$435 Find Cheap Flights from Ireland 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 to San Francisco departing on 10/20. 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

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 for flights 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 for flights to San Francisco, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ireland to San Francisco

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ireland 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 round-trip flight deals from Ireland to San Francisco

Tue, Sep 1 - Sat, Sep 12
Scandinavian Airlines Logo
7:05 pm - 2:40 pm
DUB
-
SFO
27h 35m
1 stop
Scandinavian Airlines Logo
4:45 pm - 10:25 am
SFO
-
DUB
33h 40m
2 stops
$637Scandinavian Airlines
Wed, Sep 16 - Wed, Oct 7
Scandinavian Airlines Logo
7:05 pm - 2:40 pm
DUB
-
SFO
27h 35m
1 stop
Scandinavian Airlines Logo
4:45 pm - 6:20 pm
SFO
-
DUB
17h 35m
1 stop
$638Scandinavian Airlines
Tue, Sep 15 - Fri, Sep 25
Delta Logo
6:15 am - 11:45 am
ORK
-
SFO
13h 30m
1 stop
Delta Logo
9:47 am - 4:40 pm
SFO
-
ORK
22h 53m
2 stops
$689Delta
Tue, Sep 15 - Fri, Sep 25
Delta Logo
6:15 am - 3:54 pm
ORK
-
SFO
17h 39m
2 stops
Delta Logo
9:47 am - 4:40 pm
SFO
-
ORK
22h 53m
2 stops
$695Delta
Tue, Sep 15 - Fri, Sep 25
KLM Logo
5:10 pm - 11:45 am
ORK
-
SFO
26h 35m
1 stop
KLM Logo
3:05 pm - 2:25 pm
SFO
-
ORK
15h 20m
1 stop
$708KLM
Fri, Dec 4 - Mon, Dec 7
British Airways Logo
7:50 am - 6:45 pm
SNN
-
SFO
18h 55m
1 stop
British Airways Logo
12:20 pm - 4:45 pm
SFO
-
SNN
20h 25m
2 stops
$852British Airways
Wed, Dec 2 - Sun, Dec 6
British Airways Logo
7:40 am - 2:55 pm
ORK
-
SFO
15h 15m
1 stop
British Airways Logo
5:25 pm - 9:00 pm
SFO
-
ORK
19h 35m
1 stop
$853British Airways
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
12:30 pm - 7:14 pm
SNN
-
SFO
14h 44m
1 stop
United Airlines Logo
5:00 am - 7:30 am
SFO
-
SNN
18h 30m
2 stops
$861United Airlines
Thu, Sep 3 - Mon, Sep 7
United Airlines Logo
12:30 pm - 7:14 pm
SNN
-
SFO
14h 44m
1 stop
United Airlines Logo
5:00 am - 7:30 am
SFO
-
SNN
18h 30m
2 stops
$862United Airlines
Wed, Jul 8 - Mon, Jul 13
KLM Logo
10:50 am - 11:45 am
ORK
-
SFO
32h 55m
1 stop
KLM Logo
3:05 pm - 2:40 pm
SFO
-
ORK
15h 35m
1 stop
$903KLM
Booking Insights

KAYAK's insights & trends for flights to San Francisco

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

What is the cheapest flight to San Francisco?

These are the best round-trip prices found by users searching on KAYAK in the last 5 days.

In the last 5 days, the cheapest flight deal to San Francisco was found on the route from Shannon, at $637 return. The most popular connection is from Dublin to San Francisco and KAYAK users have found round-trip deals for as low as $637 in the last 5 days.

What is the cheapest day to fly to San Francisco?

The average price of all round-trip flights to San Francisco clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to San Francisco is Tuesday where round-trip tickets can be as cheap as $638. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $1,082 on average.

What is the cheapest month to fly to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to San Francisco, 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 to San Francisco is October, where tickets cost $285 on average for return flights. On the other hand, the most expensive months are July and June, where the average cost of tickets from Ireland is $672 and $519 respectively. For one-way flights, the best month to travel is November with an average price of $343.

What is the cheapest time of day to fly to San Francisco?

The average price for all round-trip flights to San Francisco depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to San Francisco is generally in the morning, when round-trip flights cost $661 on average. The most expensive time of day to fly to San Francisco is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $751.

What is a good deal for flights to San Francisco?

If you’re looking for cheap airfare to San Francisco, 25% of our users found tickets to San Francisco for the following prices or less: From Dublin $750 round-trip.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 2 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$435
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 35% increase in price.
Flight from Shannon to San Francisco

FAQs - booking San Francisco flights

  • What is the cheapest flight to San Francisco?

    In the last 5 days, the cheapest flight deal to San Francisco was found on the route from Shannon, at $637 return. The most popular connection is from Dublin to San Francisco and KAYAK users have found round-trip deals for as low as $637 in the last 5 days.

  • How far is San Francisco Airport from central San Francisco?

    You’ll need to travel 11 miles to reach the San Francisco city center from San Francisco Airport.

  • What is the name of San Francisco’s airport?

    There is only 1 airport in San Francisco, called San Francisco Airport (SFO). It can also be referred to as San Francisco or San Francisco Intl.

  • How much is a flight to San Francisco?

    On average, a flight to San Francisco costs $749. The cheapest price found on KAYAK in the last 2 weeks cost $616 and departed from Dublin Airport.

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

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

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

    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 San Francisco with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to San Francisco

  • Looking for cheap airfare to San Francisco? 25% of our users found round-trip tickets to San Francisco for the following prices or less: From Dublin $693
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest San Francisco flight deals.

Reviews of the top airlines flying from Ireland to San Francisco

 
See real verified KAYAK customer reviews for airlines flying to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to San Francisco. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with 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 9861 reviews
6.7Food
7.1Entertainment
7.3Comfort
7.7Boarding
8.1Crew
Airline reviews

The flight got delayed. They forgot to bring the drinks when I asked for it. The toilet is messy.

6.0 GoodAnonymous, Jun 2026
TPE - SFO
Read more United Airlines reviews

The flight got delayed. They forgot to bring the drinks when I asked for it. The toilet is messy.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Crew was great! Good meals. Had room to stretch out

How can you rate a flight when it is canceled after you leave the gate & 3 hours into sitting there or in remote area of airport after mechanical problems

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

First class ticket gets you no seat back entertainment? I have to bring my own laptop to see a movie? And most of their movies have ADS? No thank you. Worse: Tiny snacks only on a 2 hr flight?

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

From Rome to Dublin if you want any refreshments you have to pay for them, Not used to this as we typically get soft drinks and a little snack on a 3hour flight in the US.

Boarding was fine, difficult to understand the guy over the speaker though so we were unsure when exactly to board until they updated the monitor by the gate. Flight itself was fine, nice flight attendants, seats were comfortable enough, good selection of entertainment on the screens. Other airlines at a similar price point have included wifi though, at a minimum messaging, for free, so that was a little disappointing to not have that. But otherwise fine. Food was pretty decent, nice hot meal, good drink selection, nice snacks. Bathrooms were ok, could've been cleaned a little more often, but they were never bad.

Vegetarian food option was very poor. Effectively, overcooked rice ("risotto"). Zero protein which is always disappointing with no vegetables and poorly seasoned. Basically had lots of carbs on 6-hour flight. Not acceptable for business class in 2026. Flight was otherwise very good.

Small plane. Tight seating . What can one say except that it was fast!

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Calistoga
Rohnert Park
Marina
Emeryville
Pacifica
Capitola
Millbrae
Campbell
Newark
Novato
Mill Valley
Windsor
Union City
West Sacramento
Belmont
Richmond
American Canyon
Corte Madera
Jenner
Los Altos

Everything you need to know for your flight to San Francisco

Information on the airport you'll fly into in San Francisco