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Cheap flights from St. Louis to Shannon from $378

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Shannon departing on 7/11. 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
1 adult, Economy, 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
12:59 pm - 7:30 am
STL
-
SNN
12h 31m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$758United Airlines
Wed, Sep 9 - Sun, Sep 13
United Airlines Logo
5:10 am - 7:30 am
STL
-
SNN
20h 20m
2 stops
United Airlines Logo
12:30 pm - 9:36 pm
SNN
-
STL
15h 06m
2 stops
$763United Airlines
Wed, Sep 9 - Sun, Sep 13
United Airlines Logo
9:43 am - 7:30 am
STL
-
SNN
15h 47m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$770United Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
6:14 am - 7:30 am
STL
-
SNN
19h 16m
2 stops
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$771United Airlines
Mon, Aug 3 - Wed, Aug 19
United Airlines Logo
8:35 am - 10:15 am
STL
-
SNN
19h 40m
2 stops
United Airlines Logo
9:30 am - 10:00 pm
SNN
-
STL
18h 30m
1 stop
$774United Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
11:15 am - 10:15 am
STL
-
SNN
17h 00m
2 stops
United Airlines Logo
9:30 am - 10:00 pm
SNN
-
STL
18h 30m
1 stop
$775United Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
12:59 pm - 7:30 am
STL
-
SNN
12h 31m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$779United Airlines
Sun, Aug 16 - Fri, Aug 28
Delta Logo
3:39 pm - 11:10 am
STL
-
SNN
13h 31m
2 stops
Delta Logo
1:05 pm - 9:37 am
SNN
-
STL
26h 32m
2 stops
$783Delta
Sun, Aug 16 - Fri, Aug 28
KLM Logo
10:44 am - 11:10 am
STL
-
SNN
18h 26m
2 stops
KLM Logo
1:05 pm - 11:58 pm
SNN
-
STL
16h 53m
2 stops
$784KLM
Sun, Aug 16 - Fri, Aug 28
United Airlines Logo
7:30 am - 10:15 am
STL
-
SNN
20h 45m
1 stop
United Airlines Logo
12:30 pm - 9:09 pm
SNN
-
STL
14h 39m
1 stop
$820United Airlines
Thu, Oct 1 - Thu, Oct 8

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Air Canada flights from St. Louis to Shannon, Clare

Our best Air Canada deals on St. Louis to Shannon, Clare flight tickets
Air Canada
Sep 9
STL12:10 pmLambert-St Louis
22h 00m
2 stops
SNN4:10 pmShannon
Sep 22
SNN7:30 amShannon
20h 30m
3 stops
STL10:00 pmLambert-St Louis
$994
Air Canada
Aug 16
STL12:10 pmLambert-St Louis
17h 10m
2 stops
SNN11:20 amShannon
Aug 28
SNN7:30 amShannon
21h 29m
3 stops
STL10:59 pmLambert-St Louis
$1,003
Air Canada
Aug 16
STL12:10 pmLambert-St Louis
22h 00m
2 stops
SNN4:10 pmShannon
Aug 28
SNN7:30 amShannon
21h 29m
3 stops
STL10:59 pmLambert-St Louis
$1,035

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
STL12:59 pmLambert-St Louis
12h 31m
1 stop
SNN7:30 amShannon
Sep 13
SNN9:30 amShannon
12h 08m
1 stop
STL3:38 pmLambert-St Louis
$758
United Airlines
Sep 9
STL5:10 amLambert-St Louis
20h 20m
2 stops
SNN7:30 amShannon
Sep 13
SNN9:30 amShannon
14h 46m
1 stop
STL6:16 pmLambert-St Louis
$763
United Airlines
Sep 9
STL9:43 amLambert-St Louis
15h 47m
1 stop
SNN7:30 amShannon
Sep 22
SNN9:30 amShannon
12h 08m
1 stop
STL3:38 pmLambert-St Louis
$770

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 June 13, 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
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

12:59 pm-7:30 am

1 stop12h 31m

Shannon

Sun 9/13

9:30 am-3:38 pm

1 stop12h 08m

$758

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

5:10 am-7:30 am

2 stops20h 20m

Shannon

Sun 9/13

12:30 pm-9:36 pm

2 stops15h 06m

$763

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

9:43 am-7:30 am

1 stop15h 47m

Shannon

Tue 9/22

9:30 am-3:38 pm

1 stop12h 08m

$770

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 8/3

6:14 am-7:30 am

2 stops19h 16m

Shannon

Wed 8/19

9:30 am-3:38 pm

1 stop12h 08m

$771

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

8:35 am-10:15 am

2 stops19h 40m

Shannon

Tue 9/22

9:30 am-10:00 pm

1 stop18h 30m

$774

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

11:15 am-10:15 am

2 stops17h 00m

Shannon

Tue 9/22

9:30 am-10:00 pm

1 stop18h 30m

$775

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

12:59 pm-7:30 am

1 stop12h 31m

Shannon

Fri 8/28

9:30 am-3:38 pm

1 stop12h 08m

$779

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

3:39 pm-11:10 am

2 stops13h 31m

Shannon

Fri 8/28

1:05 pm-9:37 am

2 stops26h 32m

$783

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

10:44 am-11:10 am

2 stops18h 26m

Shannon

Fri 8/28

1:05 pm-11:58 pm

2 stops16h 53m

$784

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 10/1

7:30 am-10:15 am

1 stop20h 45m

Shannon

Thu 10/8

12:30 pm-9:09 pm

1 stop14h 39m

$820

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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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 6% 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

10h 08m

Direct flights

None
The fastest flight from St. Louis to Shannon, Clare takes 10h 08m
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 10h 08m.

  • 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
United AirlinesPriceFrom $546Free CancellationRating
7.4
9,815 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
Ennis
Bunratty
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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