$608+ 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 12/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SNN
Dec 10 — Dec 171
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
Cheapest
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 November 10, 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 November 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 11/7. 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.
Sun 12/134:27 pm -
2 stops18h 18m
Mon 12/218:05 pm -
2 stops28h 02m
Deal found 11/7![British Airways logo]()
$997
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 12/69:59 am -
2 stops19h 31m
Sun 12/132:00 pm -
1 stop33h 50m
Deal found 11/6![Multiple Airlines logo]()
$1,039
This Ovago deal was found by Cheapflights users on 11/7. 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
Mon 12/212:40 pm -
2 stops23h 49m
Deal found 11/7![Multiple Airlines logo]()
$1,082
This KAYAK deal was found by Cheapflights users on 11/7. 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.
Sun 12/139:59 am -
1 stop13h 51m
Mon 12/212:00 pm -
1 stop25h 28m
Deal found 11/7![Aer Lingus logo]()
$1,216
This Air Canada deal was found by Cheapflights users on 11/6. 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.
Sun 12/610:50 am -
3 stops18h 40m
Sun 12/137:50 am -
3 stops21h 09m
Deal found 11/6![Air Canada logo]()
$1,356
This Air Canada deal was found by Cheapflights users on 11/5. 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.
Sun 12/131:18 pm -
3 stops16h 12m
Mon 12/217:50 am -
3 stops21h 48m
Deal found 11/5![Air Canada logo]()
$1,901
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 November 10, 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 November 10, 2026.
This United Airlines deal was found by Cheapflights users on 11/7. 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 4/187:30 am -
1 stop20h 45m
Wed 4/2112:30 pm -
1 stop16h 55m
Deal found 11/7![United Airlines logo]()
$724
This FlightHub deal was found by Cheapflights users on 11/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/135:38 pm -
2 stops17h 07m
Mon 12/215:30 pm -
2 stops32h 00m
Deal found 11/5![British Airways logo]()
$1,000
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 12/69:59 am -
2 stops19h 31m
Sun 12/132:00 pm -
1 stop33h 50m
Deal found 11/6![Multiple Airlines logo]()
$1,039
This Air Canada deal was found by Cheapflights users on 11/5. 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.
Sun 12/131:18 pm -
3 stops16h 12m
Mon 12/217:50 am -
3 stops21h 48m
Deal found 11/5![Air Canada logo]()
$1,901
This Ovago deal was found by Cheapflights users on 11/7. 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
Mon 12/212:40 pm -
2 stops23h 49m
Deal found 11/7![Multiple Airlines logo]()
$1,082
Last-minute flights from St. Louis to ShannonDiscover last-minute flight deals from St. Louis to Shannon. Data last updated November 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Shannon. Data last updated November 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 11/6. 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.
Sun 12/69:59 am -
2 stops19h 31m
Sun 12/132:00 pm -
1 stop33h 50m
Deal found 11/6![Multiple Airlines logo]()
$1,039
This Air Canada deal was found by Cheapflights users on 11/6. 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.
Sun 12/610:50 am -
3 stops18h 40m
Sun 12/137:50 am -
3 stops21h 09m
Deal found 11/6![Air Canada logo]()
$1,356
This Cheapflightsfares deal was found by Cheapflights users on 11/7. 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.
Sun 12/134:27 pm -
2 stops18h 18m
Mon 12/218:05 pm -
2 stops28h 02m
Deal found 11/7![British Airways logo]()
$997
This Ovago deal was found by Cheapflights users on 11/7. 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
Mon 12/212:40 pm -
2 stops23h 49m
Deal found 11/7![Multiple Airlines logo]()
$1,082
This KAYAK deal was found by Cheapflights users on 11/7. 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.
Sun 12/139:59 am -
1 stop13h 51m
Mon 12/212:00 pm -
1 stop25h 28m
Deal found 11/7![Aer Lingus logo]()
$1,216
This Air Canada deal was found by Cheapflights users on 11/5. 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.
Sun 12/131:18 pm -
3 stops16h 12m
Mon 12/217:50 am -
3 stops21h 48m
Deal found 11/5![Air Canada logo]()
$1,901
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 November 10, 2026.
Search for one-way flight options from St. Louis to Shannon. Find affordable one-way fares based on user searches. Data last updated November 10, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 11/6. 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.
Fri 12/252:40 pm -
2 stops14h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![British Airways logo]()
$608
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:20 pm -
3 stops59h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$659
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 November 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $724 (United Airlines) |
One-way from | $608 (Cheapflightsfares) |
Popular in | June |
Cheapest in | December |
Average price | $994 |
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 November 10, 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
Fri 12/25
2:40 pm-11:30 am
2 stops14h 50m
Shannon
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$608
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Fri 12/25
6:20 pm-11:20 am
3 stops59h 00m
Shannon
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$659
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Sun 4/18
7:30 am-10:15 am
1 stop20h 45m
Shannon
Wed 4/21
12:30 pm-11:25 pm
1 stop16h 55m
$724
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Sun 12/13
5:38 pm-4:45 pm
2 stops17h 07m
Shannon
Mon 12/21
5:30 pm-7:30 pm
2 stops32h 00m
$1,000
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Sun 12/6
9:59 am-11:30 am
2 stops19h 31m
Shannon
Sun 12/13
2:00 pm-5:50 pm
1 stop33h 50m
$1,039
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Sun 12/13
9:59 am-5:50 am
1 stop13h 51m
Shannon
Mon 12/21
2:40 pm-8:29 am
2 stops23h 49m
$1,082
St. LouisShannon
STL Lambert-St Louis - SNN Shannon
STLSNN
Lambert-St Louis
Sun 12/13
1:18 pm-11:30 am
3 stops16h 12m
Shannon
Mon 12/21
7:50 am-11:38 pm
3 stops21h 48m
$1,901
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 November.
| 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 November 10, 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.
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.7
Overall
7.3
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.7
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 November 10, 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 November 10, 2026.
Popular flight searches
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Other flights to Shannon
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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 November 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$600 | Average$880 | FlexibilityNo cancel fee | On-time69% |