HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Shannon

$378+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SNN
Jul 13 — Jul 201
Mon 7/13
Mon 7/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Shannon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 13, 2026.

This United Airlines deal was found by Cheapflights users on 6/11. 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 9/912:59 pm
STL
-
SNN
1 stop12h 31m
United Airlines
Sun 9/139:30 am
SNN
-
STL
1 stop12h 08m
United Airlines
Deal found 6/11$758
This United Airlines deal was found by Cheapflights users on 6/8. 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 9/99:43 am
STL
-
SNN
1 stop15h 47m
United Airlines
Tue 9/229:30 am
SNN
-
STL
1 stop12h 08m
United Airlines
Deal found 6/8$770
This United Airlines deal was found by Cheapflights users on 6/12. 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.
Mon 8/36:14 am
STL
-
SNN
2 stops19h 16m
United Airlines
Wed 8/199:30 am
SNN
-
STL
1 stop12h 08m
United Airlines
Deal found 6/12$771
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Mon 9/211:36 pm
STL
-
SNN
2 stops14h 39m
United Airlines
Thu 10/112:30 pm
SNN
-
STL
2 stops14h 51m
United Airlines
Deal found 6/13$775
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Sun 8/1612:59 pm
STL
-
SNN
1 stop12h 31m
United Airlines
Fri 8/289:30 am
SNN
-
STL
1 stop12h 08m
United Airlines
Deal found 6/8$779
This KLM deal was found by Cheapflights users on 6/8. 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 8/1610:44 am
STL
-
SNN
2 stops18h 26m
KLM
Fri 8/281:05 pm
SNN
-
STL
2 stops16h 53m
KLM
Deal found 6/8$784
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 10/17:30 am
STL
-
SNN
1 stop20h 45m
United Airlines
Thu 10/812:30 pm
SNN
-
STL
1 stop14h 39m
United Airlines
Deal found 6/11$820
This United Airlines deal was found by Cheapflights users on 6/13. 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 7/281:13 pm
STL
-
SNN
1 stop12h 17m
United Airlines
Tue 8/412:30 pm
SNN
-
STL
1 stop17h 06m
United Airlines
Deal found 6/13$828

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 June 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$758
(United Airlines)

One-way from

$378
(Kiwi.com)
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
One-way flight 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 June 13, 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

Cheapest round-trip
Quickest round-trip

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

9:43 am-7:30 am

1 stop15h 47m

Shannon

Tue 9/22

9:30 am-3:38 pm

1 stop12h 08m

$770

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/23

8:00 am-7:30 am

1 stop17h 30m

Shannon

Wed 9/9

12:30 pm-11:38 pm

1 stop17h 08m

$779

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sun 8/16

10:53 am-7:30 am

1 stop14h 37m

Shannon

Fri 8/28

12:30 pm-11:40 pm

2 stops17h 10m

$784

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 10/1

5:10 am-10:15 am

2 stops23h 05m

Shannon

Thu 10/8

12:30 pm-9:09 pm

1 stop14h 39m

$825

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Tue 7/28

11:25 am-10:15 am

2 stops16h 50m

Shannon

Tue 8/4

12:30 pm-11:36 pm

1 stop17h 06m

$833

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Wed 9/9

8:40 am-7:30 am

2 stops16h 50m

Shannon

Sun 9/13

9:30 am-3:38 pm

1 stop12h 08m

$834

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Mon 8/31

12:52 pm-11:10 am

2 stops16h 18m

Shannon

Mon 9/7

1:05 pm-3:57 pm

2 stops32h 52m

$886
Cheapest one-way

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Sat 7/11

4:57 pm-4:35 pm

3 stops41h 38m

$378
Quickest one-way

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 9/17

8:00 am-10:15 am

2 stops20h 15m

$379

St. LouisShannon

STL - SNN

STLSNN

Lambert-St Louis

Thu 10/1

7:30 am-10:15 am

1 stop20h 45m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 11 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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 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 June 13, 2026.
See what other customers who have flown with United 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
9,815 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,815 reviews
United Airlines
7.4
Good
9,815 reviews

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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 15h 47m. The distance between St. Louis and Shannon, Clare is about 3824 mi.

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

    Cheapflights users have booked flights from St. Louis to Shannon, Clare round-trip from $546.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Shannon

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Dublin flights
Kansas City to Dublin flights
St. Louis to Cork flights
Springfield to Dublin flights
Springfield to Shannon flights

Top airline flying from St. Louis to Shannon

Discover the top airline 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 June 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$546Average$880FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.