How long is the flight from St. Louis to Shannon, Clare?

Departing from St. Louis to Shannon, Clare will take you 10h 55m. The distance between St. Louis and Shannon, Clare is about 3824 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from St. Louis to Shannon, Clare round-trip?

Cheapflights users have booked flights from St. Louis to Shannon, Clare round-trip from $548. Another airline that can offer you cheap pricing is United Airlines. American Airlines is priced at 30% lower than the current average price of a flight leaving 3 months from now.

In terms of precipitation, rainfall in Shannon, Clare ranges from 2.3 - 4.1 inches per month. October is typically the wettest month, when rainfall can reach 4.1 in. April is typically the driest time to visit Shannon, Clare when rainfall is around 2.3 in.

If weather is an important factor for your trip to Shannon, Clare, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

What is the cheapest time of day to fly from STL to SNN?

When flying from St. Louis to Shannon, Clare, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on St. Louis-Shannon, Clare flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Shannon, Clare flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Shannon, Clare flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Shannon, Clare flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Shannon, Clare flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Shannon that include hotel bookings?

Yes. In addition to deals on St. Louis to Shannon flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Shannon?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Shannon.

Can I find deals for business class flights from St. Louis to Shannon?

Yes. Cheapflights offers flight deals from St. Louis to Shannon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$419+ Flights from St. Louis to Shannon

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1. Tell us where you want to go

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Cheap flight deals from St. Louis to Shannon

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$419 (American Airlines)
Popular in	June
Cheapest in	December
Average price	$483

Provider with most accurate pricing for Lambert-St Louis-Shannon flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Shannon flights.

Search Deals

From Lambert-St Louis to Shannon

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($144 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Find flight deals from St. Louis to Shannon

Cheapest flights from St. Louis to Shannon
Explore the most affordable flight options available from St. Louis to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 1, 2025.

Tue 12/22:05 pmSTL - SNN

2 stops15h 25mAmerican Airlines

Thu 12/117:50 amSNN - STL

2 stops19h 38mAmerican Airlines

Deal found 11/29

$484

Tue 12/24:05 pmSTL - SNN

2 stops13h 25mMultiple Airlines

Thu 12/117:50 amSNN - STL

3 stops19h 50mMultiple Airlines

Deal found 11/29

$931

Tue 12/211:25 amSTL - SNN

3 stops18h 05mAir Canada

Thu 12/117:50 amSNN - STL

3 stops19h 50mAir Canada

Deal found 11/29

$2,784

Best flights from St. Louis to Shannon
Discover carefully curated flight deals from St. Louis to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 1, 2025.

Tue 4/2110:00 pmSTL - SNN

1 stop16h 35mAmerican Airlines

Tue 5/59:15 pmSNN - STL

1 stop28h 15mAmerican Airlines

Deal found 11/30

$419

Tue 4/215:20 pmSTL - SNN

1 stop10h 55mUnited Airlines

Tue 5/512:30 pmSNN - STL

1 stop13h 18mUnited Airlines

Deal found 11/30

$437

Tue 5/52:19 pmSTL - SNN

2 stops15h 01mAmerican Airlines

Tue 5/129:15 pmSNN - STL

1 stop28h 15mAmerican Airlines

Deal found 11/30

$424

Sun 4/196:00 amSTL - SNN

2 stops22h 15mUnited Airlines

Tue 5/512:30 pmSNN - STL

2 stops15h 36mUnited Airlines

Deal found 11/30

$467

Mon 4/2010:09 amSTL - SNN

2 stops18h 06mUnited Airlines

Tue 5/512:30 pmSNN - STL

2 stops27h 12mUnited Airlines

Deal found 11/30

$467

Wed 4/156:00 amSTL - SNN

2 stops22h 15mUnited Airlines

Tue 5/512:30 pmSNN - STL

1 stop13h 18mUnited Airlines

Deal found 11/30

$467

Last-minute flights from St. Louis to Shannon
Discover last-minute flight deals from St. Louis to Shannon. Data last updated December 1, 2025 and is based on user searches.

Tue 12/22:05 pmSTL - SNN

2 stops15h 25mAmerican Airlines

Thu 12/117:50 amSNN - STL

2 stops19h 38mAmerican Airlines

Deal found 11/29

$484

Tue 12/24:05 pmSTL - SNN

2 stops13h 25mMultiple Airlines

Thu 12/117:50 amSNN - STL

3 stops19h 50mMultiple Airlines

Deal found 11/29

$931

Tue 12/211:25 amSTL - SNN

3 stops18h 05mAir Canada

Thu 12/117:50 amSNN - STL

3 stops19h 50mAir Canada

Deal found 11/29

$2,784

Fly from

Fly to

Route

Depart

Return

Price

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

10:00 pm-8:35 pm

1 stop16h 35m

Shannon

Tue 5/5

9:15 pm-7:30 pm

1 stop28h 15m

$419

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/5

2:19 pm-11:20 am

2 stops15h 01m

Shannon

Tue 5/12

9:15 pm-7:30 pm

1 stop28h 15m

$424

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

5:20 pm-10:15 am

1 stop10h 55m

Shannon

Tue 5/5

12:30 pm-7:48 pm

1 stop13h 18m

$437

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 4/19

6:00 am-10:15 am

2 stops22h 15m

Shannon

Tue 5/5

12:30 pm-10:06 pm

2 stops15h 36m

$467

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 4/20

10:09 am-10:15 am

2 stops18h 06m

Shannon

Tue 5/5

12:30 pm-9:42 am

2 stops27h 12m

$467

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/15

6:00 am-10:15 am

2 stops22h 15m

Shannon

Tue 5/5

12:30 pm-7:48 pm

1 stop13h 18m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/30

Compare providers for flights from St. Louis to Shannon

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Shannon in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Shannon, Clare flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Shannon, Clare flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Shannon, Clare flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Shannon, Clare flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Shannon, Clare flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Shannon

What is the cheapest month to book a flight from St. Louis to Shannon, Clare?

Currently, December is the cheapest month in which you can book a flight from St. Louis to Shannon, Clare (average of $483). Flying from St. Louis to Shannon, Clare in June is currently the most expensive (average of $752). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Shannon

See what other customers who have flown with United Airlines and American Airlines from St. Louis to Shannon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

9,065 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

United Airlines

7.4

Good

9,065 reviews

United Airlines

7.4

Good

9,065 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

American Airlines

7.2

Good

11,041 reviews

United Airlines

7.4

Good

9,065 reviews

Reviews

1 / 20

2.0

Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

How long is the flight from St. Louis to Shannon, Clare?
Departing from St. Louis to Shannon, Clare will take you 10h 55m. The distance between St. Louis and Shannon, Clare is about 3824 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from St. Louis to Shannon, Clare round-trip?
Cheapflights users have booked flights from St. Louis to Shannon, Clare round-trip from $548. Another airline that can offer you cheap pricing is United Airlines. American Airlines is priced at 30% lower than the current average price of a flight leaving 3 months from now.
Can I find deals for flights from St. Louis to Shannon that include hotel bookings?
Yes. In addition to deals on St. Louis to Shannon flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Shannon?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Shannon.
Can I find deals for business class flights from St. Louis to Shannon?
Yes. Cheapflights offers flight deals from St. Louis to Shannon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Shannon, Clare?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Shannon, Clare (average of $483). Flying from St. Louis to Shannon, Clare in June is currently the most expensive (average of $752). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Ennis

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Top 2 airlines flying from St. Louis to Shannon

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$548	Average$821	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$641	Average$923	FlexibilityNo cancel fee	On-time69%

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$419+ Cheap flights from St. Louis (STL) to Shannon (SNN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Shannon with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Shannon

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Shannon

Cheapest flights from St. Louis to ShannonExplore the most affordable flight options available from St. Louis to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 1, 2025.

Explore the most affordable flight options available from St. Louis to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 1, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from St. Louis to Shannon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Shannon in December.

Best time to book a flight from St. Louis to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Shannon

What is the cheapest month to book a flight from St. Louis to Shannon, Clare?

Reviews of airlines servicing Shannon

See what other customers who have flown with United Airlines and American Airlines from St. Louis to Shannon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Shannon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from St. Louis to Shannon, Clare?

What are the cheapest airlines flying from St. Louis to Shannon, Clare round-trip?

Can I find deals for flights from St. Louis to Shannon that include hotel bookings?

How can I find direct flights from St. Louis to Shannon?

Can I find deals for business class flights from St. Louis to Shannon?

What is the cheapest month to book a flight from St. Louis to Shannon, Clare?

Traveling to a place near Shannon?

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Alternative routes for St. Louis to Shannon

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Top 2 airlines flying from St. Louis to Shannon

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Cheapest flights from St. Louis to Shannon
Explore the most affordable flight options available from St. Louis to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 1, 2025.