$636+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SNN
Nov 29 — Dec 61
Round-trip
1 adult, Economy
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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
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Best
Last-minute
One-way
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 October 30, 2026.
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 October 30, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:29 pm -
2 stops17h 16m
Thu 12/107:50 am -
2 stops17h 40m
Deal found 10/27![British Airways logo]()
$982
This KAYAK deal was found by Cheapflights users on 10/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:21 pm -
1 stop29h 29m
Thu 12/102:00 pm -
1 stop25h 29m
Deal found 10/27![Aer Lingus logo]()
$988
This Ovago deal was found by Cheapflights users on 10/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:21 pm -
2 stops16h 09m
Thu 12/102:00 pm -
1 stop25h 29m
Deal found 10/27![Multiple Airlines logo]()
$997
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:50 am -
3 stops18h 40m
Thu 12/107:50 am -
3 stops21h 09m
Deal found 10/27![Air Canada logo]()
$1,020
This KAYAK deal was found by Cheapflights users on 10/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:56 am -
1 stop13h 54m
Thu 12/32:00 pm -
1 stop33h 50m
Deal found 10/27![Aer Lingus logo]()
$1,030
This Ovago deal was found by Cheapflights users on 10/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1112:55 pm -
2 stops16h 35m
Fri 12/182:00 pm -
2 stops14h 02m
Deal found 10/26![British Airways logo]()
$1,039
This Ovago deal was found by Cheapflights users on 10/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2612:44 pm -
2 stops16h 46m
Thu 12/32:00 pm -
1 stop25h 29m
Deal found 10/27![Multiple Airlines logo]()
$1,042
This Ovago deal was found by Cheapflights users on 10/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/139:59 am -
1 stop13h 51m
Sun 12/202:40 pm -
2 stops23h 49m
Deal found 10/29![Multiple Airlines logo]()
$1,044
This American Airlines deal was found by Cheapflights users on 10/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/119:59 am -
1 stop13h 51m
Fri 12/182:00 pm -
2 stops15h 59m
Deal found 10/26![American Airlines logo]()
$1,061
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/268:30 am -
3 stops21h 00m
Thu 12/37:50 am -
3 stops21h 09m
Deal found 10/27![Air Canada logo]()
$1,070
Best flights from St. Louis to ShannonDiscover 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 October 30, 2026.
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 October 30, 2026.
This United Airlines deal was found by Cheapflights users on 10/25. 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 4/289:23 am -
2 stops18h 52m
Wed 5/1212:30 pm -
2 stops15h 36m
Deal found 10/25![United Airlines logo]()
$728
This United Airlines deal was found by Cheapflights users on 10/29. 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 4/174:30 pm -
2 stops35h 45m
Tue 4/2012:30 pm -
2 stops16h 24m
Deal found 10/29![United Airlines logo]()
$739
This United Airlines deal was found by Cheapflights users on 10/28. 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 4/174:30 pm -
2 stops35h 45m
Wed 4/2112:30 pm -
2 stops16h 24m
Deal found 10/28![United Airlines logo]()
$739
Last-minute flights from St. Louis to ShannonDiscover last-minute flight deals from St. Louis to Shannon. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Shannon. Data last updated October 30, 2026 and is based on user searches.
This Ovago deal was found by Cheapflights users on 10/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:20 pm -
1 stop29h 30m
Mon 11/97:50 am -
2 stops17h 32m
Deal found 10/28![Multiple Airlines logo]()
$1,101
This Ovago deal was found by Cheapflights users on 10/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:20 pm -
1 stop29h 30m
Mon 11/92:00 pm -
1 stop25h 16m
Deal found 10/28![Aer Lingus logo]()
$1,492
This Air Canada deal was found by Cheapflights users on 10/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:08 pm -
3 stops16h 22m
Mon 11/98:05 pm -
3 stops31h 35m
Deal found 10/28![Air Canada logo]()
$1,996
This KAYAK deal was found by Cheapflights users on 10/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:56 am -
1 stop13h 54m
Thu 12/32:00 pm -
1 stop33h 50m
Deal found 10/27![Aer Lingus logo]()
$1,030
This Ovago deal was found by Cheapflights users on 10/27. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2612:44 pm -
2 stops16h 46m
Thu 12/32:00 pm -
1 stop25h 29m
Deal found 10/27![Multiple Airlines logo]()
$1,042
This Air Canada deal was found by Cheapflights users on 10/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/268:30 am -
3 stops21h 00m
Thu 12/37:50 am -
3 stops21h 09m
Deal found 10/27![Air Canada logo]()
$1,070
One-way flights from St. Louis to ShannonSearch for one-way flight options from St. Louis to Shannon. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from St. Louis to Shannon. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1212:47 pm -
2 stops21h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![British Airways logo]()
$636
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $728 (United Airlines) |
One-way from | $636 (KAYAK) |
Popular in | June |
Cheapest in | December |
Average price | $1,044 |
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 7,457,451 searches. Data last updated October 30, 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
Cheapest round-trip
Quickest round-trip
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Thu 11/12
12:47 pm-4:45 pm
2 stops21h 58m
Shannon
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$636
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Wed 4/28
9:23 am-10:15 am
2 stops18h 52m
Shannon
Wed 5/12
12:30 pm-10:06 pm
2 stops15h 36m
$728
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
Sat 4/17
4:30 pm-10:15 am
2 stops35h 45m
Shannon
Wed 4/21
12:30 pm-10:54 pm
2 stops16h 24m
$739
Sorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
STL-SNN
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 October 30, 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.
Entertainment
7.1
Food
6.7
Comfort
7.3
Crew
8.1
Boarding
7.7
Overall
7.3
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Entertainment
7.1
Food
6.7
Comfort
7.3
Crew
8.1
Boarding
7.7
Overall
7.3
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
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.
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St. Louis and Shannon flights
Browse other St. Louis and Shannon flight options. Last updated on October 30, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Shannon
Explore flights to Shannon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 30, 2026.
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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$596 | Average$846 | FlexibilityNo cancel fee | On-time69% |