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Cheap flights from Belfast to San Francisco from £314

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SFO
25 Apr — 2 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to San Francisco
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2026.

Thu 10/919:30
BHD
-
SFO
1 stop26h 20m
British Airways
Mon 14/916:35
SFO
-
BHD
1 stop14h 55m
British Airways
Deal found 25/3£639
Thu 24/920:35
BHD
-
SFO
1 stop25h 15m
British Airways
Mon 28/916:35
SFO
-
BHD
1 stop16h 55m
British Airways
Deal found 23/3£650
Thu 3/920:35
BHD
-
SFO
1 stop25h 15m
British Airways
Mon 7/906:30
SFO
-
BHD
2 stops28h 15m
British Airways
Deal found 25/3£656
Sun 19/417:30
BHD
-
SFO
1 stop26h 15m
Multiple Airlines
Sun 26/413:45
SFO
-
BHD
1 stop19h 10m
Multiple Airlines
Deal found 22/3£665
Sun 19/417:30
BHD
-
SFO
1 stop26h 15m
KLM
Sun 26/406:20
SFO
-
BHD
2 stops19h 00m
KLM
Deal found 22/3£668
Sun 19/406:10
BFS
-
SFO
1 stop19h 45m
Multiple Airlines
Sun 26/419:40
SFO
-
BFS
2 stops30h 15m
Multiple Airlines
Deal found 22/3£764
Sat 9/521:40
BFS
-
SFO
3 stops32h 15m
Multiple Airlines
Sat 16/508:30
SFO
-
BFS
2 stops16h 25m
Multiple Airlines
Deal found 25/3£829

Find flight deals from Belfast to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) 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 26 March 2026.

Round-trip from

£639

One-way from

£314

Popular in

March

Cheapest in

September

Average price

£1,046
British Airways
  • British Airways
  • 10/9-14/9
  • 2 total stops
  • 41h 15m total
  • Belfast to San Francisco
Search Deals
19/4
  • 19/4
  • 3 total stops
  • 46h 00m total
  • Belfast to San Francisco
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£77 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast 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 26 March 2026.
Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 10/9

19:30-13:50

1 stop26h 20m

San Francisco

Mon 14/9

16:35-15:30

1 stop14h 55m

£639

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 3/9

19:30-13:50

1 stop26h 20m

San Francisco

Mon 7/9

16:35-09:00

1 stop32h 25m

£659

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 19/4

17:05-14:40

2 stops29h 35m

San Francisco

Sun 26/4

16:45-21:30

2 stops20h 45m

£766

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 9/5

06:20-16:15

2 stops17h 55m

San Francisco

Sat 16/5

19:35-22:40

2 stops19h 05m

£837
Fastest return journey

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 5/5

12:40-23:59

2 stops19h 19m

San Francisco

Tue 19/5

13:40-15:20

2 stops17h 40m

£1,748
Cheapest one-way

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 19/4

22:10-12:10

3 stops46h 00m

£314

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sun 5/7

22:10-15:55

3 stops49h 45m

£523

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sun 5/7

13:10-09:21

2 stops28h 11m

£548

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sun 5/7

06:50-10:50

3 stops36h 00m

£644
Fastest single journey

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Tue 31/3

06:30-13:50

1 stop15h 20m

£984

Flights are sorted by cheapest return flights first.

Deals found on 22/3

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Belfast to San Francisco

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

How much does it cost for a return flight from Belfast to San Francisco?

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 26 March 2026.
Read through reviews of airlines operating flights from Belfast to San Francisco, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,496 reviews
Check prices

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,496 reviews
American Airlines
7.1
Good
11,496 reviews
Check prices

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
British Airways
6.7
Okay
7,820 reviews
American Airlines
7.1
Good
11,496 reviews
Check prices

Crew

7.9

Food

6.4

Overall

7.1

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

Find useful and relevant information for your journey from Belfast 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?

    Located just 11.0 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from Belfast. Booking flights from Belfast to San Francisco (SFO) should be relatively easy as there are 0 daily inbound flights from Belfast from 2 different airlines.

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

    There are many flights that can get you from Belfast to San Francisco in 26h 20m. Fly via British Airways to get the fastest option. Belfast and San Francisco are separated by a distance of 5038 mi.

  • What are the cheapest airlines flying from Belfast to San Francisco round-trip?

    Flying on British Airways is currently your cheapest option to San Francisco, with prices starting at £428. Another option worth looking into is American Airlines, starting at £473 return. British Airways is currently priced 39% below the average price you’ll pay for this route.

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast 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
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Belfast to San Francisco

Discover the top 2 airlines that operate flights from Belfast to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 March 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£428Average£610FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£473Average£524FlexibilityNo cancel feeOn-time71%
Search American Airlines 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 Belfast to San Francisco?

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 San Francisco from Belfast today with Cheapflights!

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

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 Belfast to San Francisco.

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

Certainly. Search results for flights to San Francisco from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Belfast today and book when prices fit your budget.

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