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 $584. Other airlines that can offer you cheap pricing are Delta, from $600, and Air Canada, from $852. United Airlines is priced at 36% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from St. Louis to Shannon, Clare one-way?

The cheapest airlines for a one-way flight from St. Louis to Shannon, Clare are American Airlines ($506), Air Canada ($586), and United Airlines ($638).

What is the cheapest day to fly from St. Louis to Shannon, Clare?

Travelers seeking maximum savings on their St. Louis to Shannon, Clare flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to Shannon, Clare?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 65% on the overall cost on flights from St. Louis to Shannon, Clare.

What is the cheapest month to fly from St. Louis to Shannon, Clare?

The best pricing can be found in the month of December. Prices to Shannon, Clare from St. Louis average $921. You can even find prices in December for less than $921, as users have found deals to Shannon, Clare from as low as $515. The month of July appears to be one of the more expensive times to travel to Shannon, Clare from St. Louis. Flying in the targeted month can save you up to 28%.

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 fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 12% versus a flight in the morning.

Most accurate provider : When it comes to deals on St. Louis-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Shannon, Clare flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

$506+ 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	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$584 (United Airlines)
One-way from	$506 (American Airlines)
Popular in	July
Cheapest in	December
Average price	$1,060

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

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

Search Deals

From Lambert-St Louis to Shannon

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One-way flight from Lambert-St Louis to Shannon

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($219 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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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 March 25, 2025.

Mon 4/144:44 pmSTL - SNN

1 stop11h 31mUnited Airlines

Wed 4/2312:30 pmSNN - STL

1 stop16h 45mUnited Airlines

Deal found 3/24

$584

Wed 7/911:51 amSTL - SNN

2 stops17h 19mDelta

Tue 7/221:05 pmSNN - STL

2 stops29h 19mDelta

Deal found 3/24

$685

Thu 5/81:30 pmSTL - SNN

2 stops20h 40mMultiple Airlines

Thu 5/1512:30 pmSNN - STL

1 stop17h 16mMultiple Airlines

Deal found 3/24

$837

Thu 5/81:30 pmSTL - SNN

2 stops25h 05mAir Canada

Thu 5/159:15 pmSNN - STL

2 stops28h 43mAir Canada

Deal found 3/24

$852

Tue 7/810:00 amSTL - SNN

1 stop13h 25mAmerican Airlines

Fri 7/181:45 pmSNN - STL

2 stops16h 04mAmerican Airlines

Deal found 3/24

$935

Mon 7/711:25 amSTL - SNN

1 stop16h 50mLufthansa

Fri 7/1812:30 pmSNN - STL

1 stop14h 35mLufthansa

Deal found 3/24

$1,092

Tue 7/84:52 pmSTL - SNN

2 stops17h 18mBritish Airways

Fri 7/181:45 pmSNN - STL

2 stops16h 04mBritish Airways

Deal found 3/24

$1,096

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 March 25, 2025.

Sun 4/64:44 pmSTL - SNN

1 stop11h 31mUnited Airlines

Tue 4/2212:30 pmSNN - STL

2 stops27h 28mUnited Airlines

Deal found 3/23

$584

Mon 5/267:05 amSTL - SNN

2 stops22h 05mDelta

Thu 6/51:05 pmSNN - STL

2 stops25h 55mDelta

Deal found 3/23

$600

Thu 5/81:30 pmSTL - SNN

2 stops20h 40mMultiple Airlines

Thu 5/1512:30 pmSNN - STL

1 stop17h 16mMultiple Airlines

Deal found 3/24

$837

Thu 5/81:30 pmSTL - SNN

2 stops25h 05mAir Canada

Thu 5/159:15 pmSNN - STL

2 stops28h 43mAir Canada

Deal found 3/24

$852

Thu 4/174:44 pmSTL - SNN

1 stop11h 31mLufthansa

Thu 4/2412:30 pmSNN - STL

1 stop16h 45mLufthansa

Deal found 3/24

$1,428

Thu 4/179:12 amSTL - SNN

1 stop14h 13mAmerican Airlines

Thu 4/247:40 amSNN - STL

2 stops20h 32mAmerican Airlines

Deal found 3/24

$2,584

Last-minute flights from St. Louis to Shannon
Discover last-minute flight deals from St. Louis to Shannon. Data last updated March 25, 2025 and is based on user searches.

Mon 4/143:40 pmSTL - SNN

2 stops12h 35mUnited Airlines

Wed 4/2312:30 pmSNN - STL

1 stop16h 45mUnited Airlines

Deal found 3/24

$584

Thu 4/174:44 pmSTL - SNN

1 stop11h 31mLufthansa

Thu 4/2412:30 pmSNN - STL

1 stop16h 45mLufthansa

Deal found 3/24

$1,428

Thu 4/173:30 pmSTL - SNN

2 stops23h 05mAir Canada

Thu 4/249:15 pmSNN - STL

3 stops26h 08mAir Canada

Deal found 3/24

$1,439

Thu 4/179:12 amSTL - SNN

1 stop14h 13mAmerican Airlines

Thu 4/247:40 amSNN - STL

2 stops20h 32mAmerican Airlines

Deal found 3/24

$2,584

One-way flights from St. Louis to Shannon
Search for one-way flight options from St. Louis to Shannon. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Tue 5/131:59 pmSTL - SNN

2 stops15h 21mAmerican Airlines

Deal found 3/24

$506

Tue 5/131:30 pmSTL - SNN

2 stops15h 50mAir Canada

Deal found 3/25

$586

Mon 6/98:10 amSTL - SNN

1 stop17h 20mUnited Airlines

Deal found 3/24

$638

Mon 6/97:00 amSTL - SNN

2 stops22h 10mDelta

Deal found 3/24

$644

Mon 6/97:05 pmSTL - SNN

2 stops34h 05mAir France

Deal found 3/23

$650

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 4/14

3:40 pm-10:15 am

2 stops12h 35m

Shannon

Wed 4/23

12:30 pm-11:15 pm

1 stop16h 45m

$584

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 7/9

11:51 am-11:10 am

2 stops17h 19m

Shannon

Tue 7/22

1:05 pm-12:24 pm

2 stops29h 19m

$685

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 5/8

1:30 pm-4:10 pm

2 stops20h 40m

Shannon

Thu 5/15

12:30 pm-11:46 pm

1 stop17h 16m

$837

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 5/8

1:30 pm-8:35 pm

2 stops25h 05m

Shannon

Thu 5/15

9:15 pm-7:58 pm

2 stops28h 43m

$852

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 7/8

6:00 am-5:25 am

2 stops17h 25m

Shannon

Fri 7/18

1:45 pm-9:15 pm

2 stops13h 30m

$935

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 7/7

11:25 am-10:15 am

1 stop16h 50m

Shannon

Fri 7/18

12:30 pm-9:05 pm

1 stop14h 35m

$1,092

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 7/8

4:52 pm-4:10 pm

2 stops17h 18m

Shannon

Fri 7/18

1:45 pm-11:49 pm

2 stops16h 04m

$1,096

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/13

1:59 pm-11:20 am

2 stops15h 21m

$506

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 5/13

1:30 pm-11:20 am

2 stops15h 50m

$586

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 6/9

8:10 am-7:30 am

1 stop17h 20m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 12 results

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 March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Shannon, Clare flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, February is the cheapest month in which you can book a flight from St. Louis to Shannon, Clare (average of $533). Flying from St. Louis to Shannon, Clare in June is currently the most expensive (average of $1,007). 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.

Rainfall in Shannon by month

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.

Temperature in Shannon by month

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).

Reviews of airlines servicing Shannon

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,890 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France

7.4

Good

1,423 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,605 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Canada

7.0

Good

8,952 reviews

Delta

8.0

Very good

7,890 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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 $584. Other airlines that can offer you cheap pricing are Delta, from $600, and Air Canada, from $852. United Airlines is priced at 36% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from St. Louis to Shannon, Clare one-way?
The cheapest airlines for a one-way flight from St. Louis to Shannon, Clare are American Airlines ($506), Air Canada ($586), and United Airlines ($638).
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, February is the cheapest month in which you can book a flight from St. Louis to Shannon, Clare (average of $533). Flying from St. Louis to Shannon, Clare in June is currently the most expensive (average of $1,007). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from St. Louis to Shannon

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$544	Average$841	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$752	Average$1,093	FlexibilityNo cancel fee	On-time69%

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$506+ Cheap flights from St. Louis (STL) to Shannon (SNN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. 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

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Cheap flight deals from St. Louis to Shannon

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Most trusted provider

Round-trip from

One-way 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 March 25, 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 March 25, 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 March.

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?

Rainfall in Shannon by month

Plan your trip to Shannon by taking into account the average rainfall totals by month.

Temperature in Shannon by month

Plan your trip to Shannon by taking into account the average temperature totals by month.

Reviews of airlines servicing Shannon

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.

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

What are the cheapest airlines to fly from St. Louis to Shannon, Clare one-way?

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 St. Louis?

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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 March 25, 2025.