STL - SNN

€419 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
€536
Typical prices: €639-€888
United Airlines
Sat 13/10Sat 20/10
STL - SNN • 1 stop
Cheapest one-way flight
€419
Typical prices: €376-€902
Multiple Airlines
Mon 12/3
STL - SNN • 2 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 €764 (return)
Newark (EWR)
Shortest trip • 12h 06m (one-way)
Insights
Insights
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We hope you enjoy your trip to Shannon!
Flight Deals
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

Tue, 13 Oct - Tue, 20 Oct
United Airlines Logo
09:30 - 10:15STL  Lambert-St Louis-SNN Shannon
18h 45m1 stop Newark
United Airlines Logo
12:30 - 21:09SNN  Shannon-STL Lambert-St Louis
14h 39m1 stop Newark
€536United Airlines
Tue, 13 Oct - Tue, 20 Oct
United Airlines Logo
13:29 - 10:15STL  Lambert-St Louis-SNN Shannon
14h 46m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
12:30 - 12:13SNN  Shannon-STL Lambert-St Louis
29h 43m3 stops Newark Houston George Bush Intcntl Chicago O'Hare Intl
€540United Airlines
Thu, 1 Oct - Wed, 7 Oct
United Airlines Logo
05:10 - 10:15STL  Lambert-St Louis-SNN Shannon
47h 05m2 stops Denver Intl Newark
United Airlines Logo
12:30 - 21:09SNN  Shannon-STL Lambert-St Louis
14h 39m1 stop Newark
€595United Airlines
Thu, 1 Oct - Wed, 7 Oct
United Airlines Logo
05:10 - 10:15STL  Lambert-St Louis-SNN Shannon
47h 05m2 stops Denver Intl Newark
United Airlines Logo
12:30 - 15:43SNN  Shannon-STL Lambert-St Louis
33h 13m2 stops Newark Chicago O'Hare Intl
€633United Airlines
Mon, 26 Oct - Mon, 2 Nov
British Airways Logo
17:27 - 19:25STL  Lambert-St Louis-SNN Shannon
20h 58m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
20:05 - 21:57SNN  Shannon-STL Lambert-St Louis
31h 52m2 stops London Heathrow Charlotte Douglas
€663British Airways
Thu, 1 Oct - Wed, 7 Oct
United Airlines Logo
05:10 - 10:15STL  Lambert-St Louis-SNN Shannon
47h 05m2 stops Denver Intl Newark
United Airlines Logo
12:30 - 12:13SNN  Shannon-STL Lambert-St Louis
29h 43m3 stops Newark Houston George Bush Intcntl Chicago O'Hare Intl
€691United Airlines
Sat, 3 Oct - Sat, 31 Oct
British Airways Logo
17:18 - 11:20STL  Lambert-St Louis-SNN Shannon
36h 02m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
17:15 - 23:15SNN  Shannon-STL Lambert-St Louis
35h 00m2 stops London Heathrow Chicago O'Hare Intl
€717British Airways
Mon, 26 Oct - Mon, 2 Nov
Air Canada Logo
13:08 - 11:30STL  Lambert-St Louis-SNN Shannon
17h 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
€725Air Canada
Mon, 26 Oct - Mon, 2 Nov
American Airlines Logo
07:16 - 05:50STL  Lambert-St Louis-SNN Shannon
17h 34m2 stops Charlotte Douglas Boston Logan Intl
American Airlines Logo
14:00 - 09:16SNN  Shannon-STL Lambert-St Louis
25h 16m1 stop Boston Logan Intl
€728American Airlines
Fri, 12 Mar - Sat, 20 Mar
American Airlines Logo
11:31 - 05:50STL  Lambert-St Louis-SNN Shannon
12h 19m2 stops Chicago O'Hare Intl Boston Logan Intl
American Airlines Logo
14:00 - 10:59SNN  Shannon-STL Lambert-St Louis
25h 59m1 stop Boston Logan Intl
€775American Airlines
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 €536. Prices are below average for this route right now, with typical return fares ranging from €639 to €888. The lowest price found in the past 5 days was €536 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

€419
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.

  • 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 €646 return on average, while Monday is the most expensive at €889, a difference of €243. 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 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 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 €513, which is 18% below the typical average for this route.

  • 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.

  • 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

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

    Return flights from St. Louis to Shannon range from €639 to €888, with an average of €761 over the past 12 months. Anything below €639 counts as a good deal.

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 €646 – about €243 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 €418 return in that month – typically €750 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

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