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Cheap flights from Ireland to St. Louis from €341

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to St. Louis departing on 3/12. 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

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Find the cheapest flights from Ireland to St. Louis

Recent return flight deals from Ireland to St. Louis

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
19:05 - 23:44DUB-STL
34h 39m2 stops
Scandinavian Airlines Logo
13:55 - 11:45STL-DUB
39h 50m2 stops
€569Scandinavian Airlines
Find Deal
Thu, 13 Nov - Mon, 17 Nov
Scandinavian Airlines Logo
12:30 - 21:02DUB-STL
38h 32m2 stops
Scandinavian Airlines Logo
13:57 - 11:45STL-DUB
39h 48m2 stops
€574Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
12:30 - 23:40DUB-STL
41h 10m2 stops
Scandinavian Airlines Logo
13:57 - 11:45STL-DUB
39h 48m2 stops
€575Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
12:30 - 21:02DUB-STL
38h 32m2 stops
Scandinavian Airlines Logo
11:40 - 11:45STL-DUB
42h 05m2 stops
€576Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Multiple Airlines Logo
13:45 - 22:33DUB-STL
14h 48m1 stop
Multiple Airlines Logo
09:54 - 09:00STL-DUB
17h 06m1 stop
€638Multiple Airlines
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Sat, 6 Dec - Mon, 8 Dec
Multiple Airlines Logo
13:45 - 22:33DUB-STL
14h 48m1 stop
Multiple Airlines Logo
09:54 - 09:00STL-DUB
17h 06m1 stop
€639Multiple Airlines
Find Deal
Tue, 2 Dec - Mon, 8 Dec
Aer Lingus Logo
07:35 - 23:04DUB-STL
21h 29m2 stops
Aer Lingus Logo
10:47 - 10:15STL-DUB
17h 28m2 stops
€710Aer Lingus
Find Deal
Tue, 2 Dec - Tue, 9 Dec
United Airlines Logo
09:00 - 15:29DUB-STL
12h 29m1 stop
United Airlines Logo
06:30 - 08:10STL-DUB
19h 40m1 stop
€780United Airlines
Find Deal
Fri, 5 Dec - Thu, 11 Dec
United Airlines Logo
09:00 - 15:29DUB-STL
12h 29m1 stop
United Airlines Logo
11:25 - 09:55STL-DUB
16h 30m2 stops
€782United Airlines
Find Deal
Wed, 3 Dec - Thu, 11 Dec
American Airlines Logo
11:30 - 10:18DUB-STL
28h 48m1 stop
American Airlines Logo
16:49 - 15:05STL-DUB
16h 16m2 stops
€814American Airlines
Find Deal
Mon, 1 Dec - Fri, 12 Dec

Scandinavian Airlines flights from Ireland to St. Louis

Our best Scandinavian Airlines deals on Ireland to St. Louis flight tickets
Scandinavian Airlines
13 Nov
DUB19:05Dublin
34h 39m
2 stops
STL23:44Lambert-St Louis
17 Nov
STL13:55Lambert-St Louis
39h 50m
2 stops
DUB11:45Dublin
€569
Find similar
Scandinavian Airlines
4 Dec
DUB12:30Dublin
38h 32m
2 stops
STL21:02Lambert-St Louis
8 Dec
STL13:57Lambert-St Louis
39h 48m
2 stops
DUB11:45Dublin
€574
Find similar
Scandinavian Airlines
4 Dec
DUB12:30Dublin
41h 10m
2 stops
STL23:40Lambert-St Louis
8 Dec
STL13:57Lambert-St Louis
39h 48m
2 stops
DUB11:45Dublin
€575
Find similar

Lufthansa flights from Ireland to St. Louis

Our best Lufthansa deals on Ireland to St. Louis flight tickets
Lufthansa
8 Nov
DUB05:10Dublin
24h 34m
2 stops
STL23:44Lambert-St Louis
17 Nov
STL11:37Lambert-St Louis
13h 53m
1 stop
DUB07:30Dublin
€741
Find similar
Lufthansa
26 Nov
DUB05:10Dublin
14h 45m
1 stop
STL13:55Lambert-St Louis
5 Dec
STL13:00Lambert-St Louis
13h 10m
1 stop
DUB08:10Dublin
€755
Find similar
Lufthansa
9 Jan
DUB05:10Dublin
24h 49m
2 stops
STL23:59Lambert-St Louis
16 Jan
STL11:22Lambert-St Louis
14h 08m
1 stop
DUB07:30Dublin
€761
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Ireland to St. Louis 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 19 October 2025.
Use the filters below to find and compare flights from Ireland to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 13/11

19:05-23:44

2 stops34h 39m

Lambert-St Louis

Mon 17/11

13:55-11:45

2 stops39h 50m

€569

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

12:30-21:02

2 stops38h 32m

Lambert-St Louis

Mon 8/12

13:57-11:45

2 stops39h 48m

€574

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

12:30-23:40

2 stops41h 10m

Lambert-St Louis

Mon 8/12

13:57-11:45

2 stops39h 48m

€575

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

12:30-21:02

2 stops38h 32m

Lambert-St Louis

Mon 8/12

11:40-11:45

2 stops42h 05m

€576

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 6/12

13:45-22:33

1 stop14h 48m

Lambert-St Louis

Mon 8/12

09:54-09:00

1 stop17h 06m

€638

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 2/12

13:45-22:33

1 stop14h 48m

Lambert-St Louis

Mon 8/12

09:54-09:00

1 stop17h 06m

€639

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Tue 2/12

07:35-23:04

2 stops21h 29m

Lambert-St Louis

Tue 9/12

10:47-10:15

2 stops17h 28m

€710

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 5/12

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Thu 11/12

06:30-08:10

1 stop19h 40m

€780

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Wed 3/12

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Thu 11/12

11:25-09:55

2 stops16h 30m

€782

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Mon 1/12

11:30-10:18

1 stop28h 48m

Lambert-St Louis

Fri 12/12

16:49-15:05

2 stops16h 16m

€814

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Ireland to St. Louis

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 St. Louis?

The cheapest month to fly to St. Louis from Ireland is in August. Flight prices, which tend to average around €705, are often lower during this time because this is during the off-season. The month of February is another great option to travel to St. Louis, with average flight prices from Ireland averaging around €727.

What is the cheapest day to depart on your flight to St. Louis?

On average, the least expensive day to fly to St. Louis from Ireland is on a Thursday. momondo users have found tickets for Thursday departures for as low as €731. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to St. Louis for around €910.

What is the cheapest time of day to depart on your flight to St. Louis?

At midday is the cheapest time of day to fly from Ireland to St. Louis when you can find flight prices for as low as €684. Flying to St. Louis at midday is an ideal time because this is during off-peak travel hours. Flights in the morning are often more expensive, with an average ticket price of €840.

Cheap Ireland to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to St. Louis

Direct flights

None
There are no direct flights from Ireland to St. Louis. There are no popular flight routes from Ireland to St. Louis.
Search flight deals

  • When did momondo last update prices for flights from Ireland to Lambert-St Louis Airport?

    Prices for flights from Ireland to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Ireland to Lambert-St Louis Airport?

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

    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 Ireland to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ireland to St. Louis

Compare and see reviews for airlines that fly from Ireland to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom €127Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom €707Free CancellationRating
7.4
8,989 reviews
Search United Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ireland to St. Louis. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to St. Louis from Ireland which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ireland to St. Louis?

momondo provides multiple filters to help you find the best flight to St. Louis from Ireland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ireland to St. Louis right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ireland to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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