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Cheap flights from St. Louis to Shannon from €450

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 5/5. 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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Cheap return flights

Enter your travel dates to find the best prices.
American Airlines Logo
22:00 - 20:35STL-SNN
16h 35m1 stop
American Airlines Logo
21:15 - 19:30SNN-STL
28h 15m1 stop
€450American Airlines
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Tue, 5 May - Tue, 12 May
American Airlines Logo
14:19 - 11:20STL-SNN
15h 01m2 stops
American Airlines Logo
21:15 - 19:30SNN-STL
28h 15m1 stop
€453American Airlines
Find Deal
Tue, 5 May - Tue, 12 May
American Airlines Logo
19:03 - 16:10STL-SNN
15h 07m2 stops
American Airlines Logo
07:40 - 19:03SNN-STL
17h 23m2 stops
€462American Airlines
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Tue, 5 May - Tue, 12 May
United Airlines Logo
06:15 - 10:15STL-SNN
22h 00m2 stops
United Airlines Logo
12:30 - 23:43SNN-STL
17h 13m2 stops
€491United Airlines
Find Deal
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
16:05 - 11:30STL-SNN
38h 25m2 stops
Multiple Airlines Logo
12:00 - 22:59SNN-STL
16h 59m2 stops
€535Multiple Airlines
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Wed, 25 Mar - Sat, 4 Apr
Multiple Airlines Logo
16:05 - 16:45STL-SNN
19h 40m2 stops
Multiple Airlines Logo
12:30 - 19:48SNN-STL
13h 18m1 stop
€541Multiple Airlines
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Wed, 25 Mar - Sat, 4 Apr
United Airlines Logo
06:00 - 10:15STL-SNN
22h 15m2 stops
United Airlines Logo
12:30 - 19:48SNN-STL
13h 18m1 stop
€556United Airlines
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Thu, 16 Apr - Sat, 25 Apr
British Airways Logo
12:11 - 11:30STL-SNN
41h 19m2 stops
British Airways Logo
07:50 - 18:16SNN-STL
16h 26m2 stops
€574British Airways
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Tue, 6 Jan - Tue, 13 Jan
American Airlines Logo
15:22 - 11:30STL-SNN
14h 08m2 stops
American Airlines Logo
07:50 - 21:15SNN-STL
19h 25m2 stops
€575American Airlines
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Mon, 15 Dec - Wed, 11 Feb
American Airlines Logo
22:00 - 16:10STL-SNN
12h 10m1 stop
American Airlines Logo
21:15 - 19:30SNN-STL
28h 15m1 stop
€584American Airlines
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Tue, 12 May - Tue, 19 May

American Airlines flights from St. Louis to Shannon, Clare

Our best American Airlines deals on St. Louis to Shannon, Clare flight tickets
American Airlines
5 May
STL22:00Lambert-St Louis
16h 35m
1 stop
SNN20:35Shannon
12 May
SNN21:15Shannon
28h 15m
1 stop
STL19:30Lambert-St Louis
€450
Find similar
American Airlines
5 May
STL14:19Lambert-St Louis
15h 01m
2 stops
SNN11:20Shannon
12 May
SNN21:15Shannon
28h 15m
1 stop
STL19:30Lambert-St Louis
€453
Find similar
American Airlines
5 May
STL19:03Lambert-St Louis
15h 07m
2 stops
SNN16:10Shannon
12 May
SNN07:40Shannon
17h 23m
2 stops
STL19:03Lambert-St Louis
€462
Find similar

United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets
United Airlines
5 May
STL06:15Lambert-St Louis
22h 00m
2 stops
SNN10:15Shannon
12 May
SNN12:30Shannon
17h 13m
2 stops
STL23:43Lambert-St Louis
€491
Find similar
United Airlines
16 Apr
STL06:00Lambert-St Louis
22h 15m
2 stops
SNN10:15Shannon
25 Apr
SNN12:30Shannon
13h 18m
1 stop
STL19:48Lambert-St Louis
€556
Find similar
United Airlines
16 Apr
STL17:20Lambert-St Louis
10h 55m
1 stop
SNN10:15Shannon
26 Apr
SNN12:30Shannon
13h 18m
1 stop
STL19:48Lambert-St Louis
€691
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 22 November 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

Tue 5/5

22:00-20:35

1 stop16h 35m

Shannon

Tue 12/5

21:15-19:30

1 stop28h 15m

€450

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

14:19-11:20

2 stops15h 01m

Shannon

Tue 12/5

21:15-19:30

1 stop28h 15m

€453

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

19:03-16:10

2 stops15h 07m

Shannon

Tue 12/5

07:40-19:03

2 stops17h 23m

€462

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

06:15-10:15

2 stops22h 00m

Shannon

Tue 12/5

12:30-23:43

2 stops17h 13m

€491

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 25/3

16:05-11:30

2 stops38h 25m

Shannon

Sat 4/4

12:00-22:59

2 stops16h 59m

€535

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 25/3

16:05-16:45

2 stops19h 40m

Shannon

Sat 4/4

12:30-19:48

1 stop13h 18m

€541

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 16/4

06:00-10:15

2 stops22h 15m

Shannon

Sat 25/4

12:30-19:48

1 stop13h 18m

€556

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 6/1

12:11-11:30

2 stops41h 19m

Shannon

Tue 13/1

07:50-18:16

2 stops16h 26m

€574

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 15/12

15:22-11:30

2 stops14h 08m

Shannon

Wed 11/2

07:50-21:15

2 stops19h 25m

€575

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 12/5

22:00-16:10

1 stop12h 10m

Shannon

Tue 19/5

21:15-19:30

1 stop28h 15m

€584

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. 10h 55m 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
Adare
Killaloe
Lahinch
Bunratty

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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