donegalfrom €75
Flights to Milltown (Kerry)from €37