€243 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 20/5. 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
Dublin2 stops€348
Shannon
Shannon2 stops€361
Dublin
Dublin2 stops€348
Shannon
Shannon2 stops€361

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, 14 Apr - Wed, 22 Apr
British Airways Logo
16:46 - 13:30
STL
-
DUB
14h 44m
2 stops
British Airways Logo
11:10 - 19:30
DUB
-
STL
14h 20m
1 stop
€348British Airways
Tue, 14 Apr - Wed, 22 Apr
British Airways Logo
09:37 - 10:15
STL
-
DUB
18h 38m
2 stops
British Airways Logo
12:50 - 19:30
DUB
-
STL
12h 40m
1 stop
€349British Airways
Mon, 23 Feb - Tue, 3 Mar
British Airways Logo
14:19 - 10:15
STL
-
DUB
13h 56m
2 stops
British Airways Logo
08:50 - 21:12
DUB
-
STL
18h 22m
2 stops
€353British Airways
Tue, 3 Feb - Fri, 13 Feb
British Airways Logo
09:33 - 11:15
STL
-
DUB
19h 42m
2 stops
British Airways Logo
07:35 - 21:12
DUB
-
STL
19h 37m
2 stops
€354British Airways
Wed, 8 Apr - Thu, 16 Apr
British Airways Logo
13:29 - 12:05
STL
-
DUB
16h 36m
2 stops
British Airways Logo
08:40 - 18:27
DUB
-
STL
15h 47m
2 stops
€358British Airways
Tue, 14 Apr - Wed, 22 Apr
United Airlines Logo
08:30 - 07:20
STL
-
DUB
16h 50m
1 stop
United Airlines Logo
09:50 - 15:24
DUB
-
STL
11h 34m
1 stop
€365United Airlines
Sat, 25 Apr - Wed, 6 May
American Airlines Logo
18:53 - 16:05
STL
-
SNN
15h 12m
2 stops
American Airlines Logo
13:45 - 10:53
SNN
-
STL
27h 08m
1 stop
€416American Airlines
Thu, 5 Mar - Thu, 12 Mar
American Airlines Logo
06:00 - 06:20
STL
-
SNN
18h 20m
2 stops
American Airlines Logo
14:45 - 11:29
SNN
-
STL
25h 44m
1 stop
€428American Airlines
Thu, 5 Mar - Thu, 12 Mar
American Airlines Logo
06:00 - 06:20
STL
-
SNN
18h 20m
2 stops
American Airlines Logo
07:50 - 21:11
SNN
-
STL
18h 21m
2 stops
€429American Airlines
Tue, 21 Apr - Sun, 3 May
American Airlines Logo
14:29 - 11:20
STL
-
SNN
14h 51m
2 stops
American Airlines Logo
13:45 - 10:53
SNN
-
STL
27h 08m
1 stop
€472American 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 November, when tickets cost €484 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is €1,072 and €874 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 2 weeks before departure, which saves you about 66% 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€243
Best time to beat the crowds (12% less expensive on average)
Most popular time to fly (5% 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 11164 reviews
6.9Entertainment
7.5Boarding
8.0Crew
6.4Food
7.2Comfort
Airline reviews

It was good. But the gate team made me check my carry on when there was plenty of space for my luggage on the plane. Otherwise our trip was fine.

8.0 ExcellentAnonymous, Jan 2026
BNA - LGA
Read more American Airlines reviews

It was good. But the gate team made me check my carry on when there was plenty of space for my luggage on the plane. Otherwise our trip was fine.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

Concern Regarding Significant Gate Delay and Jet Bridge Issue Dear Customer Relations Team, I am writing to express my disappointment with the experience I had on my recent flight AA 2414 on Sunday January 18, 2026. What should have been a routine departure turned into a frustrating and avoidable delay due to an issue with the jet bridge at the gate. As a result, the flight was delayed by approximately 90 minutes while multiple gate changes were attempted. The lack of clear communication during this period made the situation even more challenging. Passengers were left uncertain about the cause of the delay, the expected timeline, and the next steps. This not only disrupted travel plans but also created unnecessary stress for everyone on board. I understand that operational issues can arise, but a malfunctioning jet bridge and the resulting extended delay suggest an area where procedures or equipment maintenance may need attention. I hope you will review this incident to prevent similar disruptions in the future. I would appreciate acknowledgment of this concern and consideration of appropriate compensation for the inconvenience and lost time caused by this delay. Thank you for taking the time to review my experience. I look forward to hearing from you. Sincerely, Dion Dillard

They made me pay $40 to check a bag that was listed as free when I bought my ticket. Then before boarding they offered to check any bags free.

It was a good trip. Flight Attendants were friendly and responsive.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Crew in Columbia was not prepared for landing. It was a bit of a disaster and getting bags took forever.

My seat tv didn’t work the whole trip. And the seat space is too small despite being seated at the front.

The seat cushions were very worn so they were extremely uncomfortable.

Delayed, no updates, had a rewards number but was not working

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

Information on your arrival and departure airports

St. Louis (STL)