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Cheap flights from St. Louis to Shannon from €549

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 12/3. 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

American Airlines Logo
14:21 - 11:30STL-SNN
16h 09m2 stops
American Airlines Logo
07:50 - 23:32SNN-STL
20h 42m2 stops
€549American Airlines
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Thu, 12 Mar - Thu, 19 Mar
British Airways Logo
08:39 - 19:25STL-SNN
28h 46m2 stops
British Airways Logo
17:30 - 20:24SNN-STL
32h 54m2 stops
€618British Airways
Find Deal
Sun, 30 Nov - Mon, 15 Dec
American Airlines Logo
10:22 - 06:20STL-SNN
14h 58m2 stops
American Airlines Logo
14:45 - 10:14SNN-STL
25h 29m2 stops
€634American Airlines
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Fri, 31 Oct - Fri, 7 Nov
Multiple Airlines Logo
17:24 - 15:45STL-SNN
17h 21m3 stops
Multiple Airlines Logo
07:50 - 15:29SNN-STL
37h 39m2 stops
€803Multiple Airlines
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Fri, 31 Oct - Fri, 7 Nov
Multiple Airlines Logo
17:24 - 15:45STL-SNN
17h 21m3 stops
Multiple Airlines Logo
20:05 - 15:29SNN-STL
49h 24m2 stops
€805Multiple Airlines
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Fri, 31 Oct - Tue, 4 Nov
United Airlines Logo
06:30 - 10:15STL-SNN
21h 45m2 stops
United Airlines Logo
12:30 - 22:00SNN-STL
15h 30m2 stops
€834United Airlines
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Fri, 10 Oct - Wed, 15 Oct
Air Canada Logo
16:05 - 16:45STL-SNN
19h 40m2 stops
Air Canada Logo
07:50 - 10:27SNN-STL
31h 37m3 stops
€1,050Air Canada
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Thu, 12 Mar - Thu, 19 Mar
Air Canada Logo
17:24 - 15:45STL-SNN
17h 21m3 stops
Air Canada Logo
07:50 - 21:40SNN-STL
19h 50m3 stops
€1,063Air Canada
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Fri, 31 Oct - Fri, 7 Nov
United Airlines Logo
17:24 - 10:15STL-SNN
10h 51m1 stop
United Airlines Logo
12:30 - 21:58SNN-STL
15h 28m2 stops
€1,067United Airlines
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Tue, 7 Oct - Sat, 11 Oct
Lufthansa Logo
12:29 - 10:15STL-SNN
15h 46m1 stop
Lufthansa Logo
12:30 - 23:44SNN-STL
17h 14m1 stop
€1,245Lufthansa
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Sat, 18 Oct - Mon, 20 Oct

United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets
United Airlines
10 Oct
STL06:30Lambert-St Louis
21h 45m
2 stops
SNN10:15Shannon
15 Oct
SNN12:30Shannon
15h 30m
2 stops
STL22:00Lambert-St Louis
€834
Find similar
United Airlines
18 Sept
STL08:10Lambert-St Louis
17h 20m
1 stop
SNN07:30Shannon
22 Sept
SNN09:30Shannon
10h 49m
1 stop
STL14:19Lambert-St Louis
€1,041
Find similar
United Airlines
7 Oct
STL17:24Lambert-St Louis
10h 51m
1 stop
SNN10:15Shannon
11 Oct
SNN12:30Shannon
15h 28m
2 stops
STL21:58Lambert-St Louis
€1,067
Find similar

American Airlines flights from St. Louis to Shannon, Clare

Our best American Airlines deals on St. Louis to Shannon, Clare flight tickets
American Airlines
12 Mar
STL14:21Lambert-St Louis
16h 09m
2 stops
SNN11:30Shannon
19 Mar
SNN07:50Shannon
20h 42m
2 stops
STL23:32Lambert-St Louis
€549
Find similar
American Airlines
31 Oct
STL10:22Lambert-St Louis
14h 58m
2 stops
SNN06:20Shannon
7 Nov
SNN14:45Shannon
25h 29m
2 stops
STL10:14Lambert-St Louis
€634
Find similar
American Airlines
31 Oct
STL14:15Lambert-St Louis
16h 15m
2 stops
SNN11:30Shannon
4 Nov
SNN07:50Shannon
21h 17m
2 stops
STL23:07Lambert-St Louis
€635
Find similar

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 17 September 2025.
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

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 12/3

14:21-11:30

2 stops16h 09m

Shannon

Thu 19/3

07:50-23:32

2 stops20h 42m

€549

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 30/11

08:39-19:25

2 stops28h 46m

Shannon

Mon 15/12

17:30-20:24

2 stops32h 54m

€618

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 31/10

10:22-06:20

2 stops14h 58m

Shannon

Fri 7/11

14:45-10:14

2 stops25h 29m

€634

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 31/10

17:24-15:45

3 stops17h 21m

Shannon

Fri 7/11

07:50-15:29

2 stops37h 39m

€803

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 31/10

17:24-15:45

3 stops17h 21m

Shannon

Tue 4/11

20:05-15:29

2 stops49h 24m

€805

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 10/10

06:30-10:15

2 stops21h 45m

Shannon

Wed 15/10

12:30-22:00

2 stops15h 30m

€834

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 12/3

16:05-16:45

2 stops19h 40m

Shannon

Thu 19/3

07:50-10:27

3 stops31h 37m

€1,050

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 31/10

17:24-15:45

3 stops17h 21m

Shannon

Fri 7/11

07:50-21:40

3 stops19h 50m

€1,063

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 7/10

17:24-10:15

1 stop10h 51m

Shannon

Sat 11/10

12:30-21:58

2 stops15h 28m

€1,067

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 18/10

12:29-10:15

1 stop15h 46m

Shannon

Mon 20/10

12:30-23:44

1 stop17h 14m

€1,245

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

Direct flights

None
There are no direct flights from St. Louis to Shannon, Clare. There are no popular flight routes from St. Louis to Shannon, Clare.
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  • How far is Lambert-St Louis to Shannon by plane?

    Shannon is 6155.2 km away from Lambert-St Louis. 14h 19m 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.

  • 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
Nenagh
Tipperary
Killaloe
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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