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STL - SNN

$515 Find cheap flights from St. Louis to Shannon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Shannon departing on 6/18. 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 6/13
Thu 6/20

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 42,566,405 times on KAYAK, and here is why:

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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.
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2:38 pm - 11:20 amSTL-SNN
14h 42m2 stops
7:45 am - 11:22 pmSNN-STL
20h 37m2 stops
$759American Airlines
Find Deal
Fri, Oct 25 - Sat, Nov 2
12:00 pm - 3:45 pmSTL-SNN
21h 45m2 stops
7:45 am - 9:21 pmSNN-STL
18h 36m3 stops
$803Air Canada
Find Deal
Fri, Oct 25 - Sat, Nov 2
11:08 am - 6:05 amSTL-SNN
12h 57m2 stops
2:45 pm - 2:07 pmSNN-STL
28h 22m1 stop
$814American Airlines
Find Deal
Fri, Oct 25 - Sat, Nov 2
9:30 am - 7:30 amSTL-SNN
16h 00m1 stop
9:30 am - 3:49 pmSNN-STL
12h 19m1 stop
$822United Airlines
Find Deal
Wed, Sep 4 - Wed, Sep 11
7:10 am - 10:50 amSTL-SNN
21h 40m2 stops
12:50 pm - 8:51 amSNN-STL
26h 01m2 stops
$827Delta
Find Deal
Wed, Sep 4 - Wed, Sep 11
11:10 am - 7:30 amSTL-SNN
14h 20m1 stop
9:30 am - 3:49 pmSNN-STL
12h 19m1 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
11:10 am - 7:30 amSTL-SNN
14h 20m1 stop
9:30 am - 2:53 pmSNN-STL
11h 23m1 stop
$922United Airlines
Find Deal
Fri, Aug 23 - Mon, Sep 2
10:00 am - 10:50 amSTL-SNN
18h 50m2 stops
12:50 pm - 8:32 pmSNN-STL
13h 42m2 stops
$927Delta
Find Deal
Fri, Aug 23 - Mon, Sep 2
12:15 pm - 10:30 amSTL-SNN
16h 15m1 stop
12:30 pm - 10:56 pmSNN-STL
16h 26m1 stop
$1,132Lufthansa
Find Deal
Thu, Sep 12 - Sun, Sep 22

Flights from St. Louis to Shannon - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Shannon to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from St. Louis to Shannon?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from St. Louis to Shannon found by KAYAK users in the last 72 hours was for $759 on American Airlines, followed by Air Canada ($803). One-way flight deals have also been found from as low as $857 on United Airlines and from $862 on American Airlines.

Good to know

Cheapest flight

$515
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 $515 for a one-way ticket and $759 for a round-trip.

  • 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, oneworld, and SkyTeam are the airline alliances operating flights between St. Louis and Shannon, with Star Alliance 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 $1,120 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 10980 reviews
7.7Boarding
6.7Food
7.2Comfort
7.1Entertainment
8.1Crew
Airline reviews

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

8.0 ExcellentAnonymous, May 2024IAH - AKL
Read more about United Airlines reviews

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

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.

Tray table was filthy when I sat down. I needed to have someone come clean it because there was food and stains on it WiFi didn’t work after paying for in flight WiFi Food was terrible and was not filling at all Chicken was rubbery Flight attendant had an attitude, interrupted me and wasn’t able to answer basic questions about the food selection such as “does the chicken have red sauce in it”. If your flight attendants are not going to know what is in the meals so we can make an educated decision based on dietary restrictions, they shouldn’t be on the plane. My 1.5 year old niece was sleeping and dropped her binkie. I went on the ground under the chairs looking for it. It was at that time that she came up to me as I’m CLEARLY on all 4s with a flashlight and said “I need to get by”. I said one moment please I’m getting something from under the seat (while my head was literally under the seat). Her reply was “no you need to move now” and proceeded to almost push me out of the way. I looked up and all I saw was her toes under my eyes. When I looked in front of me, her private parts were inches away from my face. I then made a comment “you couldn’t waited 2 seconds?” and her response was, “no I need to use the bathroom”. I understand that and would never want to be the reason someone couldn’t get to the bathroom but I was under the seat. She could’ve gone around the other way instead of harassing me, basically placing her private parts on my head and borderline pushing me out of the way. You don’t pay (especially this much) for this deplorable experience. This was by far the worst experience I have ever had on American. I will be absolutely thinking twice and thrice about flying American Airlines again. I would rather pay more to fly delta because at least I know their WiFi will work and their flight attendants won’t have a terrible attitude for no reason, nor will they act the way this woman did. Unacceptable.

Tray table was filthy when I sat down. I needed to have someone come clean it because there was food and stains on it WiFi didn’t work after paying for in-flight WiFi. Food was terrible and was not filling at all Chicken was rubbery Flight attendant had an attitude, interrupted me and wasn’t able to answer basic questions about the food selection such as “does the chicken have red sauce in it”. If your flight attendants are not going to know what is in the meals so we can make an educated decision based on dietary restrictions, they shouldn’t be on the plane. My 1.5 year old niece was sleeping and dropped her binkie. I went on the ground under the chairs looking for it. It was at that time that she came up to me as I’m CLEARLY on all 4s with a flashlight and said “I need to get by”. I said one moment please I’m getting something from under the seat (while my head was literally under the seat). Her reply was “no you need to move now” and proceeded to almost push me out of the way. I looked up and all I saw was her toes under my eyes. When I looked in front of me, her private parts were inches away from my face. I then made a comment “you couldn’t waited 2 seconds?” and her response was, “no I need to use the bathroom”. I understand that and would never want to be the reason someone couldn’t get to the bathroom but I was under the seat. She could’ve gone around the other way instead of harassing me, basically placing her private parts on my head and borderline pushing me out of the way. You don’t pay that much for this deplorable experience. This was by far the worst experience I have ever had on American. I will be absolutely thinking twice and thrice about flying American Airlines again. I would rather pay more to fly delta because at least I know their WiFi will work and their flight attendants won’t have a shitty attitude for no reason, nor will they act the way this woman did. Unacceptable.

Liked - nothing. Disliked - delayed 35+ min sitting on the plane. Caused me to miss my connection in Charlotte. American Airlines is the worst US Air Carrier company with atrocious customer service.

Worst situation ever! I booked my tickets for this trip on Alaska Airlines. I guess AA is a partner and we flew nonstop from Eugene to PHX on an AA jet. I had to pay for luggage from PHX to EUG. And this was an Alaska Airlines reservation paid for with Alaska airlines credit card! Got to the PHX airport and was not able to check bags because of some weird issue with the AA software. My reservation had to be the-entered by the agent. I will never pick another American Airlines flight on the Alaska Airlines website. While on vacation, I tried to upgrade our seats for the trip home. The request just buffered and never went through. I tried four times and was charged four times on my credit card. The card was charged but the seats were never changed. What a wreck!

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

I like the boarding process, it was fast. The seat doesn’t have a TV for a long flight and food wasn’t served, just snacks.

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

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!

Everything could be better. The plain was in Orlando for 3 hours prior to boarding. After boarding all the passengers they found out that plane has a mechanical problem. After an hour the problem was solved, the pilot comes on and states, (We have to go back to the gate and take on more fuel!) Are you kidding me???? Who they have for pilots, Boy scouts?? I barely made my connecting flight to Vienna, but my suitcase did not. I'm still waiting for it, in Gyor, Hungary. Am I having fun yet?? Other passenger were in the same binned. I travelled all over the world both for business and pleasure with all types of airlines. By far of all the carriers I travelled with, Discover is the worst. I'm contemplating to bight the bullet and go back to the US with a different carrier. For International flights, the seats are made for little people. The person in front of me had his seat reclined the whole way, I felt like he was sitting in my lap. For closing, I would not let my dog travel with Discover, yet alone recommend it to an other person. Does it sound like I'm frustrated, Think about having to travel back to the US with them. I'm sure I'll not hear back from you, because nobody wants to hear about bad news, but with all the hype Discover puts out there about their services, nothing could be further from the truth. Joseph A. Nagy

Only problem we experienced was not anything to do with Lufthansa. When changing planes in Frankfurt we spent over an hour on passport control line. Lufthansa did a marvelous job on everything from keeping me informed via texts, to terrific cabin crew.

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

Book cheap flights from St. Louis to Shannon

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Shannon found on KAYAK in the last 72 hours.
6/18Tue
3 stops
43h 05mSTL-SNN
$515
8/2Fri
3 stops
46h 33mSTL-SNN
$544
6/18Tue
2 stops
42h 51mSTL-SNN
$615
8/2Fri
2 stops
43h 53mSTL-SNN
$627
6/18Tue
1 stopUnited Airlines
13h 52mSTL-SNN
$857
8/2Fri
1 stopAmerican Airlines
13h 05mSTL-SNN
$862

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St. Louis - Shannon Flights

Departure:

St. Louis (undefined)United States

Destination:

Shannon (SNN)Ireland

Cabin classes:

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