$421+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SNN
Mar 7 — Mar 141
1 adult, Economy
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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
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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 February 5, 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 February 5, 2026.
This United Airlines deal was found by Cheapflights users on 2/4. 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 8/163:15 pm
STL
- SNN
1 stop10h 15m
United Airlines
Wed 8/269:30 am
SNN
- STL
1 stop11h 51m
United Airlines
Deal found 2/4![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:00 am
STL
- SNN
2 stops23h 10m
Delta
Fri 8/281:05 pm
SNN
- STL
2 stops13h 26m
Delta
Deal found 2/4![Delta logo]()
$493
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:30 pm
STL
- SNN
2 stops35h 40m
Delta
Fri 8/281:05 pm
SNN
- STL
2 stops13h 26m
Delta
Deal found 2/4![Delta logo]()
$498
This United Airlines deal was found by Cheapflights users on 2/4. 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
Mon 8/249:30 am
SNN
- STL
1 stop10h 48m
United Airlines
Deal found 2/4![United Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 2/4. 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
Sat 8/229:30 am
SNN
- STL
1 stop10h 48m
United Airlines
Deal found 2/4![United Airlines logo]()
$540
This United Airlines deal was found by Cheapflights users on 2/4. 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 4/277:45 am
STL
- SNN
2 stops20h 30m
United Airlines
Sat 5/912:30 pm
SNN
- STL
2 stops27h 00m
United Airlines
Deal found 2/4![United Airlines logo]()
$543
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:20 am
STL
- SNN
2 stops21h 50m
Delta
Wed 8/261:05 pm
SNN
- STL
2 stops26h 25m
Delta
Deal found 2/4![Delta logo]()
$568
This KAYAK deal was found by Cheapflights users on 2/4. 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.
Mon 4/275:24 pm
STL
- SNN
1 stop10h 51m
Lufthansa
Sat 5/912:00 pm
SNN
- STL
1 stop31h 25m
Lufthansa
Deal found 2/4![Lufthansa logo]()
$587
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Fri 8/218:15 pm
STL
- SNN
1 stop29h 15m
United Airlines
Mon 8/249:30 am
SNN
- STL
1 stop10h 48m
United Airlines
Deal found 2/4![United Airlines logo]()
$595
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Fri 8/218:15 pm
STL
- SNN
1 stop29h 15m
United Airlines
Sun 8/239:30 am
SNN
- STL
1 stop10h 48m
United Airlines
Deal found 2/4![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Fri 5/15:59 pm
STL
- SNN
2 stops34h 16m
United Airlines
Mon 5/1112:30 pm
SNN
- STL
2 stops27h 00m
United Airlines
Deal found 2/2![United Airlines logo]()
$606
This United Airlines deal was found by Cheapflights users on 2/2. 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 9/98:15 pm
STL
- SNN
1 stop29h 15m
United Airlines
Tue 9/229:30 am
SNN
- STL
1 stop10h 48m
United Airlines
Deal found 2/2![United Airlines logo]()
$607
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 February 5, 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 February 5, 2026.
This United Airlines deal was found by Cheapflights users on 2/4. 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 4/277:45 am
STL
- SNN
2 stops20h 30m
United Airlines
Sat 5/912:30 pm
SNN
- STL
2 stops27h 00m
United Airlines
Deal found 2/4![United Airlines logo]()
$543
This KAYAK deal was found by Cheapflights users on 2/4. 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.
Mon 4/275:24 pm
STL
- SNN
1 stop10h 51m
Lufthansa
Sat 5/912:00 pm
SNN
- STL
1 stop31h 25m
Lufthansa
Deal found 2/4![Lufthansa logo]()
$587
This Ovago deal was found by Cheapflights users on 2/2. 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 3/191:34 pm
STL
- SNN
2 stops16h 56m
British Airways
Thu 3/267:50 am
SNN
- STL
2 stops20h 00m
British Airways
Deal found 2/2![British Airways logo]()
$684
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Wed 2/254:05 pm
STL
- SNN
2 stops37h 25m
Air Canada
Sun 3/17:50 am
SNN
- STL
2 stops37h 39m
Air Canada
Deal found 2/3![Air Canada logo]()
$689
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Wed 3/2511:25 am
STL
- SNN
3 stops19h 05m
Multiple Airlines
Sat 4/47:30 am
SNN
- STL
2 stops37h 54m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$768
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Fri 5/15:59 pm
STL
- SNN
2 stops34h 16m
United Airlines
Mon 5/1112:30 pm
SNN
- STL
2 stops27h 00m
United Airlines
Deal found 2/2![United Airlines logo]()
$606
This KAYAK deal was found by Cheapflights users on 2/4. 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.
Wed 3/256:57 pm
STL
- SNN
2 stops16h 48m
British Airways
Sat 4/41:45 pm
SNN
- STL
2 stops24h 53m
British Airways
Deal found 2/4![British Airways logo]()
$715
Last-minute flights from St. Louis to ShannonDiscover last-minute flight deals from St. Louis to Shannon. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Shannon. Data last updated February 5, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Wed 2/254:05 pm
STL
- SNN
2 stops37h 25m
Air Canada
Sun 3/17:50 am
SNN
- STL
2 stops37h 39m
Air Canada
Deal found 2/3![Air Canada logo]()
$689
This Ovago deal was found by Cheapflights users on 2/2. 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 3/191:34 pm
STL
- SNN
2 stops16h 56m
British Airways
Thu 3/267:50 am
SNN
- STL
2 stops20h 00m
British Airways
Deal found 2/2![British Airways logo]()
$684
This KAYAK deal was found by Cheapflights users on 2/4. 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.
Wed 3/256:57 pm
STL
- SNN
2 stops16h 48m
British Airways
Sat 4/41:45 pm
SNN
- STL
2 stops24h 53m
British Airways
Deal found 2/4![British Airways logo]()
$715
This Air Canada deal was found by Cheapflights users on 2/3. 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.
Wed 3/2511:25 am
STL
- SNN
3 stops19h 05m
Multiple Airlines
Sat 4/47:30 am
SNN
- STL
2 stops37h 54m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$768
This American Airlines deal was found by Cheapflights users on 2/4. 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.
Wed 3/2511:59 am
STL
- SNN
1 stop13h 21m
American Airlines
Sat 4/41:45 pm
SNN
- STL
1 stop26h 24m
American Airlines
Deal found 2/4![American Airlines logo]()
$772
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 February 5, 2026.
Search for one-way flight options from St. Louis to Shannon. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Ovago deal was found by Cheapflights users on 2/3. 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 2/1711:59 am
STL
- SNN
1 stop12h 21m
Aer Lingus
Deal found 2/3![Aer Lingus logo]()
$421
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:05 pm
STL
- SNN
2 stops21h 20m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$499
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 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $606 (United Airlines) |
One-way from | $421 (Ovago) |
Popular in | June |
Cheapest in | December |
Average price | $907 |
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 5, 2026.
Use the filters below to find and compare flights from St. Louis to Shannon that are best for you.
Fly from
St. Louis
Fly to
Shannon
Route
Depart
Return
Price
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Mon 4/27
7:45 am-10:15 am
2 stops20h 30m
Shannon
Sat 5/9
12:30 pm-9:30 am
2 stops27h 00m
$543
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Mon 4/27
5:24 pm-10:15 am
1 stop10h 51m
Shannon
Sat 5/9
12:00 pm-1:25 pm
1 stop31h 25m
$587
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Fri 5/1
5:59 pm-10:15 am
2 stops34h 16m
Shannon
Mon 5/11
12:30 pm-9:30 am
2 stops27h 00m
$606
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Thu 3/19
1:34 pm-11:30 am
2 stops16h 56m
Shannon
Thu 3/26
7:50 am-10:50 pm
2 stops20h 00m
$684
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Wed 2/25
4:05 pm-11:30 am
2 stops37h 25m
Shannon
Sun 3/1
7:50 am-3:29 pm
2 stops37h 39m
$689
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Wed 3/25
6:57 pm-4:45 pm
2 stops16h 48m
Shannon
Sat 4/4
1:45 pm-8:38 am
2 stops24h 53m
$715
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Wed 3/25
11:25 am-11:30 am
3 stops19h 05m
Shannon
Sat 4/4
7:30 am-3:24 pm
2 stops37h 54m
$768
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Tue 2/17
11:59 am-6:20 am
1 stop12h 21m
$421
St. LouisShannon
STL - SNN
STLSNN
Lambert-St Louis
Tue 2/17
4:05 pm-7:25 pm
2 stops21h 20m
$499
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.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 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.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Shannon
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 5, 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.
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.6
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.6
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Boarding
7.7
Crew
8.1
Entertainment
7.1
Food
6.6
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
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.
Traveling to a place near Shannon?
Book flights to Shannon if you plan to visit one of these locationsEnnis
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St. Louis and Shannon flights
Browse other St. Louis and Shannon flight options. Last updated on February 5, 2026.
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Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on February 5, 2026.
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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 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$483 | Average$719 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$595 | Average$837 | FlexibilityNo cancel fee | On-time69% |