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Cheap flights from Belfast Intl Airport to San Francisco from £317

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
4 Aug — 11 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to San Francisco
Explore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 July 2026.

Thu 20/821:10
BFS
-
SFO
2 stops27h 05m
Multiple Airlines
Mon 24/819:35
SFO
-
BFS
2 stops18h 50m
Multiple Airlines
Deal found 30/6£698
Thu 27/822:45
BFS
-
SFO
2 stops25h 05m
Multiple Airlines
Thu 3/917:35
SFO
-
BFS
2 stops17h 55m
Multiple Airlines
Deal found 4/7£727
Sat 24/1021:40
BFS
-
SFO
2 stops26h 55m
Multiple Airlines
Sat 31/1018:20
SFO
-
BFS
2 stops20h 15m
Multiple Airlines
Deal found 1/7£764
Fri 10/711:25
BFS
-
SFO
1 stop34h 25m
Multiple Airlines
Mon 27/720:30
SFO
-
BFS
2 stops26h 35m
Multiple Airlines
Deal found 5/7£823
Sun 25/1007:45
BFS
-
SFO
2 stops15h 50m
Multiple Airlines
Mon 26/1008:25
SFO
-
BFS
3 stops30h 55m
Multiple Airlines
Deal found 4/7£830
Tue 28/705:55
BFS
-
SFO
3 stops36h 50m
Multiple Airlines
Tue 4/808:30
SFO
-
BFS
2 stops27h 20m
Multiple Airlines
Deal found 30/6£831
Fri 10/711:25
BFS
-
SFO
1 stop34h 25m
Multiple Airlines
Thu 23/716:05
SFO
-
BFS
2 stops22h 45m
Multiple Airlines
Deal found 5/7£846
Fri 10/711:25
BFS
-
SFO
1 stop34h 25m
Multiple Airlines
Sun 26/717:40
SFO
-
BFS
2 stops19h 50m
Multiple Airlines
Deal found 5/7£876

Find flight deals from Belfast Intl to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to San Francisco (SFO). 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 5 July 2026.

Round-trip from

£727

One-way from

£317

Popular in

March

Cheapest in

May

Average price

£826
27/8-3/9
  • 27/8-3/9
  • 4 total stops
  • 43h 00m total
  • Belfast to San Francisco
Search Deals
24/8
  • 24/8
  • 3 total stops
  • 48h 40m total
  • Belfast to San Francisco
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£116 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£43 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to San Francisco 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 5 July 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 24/10

21:40-16:35

2 stops26h 55m

San Francisco

Sat 31/10

18:20-21:35

2 stops20h 15m

£764
Fastest return journey

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 27/8

20:40-15:50

2 stops27h 10m

San Francisco

Thu 3/9

23:15-23:00

1 stop15h 45m

£786

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 25/10

07:45-16:35

2 stops15h 50m

San Francisco

Mon 26/10

08:25-22:20

3 stops30h 55m

£830

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 20/8

21:35-11:45

2 stops22h 10m

San Francisco

Mon 24/8

06:00-16:25

3 stops26h 25m

£831

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 28/7

05:55-10:45

3 stops36h 50m

San Francisco

Tue 4/8

08:30-19:50

2 stops27h 20m

£831

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 13/8

21:05-12:00

3 stops46h 55m

San Francisco

Tue 18/8

08:30-15:15

2 stops22h 45m

£930

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 14/8

07:05-12:00

3 stops36h 55m

San Francisco

Sat 22/8

08:30-18:55

2 stops26h 25m

£1,012
Cheapest one-way

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 24/8

21:55-14:35

3 stops48h 40m

£317

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 7/9

18:50-14:35

3 stops51h 45m

£321
Fastest single journey

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 6/9

12:20-14:05

3 stops33h 45m

£389

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Sorted by cheapest first

Best time to book a flight from Belfast Intl to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to San Francisco. 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 into for flights to San Francisco from Belfast Intl?

    If you book a flight to San Francisco from Belfast Intl, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.0 mi from the center of San Francisco. There are 0 flights from Belfast Intl to San Francisco per day from 0 different airlines.

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

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

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

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

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

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

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
San Bruno
Newark
Bodega Bay
South San Francisco
Sunnyvale

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Belfast Intl to San Francisco flexibly with Cheapflights today.

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

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