SFO - SNN

$446 Find Cheap Flights from San Francisco to Shannon - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Shannon departing on 8/9. 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
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$813
Typical prices: $825-$987
United Airlines
Tue 9/1Tue 9/15
SFO - SNN • 1 stop
Cheapest one-way
$446
Typical prices: $406-$483
Aer Lingus
Sun 8/9
SFO - SNN • 2 stops
Top airlines
Cheapest • from $813 (round-trip)
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Shannon. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $1,078 (round-trip)
Shortest trip • 13h 38m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Shannon!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Shannon (SFO-SNN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Shannon

Tue, Sep 1 - Tue, Sep 15
United Airlines Logo
10:05 am - 7:30 am
SFO
-
SNN
13h 25m
1 stop
United Airlines Logo
9:30 am - 7:22 pm
SNN
-
SFO
17h 52m
1 stop
$813United Airlines
Tue, Sep 1 - Wed, Sep 16
United Airlines Logo
5:00 am - 7:30 am
SFO
-
SNN
18h 30m
1 stop
United Airlines Logo
9:30 am - 6:24 pm
SNN
-
SFO
16h 54m
1 stop
$813United Airlines
Sat, Sep 5 - Fri, Sep 18
Delta Logo
10:35 pm - 11:10 am
SFO
-
SNN
28h 35m
1 stop
Delta Logo
1:05 pm - 10:27 pm
SNN
-
SFO
17h 22m
1 stop
$821Delta
Sat, Sep 5 - Fri, Sep 18
Multiple Airlines Logo
5:36 am - 11:10 am
SFO
-
SNN
21h 34m
2 stops
Multiple Airlines Logo
1:05 pm - 11:59 pm
SNN
-
SFO
18h 54m
2 stops
$867Multiple Airlines
Thu, Aug 27 - Thu, Sep 3
Lufthansa Logo
8:15 am - 7:30 am
SFO
-
SNN
15h 15m
1 stop
Lufthansa Logo
12:30 pm - 9:15 pm
SNN
-
SFO
16h 45m
1 stop
$872Lufthansa
Thu, Aug 27 - Thu, Sep 3
Air France Logo
11:49 am - 11:10 am
SFO
-
SNN
15h 21m
1 stop
Air France Logo
1:05 pm - 10:33 pm
SNN
-
SFO
17h 28m
1 stop
$879Air France
Wed, Nov 11 - Wed, Nov 18
British Airways Logo
5:25 pm - 7:25 pm
SFO
-
SNN
18h 00m
1 stop
British Airways Logo
8:05 pm - 2:55 pm
SNN
-
SFO
26h 50m
1 stop
$928British Airways
Wed, Nov 11 - Wed, Nov 18
British Airways Logo
8:45 am - 11:30 am
SFO
-
SNN
18h 45m
2 stops
British Airways Logo
7:50 am - 2:55 pm
SNN
-
SFO
15h 05m
1 stop
$940British Airways
Fri, Nov 20 - Sat, Nov 28
American Airlines Logo
5:50 am - 6:20 am
SFO
-
SNN
16h 30m
2 stops
American Airlines Logo
7:50 am - 2:55 pm
SNN
-
SFO
15h 05m
1 stop
$1,331American Airlines
Fri, Nov 20 - Sat, Nov 28
American Airlines Logo
9:45 pm - 5:55 am
SFO
-
SNN
24h 10m
1 stop
American Airlines Logo
2:00 pm - 12:47 am
SNN
-
SFO
18h 47m
1 stop
$1,372American Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Shannon flights

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

How much is a round-trip flight from San Francisco to Shannon, Clare?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Shannon, Clare departing in September.

Flight prices are below average for this route right now.

Flights to Shannon, Clare from San Francisco usually cost between $975 and $1,292 in September.
The lowest price found in the past 5 days was $813 on United Airlines (Sep 1-Sep 15).

What is the cheapest month to fly from San Francisco to Shannon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Shannon, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Shannon is December, where tickets cost $627 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,160 and $1,107 respectively.

Good to know

Low season

December

Cheapest flight

$446
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 22% increase in price.
Flight from San Francisco to Shannon

When to book flights from San Francisco to Shannon

Are your dates flexible? Find out the best times to travel from San Francisco 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 San Francisco to Shannon

  • What is the cheapest flight from San Francisco to Shannon?

    In the last 5 days, the lowest price for a flight from San Francisco to Shannon was $446 for a one-way ticket and $813 for a round-trip.

  • Do I need a passport to fly between San Francisco and Shannon?

    Yes

  • Which airports will I be using when flying from San Francisco to Shannon?

    San Francisco and Shannon are both served by 1 main airport. You will leave San Francisco from San Francisco and will be arriving at Shannon.

  • Which aircraft models fly most regularly from San Francisco to Shannon?

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

  • Which airline alliances offer flights from San Francisco to Shannon?

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

  • Which is the best airline for flights from San Francisco to Shannon, Air France or United Airlines?

    The two airlines most popular with KAYAK users for flights from San Francisco to Shannon are Air France and United Airlines. With an average price for the route of $931 and an overall rating of 7.5, Air France is the most popular choice. United Airlines is also a great choice for the route, with an average price of $992 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from San Francisco 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 San Francisco to Shannon.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from San Francisco 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 San Francisco 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 San Francisco with another airline. Booking your flights between San Francisco 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 San Francisco 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 San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from San Francisco to Shannon

 
See real verified KAYAK customer reviews for airlines flying from San Francisco 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 San Francisco 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.
7.5
Air FranceOverall score based on 1632 reviews
7.0Entertainment
8.2Crew
7.4Comfort
7.0Food
7.5Boarding
Airline reviews

Seats! The eternal problem in economy. They are like stones!!

6.0 GoodJuan G, Jun 2026
IAD - CDG
Read more Air France reviews

Seats! The eternal problem in economy. They are like stones!!

Everything is good except the seats are tightened no rooms for the legs,

The plane's pilots, including the captain himself, thanked me for the flight. I know it's just marketing, but it was really nice to see these people. It's a great idea. Airplane food is never "good," but the entire crew and flight organization were top-notch. I really liked Delta, and I think I've traveled all over the world, and that was something new for me. Maybe even the old planes, the B767, but next time I have a choice, Delta will be my first choice. Thank you, a satisfied passenger :)

It was a great experience. The only thing I would have changed was that the bathrooms were never cleaned and they got very dirty.

It was an OK flight with below mediocre service by their flight attendants

Wasted a lot of time trying to find the CDG lounge - it was not next to the connecting flight gate like the Air France staff said.

The only reason the overall rating wasn't "excellent" was due to problems in claiming luggage. The bags are delivered to the main area (Cinta 35) for domestic passengers, but to a DIFFERENT ROOM for international arrivees. After waiting 30 minutes, someone (who didn't appear to be from Air France or the airport) told us to go to another area. There we found our bags, which appeared to have been awaiting us for a while. We had to go through a bag check before leaving the airport. If we had been alerted to this possibility, or better yet, been to go directly to Cinta 34, we could have eliminated quite a bit of waiting.

I did not get my baggage at my final destination..poor coordination with connecting flights with partner airlines (Saudi airways). Also the food was very mediocre.

Business class in the second leg - CDG-EVN was a disaster.

No birding was given for next trip on same carrier, food was very moderate.

The pilot was late so we didn’t take off til almost 2 hours late.

It was a short, comfortable flight. It did leave an hour late due to the pilot having to be replaced (family emergency) but that didn’t inconvenience myself & my friend. The situation was explained, eventually.

Excellent communication from the staff. We actually arrived early. Very friendly and professional staff.

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

It was perfect! United Airlines staff was extremely caring, super friendly and professional

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Flight attendant made the flight very enjoyable. He was courteous and gave great care to the passengers

Not good. Flight crew, was not friendly and just shoved stuff at us. Not the way I like to travel.

Aside from the little delay, overall was flight good. Made it safely. Thanks!

Over the course of 7 months of travel, I can count on my hand the number of times the flight has departed on time. Majority of the instances have been related to non-weather reasons. Would not recommend flying this Airline

The food was okay and the space in business class was smaller than we had to Singapore.

The plane was spartan, the seats not that comfortable. It was like flying a super low budget airline. They charged for coffee!!! I have never, ever experienced that before.

I had no problems but the changing of planes that I was supposed to be on was confusing. Maybe it would be helpful to let people know your flight changed. Not everyone understands airports or how flying works.

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

I was not clear if food was offered or not.

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

They set someone on our assigned seats and we ended up finding seats for ourselves to ensure the family sits together.

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Food choices limited & not enticing Seats quite uncomfortable & difficult to control

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Lufthansa charged me $280 to take skiiis when in the US the boot bag and skiis are one check-in bag. This was not advertised and a real shock at the airport. They only took the boot bag as a check-in item. The seats have been squeezed together like any economy airline and legroom is not as good as it used to be. Otherwise, the flight was fine and staff was helpful for making my connection.

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Wish the food and overall service was better. They treat Business class passengers same as economy

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

Everything you need to know for your flight from San Francisco to Shannon

Information on your arrival and departure airports