£528 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 19/9. 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, 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

Wed, 3 Jun - Wed, 10 Jun
Multiple Airlines Logo
07:00 - 16:35
BFS
-
SFO
41h 35m
3 stops
Multiple Airlines Logo
06:00 - 19:15
SFO
-
BFS
29h 15m
2 stops
£670Multiple Airlines
Tue, 2 Jun - Tue, 9 Jun
Multiple Airlines Logo
06:40 - 14:35
BFS
-
SFO
39h 55m
3 stops
Multiple Airlines Logo
06:00 - 19:40
SFO
-
BFS
29h 40m
3 stops
£680Multiple Airlines
Wed, 3 Jun - Wed, 10 Jun
Multiple Airlines Logo
07:30 - 16:35
BFS
-
SFO
41h 05m
3 stops
Multiple Airlines Logo
06:00 - 19:15
SFO
-
BFS
29h 15m
2 stops
£694Multiple Airlines
Wed, 3 Jun - Wed, 10 Jun
Multiple Airlines Logo
07:30 - 16:35
BFS
-
SFO
41h 05m
3 stops
Multiple Airlines Logo
06:00 - 17:05
SFO
-
BFS
27h 05m
3 stops
£722Multiple Airlines
Wed, 3 Jun - Wed, 10 Jun
Multiple Airlines Logo
07:00 - 16:35
BFS
-
SFO
41h 35m
3 stops
Multiple Airlines Logo
06:00 - 19:15
SFO
-
BFS
29h 15m
3 stops
£755Multiple Airlines
Sun, 17 May - Sun, 24 May
Multiple Airlines Logo
12:20 - 21:25
BFS
-
SFO
17h 05m
1 stop
Multiple Airlines Logo
17:55 - 21:55
SFO
-
BFS
20h 00m
1 stop
£757Multiple Airlines
Mon, 18 May - Mon, 25 May
Multiple Airlines Logo
10:50 - 14:40
BFS
-
SFO
35h 50m
2 stops
Multiple Airlines Logo
16:45 - 23:05
SFO
-
BFS
22h 20m
2 stops
£780Multiple Airlines
Tue, 19 May - Tue, 26 May
Multiple Airlines Logo
06:15 - 18:00
BFS
-
SFO
19h 45m
2 stops
Multiple Airlines Logo
15:05 - 20:55
SFO
-
BFS
21h 50m
2 stops
£786Multiple Airlines
Mon, 18 May - Mon, 25 May
Multiple Airlines Logo
12:15 - 14:40
BFS
-
SFO
34h 25m
3 stops
Multiple Airlines Logo
16:45 - 20:55
SFO
-
BFS
20h 10m
2 stops
£823Multiple Airlines
Tue, 19 May - Tue, 26 May
Multiple Airlines Logo
07:00 - 12:00
BFS
-
SFO
37h 00m
3 stops
Multiple Airlines Logo
08:05 - 19:40
SFO
-
BFS
27h 35m
3 stops
£826Multiple 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 £201 on average.

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

Low seasonSeptember
Cheapest flight£528
Best time to beat the crowds (43% less expensive on average)
Most popular time to fly and prices are also 27% 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 11646 reviews
6.9Entertainment
6.4Food
7.2Comfort
7.5Boarding
7.9Crew
Airline reviews

Flight: Started on time. Comfortable flight. Arrived on time. Crew: Very cordial and helpful. Drinks and snack was served with a smile. Overall enjoyed the trip. Regards, Hari Doss Chanchala Doss

10.0 ExcellentHari, Apr 2026
MCO - SFO
Read more American Airlines reviews

Flight: Started on time. Comfortable flight. Arrived on time. Crew: Very cordial and helpful. Drinks and snack was served with a smile. Overall enjoyed the trip. Regards, Hari Doss Chanchala Doss

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

American Airlines is a miserable experience. It is predictably miserable, in the sense that every time I fly American, I brace myself for the certainty that it will be unpleasant and uncomfortable. But it is unpredictable in the sense that I never know if the flight will be on time or delayed nine hours (both happened to me this week). I never know if I will be able to sit in the seat that I selected when I purchased the ticket or if I will be told by Customer Service (!!!) that I must relocate from first class to a seat in the back of the aircraft with no explanation (both happened to me this week). Will the food be frozen and half defrosted, or scalding hot? Will the drinks be warm? Will the flight attendants be surly and mean? Will the toilets be cramped and foul? Will the seats be narrow and uncomfortable? Will there be a real electric outlet at the seat, or just an unreliable USB-2 port? Will there be enough seats in the boarding lounge or just a few? Will the boarding process be smooth and efficient, or will the gate agents mess it up and delay it needlessly for 30 or 40 minutes? Will the catering and cleaning crew be prompt or will they take an extra 30 minutes? Will the brakes on the aircraft work properly, or will the pilot delay takeoff for four hours while the ground crew attends to what can only be described as routine maintenance that should have been done the night before? I've eexperienced every one of these unpleasant things this year, 2026. The only thing I can reliably count on is that American will find a new way to make the experience of flying as miserable as they possibly can.

Wifi was spotty. Tray table was very dirty when I sat down.

The WiFi would not connect enough for me to do my actual work. It permaspooled, disconnected, said it was connected, then wouldn't open an email... it was frustrating. I am not a tall person, 5'4" - and I felt cramped with little room to reach into my bag under the seat in front of me. I feel sorry for anyone taller than me having to fly. the one positive thing I will add, is the overhead bins are roomy enough to manage more bags than other carriers.

Buying ticket from kayak instant booking was a huge mistake, never to be repeated again! The Kayak didn’t book the tickets directly, it handed it off to a third party Underpricer, that booked a code shared American Airlines flight operated by Cathay Pacific!! When managing the booking American Airlines would recognize the itinerary but wouldn’t let me do anything stating, the flight is operated by Cathay Pacific so go to their website. Cathay Pacific would recognize the itinerary, neither by reservation ID or ticket number…asking to reach out to the third party Underpricer….calling Underpricer resulted in no help like seat requests, mileage number or upgrade request, 15hr layover accommodation voucher guidance…so net in net avoid booking through three layers of intermediaries

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Flight was on time. Cabin attendants made no recognition of my name or being an Advantage Executive Platinum member.

Delayed for mechanical and no updates on what was happening and how long the delay might be.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

There was a delay for the San Francisco-London flight, but we were all informed via text and email. The staff was very friendly and nice and the food was good. I do recommend that the airline offer something without eggs or something vegan for the vegetarian meal option. A lot of Indians are lacto-vegetarian, while some could be allergic to eggs/dairy.

food options were terrible. for a 10-hour flight, there should be 2 decent meals. Also, flight attendants should come around with drinks more than just at the meals.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

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

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