Find flights
Deals
When to book
FAQs & Tips
Airlines

STL - SNN

Find cheap flights from St. Louis to Shannon from $822

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Shannon departing on 8/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 6/6
Thu 6/13

Search hundreds of travel sites at once for deals on flights to Shannon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Shannon, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Shannon, as well as popular online travel agencies
In the last 7 days travelers have searched 43,707,506 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Shannon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:32 pm - 10:30 amSTL-SNN
10h 58m1 stop
9:30 am - 9:52 pmSNN-STL
18h 22m1 stop
$822United Airlines
Find Deal
Tue, Aug 20 - Tue, Aug 27
2:05 pm - 10:50 amSTL-SNN
14h 45m2 stops
12:50 pm - 8:52 amSNN-STL
26h 02m2 stops
$827KLM
Find Deal
Tue, Aug 20 - Tue, Aug 27
5:32 pm - 10:30 amSTL-SNN
10h 58m1 stop
9:30 am - 2:53 pmSNN-STL
11h 23m1 stop
$872United Airlines
Find Deal
Fri, Aug 23 - Tue, Sep 3
2:05 pm - 10:50 amSTL-SNN
14h 45m2 stops
12:50 pm - 8:52 amSNN-STL
26h 02m2 stops
$877KLM
Find Deal
Fri, Aug 23 - Tue, Sep 3
2:38 pm - 4:10 pmSTL-SNN
19h 32m2 stops
9:25 pm - 5:17 pmSNN-STL
25h 52m2 stops
$919American Airlines
Find Deal
Thu, Sep 12 - Mon, Sep 23
4:20 pm - 4:10 pmSTL-SNN
17h 50m2 stops
9:25 pm - 3:28 pmSNN-STL
24h 03m2 stops
$1,039American Airlines
Find Deal
Mon, May 20 - Thu, May 30
12:00 pm - 8:35 pmSTL-SNN
26h 35m2 stops
7:40 am - 9:52 pmSNN-STL
20h 12m3 stops
$1,153Air Canada
Find Deal
Tue, Aug 20 - Tue, Aug 27
4:05 pm - 4:10 pmSTL-SNN
18h 05m2 stops
7:40 am - 9:37 pmSNN-STL
19h 57m3 stops
$1,504Air Canada
Find Deal
Mon, Jul 15 - Sat, Jul 27
3:00 pm - 11:20 amSTL-SNN
14h 20m2 stops
5:30 pm - 4:17 pmSNN-STL
28h 47m2 stops
$1,663British Airways
Find Deal
Sun, May 19 - Sat, May 25
6:18 pm - 4:10 pmSTL-SNN
15h 52m2 stops
7:40 am - 7:47 pmSNN-STL
18h 07m2 stops
$2,580British Airways
Find Deal
Tue, Aug 20 - Tue, Aug 27

Good to know

Cheapest flight

$822
Flight 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 round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Shannon

  • What is the cheapest flight from St. Louis to Shannon?

    In the last 3 days, the lowest price for a flight from St. Louis to Shannon was $822 for a round-trip ticket.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Shannon.

  • Which aircraft models fly most regularly from St. Louis to Shannon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Shannon?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Shannon, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Shannon, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Shannon are United Airlines and American Airlines. With an average price for the route of $1,122 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $869 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from St. Louis to Shannon?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Shannon.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Shannon?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Shannon?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Shannon with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SNN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Shannon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Shannon from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from St. Louis to Shannon

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Shannon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Shannon? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 11073 reviews
8.1Crew
7.7Boarding
6.7Food
7.2Comfort
7.1Entertainment
Airline reviews

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

4.0 OkayAnonymous, May 2024EWR - CDG
Read more about United Airlines reviews

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

All flights were on time and boarding was issue free

Even though we left CMI late, we mostly made up the time.

Delayed almost 4 hours for a 45 minute flight with no explanation.

Again, multiple delays and I eventually just canceled and drove!

Great crew. Very comfortable business seats with nice bedding. Good food. We were delayed to let late passengers on the flight, but otherwise great experience.

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

The CX617 from HK to BKK was delayed more than 1.5 hours.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

I was in business class. There was an excellent headset. But half an hour before arrival they collected them! The rest of the trip I had to use a cheap earphone. There must be a better way to protect the headphones.

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

Bordón could be bettet if the company say before boarding the order of the different groups.

Checked in is easy and it was a smooth flight from LAX to Munich

There is no recline on flight from DFW to FRA. Middle eastern airways provide better recline option for the same class. FRA to Bangalore has better recline option. I bid 100$ for premium economy, my request was declined. But staff handled it without issues.

The Lufthansa part was wonderful. The short connection flight was not.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

Last minute flights from St. Louis to Shannon

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Shannon that are departing in the next 10 days.
5/12Sun
multi-stopAmerican Airlines
20h 10mSTL-SNN
5/21Tue
multi-stopAmerican Airlines
21h 42mSNN-STL
$1,210
5/12Sun
multi-stopUnited Airlines
10h 55mSTL-SNN
5/21Tue
multi-stopUnited Airlines
16h 15mSNN-STL
$1,376
5/12Sun
multi-stopLufthansa
16h 10mSTL-SNN
5/21Tue
multi-stopLufthansa
15h 24mSNN-STL
$1,402
5/12Sun
multi-stopAir Canada
24h 20mSTL-SNN
5/21Tue
multi-stopAir Canada
20h 09mSNN-STL
$1,449

Search by stops

Search by airline

Search by price

St. Louis - Shannon Flights

Departure:

St. Louis (undefined)United States

Destination:

Shannon (SNN)Ireland

Cabin classes:

Browse destinations: