€351 Find Cheap Flights from St. Louis to Ireland

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Ireland departing on 25/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Best Ireland Flight Deals from St. Louis

Cheapest return prices found by our users on KAYAK in the last 72 hours
Dublin
Dublin1 stop€553
Shannon
Shannon1 stop€571
Milltown (Kerry)
Milltown (Kerry)2 stops€1,329
Dublin
Dublin1 stop€553
Shannon
Shannon1 stop€571
Milltown (Kerry)
Milltown (Kerry)2 stops€1,329

Cheap Flights from St. Louis to Ireland

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from St. Louis to Ireland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from St. Louis to Ireland

Tue, 11 Aug - Wed, 19 Aug
Air Canada Logo
14:40 - 08:15
STL
-
DUB
11h 35m
1 stop
Air Canada Logo
09:20 - 12:13
DUB
-
STL
32h 53m
2 stops
€553Air Canada
Sun, 16 Aug - Tue, 25 Aug
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
€556Air Canada
Tue, 11 Aug - Wed, 19 Aug
United Airlines Logo
17:32 - 09:45
STL
-
DUB
10h 13m
1 stop
United Airlines Logo
09:20 - 14:02
DUB
-
STL
10h 42m
1 stop
€561United Airlines
Mon, 17 Aug - Wed, 26 Aug
Lufthansa Logo
15:30 - 11:40
STL
-
DUB
14h 10m
1 stop
Lufthansa Logo
05:55 - 13:25
DUB
-
STL
13h 30m
1 stop
€569Lufthansa
Sun, 16 Aug - Fri, 28 Aug
United Airlines Logo
10:24 - 07:30
STL
-
SNN
15h 06m
1 stop
United Airlines Logo
09:30 - 14:25
SNN
-
STL
10h 55m
1 stop
€571United Airlines
Sun, 16 Aug - Fri, 28 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
€574KLM
Sun, 16 Aug - Fri, 28 Aug
KLM Logo
16:13 - 11:10
STL
-
SNN
12h 57m
1 stop
KLM Logo
13:05 - 16:55
SNN
-
STL
33h 50m
1 stop
€575KLM
Tue, 25 Aug - Tue, 15 Sep
Lufthansa Logo
18:55 - 16:50
STL
-
DUB
15h 55m
2 stops
Lufthansa Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€577Lufthansa
Wed, 2 Sep - Tue, 8 Sep
Multiple Airlines Logo
08:55 - 08:15
STL
-
DUB
17h 20m
1 stop
Multiple Airlines Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€585Multiple Airlines
Mon, 31 Aug - Fri, 11 Sep
Multiple Airlines Logo
12:10 - 08:15
STL
-
DUB
38h 05m
2 stops
Multiple Airlines Logo
06:05 - 13:25
DUB
-
STL
13h 20m
1 stop
€588Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Ireland flights

Get data-powered insights and trends into flights from St. Louis to Ireland to help you find the cheapest flights, the best time to fly, and much more.

What is the cheapest month to fly from St. Louis to Ireland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Ireland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Ireland is January, when tickets cost €454 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is €1,032 and €759 respectively.

How far in advance should I book a flight from St. Louis to Ireland?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Ireland, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from St. Louis to Ireland, you should book around 3 weeks before departure, which saves you about 70% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Find deals

Good to know

Low seasonDecember
Cheapest flight€351
Best time to beat the crowds but there is an average 3% increase in price.
Flight from St. Louis to Dublin

FAQs - booking Ireland flights

  • Can I get assistance with my luggage while at STL?

    If you have heavy luggage and need assistance in getting through the airport, STL is equipped with baggage carts that you can take advantage of to help you get through the airport. These baggage carts are found in terminals 1 and 2. Note that charges may apply.

  • What family services does STL offer?

    STL offers great family services that parents and guardians traveling with kids can utilize. The features an interactive kids’ play area located in terminals located near Gate3 where kids can expend some energy before boarding their flights. You can also have access to family restrooms found throughout the airport concourses and terminals.

  • Where can I get assistance at Ireland airports?

    DUB, ORK and SNN feature information desks where you can get particular information or any assistance that you need while at the airports. At DUB, you will find them in the Arrivals area terminal 1, while at ORK, they are located on the landside and at SNN near the front entrance.

  • Can I freshen up at Ireland airports?

    ORK doesn’t have any shower facilities, while DUB and SNN are equipped with excellent shower amenities that passengers can utilize on their arrival to freshen up. These shower facilities are located in the airport lounges.

  • How does KAYAK find such low prices on flights from St. Louis to Ireland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Ireland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Ireland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Ireland is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Ireland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from St. Louis to Ireland with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Ireland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Ireland

  • If you are flying from St Louis to Ireland through St Louis Lambert International Airport (STL), ensure that you arrive at the airport at least 3 hours before your scheduled flight departure. This is to give you enough time to check in, go through security checks and arrive at your boarding gate on time. Nonetheless, if you are self-driving to the airport, it gives you ample time to park your car.
  • Dublin Airport (DUB) is the main airport in Ireland, serving major international and domestic flights. However, you can also land at Shannon Airport (SNN) or Cork Airport (ORK). ORK and DUB serve as the main hub of Ryanair and Aer Lingus airlines, while SNN serves as the hub of Aer Lingus.
  • Upon your arrival at any of the airports in Ireland, you will find car rental agencies like Budget, Sixt, Dollar, Europcar, Avis and Enterprise. At DUB, the rental agencies are found in terminals 1 and 2, while at SNN, they are found across the baggage claim. On the other hand, at ORK, these car rental companies are found at the Arrivals Hall.
  • There are no multiple flight options when flying from St Louis to Ireland. Passengers can only opt for multiple connecting flight services as this is a long flight duration. Delta Airlines, United Airlines and Air Canada are some of the carriers frequently operating along this route, offering two-stop flight options with layovers at Vancouver (YYZ), Washington Dulles (IAD), Newark Liberty (EWR), Atlanta (ATL) and Frankfurt (FRA) Airports.
  • The military USO Lounge at the STL offers a comfortable place for you and your family to wait for your flight if you are an active duty US military member. The lounge offers services such as sleeping areas with bunks and beds, showers, bathrooms, toiletries, children's play area, luggage storage, charging stations, assistance with local information and travel plans and snacks and beverages. They are located in terminals 1 and 2.

Reviews of the top airline flying from St. Louis to Ireland

 
Need help choosing which airline to fly with from St. Louis to Ireland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11520 reviews
6.9Entertainment
7.5Boarding
7.9Crew
7.2Comfort
6.4Food
Airline reviews

The flight changed gates multiple times and flight had to be delayed multiple times

4.0 OkayFaraz, Mar 2026
DFW - BWI
Read more American Airlines reviews

The flight changed gates multiple times and flight had to be delayed multiple times

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

I was in last row so that is never great bc the person in front of me leaned his seat all the way back into me.

Delayed for mechanical and no updates on what was happening and how long the delay might be.

My flight from LGA was cancelled and my rebooked flight from JFK was delayed numerous times. I will now be getting home after 2am.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Typical AA - late by 90+ mn. Gate changed twice... Changed the departure time 6 times No explanation, no communication on reasons for delay I travel with AA twice a year... and it is consistently very poor.. I will continue to use AA only when i have to.

The flight attendant in business class was excellent! Professional, friendly and attentive.

Everything you need to know for your flight from St. Louis to Ireland

Information on your arrival and departure airports

St. Louis (STL)