BFS - SFO

$419 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 6/14. 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

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

Everything you should know

Cheapest round-trip
$1,182
Typical prices: $588-$1,201
Multiple Airlines
Thu 3/26Thu 4/2
BFS - SFO • 2 stops
Cheapest one-way
$419
Multiple Airlines
Sun 6/14
BFS - SFO • 3 stops
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We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight 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 round-trip 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 round-trip flight deals from Belfast Intl to San Francisco

Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
6:15 am - 5:05 pm
BFS
-
SFO
41h 50m
2 stops
Multiple Airlines Logo
5:55 pm - 11:00 pm
SFO
-
BFS
21h 05m
1 stop
$1,182Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
10:00 pm - 9:22 pm
BFS
-
SFO
31h 22m
3 stops
Multiple Airlines Logo
4:45 pm - 6:25 pm
SFO
-
BFS
17h 40m
3 stops
$1,183Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
10:00 pm - 9:22 pm
BFS
-
SFO
31h 22m
3 stops
Multiple Airlines Logo
2:40 pm - 11:35 pm
SFO
-
BFS
24h 55m
2 stops
$1,209Multiple Airlines
Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
6:25 pm - 9:10 pm
BFS
-
SFO
33h 45m
1 stop
Multiple Airlines Logo
5:55 pm - 11:25 pm
SFO
-
BFS
21h 30m
1 stop
$1,284Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
10:05 pm - 12:40 pm
BFS
-
SFO
22h 35m
2 stops
Multiple Airlines Logo
2:40 pm - 11:35 pm
SFO
-
BFS
24h 55m
2 stops
$1,294Multiple Airlines
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
10:10 pm - 9:21 pm
BFS
-
SFO
31h 11m
3 stops
Multiple Airlines Logo
3:15 pm - 11:20 pm
SFO
-
BFS
24h 05m
3 stops
$1,355Multiple Airlines
Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
2:25 pm - 5:05 pm
BFS
-
SFO
33h 40m
2 stops
Multiple Airlines Logo
1:45 pm - 11:20 pm
SFO
-
BFS
25h 35m
2 stops
$1,372Multiple Airlines
Thu, Mar 26 - Thu, Apr 2
Multiple Airlines Logo
2:25 pm - 5:05 pm
BFS
-
SFO
33h 40m
2 stops
Multiple Airlines Logo
8:30 am - 10:50 pm
SFO
-
BFS
30h 20m
3 stops
$1,432Multiple Airlines
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
10:05 pm - 12:40 pm
BFS
-
SFO
22h 35m
2 stops
Multiple Airlines Logo
1:45 pm - 1:50 pm
SFO
-
BFS
16h 05m
1 stop
$1,483Multiple Airlines
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
6:20 am - 4:15 pm
BFS
-
SFO
17h 55m
2 stops
Multiple Airlines Logo
5:35 pm - 8:45 pm
SFO
-
BFS
19h 10m
2 stops
$1,484Multiple Airlines
Booking Insights

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.

How much is a round-trip flight from Belfast Intl Airport 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 Intl Airport to San Francisco departing in March.

Good to know

Low seasonSeptember
Cheapest flight$419
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 20% lower 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 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 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 $419 for a one-way ticket and $1,182 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Belfast Intl Airport and on arrival in San Francisco.

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

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

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

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

  • 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 travelers 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 round-trip ticket. You could then fly to San Francisco with an airline and back to Belfast Intl Airport with another airline. Booking your flights between Belfast Intl Airport and SFO can sometimes prove cheaper using this method.

  • 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.

Reviews of the top airline 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.
6.7
British AirwaysOverall score based on 7772 reviews
7.6Crew
6.9Boarding
6.4Food
6.8Comfort
6.4Entertainment
Airline reviews

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.

4.0 OkayDaniel, Feb 2026
LHR - BWI
Read more British Airways reviews

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.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

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

Information on your arrival and departure airports