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SFO - SNN

$276 Find cheap flights from San Francisco 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 San Francisco to Shannon departing on 9/25. 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 7/11
Thu 7/18

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 San Francisco 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 San Francisco to Shannon, as well as popular online travel agencies
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
9:00 pm - 10:50 amSFO-SNN
29h 50m1 stop
12:50 pm - 9:05 amSNN-SFO
28h 15m2 stops
$545Delta
Find Deal
Sun, Aug 4 - Tue, Aug 20
7:10 am - 10:50 amSFO-SNN
19h 40m1 stop
12:50 pm - 11:13 pmSNN-SFO
18h 23m1 stop
$556Delta
Find Deal
Mon, Aug 26 - Thu, Sep 5
1:15 pm - 10:30 amSFO-SNN
13h 15m1 stop
12:30 pm - 7:24 amSNN-SFO
26h 54m2 stops
$560United Airlines
Find Deal
Tue, Sep 24 - Tue, Oct 1
1:15 pm - 10:30 amSFO-SNN
13h 15m1 stop
12:30 pm - 11:55 pmSNN-SFO
19h 25m2 stops
$590United Airlines
Find Deal
Wed, Sep 25 - Fri, Oct 4
8:30 am - 11:30 amSFO-SNN
20h 00m2 stops
7:45 am - 11:30 pmSNN-SFO
23h 45m2 stops
Fri, Nov 1 - Fri, Nov 8
3:30 pm - 4:10 pmSFO-SNN
16h 40m1 stop
4:55 pm - 1:15 pmSNN-SFO
28h 20m1 stop
$742British Airways
Find Deal
Sun, Sep 22 - Mon, Sep 30
1:50 pm - 4:10 pmSFO-SNN
18h 20m2 stops
7:40 am - 5:40 pmSNN-SFO
18h 00m2 stops
$745American Airlines
Find Deal
Sun, Aug 4 - Tue, Aug 20
10:43 am - 11:20 amSFO-SNN
16h 37m2 stops
9:25 pm - 5:25 pmSNN-SFO
28h 00m1 stop
$746British Airways
Find Deal
Tue, Sep 24 - Thu, Oct 3
12:59 am - 6:05 amSFO-SNN
21h 06m2 stops
9:25 pm - 1:15 pmSNN-SFO
23h 50m1 stop
$758American Airlines
Find Deal
Sun, Aug 25 - Thu, Sep 5
9:04 am - 11:20 amSFO-SNN
18h 16m2 stops
7:40 am - 9:31 pmSNN-SFO
21h 51m2 stops
Sun, Sep 22 - Tue, Oct 1

Flights from San Francisco to Shannon - Travel Insights & Trends

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.

What’s the cheapest day of the week to fly from San Francisco to Shannon?

The average price of all flights from San Francisco to Shannon clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from San Francisco to Shannon, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Shannon, Monday is the cheapest day to fly and Friday is the most expensive.

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 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 March, where tickets cost $723 on average. On the other hand, the most expensive months are December and July, where the average cost of tickets is $1,276 and $1,263 respectively.

How far in advance should I book a flight from San Francisco to Shannon?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from San Francisco to Shannon, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from San Francisco to Shannon, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 48 days before departure.

Which airlines provide the cheapest flights from San Francisco 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 San Francisco to Shannon found by KAYAK users in the last 72 hours was for $545 on Delta, followed by United Airlines ($560). One-way flight deals have also been found from as low as $495 on United Airlines and from $595 on American Airlines.

Good to know

Low season

January

High season

July

Cheapest flight

$276
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly with an average 27% 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 3 days, the lowest price for a flight from San Francisco to Shannon was $276 for a one-way ticket and $545 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?

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

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Shannon are Delta and United Airlines. With an average price for the route of $976 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,038 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.

See more FAQs

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.
8.0
DeltaOverall score based on 10277 reviews
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
7.9Comfort
Airline reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

4.0 OkayBrooke, Jun 2024SFO - MSP
Read more about Delta reviews

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

Why does it have to be painful to fly long distances?

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

On time take off…US cabins look tired and need of refresh!

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

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.

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

The flight got us safely from point a to point b and on time. For a transatlantic flight that isnt nothing. Flight crew was kind and professional. The seats are super uncomfortable (worse than domestic budget airlines) and the cabin was DIRTY.

Long unexplained delay, uncomfortable back row, long waits for trash collection.

Great service on the plane and by ground staff. great prices. I was able to change seats on the plane. The allocated seats cannot be changed when checkin in online. They have to be done at the airport if you check in at the airport or on the plane by asking a stewardess / steward.

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

I was pleasantly surprised - it has been awhile since I traveled with them - other than being delayed leaving Malaga everything ran very smoothly- yes I would travel with aer Lingus again and yes I would recommended

I loved how they arrange boarding (starting with people seated in back and moving to the front). Flight crew was very polite and welcoming. Seating was ok, I felt like there was enough leg space however it is noticeable when the passenger in front of you sets their seat back.

Flight staff very friendly and helpful where possible. Late flight and travelling with young child, cabin lights remained on for the duration of the flight which was a little disappointing considering the time of the flight. Overall very happy to travel with Aer Lingus.

Nice to be on a flight that wasn't fully booked so there were only two of us in the three seat row.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

Delayed due to weather... fine. But then the board us. Rows 15 and back had to go down the stairs and back up the back stair entrance to the plane. No assistance offered. Then they inform us that we are delayed for paperwork for an hour. So why did we board? Then, about 45min later they inform us that it'll be another 60-90mins. Really? No wifi, no seat entertainment, no drink or snacks offered. And we were not allowed to deboard.

Economy class has no legroom so if you have the money worth to upgrade! Food was absolutely horrible! The crew was super nice!!!!!

The flight was provided by Aer Lingus and our seats were in a poor condition (15A & 15C). They looked like they needed repairing/replacing and were uncomfortable for such a long flight. Also the arm rests on Aer Lingus planes do not lift more than around 45 degrees, instead of the usual 90 degrees upright, meaning you cannot maximum the space between you & your travel companion so as to be more comfortable for such a long flight.

Flights were actually with Aer Lingus outward and American Airlines & Aer Lingus on the return journey. Outward flight with Aer Lingus was good but the return flight with them was not so good as our seats were in a poor condition (15A & 15C) and looked like they needed replacing! The American Airlines flight from Miami to JFK New York was good and the seats were very comfortable and spacious (32D & 32E)

Awful. Delay, lost vacation time and travel time now more than 24h

Awful. Flight delayed and we missed our long flight to Rome. It has been a nightmare and we have still not arrived. It was NOT a weather delay, just poor planning by AA

Sitting in the plane for an extended period of time was very hot and uncomfortable. Very late arrival happened to not affect me but many others probably missed their connection because it also took a long time to get to the terminal.

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

Very bed boarding, there was overbooked and make a lot of problems and noises

There was a problem in the luggage because there were not porters

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

Book cheap flights from San Francisco to Shannon

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from San Francisco to Shannon found on KAYAK in the last 72 hours.
9/25Wed
2 stops
37h 20mSFO-SNN
$276
9/23Mon
3 stops
29h 05mSFO-SNN
$312
9/25Wed
3 stops
25h 00mSFO-SNN
$342
9/23Mon
2 stops
30h 00mSFO-SNN
$359
9/27Fri
3 stops
35h 02mSFO-SNN
$373
9/22Sun
2 stops
27h 05mSFO-SNN
$374
9/22Sun
3 stops
31h 05mSFO-SNN
$377
9/21Sat
3 stops
34h 43mSFO-SNN
$381
9/30Mon
3 stopsUnited Airlines
20h 15mSFO-SNN
$495
9/27Fri
1 stopAmerican Airlines
23h 34mSFO-SNN
$595

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Last minute flights from San Francisco 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 San Francisco to Shannon that are departing in the next 10 days.
6/12Wed
multi-stopUnited Airlines
12h 52mSFO-SNN
6/26Wed
multi-stopUnited Airlines
15h 18mSNN-SFO
$913
6/12Wed
multi-stopKLM
20h 45mSFO-SNN
6/26Wed
multi-stopKLM
28h 10mSNN-SFO
$917
6/12Wed
multi-stopUnited Airlines
16h 45mSFO-SNN
6/24Mon
multi-stopUnited Airlines
17h 30mSNN-SFO
$963
6/12Wed
multi-stopKLM
20h 45mSFO-SNN
6/24Mon
multi-stopKLM
18h 23mSNN-SFO
$987
6/14Fri
multi-stopLufthansa
27h 55mSFO-SNN
6/26Wed
multi-stopLufthansa
16h 54mSNN-SFO
$1,291
6/14Fri
multi-stopLufthansa
19h 30mSFO-SNN
6/26Wed
multi-stopLufthansa
16h 54mSNN-SFO
$1,552
6/13Thu
multi-stopAir Canada
19h 55mSFO-SNN
6/23Sun
multi-stopAir Canada
35h 32mSNN-SFO
$2,058
6/13Thu
multi-stopAir Canada
19h 55mSFO-SNN
6/22Sat
multi-stopAir Canada
37h 51mSNN-SFO
$2,064
6/13Thu
multi-stopBritish Airways
19h 00mSFO-SNN
6/25Tue
multi-stopBritish Airways
17h 45mSNN-SFO
$2,191
6/14Fri
multi-stopBritish Airways
18h 35mSFO-SNN
6/25Tue
multi-stopBritish Airways
18h 47mSNN-SFO
$2,302

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San Francisco - Shannon Flights

Departure:

San Francisco (SFO)United States

Destination:

Shannon (SNN)Ireland

Return flight deals:

Shannon - San Francisco

Cabin classes:

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