BFS - SFO

£433 Find Cheap Flights from Belfast Intl Airport 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 Belfast Intl to San Francisco departing on 20/7. 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 Belfast 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 Belfast to San Francisco, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Belfast Intl to San Francisco (BFS-SFO)

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

ven., 12 sept. - ven., 19 sept.
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06:05 - 19:30BFS-SFO
21h 25m1 stop
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16:05 - 09:25SFO-BFS
33h 20m1 stop
ven., 12 sept. - ven., 19 sept.
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06:05 - 11:45BFS-SFO
37h 40m2 stops
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16:05 - 09:25SFO-BFS
33h 20m1 stop
ven., 12 sept. - ven., 19 sept.
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06:05 - 11:11BFS-SFO
37h 06m2 stops
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11:40 - 09:25SFO-BFS
37h 45m2 stops
ven., 25 juil. - ven., 1 août
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10:55 - 13:50BFS-SFO
34h 55m1 stop
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06:00 - 22:35SFO-BFS
32h 35m2 stops
mer., 16 juil. - mer., 23 juil.
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06:00 - 19:30BFS-SFO
21h 30m1 stop
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16:05 - 23:10SFO-BFS
23h 05m1 stop
mer., 2 juil. - mer., 9 juil.
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05:45 - 09:30BFS-SFO
35h 45m3 stops
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07:30 - 18:35SFO-BFS
27h 05m3 stops
mer., 2 juil. - mer., 9 juil.
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07:15 - 18:15BFS-SFO
19h 00m2 stops
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13:45 - 15:30SFO-BFS
17h 45m2 stops
mer., 2 juil. - mer., 9 juil.
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05:45 - 09:30BFS-SFO
35h 45m3 stops
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08:40 - 18:35SFO-BFS
25h 55m2 stops
dim., 27 juil. - dim., 3 août
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06:45 - 09:30BFS-SFO
34h 45m3 stops
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08:40 - 23:20SFO-BFS
30h 40m2 stops
ven., 25 juil. - ven., 1 août
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08:35 - 09:30BFS-SFO
32h 55m3 stops
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07:30 - 11:50SFO-BFS
20h 20m3 stops
Useful Info

KAYAK's insights & trends for Belfast Intl to San Francisco flights

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

What is the cheapest month to fly from Belfast Intl Airport to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Belfast Intl Airport 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 from Belfast Intl Airport to San Francisco is April, where tickets cost £447 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is £729 and £715 respectively.


Good to know - Cheap tickets from Belfast Intl Airport to San Francisco

Low seasonFebruary
High seasonJune
Cheapest flight£433
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from Belfast Intl Airport to San Francisco

When to book flights from Belfast Intl to San Francisco

Are your dates flexible? Find out the best times to travel from Belfast Intl 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 Belfast Intl Airport to San Francisco flights

  • What is the cheapest flight from Belfast Intl Airport to San Francisco?

    In the last 3 days, the lowest price for a flight from Belfast Intl Airport to San Francisco was £589 for a one-way ticket and £770 for a return.

  • Which aircraft models fly most regularly from Belfast Intl Airport to San Francisco?

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

  • How does KAYAK find such low prices on flights from Belfast Intl Airport 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 Belfast Intl Airport to San Francisco.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Belfast Intl Airport is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Belfast Intl Airport 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 Belfast Intl Airport with another airline.

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

Top airlines flying from Belfast Intl to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Belfast 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 Belfast Intl 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.
7.2
American AirlinesOverall score based on 10000 reviews
6.5Food
7.5Boarding
8.0Crew
6.9Entertainment
7.2Comfort
Airline reviews

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

8.0 ExcellentJacqueline, Jun 2025PHL - LAX
Read more American Airlines reviews

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

Long 5 hour and 45 min flight and only one drink service and cookie snack

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Flight boarded from Gate 39 at OGG, the farthest gate in the terminal. There were no Hawaiian themed amenities for the flight. The first class service was mediocre at best; I received not special welcome or recognition as an executive platinum member of American Advantage program. The flight attendants were more concerned with their cell phones than saying "thank you" to the passengers as we disembarked. Fortunately, the flight arrived at LAX a few minutes early.

Bigger seats. Board back to front! Disembark front to back!

Extraordinary service in business class, and very good breakfast and snacks. A really lovely flight.

This flight didn’t happen because AA agents didn’t let us board the flight

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

The service and food needs to improve to catch up with other international flights

Would have been good to have a meal since it was a 5.5 hour flight

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Boarding was fairly chaotic. One of your employees clipped my ankle as he was passing with an empty wheelchair and not only did not apologize but stated something to the effect of “oh forGod’s sake.” There was plenty of room for him to pass. otherwise, everything was excellent.

Fantastic! Great seats! Friendly staff! Amazing selection of shows and movies! Smooth ride! I don’t know what more I could have asked for honestly. They made flying a breeze this time around.

Everything you need to know for your flight from Belfast Intl to San Francisco

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