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Cheap flights from St. Louis to Shannon from €604

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Shannon departing on 1/9. 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 St. Louis to Shannon

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
20:30 - 07:30
STL
-
SNN
29h 00m
1 stop
United Airlines Logo
09:30 - 18:16
SNN
-
STL
14h 46m
1 stop
€604United Airlines
Tue, 1 Sep - Fri, 4 Sep
United Airlines Logo
17:32 - 07:30
STL
-
SNN
31h 58m
1 stop
United Airlines Logo
09:30 - 12:40
SNN
-
STL
33h 10m
2 stops
€608United Airlines
Tue, 1 Sep - Fri, 4 Sep
United Airlines Logo
07:01 - 10:15
STL
-
SNN
21h 14m
1 stop
United Airlines Logo
09:30 - 10:34
SNN
-
STL
31h 04m
1 stop
€609United Airlines
Tue, 1 Sep - Fri, 4 Sep
United Airlines Logo
07:01 - 10:15
STL
-
SNN
21h 14m
1 stop
United Airlines Logo
12:30 - 00:30
SNN
-
STL
18h 00m
2 stops
€612United Airlines
Tue, 1 Sep - Fri, 4 Sep
United Airlines Logo
15:10 - 07:30
STL
-
SNN
10h 20m
1 stop
United Airlines Logo
12:30 - 23:37
SNN
-
STL
17h 07m
1 stop
€656United Airlines
Sun, 16 Aug - Fri, 28 Aug
United Airlines Logo
13:18 - 10:15
STL
-
SNN
14h 57m
2 stops
United Airlines Logo
12:30 - 23:37
SNN
-
STL
17h 07m
1 stop
€660United Airlines
Sun, 16 Aug - Fri, 28 Aug
United Airlines Logo
11:10 - 10:15
STL
-
SNN
17h 05m
2 stops
United Airlines Logo
12:30 - 21:22
SNN
-
STL
14h 52m
2 stops
€671United Airlines
Tue, 1 Sep - Fri, 4 Sep
United Airlines Logo
18:55 - 07:30
STL
-
SNN
30h 35m
1 stop
United Airlines Logo
09:30 - 15:38
SNN
-
STL
12h 08m
1 stop
€703United Airlines
Sat, 15 Aug - Sun, 23 Aug
United Airlines Logo
16:40 - 07:30
STL
-
SNN
32h 50m
2 stops
United Airlines Logo
12:30 - 08:37
SNN
-
STL
26h 07m
2 stops
€711United Airlines
Fri, 21 Aug - Fri, 28 Aug
United Airlines Logo
16:40 - 10:15
STL
-
SNN
35h 35m
2 stops
United Airlines Logo
09:30 - 15:38
SNN
-
STL
12h 08m
1 stop
€712United Airlines
Sat, 15 Aug - Sun, 23 Aug

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United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets
United Airlines
1 Sept
STL20:30Lambert-St Louis
29h 00m
1 stop
SNN07:30Shannon
4 Sept
SNN09:30Shannon
14h 46m
1 stop
STL18:16Lambert-St Louis
€604
United Airlines
1 Sept
STL17:32Lambert-St Louis
31h 58m
1 stop
SNN07:30Shannon
4 Sept
SNN09:30Shannon
33h 10m
2 stops
STL12:40Lambert-St Louis
€608
United Airlines
1 Sept
STL07:01Lambert-St Louis
21h 14m
1 stop
SNN10:15Shannon
4 Sept
SNN09:30Shannon
31h 04m
1 stop
STL10:34Lambert-St Louis
€609

KLM flights from St. Louis to Shannon, Clare

Our best KLM deals on St. Louis to Shannon, Clare flight tickets
KLM
27 Aug
STL11:00Lambert-St Louis
18h 10m
2 stops
SNN11:10Shannon
7 Sept
SNN13:05Shannon
16h 32m
2 stops
STL23:37Lambert-St Louis
€753
KLM
18 Jun
STL19:12Lambert-St Louis
33h 58m
2 stops
SNN11:10Shannon
25 Jun
SNN13:05Shannon
31h 47m
2 stops
STL14:52Lambert-St Louis
€1,059

momondo Fare Finder

 
Customise your flight search to find flights from St. Louis to Shannon, Clare 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 May 2026.
Use the filters below to find and compare flights from St. Louis to Shannon, Clare that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 1/9

20:30-07:30

1 stop29h 00m

Shannon

Fri 4/9

09:30-18:16

1 stop14h 46m

€604

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 1/9

17:32-07:30

1 stop31h 58m

Shannon

Fri 4/9

09:30-12:40

2 stops33h 10m

€608

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 1/9

07:01-10:15

1 stop21h 14m

Shannon

Fri 4/9

09:30-10:34

1 stop31h 04m

€609

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 1/9

07:01-10:15

1 stop21h 14m

Shannon

Fri 4/9

12:30-00:30

2 stops18h 00m

€612
Fastest return journey

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

15:10-07:30

1 stop10h 20m

Shannon

Fri 28/8

12:30-23:37

1 stop17h 07m

€656

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 16/8

13:18-10:15

2 stops14h 57m

Shannon

Fri 28/8

12:30-23:37

1 stop17h 07m

€660

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 1/9

11:10-10:15

2 stops17h 05m

Shannon

Fri 4/9

12:30-21:22

2 stops14h 52m

€671

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 15/8

18:55-07:30

1 stop30h 35m

Shannon

Sun 23/8

09:30-15:38

1 stop12h 08m

€703

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 21/8

16:40-07:30

2 stops32h 50m

Shannon

Fri 28/8

12:30-08:37

2 stops26h 07m

€711

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 15/8

16:40-10:15

2 stops35h 35m

Shannon

Sun 23/8

09:30-15:38

1 stop12h 08m

€712

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from St. Louis to Shannon, Clare

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Shannon, Clare according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap St. Louis to Shannon, Clare (STL to SNN) flight deals and tips

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

Fastest flight time

12h 12m

Direct flights

None
The fastest flight from St. Louis to Shannon, Clare takes 12h 12m
There are no direct flights from St. Louis to Shannon, Clare. There are no popular flight routes from St. Louis to Shannon, Clare.
Search flight deals

Frequently asked questions about flying from St. Louis to Shannon, Clare

  • How far is Lambert-St Louis to Shannon by plane?

    Shannon is 6155.2 km away from Lambert-St Louis. 12h 12m is a normal flight duration for this route.

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

    Prices for flights from Lambert-St Louis Airport to Shannon Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Lambert-St Louis Airport to Shannon 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 Lambert-St Louis Airport to Shannon Airport.

  • What documentation or ID do you need to fly to Shannon Airport?

    The travel and health documents required for your trip to Shannon Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Shannon Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from St. Louis to Shannon, Clare

  • How do I get Price Alerts for flights from St. Louis to Shannon, Clare?

    Confirm your travel details to search for the latest offers for flights from St. Louis to Shannon, Clare. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from St. Louis to Shannon, Clare with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Limerick
Ennis
Tipperary
Killaloe
Nenagh
Adare
Bunratty
Lahinch

Why use momondo?

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

Finding the right flight to Shannon from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Shannon quick and easy, saving you time and money.

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

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

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

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

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

Price alerts on flights to Shannon from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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