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STL - SNN

€312 Find Cheap Flights from St. Louis to Shannon – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
€807
Typical prices: €651-€905
United Airlines
Sun 14/10Sun 21/10
STL - SNN • 1 stop
Cheapest one-way flight
€312
Typical prices: €382-€918
Multiple Airlines
Sun 11/11
STL - SNN • 3 stops
Direct flights
Not available
There are currently no direct flights between St. Louis and Shannon. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
December
Cheapest • 45% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Chicago O'Hare Intl (ORD)
Cheapest • Avg €778 (return)
Newark (EWR)
Shortest trip • 12h 06m (one-way)
Insights
Insights
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We hope you enjoy your trip to Shannon!
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Booking Insights
Flight Deals

Cheap Flights from St. Louis to Shannon (STL-SNN)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from St. Louis to Shannon

Wed, 14 Oct - Wed, 21 Oct
United Airlines Logo
12:20 - 10:15STL  Lambert-St Louis-SNN Shannon
15h 55m1 stop Newark
United Airlines Logo
12:30 - 21:36SNN  Shannon-STL Lambert-St Louis
15h 06m1 stop Newark
€807United Airlines
Wed, 14 Oct - Wed, 21 Oct
United Airlines Logo
09:30 - 10:15STL  Lambert-St Louis-SNN Shannon
18h 45m1 stop Newark
United Airlines Logo
12:30 - 22:30SNN  Shannon-STL Lambert-St Louis
16h 00m2 stops Newark Houston George Bush Intcntl
€811United Airlines
Mon, 9 Nov - Mon, 16 Nov
British Airways Logo
13:58 - 16:45STL  Lambert-St Louis-SNN Shannon
20h 47m2 stops Charlotte Douglas London Heathrow
British Airways Logo
20:05 - 21:51SNN  Shannon-STL Lambert-St Louis
31h 46m2 stops London Heathrow Charlotte Douglas
€833British Airways
Sun, 13 Dec - Mon, 21 Dec
British Airways Logo
17:38 - 19:25STL  Lambert-St Louis-SNN Shannon
19h 47m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
20:05 - 18:06SNN  Shannon-STL Lambert-St Louis
28h 01m2 stops London Heathrow Dallas/Fort Worth
€843British Airways
Tue, 10 Nov - Wed, 18 Nov
Aer Lingus Logo
09:50 - 05:50STL  Lambert-St Louis-SNN Shannon
14h 00m1 stop Boston Logan Intl
Aer Lingus Logo
14:00 - 17:51SNN  Shannon-STL Lambert-St Louis
33h 51m1 stop Boston Logan Intl
€845Aer Lingus
Tue, 8 Dec - Thu, 24 Dec
British Airways Logo
14:00 - 16:45STL  Lambert-St Louis-SNN Shannon
20h 45m2 stops Charlotte Douglas London Heathrow
British Airways Logo
07:50 - 22:42SNN  Shannon-STL Lambert-St Louis
20h 52m2 stops London Heathrow Philadelphia
€851British Airways
Sat, 12 Dec - Mon, 21 Dec
British Airways Logo
13:15 - 11:30STL  Lambert-St Louis-SNN Shannon
40h 15m2 stops Boston Logan Intl London Heathrow
British Airways Logo
17:30 - 19:30SNN  Shannon-STL Lambert-St Louis
32h 00m2 stops London Heathrow Charlotte Douglas
€853British Airways
Mon, 9 Nov - Mon, 16 Nov
Multiple Airlines Logo
10:53 - 11:30STL  Lambert-St Louis-SNN Shannon
18h 37m3 stops Chicago O'Hare Intl Toronto Pearson Intl London Heathrow
Multiple Airlines Logo
20:05 - 15:26SNN  Shannon-STL Lambert-St Louis
49h 21m2 stops London Heathrow Toronto Pearson Intl
€855Multiple Airlines
Sat, 12 Dec - Tue, 22 Dec
British Airways Logo
20:24 - 11:30STL  Lambert-St Louis-SNN Shannon
33h 06m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
07:50 - 22:32SNN  Shannon-STL Lambert-St Louis
20h 42m2 stops London Heathrow Chicago O'Hare Intl
€857British Airways
Mon, 9 Nov - Mon, 16 Nov
Air Canada Logo
13:08 - 11:30STL  Lambert-St Louis-SNN Shannon
16h 22m3 stops Chicago O'Hare Intl Toronto Pearson Intl London Heathrow
Air Canada Logo
20:05 - 21:40SNN  Shannon-STL Lambert-St Louis
31h 35m3 stops London Heathrow Toronto Pearson Intl Chicago O'Hare Intl
€864Air Canada
Booking Insights

Price, demand, and travel trends for St. Louis to Shannon flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from St. Louis to Shannon with more confidence.

How much is a return flight from St. Louis to Shannon?

Return flights from St. Louis to Shannon start at €807. Prices are typical for this route right now, with typical return fares ranging from €651 to €905. The lowest price found in the past 5 days was €807 on United Airlines.

What's the cheapest day of the week to fly from St. Louis to Shannon?

Tuesday is the cheapest day of the week to fly from St. Louis to Shannon and is 16% cheaper than the average day. Monday is the most expensive day with flight prices 16% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for St. Louis to Shannon flights

Low season

January

Cheapest flight

€312
Most popular time to fly and prices are also 16% lower on average.
Flights from St. Louis to Shannon

When to book flights from St. Louis to Shannon

Are your dates flexible? Find out the best times to travel from St. Louis to Shannon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your St. Louis to Shannon flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • How long is a flight from St. Louis to Shannon?

    A direct flight from St. Louis to Shannon takes 0h 00m, covering 9,903 km.

  • Do I need a passport to fly from St. Louis to Shannon?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a St. Louis to Shannon flight?

    Return flights from St. Louis to Shannon range from €651 to €905, with an average of €775 over the past 12 months. Anything below €651 counts as a good deal.

  • Have flight prices from St. Louis to Shannon changed much recently?

    Yes. Based on fares seen in the past 5 days, return flight prices on this route showed a wide range, from about €807 to €1,918. That means the highest observed fare was about 2x higher than the lowest one.

  • How are flight prices from St. Louis to Shannon looking right now?

    One-way fares from St. Louis to Shannon are currently lower than usual. Average one-way flight prices are about €374, which is 42% below the typical average for this route.

  • Which car hire options are available at Shannon Airport (SNN)?

    Shannon Airport (SNN) hosts 5 major car hire companies, with daily rates starting from around €3 for economy cars. Top options include:
    • Budget
    • Sixt
    • Europcar
    • Thrifty
    • Easirent

  • Which airports can I use when flying from St. Louis to Shannon?

    Flights from St. Louis to Shannon usually depart from Lambert-St Louis (STL) and arrive at Shannon (SNN).

  • Which airports do connecting flights from St. Louis to Shannon pass through?

    One-stop flights from St. Louis to Shannon most commonly connect through:

    • Chicago O'Hare Intl (ORD) – 87% of one-stop connections
    • Newark (EWR) – 11% of one-stop connections
    • Boston Logan Intl (BOS) – 2% of one-stop connections

    Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Shannon?

    Yes. Being flexible with your travel dates can save you up to 28% on the St. Louis to Shannon route. Tuesday is the cheapest departure day at €657 return on average, while Monday is the most expensive at €905, a difference of €248. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different stopover airport from St. Louis to Shannon?

    Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time of 11h 26m, compared to 12h 06m via Newark (EWR) and 19h 34m via Boston Logan Intl (BOS).

  • What is the time difference between St. Louis and Shannon?

    Shannon is 6 hours ahead of St. Louis (Irish Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking St. Louis to Shannon flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure instead of Monday. On this route, Tuesday flights average €657 – about €248 less than Monday (27% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Shannon trip for December. Fares historically average €426 return in that month – typically €764 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Shannon Airport.
    - Park Inn by Radisson Shannon Airport
    - Treacys Oakwood Hotel
    - Carrygerry Country House

More options for your flight from St. Louis to Shannon

Complete your trip to Shannon with a hotel stay or car hire

Car hire in Shannon
Hotels in Shannon
Holidays in Shannon