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Cheap flights from St. Louis to Shannon from $540

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 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
United Airlines Logo
6:15 am - 10:15 amSTL-SNN
22h 00m2 stops
United Airlines Logo
12:30 pm - 9:42 amSNN-STL
27h 12m2 stops
$540United Airlines
Find Deal
Wed, Apr 15 - Tue, Apr 28
American Airlines Logo
7:05 pm - 4:45 pmSTL-SNN
16h 40m2 stops
American Airlines Logo
7:40 am - 9:48 pmSNN-STL
20h 08m2 stops
$683American Airlines
Find Deal
Wed, Mar 25 - Sat, Apr 4
American Airlines Logo
2:36 pm - 11:30 amSTL-SNN
15h 54m2 stops
American Airlines Logo
7:40 am - 9:48 pmSNN-STL
20h 08m2 stops
$690American Airlines
Find Deal
Wed, Mar 25 - Sat, Apr 4
Multiple Airlines Logo
4:05 pm - 4:45 pmSTL-SNN
19h 40m2 stops
Multiple Airlines Logo
12:30 pm - 7:48 pmSNN-STL
13h 18m1 stop
$772Multiple Airlines
Find Deal
Wed, Mar 25 - Sat, Apr 4
Air Canada Logo
4:05 pm - 3:45 pmSTL-SNN
18h 40m2 stops
Air Canada Logo
7:40 am - 3:24 pmSNN-STL
37h 44m2 stops
$781Air Canada
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Fri, Mar 27 - Tue, Mar 31
Multiple Airlines Logo
4:05 pm - 4:45 pmSTL-SNN
19h 40m2 stops
Multiple Airlines Logo
7:40 am - 9:04 pmSNN-STL
19h 24m3 stops
$841Multiple Airlines
Find Deal
Wed, Mar 25 - Sat, Apr 4
Air Canada Logo
11:25 am - 11:30 amSTL-SNN
19h 05m3 stops
Air Canada Logo
7:40 am - 9:04 pmSNN-STL
19h 24m3 stops
$845Air Canada
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Wed, Mar 25 - Sat, Apr 4
Multiple Airlines Logo
10:30 am - 11:20 amSTL-SNN
18h 50m3 stops
Multiple Airlines Logo
7:40 am - 3:24 pmSNN-STL
37h 44m2 stops
$878Multiple Airlines
Find Deal
Wed, Apr 15 - Tue, Apr 28
American Airlines Logo
2:21 pm - 6:20 amSTL-SNN
10h 59m1 stop
American Airlines Logo
7:40 am - 9:48 pmSNN-STL
20h 08m2 stops
$892American Airlines
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Fri, Mar 27 - Tue, Mar 31
Lufthansa Logo
11:45 am - 10:15 amSTL-SNN
16h 30m1 stop
Lufthansa Logo
12:30 pm - 7:48 pmSNN-STL
13h 18m1 stop
$911Lufthansa
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Wed, Apr 15 - Tue, Apr 28

Air Canada flights from St. Louis to Shannon, Clare

Our best Air Canada deals on St. Louis to Shannon, Clare flight tickets
Air Canada
Mar 27
STL4:05 pmLambert-St Louis
18h 40m
2 stops
SNN3:45 pmShannon
Mar 31
SNN7:40 amShannon
37h 44m
2 stops
STL3:24 pmLambert-St Louis
$781
Find similar
Air Canada
Mar 25
STL11:25 amLambert-St Louis
19h 05m
3 stops
SNN11:30 amShannon
Apr 4
SNN7:40 amShannon
19h 24m
3 stops
STL9:04 pmLambert-St Louis
$845
Find similar
Air Canada
Mar 25
STL1:10 pmLambert-St Louis
17h 20m
3 stops
SNN11:30 amShannon
Apr 4
SNN7:40 amShannon
19h 24m
3 stops
STL9:04 pmLambert-St Louis
$1,059
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
Mar 25
STL7:05 pmLambert-St Louis
16h 40m
2 stops
SNN4:45 pmShannon
Apr 4
SNN7:40 amShannon
20h 08m
2 stops
STL9:48 pmLambert-St Louis
$683
Find similar
American Airlines
Mar 25
STL2:36 pmLambert-St Louis
15h 54m
2 stops
SNN11:30 amShannon
Apr 4
SNN7:40 amShannon
20h 08m
2 stops
STL9:48 pmLambert-St Louis
$690
Find similar
American Airlines
Mar 27
STL2:21 pmLambert-St Louis
10h 59m
1 stop
SNN6:20 amShannon
Mar 31
SNN7:40 amShannon
20h 08m
2 stops
STL9:48 pmLambert-St Louis
$892
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 November 6, 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

Wed 4/15

6:15 am-10:15 am

2 stops22h 00m

Shannon

Tue 4/28

12:30 pm-9:42 am

2 stops27h 12m

$540

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

7:05 pm-4:45 pm

2 stops16h 40m

Shannon

Sat 4/4

7:40 am-9:48 pm

2 stops20h 08m

$683

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

2:36 pm-11:30 am

2 stops15h 54m

Shannon

Sat 4/4

7:40 am-9:48 pm

2 stops20h 08m

$690

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

4:05 pm-4:45 pm

2 stops19h 40m

Shannon

Sat 4/4

12:30 pm-7:48 pm

1 stop13h 18m

$772

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 3/27

4:05 pm-3:45 pm

2 stops18h 40m

Shannon

Tue 3/31

7:40 am-3:24 pm

2 stops37h 44m

$781

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

4:05 pm-4:45 pm

2 stops19h 40m

Shannon

Sat 4/4

7:40 am-9:04 pm

3 stops19h 24m

$841

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 3/25

11:25 am-11:30 am

3 stops19h 05m

Shannon

Sat 4/4

7:40 am-9:04 pm

3 stops19h 24m

$845

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/15

10:30 am-11:20 am

3 stops18h 50m

Shannon

Tue 4/28

7:40 am-3:24 pm

2 stops37h 44m

$878

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 3/27

2:21 pm-6:20 am

1 stop10h 59m

Shannon

Tue 3/31

7:40 am-9:48 pm

2 stops20h 08m

$892

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/15

11:45 am-10:15 am

1 stop16h 30m

Shannon

Tue 4/28

12:30 pm-7:48 pm

1 stop13h 18m

$911

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

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.
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 10h 59m.

  • 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 $582Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
United AirlinesPriceFrom $671Free CancellationRating
7.4
9,007 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
Lahinch
Ennis
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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