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Cheap flights from St. Louis to Shannon from $481

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 4/21. 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 round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
10:00 pm - 4:10 pm
STL
-
SNN
12h 10m1 stop
American Airlines Logo
7:40 am - 7:30 pm
SNN
-
STL
17h 50m1 stop
$481American Airlines
Tue, Apr 21 - Tue, May 5
American Airlines Logo
6:29 pm - 4:10 pm
STL
-
SNN
15h 41m2 stops
American Airlines Logo
9:15 pm - 7:30 pm
SNN
-
STL
28h 15m1 stop
$485American Airlines
Tue, Apr 21 - Tue, May 5
United Airlines Logo
11:15 am - 10:15 am
STL
-
SNN
17h 00m2 stops
United Airlines Logo
12:30 pm - 9:04 pm
SNN
-
STL
14h 34m2 stops
$492United Airlines
Tue, Apr 21 - Tue, May 5
American Airlines Logo
2:32 pm - 11:30 am
STL
-
SNN
15h 58m2 stops
American Airlines Logo
7:40 am - 6:07 pm
SNN
-
STL
16h 27m2 stops
$605American Airlines
Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
10:00 pm - 3:50 pm
STL
-
SNN
11h 50m1 stop
American Airlines Logo
7:40 am - 8:02 pm
SNN
-
STL
18h 22m2 stops
$620American Airlines
Fri, May 8 - Fri, May 22
Multiple Airlines Logo
4:05 pm - 11:30 am
STL
-
SNN
38h 25m2 stops
Multiple Airlines Logo
12:00 pm - 1:25 pm
SNN
-
STL
31h 25m1 stop
$629Multiple Airlines
Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
7:03 pm - 3:50 pm
STL
-
SNN
14h 47m2 stops
American Airlines Logo
7:40 am - 8:02 pm
SNN
-
STL
18h 22m2 stops
$654American Airlines
Fri, May 8 - Fri, May 22
Air Canada Logo
4:05 pm - 11:30 am
STL
-
SNN
13h 25m2 stops
Air Canada Logo
5:30 pm - 3:29 pm
SNN
-
STL
51h 59m2 stops
$683Air Canada
Fri, Jan 30 - Tue, Feb 3
Air Canada Logo
11:15 am - 11:20 am
STL
-
SNN
18h 05m3 stops
Air Canada Logo
7:40 am - 8:05 pm
SNN
-
STL
18h 25m2 stops
$684Air Canada
Tue, Apr 21 - Tue, May 5
Multiple Airlines Logo
4:05 pm - 7:25 pm
STL
-
SNN
21h 20m2 stops
Multiple Airlines Logo
7:50 am - 9:05 pm
SNN
-
STL
18h 15m3 stops
$693Multiple Airlines
Sat, Mar 7 - Sat, Mar 14

American Airlines flights from St. Louis to Shannon, Clare

Our best American Airlines deals on St. Louis to Shannon, Clare flight tickets
American Airlines
Apr 21
STL10:00 pmLambert-St Louis
12h 10m
1 stop
SNN4:10 pmShannon
May 5
SNN7:40 amShannon
17h 50m
1 stop
STL7:30 pmLambert-St Louis
$481
Find similar
American Airlines
Apr 21
STL6:29 pmLambert-St Louis
15h 41m
2 stops
SNN4:10 pmShannon
May 5
SNN9:15 pmShannon
28h 15m
1 stop
STL7:30 pmLambert-St Louis
$485
Find similar
American Airlines
Mar 25
STL2:32 pmLambert-St Louis
15h 58m
2 stops
SNN11:30 amShannon
Apr 4
SNN7:40 amShannon
16h 27m
2 stops
STL6:07 pmLambert-St Louis
$605
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
Apr 21
STL11:15 amLambert-St Louis
17h 00m
2 stops
SNN10:15 amShannon
May 5
SNN12:30 pmShannon
14h 34m
2 stops
STL9:04 pmLambert-St Louis
$492
Find similar
United Airlines
Jun 3
STL11:45 amLambert-St Louis
13h 45m
1 stop
SNN7:30 amShannon
Jun 11
SNN9:30 amShannon
10h 48m
1 stop
STL2:18 pmLambert-St Louis
$795
Find similar
United Airlines
Jun 3
STL6:30 amLambert-St Louis
19h 00m
2 stops
SNN7:30 amShannon
Jun 11
SNN9:30 amShannon
20h 13m
2 stops
STL11:43 pmLambert-St Louis
$800
Find similar

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 December 22, 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 4/21

10:00 pm-4:10 pm

1 stop12h 10m

Shannon

Tue 5/5

7:40 am-7:30 pm

1 stop17h 50m

$481

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

6:29 pm-4:10 pm

2 stops15h 41m

Shannon

Tue 5/5

9:15 pm-7:30 pm

1 stop28h 15m

$485

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

11:15 am-10:15 am

2 stops17h 00m

Shannon

Tue 5/5

12:30 pm-9:04 pm

2 stops14h 34m

$492

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

2:32 pm-11:30 am

2 stops15h 58m

Shannon

Sat 4/4

7:40 am-6:07 pm

2 stops16h 27m

$605

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 5/8

10:00 pm-3:50 pm

1 stop11h 50m

Shannon

Fri 5/22

7:40 am-8:02 pm

2 stops18h 22m

$620

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

4:05 pm-11:30 am

2 stops38h 25m

Shannon

Sat 4/4

12:00 pm-1:25 pm

1 stop31h 25m

$629

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 5/8

7:03 pm-3:50 pm

2 stops14h 47m

Shannon

Fri 5/22

7:40 am-8:02 pm

2 stops18h 22m

$654

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 1/30

4:05 pm-11:30 am

2 stops13h 25m

Shannon

Tue 2/3

5:30 pm-3:29 pm

2 stops51h 59m

$683

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

11:15 am-11:20 am

3 stops18h 05m

Shannon

Tue 5/5

7:40 am-8:05 pm

2 stops18h 25m

$684

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 3/7

4:05 pm-7:25 pm

2 stops21h 20m

Shannon

Sat 3/14

7:50 am-9:05 pm

3 stops18h 15m

$693

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

What is the cheapest day to depart on your flight to Shannon, Clare?

The cheapest day to depart from St. Louis to Shannon, Clare is on a Tuesday when prices can be found for as low as $718. The most expensive day to fly to Shannon, Clare is Saturday, with ticket prices averaging around $1,188.

What is the cheapest time of day to depart on your flight to Shannon, Clare?

Our data shows that the cheapest St. Louis to Shannon, Clare flights are usually those with departure times at noon. Our users have found flights to Shannon, Clare at noon for as low as $972. Flights in the morning are often more expensive with an average ticket price of $1,098.

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

You could potentially save up to 37% 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

13h 45m

Direct flights

None
The fastest flight from St. Louis to Shannon, Clare takes 13h 45m
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

  • 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 13h 45m.

  • 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 $548Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $641Free CancellationRating
7.4
9,102 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
Adare
Bunratty
Ennis
Nenagh
Lahinch

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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