Cheap flights from San Francisco to Northern Ireland from £234

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
24 Apr — 1 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Northern Ireland
Explore the most affordable flight options available from San Francisco to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2026.

Mon 9/1120:40
SFO
-
BHD
1 stop13h 55m
British Airways
Fri 13/1108:45
BHD
-
SFO
1 stop14h 15m
British Airways
Deal found 23/3£613
Tue 4/819:30
SFO
-
BHD
1 stop16h 10m
British Airways
Tue 18/818:20
BHD
-
SFO
1 stop27h 30m
British Airways
Deal found 22/3£618
Tue 4/815:37
SFO
-
BHD
2 stops17h 58m
American Airlines
Tue 18/813:45
BHD
-
SFO
2 stops17h 21m
American Airlines
Deal found 22/3£641
Tue 5/512:55
SFO
-
BFS
2 stops26h 25m
Multiple Airlines
Tue 12/520:15
BFS
-
SFO
2 stops28h 25m
Multiple Airlines
Deal found 21/3£647
Sat 17/1016:35
SFO
-
BHD
1 stop14h 30m
British Airways
Wed 21/1006:30
BHD
-
SFO
1 stop15h 20m
British Airways
Deal found 22/3£651
Thu 10/919:30
SFO
-
BHD
1 stop15h 55m
British Airways
Mon 14/911:35
BHD
-
SFO
1 stop34h 15m
British Airways
Deal found 24/3£655
Sat 5/916:35
SFO
-
BHD
1 stop14h 30m
British Airways
Sat 19/907:05
BHD
-
SFO
1 stop14h 45m
British Airways
Deal found 21/3£689
Sat 5/910:45
SFO
-
BHD
2 stops17h 40m
American Airlines
Sat 19/907:05
BHD
-
SFO
2 stops20h 11m
American Airlines
Deal found 21/3£697
Tue 2/606:00
SFO
-
BFS
3 stops26h 20m
Multiple Airlines
Tue 16/623:30
BFS
-
SFO
3 stops47h 00m
Multiple Airlines
Deal found 21/3£737
Tue 4/808:30
SFO
-
BFS
2 stops22h 45m
Multiple Airlines
Tue 18/807:35
BFS
-
SFO
3 stops39h 00m
Multiple Airlines
Deal found 22/3£787
Mon 1/606:00
SFO
-
BFS
2 stops29h 05m
Multiple Airlines
Mon 8/621:55
BFS
-
SFO
2 stops26h 00m
Multiple Airlines
Deal found 21/3£931
Sat 11/708:30
SFO
-
BFS
2 stops17h 05m
Multiple Airlines
Sun 26/707:10
BFS
-
SFO
3 stops36h 50m
Multiple Airlines
Deal found 22/3£934

Find flight deals from San Francisco to Northern Ireland

Keep the following information in mind while searching for San Francisco to Northern Ireland flight deals. Data was last updated 25 March 2026.

Round-trip from

£613

One-way from

£234

Popular in

June

Cheapest in

April

Average price

£646
British Airways
  • British Airways
  • 6/9-9/9
  • 2 total stops
  • 46h 50m total
  • San Francisco to Northern Ireland
KLM
  • KLM
  • 1/9
  • 1 total stop
  • 19h 10m total
  • San Francisco to Northern Ireland
Highest demand for flights based on searches. 15% potential increase in price (£84 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Average for round-trip flights in March 2026

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 March 2026.
Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 6/9

16:35-17:40

1 stop17h 05m

Belfast City

Wed 9/9

16:05-13:50

1 stop29h 45m

£613

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/5

12:55-23:20

2 stops26h 25m

Belfast Intl

Tue 12/5

20:15-16:40

2 stops28h 25m

£647

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 10/9

16:21-20:35

2 stops20h 14m

Belfast City

Mon 14/9

19:35-13:50

1 stop26h 15m

£665
Fastest return journey

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sat 5/9

10:45-12:25

2 stops17h 40m

Belfast City

Sat 19/9

07:05-19:16

2 stops20h 11m

£697

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 4/8

08:30-15:15

2 stops22h 45m

Belfast Intl

Tue 18/8

07:35-14:35

3 stops39h 00m

£787

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 8/7

14:00-16:55

2 stops18h 55m

Belfast City

Wed 22/7

09:50-11:45

1 stop33h 55m

£796

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 2/6

13:45-09:20

1 stop35h 35m

Belfast City

Tue 16/6

09:50-22:45

2 stops20h 55m

£822

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 15/5

13:45-09:20

1 stop35h 35m

Belfast City

Sun 24/5

09:50-11:45

1 stop33h 55m

£831

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sat 23/5

19:30-18:15

1 stop14h 45m

Belfast City

Mon 1/6

18:30-13:50

1 stop27h 20m

£849

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 1/6

06:00-19:05

2 stops29h 05m

Belfast Intl

Mon 8/6

21:55-15:55

2 stops26h 00m

£931

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 28 resultsSorted by cheapest first
1
2
3

Best time to book a flight from San Francisco to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Northern Ireland

What is the cheapest month to book a flight from San Francisco to Northern Ireland?

Currently, April is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of £438). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of £905). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from San Francisco to Northern Ireland?

    San Francisco (SFO), located 11.0 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Northern Ireland.

  • How long is the flight from San Francisco to Northern Ireland?

    For as low as £613, British Airways can have you in Northern Ireland from San Francisco in 17h 05m. The distance between San Francisco and Northern Ireland is about 5038 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from San Francisco to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on San Francisco to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Northern Ireland.

  • Can I find deals for business class flights from San Francisco to Northern Ireland?

    Yes. Cheapflights offers flight deals from San Francisco to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Northern Ireland?

    Currently, April is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of £438). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of £905). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Northern Ireland?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Northern Ireland from San Francisco today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Northern Ireland?

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Northern Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from San Francisco to Northern Ireland with no change fees?

Need flexible booking options for your flight to Northern Ireland from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from San Francisco to Northern Ireland become cheaper?

Of course! You can now track prices for flights from San Francisco to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.