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Shannon

$539+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SNN
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
1 adult, Economy
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Cheap 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 February 26, 2026.

This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:49 pm
STL
-
SNN
1 stop30h 41m
United Airlines
Sun 8/239:30 am
SNN
-
STL
1 stop10h 48m
United Airlines
Deal found 2/23$539
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:24 pm
STL
-
SNN
1 stop10h 51m
United Airlines
Wed 4/2912:30 pm
SNN
-
STL
2 stops16h 26m
United Airlines
Deal found 2/21$542
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:54 am
STL
-
SNN
2 stops19h 21m
United Airlines
Tue 5/1212:30 pm
SNN
-
STL
2 stops27h 00m
United Airlines
Deal found 2/24$562
This Gurufare deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:30 pm
STL
-
SNN
1 stop12h 40m
Lufthansa
Tue 9/2212:30 pm
SNN
-
STL
1 stop16h 57m
Lufthansa
Deal found 2/23$587
This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:49 pm
STL
-
SNN
1 stop30h 41m
United Airlines
Tue 9/2212:30 pm
SNN
-
STL
2 stops27h 12m
United Airlines
Deal found 2/23$611
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:54 am
STL
-
SNN
2 stops19h 21m
United Airlines
Mon 5/1112:30 pm
SNN
-
STL
2 stops27h 00m
United Airlines
Deal found 2/24$612
This KLM deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:00 pm
STL
-
SNN
1 stop12h 10m
Multiple Airlines
Sun 9/201:05 pm
SNN
-
STL
1 stop33h 50m
Multiple Airlines
Deal found 2/22$619
This KLM deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:05 pm
STL
-
SNN
2 stops34h 05m
KLM
Sun 9/201:05 pm
SNN
-
STL
1 stop33h 50m
KLM
Deal found 2/22$623

Find flight deals from St. Louis to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Shannon (SNN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$539
(United Airlines)
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

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Shannon 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, Cheapflights users made 2,558,603 searches. Data last updated February 26, 2026.
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

Tue 4/21

10:00 am-10:15 am

2 stops18h 15m

Shannon

Wed 4/29

12:30 pm-10:28 pm

2 stops15h 58m

$542

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/29

8:54 am-10:15 am

2 stops19h 21m

Shannon

Tue 5/12

12:30 pm-9:30 am

2 stops27h 00m

$562

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

11:37 am-10:15 am

1 stop16h 38m

Shannon

Thu 4/30

12:30 pm-11:57 pm

1 stop17h 27m

$587

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/29

8:54 am-10:15 am

2 stops19h 21m

Shannon

Mon 5/11

12:30 pm-9:30 am

2 stops27h 00m

$612

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

1:10 pm-10:15 am

2 stops15h 05m

Shannon

Sun 5/3

12:30 pm-12:10 am

2 stops17h 40m

$635

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Fri 4/17

8:21 am-10:15 am

2 stops19h 54m

Shannon

Sat 4/25

12:30 pm-9:47 pm

2 stops15h 17m

$642

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

1:10 pm-10:15 am

2 stops15h 05m

Shannon

Thu 4/30

12:30 pm-10:45 pm

2 stops16h 15m

$658

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 4/21

4:05 pm-4:10 pm

2 stops18h 05m

Shannon

Sat 5/2

12:00 pm-12:06 pm

2 stops30h 06m

$680

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 4/8

5:21 pm-4:10 pm

2 stops16h 49m

Shannon

Wed 4/15

7:30 am-4:41 pm

2 stops15h 11m

$709

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 4/30

5:59 pm-10:15 am

2 stops34h 16m

Shannon

Tue 5/12

12:30 pm-9:30 am

2 stops27h 00m

$719

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust 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.

Reviews of airlines servicing Shannon

Get insights into the airlines that provide service to Shannon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Shannon. Reviews last updated February 26, 2026.
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
9,348 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,348 reviews
United Airlines
7.4
Good
9,348 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,352 reviews
United Airlines
7.4
Good
9,348 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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?

    Departing from St. Louis to Shannon, Clare will take you 16h 38m. 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 $483. Another airline that can offer you cheap pricing is United Airlines.

  • 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.

See more FAQs

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis

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Alternative routes for St. Louis to Shannon

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from St. Louis to Shannon

Discover the top 2 airlines that operate flights from St. Louis to Shannon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$483Average$813FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$546Average$836FlexibilityNo cancel feeOn-time69%

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