What is the cheapest airline that flies from Lambert-St Louis to Shannon?

British Airways is the most popular carrier operating from Lambert-St Louis to Shannon

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?

The number of operators available for flights from Lambert-St Louis Airport to Shannon Airport is 1 as of November 2026.

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.

$636 Cheap Flights from St. Louis to Shannon, Clare in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Shannon

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:30 pm - 10:15 amSTL Lambert-St Louis-SNN Shannon

35h 45m2 stops Denver Intl Newark

12:30 pm - 11:25 pmSNN Shannon-STL Lambert-St Louis

16h 55m1 stop Newark

$739United Airlines

Sat, Apr 17 - Tue, Apr 20

4:30 pm - 10:15 amSTL Lambert-St Louis-SNN Shannon

35h 45m2 stops Denver Intl Newark

12:30 pm - 10:54 pmSNN Shannon-STL Lambert-St Louis

16h 24m2 stops Newark Chicago O'Hare Intl

$739United Airlines

Sat, Apr 17 - Tue, Apr 20

9:59 am - 5:50 amSTL Lambert-St Louis-SNN Shannon

13h 51m1 stop Boston Logan Intl

2:00 pm - 5:50 pmSNN Shannon-STL Lambert-St Louis

33h 50m1 stop Boston Logan Intl

$981Aer Lingus

Wed, Dec 2 - Wed, Dec 9

2:00 pm - 11:30 amSTL Lambert-St Louis-SNN Shannon

15h 30m2 stops Charlotte Douglas London Heathrow

7:50 am - 6:49 pmSNN Shannon-STL Lambert-St Louis

16h 59m2 stops London Heathrow Chicago O'Hare Intl

$982British Airways

Wed, Dec 2 - Wed, Dec 9

12:54 pm - 11:30 amSTL Lambert-St Louis-SNN Shannon

16h 36m2 stops Charlotte Douglas London Heathrow

7:50 am - 4:47 pmSNN Shannon-STL Lambert-St Louis

14h 57m2 stops London Heathrow Chicago O'Hare Intl

$982British Airways

Tue, Dec 1 - Thu, Dec 10

6:21 pm - 5:50 amSTL Lambert-St Louis-SNN Shannon

29h 29m1 stop Boston Logan Intl

2:00 pm - 9:29 amSNN Shannon-STL Lambert-St Louis

25h 29m1 stop Boston Logan Intl

$988Aer Lingus

Tue, Dec 1 - Thu, Dec 10

11:37 am - 11:30 amSTL Lambert-St Louis-SNN Shannon

17h 53m2 stops Chicago O'Hare Intl London Heathrow

8:05 pm - 12:16 amSNN Shannon-STL Lambert-St Louis

34h 11m2 stops London Heathrow Dallas/Fort Worth

$996British Airways

Sun, Dec 13 - Mon, Dec 21

1:14 pm - 11:30 amSTL Lambert-St Louis-SNN Shannon

16h 16m2 stops Chicago O'Hare Intl London Heathrow

2:00 pm - 9:29 amSNN Shannon-STL Lambert-St Louis

25h 29m1 stop Boston Logan Intl

$997Multiple Airlines

Tue, Dec 1 - Thu, Dec 10

5:38 pm - 4:45 pmSTL Lambert-St Louis-SNN Shannon

17h 07m2 stops Chicago O'Hare Intl London Heathrow

2:00 pm - 9:29 amSNN Shannon-STL Lambert-St Louis

25h 29m1 stop Boston Logan Intl

$998Multiple Airlines

Wed, Dec 2 - Wed, Dec 9

10:50 am - 11:30 amSTL Lambert-St Louis-SNN Shannon

18h 40m3 stops Chicago O'Hare Intl Toronto Pearson Intl London Heathrow

7:50 am - 3:26 pmSNN Shannon-STL Lambert-St Louis

37h 36m2 stops London Heathrow Toronto Pearson Intl

$1,009Multiple Airlines

Tue, Dec 1 - Thu, Dec 10

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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 17

STL4:30 pmLambert-St Louis

35h 45m

2 stops

SNN10:15 amShannon

Apr 20

SNN12:30 pmShannon

16h 24m

2 stops

STL10:54 pmLambert-St Louis

$739

United Airlines

Apr 17

STL5:20 pmLambert-St Louis

10h 55m

1 stop

SNN10:15 amShannon

Apr 20

SNN12:30 pmShannon

16h 55m

1 stop

STL11:25 pmLambert-St Louis

$773

Aer Lingus flights from St. Louis to Shannon, Clare

Our best Aer Lingus deals on St. Louis to Shannon, Clare flight tickets

Aer Lingus

Dec 2

STL9:59 amLambert-St Louis

13h 51m

1 stop

SNN5:50 amShannon

Dec 9

SNN2:00 pmShannon

33h 50m

1 stop

STL5:50 pmLambert-St Louis

$981

Aer Lingus

Dec 1

STL6:21 pmLambert-St Louis

29h 29m

1 stop

SNN5:50 amShannon

Dec 10

SNN2:00 pmShannon

25h 29m

1 stop

STL9:29 amLambert-St Louis

$988

Aer Lingus

Dec 13

STL9:59 amLambert-St Louis

13h 51m

1 stop

SNN5:50 amShannon

Dec 21

SNN2:00 pmShannon

25h 28m

1 stop

STL9:28 amLambert-St Louis

$1,032

momondo Fare Finder

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 Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Sat 4/17

4:30 pm-10:15 am

2 stops35h 45m

Shannon

Tue 4/20

12:30 pm-11:25 pm

1 stop16h 55m

$739

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Sat 4/17

4:30 pm-10:15 am

2 stops35h 45m

Shannon

Tue 4/20

12:30 pm-10:54 pm

2 stops16h 24m

$739

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Wed 12/2

9:59 am-5:50 am

1 stop13h 51m

Shannon

Wed 12/9

2:00 pm-5:50 pm

1 stop33h 50m

$981

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Wed 12/2

2:00 pm-11:30 am

2 stops15h 30m

Shannon

Wed 12/9

7:50 am-6:49 pm

2 stops16h 59m

$982

Quickest round-trip

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Tue 12/1

12:54 pm-11:30 am

2 stops16h 36m

Shannon

Thu 12/10

7:50 am-4:47 pm

2 stops14h 57m

$982

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Tue 12/1

6:21 pm-5:50 am

1 stop29h 29m

Shannon

Thu 12/10

2:00 pm-9:29 am

1 stop25h 29m

$988

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Sun 12/13

11:37 am-11:30 am

2 stops17h 53m

Shannon

Mon 12/21

8:05 pm-12:16 am

2 stops34h 11m

$996

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Tue 12/1

1:14 pm-11:30 am

2 stops16h 16m

Shannon

Thu 12/10

2:00 pm-9:29 am

1 stop25h 29m

$997

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Wed 12/2

5:38 pm-4:45 pm

2 stops17h 07m

Shannon

Wed 12/9

2:00 pm-9:29 am

1 stop25h 29m

$998

St. LouisShannon

STL Lambert-St Louis - SNN Shannon

STLSNN

Lambert-St Louis

Tue 12/1

10:50 am-11:30 am

3 stops18h 40m

Shannon

Thu 12/10

7:50 am-3:26 pm

2 stops37h 36m

$1,009

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first

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

Prices

Airlines

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.

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

You could potentially save up to 74% 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

Best Price Found	$636
Fastest flight time	17h 53m
Direct flights	None

The best one-way flight to Shannon, Clare from St. Louis in the past 72 hours is $636. The best round-trip flight deal from St. Louis to Shannon, Clare found on momondo in the last 72 hours is $739.

The fastest flight from St. Louis to Shannon, Clare takes 17h 53m

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 17h 53m.
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?
The number of operators available for flights from Lambert-St Louis Airport to Shannon Airport is 1 as of November 2026.
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?
Based on momondo bookings for flights between St. Louis and Shannon, Clare, the leading airline is United Airlines, making up 100% of the total bookings.

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 Airlines	PriceFrom $596	Free Cancellation	Rating 7.3 10,460 reviews		Search United Airlines flights

Limerick

Ennis

Adare

Bunratty

Lahinch

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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Cheap flights from St. Louis to Shannon from $636

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 11/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from St. Louis to Shannon, Clare

Our best United Airlines deals on St. Louis to Shannon, Clare flight tickets

Aer Lingus flights from St. Louis to Shannon, Clare

Our best Aer Lingus deals on St. Louis to Shannon, Clare flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Shannon, Clare that are best for you.

See travel insights to Shannon from

How to get the cheapest flight ticket from St. Louis to Shannon, Clare

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

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

What is the cheapest airline that flies from Lambert-St Louis to Shannon?

When to book flights from St. Louis to Shannon, Clare

Cheap St. Louis to Shannon, Clare (STL to SNN) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Shannon?

Why use momondo?

An easier way to manage your Shannon, Clare trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Fly your favorite airline to Shannon

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Shannon

List of cabin classes available on flights landing in Shannon. Availability may vary depending on flight origin and airline.

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