€265 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 5/2. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Ireland

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Best Ireland Flight Deals from St. Louis

Cheapest return prices found by our users on KAYAK in the last 72 hours
Dublin
Dublin1 stop€368
Shannon
Shannon2 stops€506
Dublin
Dublin1 stop€368
Shannon
Shannon2 stops€506

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, 13 Jan - Wed, 21 Jan
Multiple Airlines Logo
11:22 - 07:30
STL
-
DUB
14h 08m1 stop
Multiple Airlines Logo
10:40 - 17:43
DUB
-
STL
13h 03m1 stop
€368Multiple Airlines
Wed, 4 Feb - Sun, 8 Feb
Multiple Airlines Logo
18:40 - 08:10
STL
-
DUB
31h 30m1 stop
Multiple Airlines Logo
09:30 - 23:59
DUB
-
STL
20h 29m1 stop
€369Multiple Airlines
Wed, 14 Jan - Wed, 21 Jan
Austrian Airlines Logo
11:22 - 07:30
STL
-
DUB
14h 08m1 stop
Austrian Airlines Logo
09:30 - 23:59
DUB
-
STL
20h 29m1 stop
€376Austrian Airlines
Wed, 22 Apr - Wed, 6 May
British Airways Logo
22:00 - 17:30
STL
-
DUB
13h 30m1 stop
British Airways Logo
10:55 - 19:30
DUB
-
STL
14h 35m1 stop
€382British Airways
Thu, 22 Jan - Sat, 31 Jan
Multiple Airlines Logo
11:22 - 07:30
STL
-
DUB
14h 08m1 stop
Multiple Airlines Logo
09:00 - 14:30
DUB
-
STL
35h 30m2 stops
€385Multiple Airlines
Thu, 22 Jan - Mon, 26 Jan
United Airlines Logo
08:05 - 08:10
STL
-
DUB
18h 05m1 stop
United Airlines Logo
09:00 - 22:00
DUB
-
STL
43h 00m2 stops
€388United Airlines
Thu, 22 Jan - Mon, 26 Jan
United Airlines Logo
10:07 - 07:30
STL
-
DUB
15h 23m2 stops
United Airlines Logo
09:00 - 22:00
DUB
-
STL
43h 00m2 stops
€392United Airlines
Fri, 6 Feb - Fri, 13 Feb
American Airlines Logo
13:35 - 11:30
STL
-
SNN
15h 55m2 stops
American Airlines Logo
07:50 - 23:28
SNN
-
STL
21h 38m2 stops
€506American Airlines
Wed, 25 Mar - Sat, 4 Apr
American Airlines Logo
13:36 - 11:30
STL
-
SNN
16h 54m2 stops
American Airlines Logo
07:40 - 19:30
SNN
-
STL
17h 50m2 stops
€515American Airlines
Wed, 14 Jan - Thu, 29 Jan
British Airways Logo
15:54 - 16:45
STL
-
SNN
18h 51m2 stops
British Airways Logo
07:50 - 23:12
SNN
-
STL
21h 22m2 stops
€635British Airways
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 November, when tickets cost €480 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is €1,055 and €888 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 15% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Find deals

Good to know

Low seasonDecember
Cheapest flight€265
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (3% more expensive on average)
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.
7.2
American AirlinesOverall score based on 11054 reviews
6.9Entertainment
6.4Food
8.0Crew
7.2Comfort
7.5Boarding
Airline reviews

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

6.0 GoodDan, Dec 2025
ORD - ALO
Read more American Airlines reviews

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

I don’t know who decides what food to serve on these flights but I would be so embarrassed if I served this to anyone and call it food…

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

The pilot greased the landing and the crew was fantastic.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

delayed due to weather. Could not communicate with family since the wifi was broken

Experience was good, however I had a delay due to weather happening and had to re purchase a seat on a new plane for a higher price (could be my own issue and misunderstanding) but other than that situation. First time flyer (by myself) was terrific!! The last from ORD to ALO didn't have wifi, but it was only 45 minutes so I'm sure that was part of the reason. Overall my experience was great! Next time I will remember to buy tickets with longer layovers. The delays really saved my overall anxiety. :)

Flight was delayed 17 hours due to aircraft issues. American did provide hotel, transportation and meals, 3 hours past boarding time, but it took us another hour to get the vouchers.

Flight was on time is the only good thing. Person loading the plane called 1-6 to board at the same time, made it chaotic. Plane was too small for even putting backpacks in overhead. Seat for normal sized people were too small. The WIFI didn't work. When we landed had to wait because not enough ground crew.

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

Information on your arrival and departure airports

St. Louis (STL)