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Cheap flights from Belfast Intl Airport to San Francisco from £508

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
21 Jul — 28 Jul1
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 21 June 2026.

Sun 13/907:00
BFS
-
SFO
3 stops39h 05m
Multiple Airlines
Sat 19/917:40
SFO
-
BFS
2 stops19h 00m
Multiple Airlines
Deal found 16/6£723
Sun 6/1206:30
BFS
-
SFO
1 stop21h 40m
Multiple Airlines
Fri 11/1217:20
SFO
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 18/6£828
Sun 25/1007:30
BFS
-
SFO
3 stops39h 15m
Multiple Airlines
Mon 26/1020:25
SFO
-
BFS
2 stops17h 45m
Multiple Airlines
Deal found 20/6£911
Wed 8/722:45
BFS
-
SFO
2 stops24h 42m
Multiple Airlines
Mon 13/711:10
SFO
-
BFS
2 stops21h 15m
Multiple Airlines
Deal found 18/6£1,004
Sun 12/707:00
BFS
-
SFO
2 stops37h 50m
Multiple Airlines
Fri 17/707:00
SFO
-
BFS
2 stops24h 55m
Multiple Airlines
Deal found 20/6£1,041
Fri 17/705:40
BFS
-
SFO
3 stops37h 05m
Multiple Airlines
Fri 24/708:10
SFO
-
BFS
3 stops29h 05m
Multiple Airlines
Deal found 19/6£1,058

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 21 June 2026.

Round-trip from

£723

One-way from

£508

Popular in

March

Cheapest in

May

Average price

£587
13/9-19/9
  • 13/9-19/9
  • 5 total stops
  • 58h 05m total
  • Belfast to San Francisco
Search Deals
21/7
  • 21/7
  • 3 total stops
  • 40h 15m total
  • Belfast to San Francisco
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£118 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 June 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 21 June 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

Sun 13/9

07:00-14:05

3 stops39h 05m

San Francisco

Sat 19/9

17:40-20:40

2 stops19h 00m

£723
Fastest return journey

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 6/12

06:30-20:10

1 stop21h 40m

San Francisco

Fri 11/12

17:20-22:20

2 stops21h 00m

£828

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 25/10

07:30-15:45

3 stops39h 15m

San Francisco

Mon 26/10

20:25-21:10

2 stops17h 45m

£911

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 17/7

05:40-10:45

3 stops37h 05m

San Francisco

Fri 24/7

08:10-21:15

3 stops29h 05m

£1,058

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 12/7

07:00-21:25

1 stop22h 25m

San Francisco

Fri 17/7

07:00-15:55

2 stops24h 55m

£1,127
Cheapest one-way

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 21/7

08:25-16:40

3 stops40h 15m

£508
Fastest single journey

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 25/7

06:55-08:48

3 stops33h 53m

£569

Flights are sorted by cheapest return flights first.

Deals found on 20/6

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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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.

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