£298 Find Cheap Flights from Belfast Intl Airport to San Francisco Bay Area

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 Bay Area departing on 28/4. 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 Bay Area

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to San Francisco Bay Area, 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 Bay Area, as well as popular online travel agencies
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Flight Deals

Book Cheap Belfast Intl to San Francisco Bay Area Plane Tickets

 
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 Bay Area 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 Bay Area

Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
08:40 - 17:05
BFS
-
SFO
40h 25m
3 stops
Multiple Airlines Logo
17:40 - 21:30
SFO
-
BFS
19h 50m
2 stops
£764Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
06:10 - 17:55
BFS
-
SFO
19h 45m
1 stop
Multiple Airlines Logo
19:40 - 09:55
SFO
-
BFS
30h 15m
2 stops
£767Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
17:05 - 14:40
BFS
-
SFO
29h 35m
2 stops
Multiple Airlines Logo
16:45 - 21:30
SFO
-
BFS
20h 45m
2 stops
£768Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
09:55 - 16:35
BFS
-
SFO
38h 40m
3 stops
Multiple Airlines Logo
08:30 - 16:30
SFO
-
BFS
24h 00m
3 stops
£805Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
09:55 - 16:35
BFS
-
SFO
38h 40m
3 stops
Multiple Airlines Logo
14:40 - 21:10
SFO
-
BFS
22h 30m
2 stops
£809Multiple Airlines
Wed, 15 Apr - Wed, 22 Apr
Multiple Airlines Logo
06:15 - 18:00
BFS
-
SFO
19h 45m
1 stop
Multiple Airlines Logo
20:10 - 19:35
SFO
-
BFS
15h 25m
1 stop
£812Multiple Airlines
Mon, 31 Aug - Sun, 6 Sep
Multiple Airlines Logo
18:50 - 12:40
BFS
-
SFO
25h 50m
2 stops
Multiple Airlines Logo
17:40 - 21:30
SFO
-
BFS
19h 50m
2 stops
£820Multiple Airlines
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
21:10 - 12:00
BFS
-
SFO
46h 50m
3 stops
Multiple Airlines Logo
14:40 - 23:00
SFO
-
BFS
24h 20m
2 stops
£830Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
22:00 - 12:10
BFS
-
SFO
46h 10m
3 stops
Multiple Airlines Logo
08:30 - 23:35
SFO
-
BFS
31h 05m
3 stops
£831Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
22:00 - 12:10
BFS
-
SFO
46h 10m
3 stops
Multiple Airlines Logo
13:45 - 18:50
SFO
-
BFS
21h 05m
2 stops
£837Multiple Airlines
Booking Insights

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

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

Can I save money by flying with a stopover from Belfast Intl Airport to San Francisco Bay Area?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £204 on average.

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

Low seasonSeptember
Cheapest flight£298
Best time to beat the crowds (37% less expensive on average)
Most popular time to fly and prices are also 26% lower on average.
Flight from Belfast Intl Airport to San Francisco

FAQs - booking San Francisco Bay Area flights

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

    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 Bay Area.

  • 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 Bay Area?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belfast Intl Airport to San Francisco Bay Area 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 Bay Area?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Belfast Intl Airport to San Francisco Bay Area 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 from Belfast Intl Airport to San Francisco Bay Area?

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

Reviews of the top airlines flying from Belfast Intl to San Francisco Bay Area

 
See real verified KAYAK customer reviews for airlines flying from Belfast to San Francisco Bay Area. 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 Bay Area? 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.
7.1
American AirlinesOverall score based on 11487 reviews
6.4Food
6.9Entertainment
7.9Crew
7.5Boarding
7.2Comfort
Airline reviews

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

10.0 ExcellentFraxys, Feb 2026
DFW - ONT
Read more American Airlines reviews

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

We were upgraded to Business Class. So comfortable with great service and food options

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

The comfort of Business Class made this trip far more comfortable. I was indeed surprised when I asked one of the flight attendant to help me set up my "bed", she responded that "We don't make beds in Business Class any longer...only First Class" I believe her name was Giselle, but I'm not certain. She did instruct me how to adjust the seat, place the hooded cover and I clearly understood how to place the blanket and the cover. Additionally, the meal I was served (a beef dish) was almost inedible. The beef was tough and odd tasting. I didn't mention it as I was hoping to quickly settle down and try to get some sleep.

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

the service on Business class should be improved to be at par with industry leaders like Cathay Pacific and Singapore AIrlines. A lot of room for improvement.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Everything you need to know for your flight to San Francisco Bay Area

Information on your arrival and departure airports