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Cheap flights from St. Louis to Shannon from $649

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 3/12. 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

American Airlines Logo
2:21 pm - 11:30 amSTL-SNN
16h 09m2 stops
American Airlines Logo
7:50 am - 11:32 pmSNN-STL
20h 42m2 stops
$649American Airlines
Find Deal
jue., mar. 12 - jue., mar. 19
British Airways Logo
8:39 am - 7:25 pmSTL-SNN
28h 46m2 stops
British Airways Logo
5:30 pm - 8:24 pmSNN-STL
32h 54m2 stops
$731British Airways
Find Deal
dom., nov. 30 - lun., dic. 15
American Airlines Logo
10:22 am - 6:20 amSTL-SNN
14h 58m2 stops
American Airlines Logo
2:45 pm - 10:14 amSNN-STL
25h 29m2 stops
$749American Airlines
Find Deal
vie., oct. 31 - vie., nov. 7
Multiple Airlines Logo
5:24 pm - 3:45 pmSTL-SNN
17h 21m3 stops
Multiple Airlines Logo
7:50 am - 3:29 pmSNN-STL
37h 39m2 stops
$949Multiple Airlines
Find Deal
vie., oct. 31 - vie., nov. 7
Multiple Airlines Logo
5:24 pm - 3:45 pmSTL-SNN
17h 21m3 stops
Multiple Airlines Logo
8:05 pm - 3:29 pmSNN-STL
49h 24m2 stops
$952Multiple Airlines
Find Deal
vie., oct. 31 - mar., nov. 4
United Airlines Logo
6:30 am - 10:15 amSTL-SNN
21h 45m2 stops
United Airlines Logo
12:30 pm - 10:00 pmSNN-STL
15h 30m2 stops
$986United Airlines
Find Deal
vie., oct. 10 - mié., oct. 15
Air Canada Logo
4:05 pm - 4:45 pmSTL-SNN
19h 40m2 stops
Air Canada Logo
7:50 am - 10:27 amSNN-STL
31h 37m3 stops
$1,241Air Canada
Find Deal
jue., mar. 12 - jue., mar. 19
Air Canada Logo
5:24 pm - 3:45 pmSTL-SNN
17h 21m3 stops
Air Canada Logo
7:50 am - 9:40 pmSNN-STL
19h 50m3 stops
$1,257Air Canada
Find Deal
vie., oct. 31 - vie., nov. 7
United Airlines Logo
12:25 pm - 10:15 amSTL-SNN
15h 50m2 stops
United Airlines Logo
12:30 pm - 10:35 pmSNN-STL
16h 05m2 stops
$1,261United Airlines
Find Deal
mar., oct. 7 - sáb., oct. 11
Lufthansa Logo
12:29 pm - 10:15 amSTL-SNN
15h 46m1 stop
Lufthansa Logo
12:30 pm - 11:44 pmSNN-STL
17h 14m1 stop
$1,472Lufthansa
Find Deal
sáb., oct. 18 - lun., oct. 20

United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets
United Airlines
Oct 10
STL6:30 amLambert-St Louis
21h 45m
2 stops
SNN10:15 amShannon
Oct 15
SNN12:30 pmShannon
15h 30m
2 stops
STL10:00 pmLambert-St Louis
$986
Find similar
United Airlines
Sep 18
STL8:10 amLambert-St Louis
17h 20m
1 stop
SNN7:30 amShannon
Sep 22
SNN9:30 amShannon
10h 49m
1 stop
STL2:19 pmLambert-St Louis
$1,230
Find similar
United Airlines
Oct 7
STL12:25 pmLambert-St Louis
15h 50m
2 stops
SNN10:15 amShannon
Oct 11
SNN12:30 pmShannon
16h 05m
2 stops
STL10:35 pmLambert-St Louis
$1,261
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 12
STL2:21 pmLambert-St Louis
16h 09m
2 stops
SNN11:30 amShannon
Mar 19
SNN7:50 amShannon
20h 42m
2 stops
STL11:32 pmLambert-St Louis
$649
Find similar
American Airlines
Oct 31
STL10:22 amLambert-St Louis
14h 58m
2 stops
SNN6:20 amShannon
Nov 7
SNN2:45 pmShannon
25h 29m
2 stops
STL10:14 amLambert-St Louis
$749
Find similar
American Airlines
Oct 31
STL2:15 pmLambert-St Louis
16h 15m
2 stops
SNN11:30 amShannon
Nov 4
SNN7:50 amShannon
21h 17m
2 stops
STL11:07 pmLambert-St Louis
$750
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 septiembre 17, 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

jue. 3/12

2:21 pm-11:30 am

2 stops16h 09m

Shannon

jue. 3/19

7:50 am-11:32 pm

2 stops20h 42m

$649

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

dom. 11/30

8:39 am-7:25 pm

2 stops28h 46m

Shannon

lun. 12/15

5:30 pm-8:24 pm

2 stops32h 54m

$731

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

vie. 10/31

10:22 am-6:20 am

2 stops14h 58m

Shannon

vie. 11/7

2:45 pm-10:14 am

2 stops25h 29m

$749

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

vie. 10/31

5:24 pm-3:45 pm

3 stops17h 21m

Shannon

vie. 11/7

7:50 am-3:29 pm

2 stops37h 39m

$949

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

vie. 10/31

5:24 pm-3:45 pm

3 stops17h 21m

Shannon

mar. 11/4

8:05 pm-3:29 pm

2 stops49h 24m

$952

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

vie. 10/10

6:30 am-10:15 am

2 stops21h 45m

Shannon

mié. 10/15

12:30 pm-10:00 pm

2 stops15h 30m

$986

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

jue. 3/12

4:05 pm-4:45 pm

2 stops19h 40m

Shannon

jue. 3/19

7:50 am-10:27 am

3 stops31h 37m

$1,241

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

vie. 10/31

5:24 pm-3:45 pm

3 stops17h 21m

Shannon

vie. 11/7

7:50 am-9:40 pm

3 stops19h 50m

$1,257

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

mar. 10/7

12:25 pm-10:15 am

2 stops15h 50m

Shannon

sáb. 10/11

12:30 pm-10:35 pm

2 stops16h 05m

$1,261

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

sáb. 10/18

12:29 pm-10:15 am

1 stop15h 46m

Shannon

lun. 10/20

12:30 pm-11:44 pm

1 stop17h 14m

$1,472

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 9% 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 9h 54m.

  • 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
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $671Free CancellationRating
7.4
8,926 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
Adare
Bunratty
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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