$823 Find Cheap Flights from Belfast to San Francisco

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast to San Francisco departing on 9/2. 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 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$823
British Airways
Wed 9/2Sun 9/6
BHD - SFO • 1 stop
Top airlines
Cheapest • from $823 (round-trip)
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Belfast to San Francisco

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

Wed, Sep 2 - Sun, Sep 6
British Airways Logo
6:30 am - 1:50 pm
BHD
-
SFO
15h 20m
1 stop
British Airways Logo
9:49 pm - 8:50 am
SFO
-
BHD
27h 01m
2 stops
$823British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
6:30 am - 1:50 pm
BHD
-
SFO
15h 20m
1 stop
British Airways Logo
9:49 pm - 8:50 am
SFO
-
BHD
27h 01m
2 stops
$824British Airways
Tue, Jul 28 - Tue, Aug 18
British Airways Logo
6:30 am - 1:50 pm
BHD
-
SFO
15h 20m
1 stop
British Airways Logo
9:56 am - 10:45 am
SFO
-
BHD
16h 49m
2 stops
$825British Airways
Wed, Jul 29 - Tue, Aug 18
American Airlines Logo
11:35 am - 12:58 am
BHD
-
SFO
21h 23m
2 stops
American Airlines Logo
10:16 am - 3:20 pm
SFO
-
BHD
21h 04m
2 stops
$827American Airlines
Mon, Jul 27 - Mon, Aug 17
British Airways Logo
6:30 am - 10:28 pm
BHD
-
SFO
23h 58m
2 stops
British Airways Logo
4:35 pm - 5:30 pm
SFO
-
BHD
16h 55m
1 stop
$829British Airways
Mon, Jul 27 - Mon, Aug 17
British Airways Logo
9:40 am - 8:54 pm
BHD
-
SFO
19h 14m
2 stops
British Airways Logo
11:22 am - 3:30 pm
SFO
-
BHD
20h 08m
2 stops
$831British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
6:30 am - 1:50 pm
BHD
-
SFO
15h 20m
1 stop
British Airways Logo
9:49 pm - 8:50 am
SFO
-
BHD
27h 01m
2 stops
$856British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
10:05 am - 9:33 pm
BHD
-
SFO
19h 28m
2 stops
British Airways Logo
9:49 pm - 8:50 am
SFO
-
BHD
27h 01m
2 stops
$861British Airways
Wed, Sep 2 - Sun, Sep 6
British Airways Logo
6:30 am - 1:50 pm
BHD
-
SFO
15h 20m
1 stop
British Airways Logo
4:35 pm - 5:40 pm
SFO
-
BHD
17h 05m
1 stop
$863British Airways
Mon, Jul 27 - Sun, Aug 16
British Airways Logo
7:35 pm - 1:50 pm
BHD
-
SFO
26h 15m
1 stop
British Airways Logo
4:35 pm - 2:35 pm
SFO
-
BHD
14h 00m
1 stop
$865British Airways
Booking Insights

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

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

How much is a round-trip flight from Belfast to San Francisco?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Belfast to San Francisco departing in September.

Good to know

Cheapest flight$823
Flight from Belfast City Airport to San Francisco

When to book flights from Belfast to San Francisco

Are your dates flexible? Find out the best times to travel from Belfast to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Belfast to San Francisco

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

    In the last 3 days, the lowest price for a flight from Belfast to San Francisco was $823 for a round-trip ticket.

  • Do I need a passport to fly between Belfast and San Francisco?

    Yes

  • Which airports will I be using when flying from Belfast to San Francisco?

    Belfast has 2 major airports: Belfast Intl and Belfast City. San Francisco is the only airport in San Francisco. You’ll usually find the cheapest deals if you fly from Belfast City Airport.

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

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

  • Which airline alliances offer flights from Belfast to San Francisco?

    oneworld is the only airline alliance operating flights between Belfast and San Francisco.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Belfast 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 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 Belfast 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 to Belfast with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Belfast 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 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 Belfast 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 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.
6.7
British AirwaysOverall score based on 7848 reviews
6.4Entertainment
7.6Crew
6.9Boarding
6.8Comfort
6.4Food
Airline reviews

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!

6.0 GoodAnonymous, Apr 2026
LHR - PIT
Read more British Airways reviews

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.

Crew were nice, food was good. Boarding was horrendous. We were driven around the airport in a bus forced to climb a long flight of very steep stairs with no adequate handrails to board the plane . In many many years of flying to the US I have never been required to do this . There was no assistance for those needing help getting up the stairs to the plane. A fellow passenger helped me. No idea how other elderly, physically limited passengers or those with young children managed . It was a full flight with crowds trying to get up the stairs. It was an accident waiting to happen.

Horrible, the plane is just old and junky...Filthy restroom, seat was as hard as rock. The food, mystery side dish, inedible..geez..just Horrible. Never flying BA again

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.

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

Information on your arrival and departure airports