€206 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 25/8. 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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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€451
Shannon
Shannon2 stops€475
Milltown (Kerry)
Milltown (Kerry)3 stops€1,323
Dublin
Dublin1 stop€451
Shannon
Shannon2 stops€475
Milltown (Kerry)
Milltown (Kerry)3 stops€1,323

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

Sun, 16 Aug - Tue, 25 Aug
Multiple Airlines Logo
12:10 - 07:45
STL
-
DUB
13h 35m
1 stop
Multiple Airlines Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€451Multiple Airlines
Sun, 16 Aug - Tue, 25 Aug
Multiple Airlines Logo
12:10 - 08:15
STL
-
DUB
14h 05m
2 stops
Multiple Airlines Logo
06:00 - 13:25
DUB
-
STL
13h 25m
1 stop
€454Multiple Airlines
Sat, 15 Aug - Tue, 25 Aug
United Airlines Logo
18:55 - 09:45
STL
-
DUB
32h 50m
1 stop
United Airlines Logo
09:50 - 12:49
DUB
-
STL
32h 59m
2 stops
€455United Airlines
Sat, 15 Aug - Tue, 25 Aug
United Airlines Logo
17:32 - 07:45
STL
-
DUB
32h 13m
2 stops
United Airlines Logo
09:50 - 12:49
DUB
-
STL
32h 59m
2 stops
€457United Airlines
Sun, 16 Aug - Tue, 25 Aug
British Airways Logo
21:40 - 16:20
STL
-
DUB
12h 40m
1 stop
British Airways Logo
10:30 - 19:30
DUB
-
STL
15h 00m
1 stop
€465British Airways
Tue, 1 Sep - Tue, 15 Sep
United Airlines Logo
12:30 - 07:30
STL
-
DUB
13h 00m
1 stop
United Airlines Logo
09:20 - 18:41
DUB
-
STL
15h 21m
1 stop
€466United Airlines
Tue, 11 Aug - Wed, 19 Aug
United Airlines Logo
05:10 - 07:45
STL
-
DUB
20h 35m
2 stops
United Airlines Logo
09:20 - 20:02
DUB
-
STL
16h 42m
1 stop
€467United Airlines
Wed, 2 Sep - Tue, 15 Sep
Air Canada Logo
05:00 - 07:45
STL
-
DUB
20h 45m
2 stops
Air Canada Logo
09:20 - 18:41
DUB
-
STL
15h 21m
1 stop
€469Air Canada
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
€475KLM
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
€527KLM
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 €450 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is €1,013 and €752 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€206
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly (1% 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.
7.1
American AirlinesOverall score based on 11419 reviews
6.9Entertainment
7.2Comfort
6.4Food
7.5Boarding
7.9Crew
Airline reviews

American continues to decline in their customer service and its beyond disappointing.

2.0 MediocreRachel, Mar 2026
ORD - CLE
Read more American Airlines reviews

American continues to decline in their customer service and its beyond disappointing.

Mechanical issue delayed us 2hrs and then once we landed sat on tarmac for 30mins because someone left a vehicle in front of the gaye

The crew was excellent and overall the flight was good. No complaints.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

Never had such a lazy first class attendant. Literally spent 60%+ of the flight playing games on her personal phone making up excuses of why she was unavailable.

The flight attendants and the service is getting worse by the day.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Like all of the flights I took to get down to Dallas. They were delayed

Other than nearly three hour delay for maintenance issues, everything went smooth

Plane from partner PSA was filthy. Plastic needs to be thoroughly cleaned. Really disgusting to look at and wonder about cleanliness of parts less visible.

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

Information on your arrival and departure airports

St. Louis (STL)