SNN - SFO

€532 Find Cheap Flights from Shannon to San Francisco

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Shannon to San Francisco departing on 5/3. 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
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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, 5 Mar - Mon, 9 Mar
American Airlines Logo
07:50 - 15:00SNN-SFO
15h 10m1 stop
American Airlines Logo
18:30 - 16:45SFO-SNN
15h 15m1 stop
€532American Airlines
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Thu, 5 Mar - Mon, 9 Mar
American Airlines Logo
07:50 - 20:48SNN-SFO
20h 58m2 stops
American Airlines Logo
07:26 - 11:30SFO-SNN
21h 04m2 stops
€537American Airlines
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Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
07:50 - 22:08SNN-SFO
22h 18m2 stops
American Airlines Logo
07:20 - 05:55SFO-SNN
14h 35m1 stop
€560American Airlines
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Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
14:00 - 23:59SNN-SFO
17h 59m1 stop
American Airlines Logo
07:20 - 05:55SFO-SNN
14h 35m1 stop
€561American Airlines
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Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
07:50 - 20:28SNN-SFO
20h 38m2 stops
American Airlines Logo
07:20 - 05:55SFO-SNN
14h 35m1 stop
€579American Airlines
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Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
14:00 - 23:59SNN-SFO
17h 59m1 stop
American Airlines Logo
07:20 - 05:55SFO-SNN
14h 35m1 stop
€581American Airlines
Find Deal
Tue, 11 Nov - Thu, 20 Nov
American Airlines Logo
07:50 - 20:28SNN-SFO
20h 38m2 stops
American Airlines Logo
06:00 - 06:20SFO-SNN
16h 20m2 stops
€602American Airlines
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Tue, 11 Nov - Thu, 20 Nov
Multiple Airlines Logo
07:50 - 21:22SNN-SFO
21h 32m2 stops
Multiple Airlines Logo
13:20 - 16:45SFO-SNN
19h 25m2 stops
€644Multiple Airlines
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Fri, 28 Nov - Tue, 2 Dec
Air Canada Logo
20:05 - 21:34SNN-SFO
33h 29m2 stops
Air Canada Logo
11:20 - 16:45SFO-SNN
21h 25m2 stops
€2,863Air Canada
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Fri, 28 Nov - Tue, 2 Dec
British Airways Logo
07:50 - 15:00SNN-SFO
15h 10m1 stop
British Airways Logo
08:00 - 11:30SFO-SNN
19h 30m2 stops
€3,056British Airways
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Everything you should know

Top airlines
American Airlines
Cheapest • from €532 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest return fare
€532
American Airlines
Thu 5/3Mon 9/3
SNN - SFO • 1 stop
Cheapest one-way flight
€621
Aer Lingus
Fri 24/10
SNN - SFO • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
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 American Airlines (€532) and Air Canada (€2,863).

Which airlines fly direct between Shannon and San Francisco?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Shannon to San Francisco.

There is just one airline that flies from Shannon to San Francisco direct and that is United Airlines. The best return deal found from United Airlines for the route is €567.

Good to know

Low seasonMarch
Cheapest flight€532
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (3% more expensive 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 €725 for a one-way ticket and €621 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 is the only airline alliance operating flights between Shannon and San Francisco.

  • 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 8982 reviews
7.7Boarding
7.1Entertainment
8.1Crew
6.6Food
7.3Comfort
Airline reviews

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

6.0 GoodLucia, Oct 2025BNA - SFO
Read more United Airlines reviews

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

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.

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