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Cheap flights from St. Louis to Shannon from $513

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 9/17. 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
8:00 am - 7:30 am
STL
-
SNN
17h 30m
1 stop
United Airlines Logo
12:30 pm - 10:00 pm
SNN
-
STL
15h 30m
2 stops
$774United Airlines
Sun, Aug 23 - Tue, Sep 8
United Airlines Logo
4:50 pm - 10:15 am
STL
-
SNN
11h 25m
1 stop
United Airlines Logo
12:30 pm - 8:47 pm
SNN
-
STL
14h 17m
1 stop
$774United Airlines
Sun, Aug 23 - Tue, Sep 8
Delta Logo
9:15 am - 11:10 am
STL
-
SNN
19h 55m
2 stops
Delta Logo
1:05 pm - 11:42 pm
SNN
-
STL
16h 37m
2 stops
$774Delta
Sun, Aug 23 - Tue, Sep 8
Multiple Airlines Logo
10:33 am - 11:10 am
STL
-
SNN
18h 37m
2 stops
Multiple Airlines Logo
1:05 pm - 3:54 pm
SNN
-
STL
32h 49m
2 stops
$825Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
United Airlines Logo
8:00 am - 7:30 am
STL
-
SNN
17h 30m
1 stop
United Airlines Logo
12:30 pm - 11:38 pm
SNN
-
STL
17h 08m
1 stop
$833United Airlines
Wed, Sep 9 - Tue, Sep 22
United Airlines Logo
4:50 pm - 10:15 am
STL
-
SNN
11h 25m
1 stop
United Airlines Logo
9:30 am - 9:17 pm
SNN
-
STL
17h 47m
1 stop
$834United Airlines
Thu, Aug 20 - Thu, Aug 27
United Airlines Logo
3:32 pm - 7:30 am
STL
-
SNN
9h 58m
1 stop
United Airlines Logo
9:30 am - 3:38 pm
SNN
-
STL
12h 08m
1 stop
$834United Airlines
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
12:59 pm - 7:30 am
STL
-
SNN
12h 31m
1 stop
United Airlines Logo
12:30 pm - 8:47 pm
SNN
-
STL
14h 17m
1 stop
$834United Airlines
Thu, Sep 10 - Thu, Sep 17
Delta Logo
10:29 am - 11:10 am
STL
-
SNN
18h 41m
2 stops
Delta Logo
1:05 pm - 9:00 am
SNN
-
STL
25h 55m
2 stops
$838Delta
Thu, Sep 10 - Thu, Sep 17
Delta Logo
9:15 am - 11:10 am
STL
-
SNN
19h 55m
2 stops
Delta Logo
1:05 pm - 9:20 am
SNN
-
STL
26h 15m
2 stops
$878Delta
Sun, Aug 16 - Fri, Aug 28

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British Airways flights from St. Louis to Shannon, Clare

Our best British Airways deals on St. Louis to Shannon, Clare flight tickets
British Airways
Jan 20
STL1:06 pmLambert-St Louis
16h 24m
2 stops
SNN11:30 amShannon
Jan 28
SNN7:50 amShannon
14h 53m
2 stops
STL4:43 pmLambert-St Louis
$932
British Airways
Aug 15
STL7:38 pmLambert-St Louis
33h 42m
2 stops
SNN11:20 amShannon
Aug 23
SNN7:30 amShannon
17h 58m
2 stops
STL7:28 pmLambert-St Louis
$1,120
British Airways
Aug 15
STL7:38 pmLambert-St Louis
33h 42m
2 stops
SNN11:20 amShannon
Aug 23
SNN7:30 amShannon
17h 58m
2 stops
STL7:28 pmLambert-St Louis
$1,121

American Airlines flights from St. Louis to Shannon, Clare

Our best American Airlines deals on St. Louis to Shannon, Clare flight tickets
American Airlines
Jan 20
STL1:06 pmLambert-St Louis
16h 24m
2 stops
SNN11:30 amShannon
Jan 28
SNN2:45 pmShannon
29h 38m
1 stop
STL2:23 pmLambert-St Louis
$942
American Airlines
Nov 10
STL1:20 pmLambert-St Louis
16h 10m
2 stops
SNN11:30 amShannon
Dec 1
SNN2:45 pmShannon
26h 29m
1 stop
STL11:14 amLambert-St Louis
$977
American Airlines
Nov 10
STL9:50 amLambert-St Louis
14h 30m
1 stop
SNN6:20 amShannon
Dec 1
SNN2:45 pmShannon
26h 29m
1 stop
STL11:14 amLambert-St Louis
$986

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 July 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

Sun 8/23

8:00 am-7:30 am

1 stop17h 30m

Shannon

Tue 9/8

12:30 pm-10:00 pm

2 stops15h 30m

$774

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/23

4:50 pm-10:15 am

1 stop11h 25m

Shannon

Tue 9/8

12:30 pm-8:47 pm

1 stop14h 17m

$774

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/23

9:15 am-11:10 am

2 stops19h 55m

Shannon

Tue 9/8

1:05 pm-11:42 pm

2 stops16h 37m

$774

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 9/6

10:33 am-11:10 am

2 stops18h 37m

Shannon

Sun 9/13

1:05 pm-3:54 pm

2 stops32h 49m

$825

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

8:00 am-7:30 am

1 stop17h 30m

Shannon

Tue 9/22

12:30 pm-11:38 pm

1 stop17h 08m

$833

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 8/20

4:50 pm-10:15 am

1 stop11h 25m

Shannon

Thu 8/27

9:30 am-9:17 pm

1 stop17h 47m

$834
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 9/10

3:32 pm-7:30 am

1 stop9h 58m

Shannon

Thu 9/17

9:30 am-3:38 pm

1 stop12h 08m

$834

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 9/10

12:59 pm-7:30 am

1 stop12h 31m

Shannon

Thu 9/17

12:30 pm-8:47 pm

1 stop14h 17m

$834

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 9/10

10:29 am-11:10 am

2 stops18h 41m

Shannon

Thu 9/17

1:05 pm-9:00 am

2 stops25h 55m

$838

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

9:15 am-11:10 am

2 stops19h 55m

Shannon

Fri 8/28

1:05 pm-9:20 am

2 stops26h 15m

$878

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between St. Louis and Shannon, Clare?

Prices are currently typical for flights on this route.

Typical prices usually range from $608 to $936.
The lowest price recently found on this route was $774.

What is the cheapest month to fly to Shannon, Clare?

In general, February is the cheapest month to fly from St. Louis to Shannon, Clare. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you are unable to visit Shannon, Clare during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $0.

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 25m

Direct flights

None
The fastest flight from St. Louis to Shannon, Clare takes 11h 25m
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 25m.

  • 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 $596Free CancellationRating
7.4
10,041 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
Lahinch
Bunratty
Tipperary

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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