SNN - SFO

€349 Find Cheap Flights from Shannon to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Shannon to San Francisco departing on 29/9. 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

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Shannon to San Francisco, 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 Shannon to San Francisco, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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

Free to useThere are no hidden charges or fees.

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

Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Shannon to San Francisco 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 return flight deals from Shannon to San Francisco

Thu, 4 Sep - Tue, 9 Sep
United Airlines Logo
12:30 - 20:32SNN-SFO
16h 02m1 stop
United Airlines Logo
10:35 - 10:15SFO-SNN
15h 40m1 stop
€512United Airlines
Find Deal
Thu, 4 Sep - Tue, 9 Sep
Lufthansa Logo
12:30 - 20:32SNN-SFO
16h 02m1 stop
Lufthansa Logo
07:05 - 10:15SFO-SNN
19h 10m1 stop
€522Lufthansa
Find Deal
Thu, 4 Sep - Tue, 9 Sep
Delta Logo
13:05 - 20:53SNN-SFO
15h 48m1 stop
Delta Logo
22:50 - 11:10SFO-SNN
28h 20m1 stop
€532Delta
Find Deal
Tue, 11 Nov - Thu, 20 Nov
Aer Lingus Logo
20:05 - 15:35SNN-SFO
27h 30m2 stops
Aer Lingus Logo
20:40 - 19:25SFO-SNN
14h 45m1 stop
€623Aer Lingus
Find Deal
Tue, 11 Nov - Thu, 20 Nov
Aer Lingus Logo
20:05 - 15:35SNN-SFO
27h 30m2 stops
Aer Lingus Logo
17:30 - 16:45SFO-SNN
15h 15m1 stop
€625Aer Lingus
Find Deal
Tue, 11 Nov - Thu, 20 Nov
Aer Lingus Logo
20:05 - 15:35SNN-SFO
27h 30m2 stops
Aer Lingus Logo
10:11 - 19:25SFO-SNN
25h 14m2 stops
€627Aer Lingus
Find Deal
Thu, 4 Sep - Tue, 9 Sep
American Airlines Logo
07:40 - 19:15SNN-SFO
19h 35m2 stops
American Airlines Logo
15:59 - 16:10SFO-SNN
16h 11m2 stops
€629American Airlines
Find Deal
Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
14:00 - 23:59SNN-SFO
17h 59m1 stop
American Airlines Logo
17:30 - 16:45SFO-SNN
15h 15m1 stop
€630American Airlines
Find Deal
Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
14:00 - 23:37SNN-SFO
17h 37m1 stop
American Airlines Logo
07:30 - 05:55SFO-SNN
14h 25m1 stop
€650American Airlines
Find Deal
Thu, 4 Sep - Tue, 9 Sep
 Logo
07:10 - 10:39SNN-SFO
35h 29m2 stops
 Logo
16:05 - 11:50SFO-SNN
35h 45m1 stop
€778
Find Deal
Booking Insights

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

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

Which airlines provide the cheapest flights from Shannon to San Francisco?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest return tickets from Shannon to San Francisco were found on United Airlines (€512) and Lufthansa (€522).

Good to know

Low seasonMarch
Cheapest flight€349
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly and prices are also 3% lower on average.
Flight from Shannon to San Francisco

When to book flights from Shannon to San Francisco

Are your dates flexible? Find out the best times to travel from Shannon to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 Shannon to San Francisco

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

    In the last 3 days, the lowest price for a flight from Shannon to San Francisco was €408 for a one-way ticket and €598 for a return.

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

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

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

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

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

    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 Shannon to San Francisco.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Shannon 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 Shannon to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to San Francisco with an airline and back to Shannon with another airline.

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

    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 San Francisco from Shannon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Shannon to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Shannon to San Francisco. 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 Shannon to San Francisco? 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 8940 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
Airline reviews

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

2.0 MediocreGeorge, Aug 2025HNL - SFO
Read more United Airlines reviews

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.