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Cheap flights from Ireland to St. Louis from €375

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 15/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
12:30 - 21:02DUB-STL
38h 32m2 stops
Scandinavian Airlines Logo
13:57 - 11:45STL-DUB
39h 48m2 stops
€567Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
12:30 - 21:02DUB-STL
38h 32m2 stops
Scandinavian Airlines Logo
13:57 - 11:45STL-DUB
39h 48m2 stops
€595Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Aer Lingus Logo
12:00 - 23:24DUB-STL
17h 24m2 stops
Aer Lingus Logo
11:14 - 14:50STL-DUB
21h 36m2 stops
€737Aer Lingus
Find Deal
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
13:45 - 22:33DUB-STL
14h 48m1 stop
Multiple Airlines Logo
09:54 - 12:20STL-DUB
20h 26m2 stops
€761Multiple Airlines
Find Deal
Thu, 4 Dec - Sun, 14 Dec
Aer Lingus Logo
18:00 - 19:30DUB-STL
31h 30m1 stop
Aer Lingus Logo
12:56 - 11:15STL-DUB
16h 19m2 stops
€763Aer Lingus
Find Deal
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
05:10 - 13:55DUB-STL
14h 45m1 stop
Multiple Airlines Logo
11:50 - 07:30STL-DUB
13h 40m1 stop
€790Multiple Airlines
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Fri, 21 Nov - Thu, 4 Dec
United Airlines Logo
09:00 - 15:29DUB-STL
12h 29m1 stop
United Airlines Logo
06:30 - 08:10STL-DUB
19h 40m1 stop
€798United Airlines
Find Deal
Fri, 21 Nov - Sat, 29 Nov
United Airlines Logo
09:00 - 15:29DUB-STL
12h 29m1 stop
United Airlines Logo
12:55 - 07:30STL-DUB
12h 35m2 stops
€801United Airlines
Find Deal
Fri, 21 Nov - Thu, 4 Dec
American Airlines Logo
11:30 - 19:30DUB-STL
14h 00m2 stops
American Airlines Logo
10:56 - 08:40STL-DUB
15h 44m1 stop
€810American Airlines
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Thu, 4 Dec - Mon, 8 Dec
American Airlines Logo
11:30 - 19:30DUB-STL
14h 00m2 stops
American Airlines Logo
10:56 - 08:40STL-DUB
15h 44m1 stop
€810American Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec

Scandinavian Airlines flights from Ireland to St. Louis

Our best Scandinavian Airlines deals on Ireland to St. Louis flight tickets
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
€567
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
€595
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
€668
Find similar

Lufthansa flights from Ireland to St. Louis

Our best Lufthansa deals on Ireland to St. Louis flight tickets
Lufthansa
3 Dec
DUB05:10Dublin
14h 45m
1 stop
STL13:55Lambert-St Louis
13 Dec
STL13:00Lambert-St Louis
13h 10m
1 stop
DUB08:10Dublin
€789
Find similar
Lufthansa
16 Feb
DUB05:10Dublin
21h 13m
2 stops
STL20:23Lambert-St Louis
22 Feb
STL12:15Lambert-St Louis
16h 05m
1 stop
DUB10:20Dublin
€792
Find similar
Lufthansa
21 Nov
DUB05:10Dublin
18h 29m
2 stops
STL17:39Lambert-St Louis
4 Dec
STL11:50Lambert-St Louis
16h 05m
1 stop
DUB09:55Dublin
€794
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 6 November 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 4/12

12:30-21:02

2 stops38h 32m

Lambert-St Louis

Mon 8/12

13:57-11:45

2 stops39h 48m

€567

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

€595

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 25/4

12:00-23:24

2 stops17h 24m

Lambert-St Louis

Sat 2/5

11:14-14:50

2 stops21h 36m

€737

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

13:45-22:33

1 stop14h 48m

Lambert-St Louis

Sun 14/12

09:54-12:20

2 stops20h 26m

€761

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Sat 25/4

18:00-19:30

1 stop31h 30m

Lambert-St Louis

Sat 2/5

12:56-11:15

2 stops16h 19m

€763

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 21/11

05:10-13:55

1 stop14h 45m

Lambert-St Louis

Thu 4/12

11:50-07:30

1 stop13h 40m

€790

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 21/11

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Sat 29/11

06:30-08:10

1 stop19h 40m

€798

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Fri 21/11

09:00-15:29

1 stop12h 29m

Lambert-St Louis

Thu 4/12

12:55-07:30

2 stops12h 35m

€801

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

11:30-19:30

2 stops14h 00m

Lambert-St Louis

Mon 8/12

10:56-08:40

1 stop15h 44m

€810

DublinSt. Louis

DUB - STL

DUBSTL

Dublin

Thu 4/12

11:30-19:30

2 stops14h 00m

Lambert-St Louis

Mon 8/12

10:56-08:40

1 stop15h 44m

€810

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 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 €715, 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 €737.

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 €742. 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 €923.

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 €694. 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 €852.

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 €129Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
United AirlinesPriceFrom €717Free CancellationRating
7.4
9,002 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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