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Cheap flights from San Francisco to Belfast from £236

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BHD
26 Feb — 5 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Belfast
Explore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 January 2026.

Tue 14/419:40
SFO
-
BFS
1 stop30h 05m
Multiple Airlines
Wed 22/420:10
BFS
-
SFO
2 stops29h 45m
Multiple Airlines
Deal found 24/1£406
Tue 14/419:40
SFO
-
BFS
1 stop30h 05m
Multiple Airlines
Mon 20/420:15
BFS
-
SFO
2 stops29h 40m
Multiple Airlines
Deal found 24/1£413
Thu 16/419:40
SFO
-
BFS
2 stops19h 50m
Multiple Airlines
Wed 22/409:35
BFS
-
SFO
1 stop40h 20m
Multiple Airlines
Deal found 24/1£433
Wed 26/815:21
SFO
-
BHD
2 stops19h 24m
British Airways
Wed 2/919:40
BHD
-
SFO
1 stop26h 10m
British Airways
Deal found 26/1£474
Wed 15/417:35
SFO
-
BFS
2 stops21h 35m
Multiple Airlines
Wed 22/409:35
BFS
-
SFO
1 stop40h 20m
Multiple Airlines
Deal found 24/1£491
Wed 4/317:30
SFO
-
BHD
1 stop15h 05m
British Airways
Sun 8/310:40
BHD
-
SFO
1 stop36h 20m
British Airways
Deal found 25/1£495
Fri 8/516:35
SFO
-
BHD
1 stop17h 35m
British Airways
Mon 11/518:30
BHD
-
SFO
1 stop27h 20m
British Airways
Deal found 25/1£503
Thu 30/419:30
SFO
-
BHD
1 stop15h 15m
British Airways
Sun 10/506:30
BHD
-
SFO
1 stop15h 20m
British Airways
Deal found 26/1£521
Tue 10/308:25
SFO
-
BFS
2 stops23h 00m
Multiple Airlines
Tue 17/317:30
BFS
-
SFO
2 stops27h 10m
Multiple Airlines
Deal found 23/1£540
Tue 14/419:40
SFO
-
BFS
1 stop30h 05m
Multiple Airlines
Tue 21/408:20
BFS
-
SFO
2 stops23h 35m
Multiple Airlines
Deal found 24/1£552
Tue 14/419:40
SFO
-
BFS
1 stop30h 05m
Multiple Airlines
Sun 19/420:50
BFS
-
SFO
2 stops27h 25m
Multiple Airlines
Deal found 24/1£587
Wed 27/511:45
SFO
-
BHD
2 stops17h 50m
British Airways
Thu 4/606:30
BHD
-
SFO
1 stop15h 20m
British Airways
Deal found 26/1£614

Find flight deals from San Francisco to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 January 2026.

Round-trip from

£495

One-way from

£236

Popular in

June

Cheapest in

April

Average price

£556
British Airways
  • British Airways
  • 4/3-8/3
  • 2 total stops
  • 51h 25m total
  • San Francisco to Belfast
Search Deals
18/2
  • 18/2
  • 2 total stops
  • 19h 05m total
  • San Francisco to Belfast
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Belfast 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 27 January 2026.
Use the filters below to find and compare flights from San Francisco to Belfast that are best for you.

Fly from

San Francisco

Fly to

Belfast

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 14/4

19:40-09:45

1 stop30h 05m

Belfast Intl

Wed 22/4

20:10-17:55

2 stops29h 45m

£406

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 14/4

19:40-09:45

1 stop30h 05m

Belfast Intl

Mon 20/4

20:15-17:55

2 stops29h 40m

£413

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 15/4

17:35-23:10

2 stops21h 35m

Belfast Intl

Wed 22/4

09:35-17:55

1 stop40h 20m

£491

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 4/3

17:30-16:35

1 stop15h 05m

Belfast City

Sun 8/3

17:35-16:00

1 stop29h 25m

£495

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 8/5

19:30-18:10

1 stop14h 40m

Belfast City

Mon 11/5

19:35-13:50

1 stop26h 15m

£503

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 30/4

19:30-18:45

1 stop15h 15m

Belfast City

Sun 10/5

06:30-13:50

1 stop15h 20m

£521

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 10/3

08:25-14:25

2 stops23h 00m

Belfast Intl

Tue 17/3

17:30-13:40

2 stops27h 10m

£540

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 14/4

19:40-09:45

1 stop30h 05m

Belfast Intl

Tue 21/4

08:20-23:55

2 stops23h 35m

£552

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 14/4

19:40-09:45

1 stop30h 05m

Belfast Intl

Sun 19/4

20:50-16:15

2 stops27h 25m

£587

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 27/5

11:45-13:35

2 stops17h 50m

Belfast City

Thu 4/6

06:30-13:50

1 stop15h 20m

£614

Flights are sorted by cheapest return flights first.

Deals found on 24/1

Showing 1-10 of 31 results
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Best time to book a flight from San Francisco to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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 Belfast

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

Currently, April is the cheapest month in which you can book a flight from San Francisco to Belfast (average of £429). Flying from San Francisco to Belfast in December is currently the most expensive (average of £802). 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 Belfast. 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 Belfast?

    If you book a flight to Belfast from San Francisco, you will be flying from San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco. There are 0 flights from San Francisco to Belfast per day from 0 different airlines.

  • How long is the flight from San Francisco to Belfast?

    Departing from San Francisco to Belfast will take you 15h 05m. The distance between San Francisco and Belfast is about 5038 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Belfast 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 Belfast?

    Currently, April is the cheapest month in which you can book a flight from San Francisco to Belfast (average of £429). Flying from San Francisco to Belfast in December is currently the most expensive (average of £802). 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

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Alternative routes for San Francisco to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Belfast Intl flights
Los Angeles to Belfast City flights
San Francisco to Belfast Intl flights
San Francisco to Belfast City flights

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 Belfast?

Deals for San Francisco to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Francisco to Belfast.

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

Yes, we can. To see specific flights from San Francisco to Belfast with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from San Francisco to Belfast 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.

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