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Cheap flights from St. Louis to Shannon from $708

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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:24 am - 7:30 am
STL
-
SNN
15h 06m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$708United Airlines
Wed, Sep 9 - Thu, Sep 17
United Airlines Logo
8:30 pm - 7:30 am
STL
-
SNN
29h 00m
1 stop
United Airlines Logo
9:30 am - 9:22 pm
SNN
-
STL
17h 52m
1 stop
$709United Airlines
Tue, Sep 1 - Fri, Sep 4
KLM Logo
10:55 am - 11:10 am
STL
-
SNN
18h 15m
2 stops
KLM Logo
1:05 pm - 11:37 pm
SNN
-
STL
16h 32m
2 stops
$713KLM
Wed, Sep 9 - Thu, Sep 17
United Airlines Logo
5:32 pm - 7:30 am
STL
-
SNN
31h 58m
1 stop
United Airlines Logo
12:30 pm - 12:13 pm
SNN
-
STL
29h 43m
2 stops
$714United Airlines
Tue, Sep 1 - Fri, Sep 4
United Airlines Logo
1:18 pm - 7:30 am
STL
-
SNN
12h 12m
1 stop
United Airlines Logo
9:30 am - 2:25 pm
SNN
-
STL
10h 55m
1 stop
$770United Airlines
Sun, Aug 16 - Fri, Aug 28
United Airlines Logo
1:18 pm - 10:15 am
STL
-
SNN
14h 57m
2 stops
United Airlines Logo
12:30 pm - 9:22 pm
SNN
-
STL
14h 52m
2 stops
$775United Airlines
Sun, Aug 16 - Fri, Aug 28
United Airlines Logo
6:55 pm - 7:30 am
STL
-
SNN
30h 35m
1 stop
United Airlines Logo
9:30 am - 2:25 pm
SNN
-
STL
10h 55m
1 stop
$826United Airlines
Sat, Aug 15 - Sat, Aug 22
United Airlines Logo
6:55 pm - 7:30 am
STL
-
SNN
30h 35m
1 stop
United Airlines Logo
9:30 am - 11:50 pm
SNN
-
STL
20h 20m
2 stops
$830United Airlines
Sat, Aug 15 - Sat, Aug 22
United Airlines Logo
5:32 pm - 10:15 am
STL
-
SNN
34h 43m
2 stops
United Airlines Logo
12:30 pm - 10:09 am
SNN
-
STL
27h 39m
2 stops
$836United Airlines
Sat, Aug 15 - Sat, Aug 22
United Airlines Logo
1:18 pm - 10:15 am
STL
-
SNN
14h 57m
2 stops
United Airlines Logo
12:30 pm - 9:22 pm
SNN
-
STL
14h 52m
2 stops
$838United Airlines
Tue, Sep 1 - Fri, Sep 4

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Lufthansa flights from St. Louis to Shannon, Clare

Our best Lufthansa deals on St. Louis to Shannon, Clare flight tickets
Lufthansa
Aug 15
STL6:55 pmLambert-St Louis
30h 35m
1 stop
SNN7:30 amShannon
Aug 22
SNN12:30 pmShannon
17h 07m
1 stop
STL11:37 pmLambert-St Louis
$949
Lufthansa
Aug 27
STL1:18 pmLambert-St Louis
12h 12m
1 stop
SNN7:30 amShannon
Sep 7
SNN12:30 pmShannon
17h 07m
1 stop
STL11:37 pmLambert-St Louis
$999
Lufthansa
Aug 27
STL1:18 pmLambert-St Louis
12h 12m
1 stop
SNN7:30 amShannon
Sep 7
SNN12:30 pmShannon
17h 07m
1 stop
STL11:37 pmLambert-St Louis
$1,032

United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets
United Airlines
Sep 9
STL10:24 amLambert-St Louis
15h 06m
1 stop
SNN7:30 amShannon
Sep 17
SNN9:30 amShannon
12h 08m
1 stop
STL3:38 pmLambert-St Louis
$708
United Airlines
Sep 1
STL8:30 pmLambert-St Louis
29h 00m
1 stop
SNN7:30 amShannon
Sep 4
SNN9:30 amShannon
17h 52m
1 stop
STL9:22 pmLambert-St Louis
$709
United Airlines
Sep 1
STL5:32 pmLambert-St Louis
31h 58m
1 stop
SNN7:30 amShannon
Sep 4
SNN12:30 pmShannon
29h 43m
2 stops
STL12:13 pmLambert-St Louis
$714

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated April 28, 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 round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

10:24 am-7:30 am

1 stop15h 06m

Shannon

Thu 9/17

9:30 am-3:38 pm

1 stop12h 08m

$708

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

8:30 pm-7:30 am

1 stop29h 00m

Shannon

Fri 9/4

9:30 am-9:22 pm

1 stop17h 52m

$709

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

10:55 am-11:10 am

2 stops18h 15m

Shannon

Thu 9/17

1:05 pm-11:37 pm

2 stops16h 32m

$713

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

5:32 pm-7:30 am

1 stop31h 58m

Shannon

Fri 9/4

12:30 pm-12:13 pm

2 stops29h 43m

$714
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

1:18 pm-7:30 am

1 stop12h 12m

Shannon

Fri 8/28

9:30 am-2:25 pm

1 stop10h 55m

$770

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

1:18 pm-10:15 am

2 stops14h 57m

Shannon

Fri 8/28

12:30 pm-9:22 pm

2 stops14h 52m

$775

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 8/15

6:55 pm-7:30 am

1 stop30h 35m

Shannon

Sat 8/22

9:30 am-2:25 pm

1 stop10h 55m

$826

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 8/15

6:55 pm-7:30 am

1 stop30h 35m

Shannon

Sat 8/22

9:30 am-11:50 pm

2 stops20h 20m

$830

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 8/15

5:32 pm-10:15 am

2 stops34h 43m

Shannon

Sat 8/22

12:30 pm-10:09 am

2 stops27h 39m

$836

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 9/1

1:18 pm-10:15 am

2 stops14h 57m

Shannon

Fri 9/4

12:30 pm-9:22 pm

2 stops14h 52m

$838

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Shannon from

How to get the cheapest flight ticket from St. Louis to Shannon, Clare

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

Can stopping save me money on St. Louis to Shannon, Clare flights?

You could potentially save up to 20% on your flight if you consider stops on a St. Louis to Shannon, Clare flight.

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 round-trip 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

11h 27m

Direct flights

None
The fastest flight from St. Louis to Shannon, Clare takes 11h 27m
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?

    The straight-line distance from Lambert-St Louis to Shannon is 3824.7 mi. By plane, this route typically takes 11h 27m.

  • 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 updated daily.

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

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 you'll need for your trip to Shannon Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Shannon Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Shannon, Clare?

Best airlines flying from St. Louis to Shannon, Clare

Compare and see reviews for airlines that fly from St. Louis to Shannon, Clare with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $483Free CancellationRating
7.1
11,677 reviews
Search American Airlines flights
United AirlinesPriceFrom $546Free CancellationRating
7.4
9,672 reviews
Search United Airlines flights

Traveling to a place near Shannon?

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

Why use momondo?

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

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

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

Yes. All flights to Shannon from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Shannon from St. Louis.

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

Yes momondo offers price alerts on flights to Shannon from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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