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Cheap flights from Belfast to San Francisco from £612

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SFO
9 Jul — 16 Jul1
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 9 June 2026.

Tue 7/717:30
BHD
-
SFO
2 stops34h 36m
KLM
Tue 14/707:00
SFO
-
BHD
2 stops18h 20m
KLM
Deal found 9/6£612
Mon 6/709:50
BHD
-
SFO
2 stops22h 43m
Delta
Mon 13/706:00
SFO
-
BHD
2 stops19h 20m
Delta
Deal found 8/6£682
Sat 4/706:20
BFS
-
SFO
2 stops37h 01m
Multiple Airlines
Sat 11/719:50
SFO
-
BFS
1 stop19h 35m
Multiple Airlines
Deal found 6/6£699
Thu 16/709:35
BHD
-
SFO
2 stops21h 35m
Multiple Airlines
Mon 20/716:35
SFO
-
BHD
1 stop16h 55m
Multiple Airlines
Deal found 7/6£702
Fri 3/717:30
BHD
-
SFO
2 stops30h 54m
KLM
Fri 10/713:45
SFO
-
BHD
1 stop35h 35m
KLM
Deal found 5/6£728
Sun 5/718:30
BHD
-
SFO
2 stops48h 51m
Multiple Airlines
Sun 12/708:10
SFO
-
BHD
2 stops22h 50m
Multiple Airlines
Deal found 6/6£744
Tue 21/709:40
BHD
-
SFO
2 stops20h 48m
British Airways
Wed 5/816:35
SFO
-
BHD
1 stop15h 05m
British Airways
Deal found 7/6£747
Thu 16/709:50
BHD
-
SFO
2 stops22h 43m
Delta
Mon 20/723:56
SFO
-
BHD
2 stops25h 24m
Delta
Deal found 7/6£747
Sun 5/709:50
BHD
-
SFO
1 stop33h 55m
KLM
Sun 12/713:45
SFO
-
BHD
1 stop35h 35m
KLM
Deal found 6/6£749
Wed 22/705:55
BFS
-
SFO
2 stops17h 32m
Multiple Airlines
Wed 29/711:10
SFO
-
BFS
2 stops24h 05m
Multiple Airlines
Deal found 8/6£771
Wed 5/807:35
BFS
-
SFO
3 stops46h 20m
Multiple Airlines
Sat 15/808:30
SFO
-
BFS
2 stops29h 00m
Multiple Airlines
Deal found 8/6£780
Thu 16/708:20
BFS
-
SFO
2 stops36h 00m
Multiple Airlines
Mon 20/723:15
SFO
-
BFS
1 stop16h 05m
Multiple Airlines
Deal found 7/6£830

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 9 June 2026.

Round-trip from

£612

Popular in

March

Cheapest in

May

Average price

£650
KLM
  • KLM
  • 7/7-14/7
  • 4 total stops
  • 52h 56m total
  • Belfast to San Francisco
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£113 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% 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 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 9 June 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

Tue 7/7

17:30-20:06

2 stops34h 36m

San Francisco

Tue 14/7

07:00-09:20

2 stops18h 20m

£612
Fastest return journey

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 16/7

09:35-23:10

2 stops21h 35m

San Francisco

Mon 20/7

16:35-17:30

1 stop16h 55m

£702

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 3/7

17:30-16:24

2 stops30h 54m

San Francisco

Fri 10/7

13:45-09:20

1 stop35h 35m

£728

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sun 5/7

18:30-11:21

2 stops48h 51m

San Francisco

Sun 12/7

08:10-15:00

2 stops22h 50m

£744

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 16/7

09:50-00:33

2 stops22h 43m

San Francisco

Mon 20/7

23:56-09:20

2 stops25h 24m

£747

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sun 5/7

09:50-11:45

1 stop33h 55m

San Francisco

Sun 12/7

13:45-09:20

1 stop35h 35m

£749

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sun 5/7

17:30-11:45

1 stop26h 15m

San Francisco

Sun 12/7

06:00-09:20

2 stops19h 20m

£765

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 3/7

17:30-11:45

1 stop26h 15m

San Francisco

Fri 10/7

13:45-16:55

1 stop19h 10m

£771

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Wed 22/7

05:55-15:27

2 stops17h 32m

San Francisco

Wed 29/7

11:10-19:15

2 stops24h 05m

£771

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Sat 4/7

07:00-11:21

2 stops36h 21m

San Francisco

Sat 11/7

08:30-14:40

2 stops22h 10m

£779

Flights are sorted by cheapest return flights first.

Deals found on 5/6

Showing 1-10 of 17 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 9 June 2026.
Read through reviews of airlines operating flights from Belfast to San Francisco, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,031 reviews
Check prices

Crew

7.7

Entertainment

6.4

Comfort

6.8

Boarding

6.9

Overall

6.7

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
8,031 reviews
British Airways
6.7
Okay
8,031 reviews
Check prices

Crew

7.7

Entertainment

6.4

Comfort

6.8

Boarding

6.9

Overall

6.7

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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 1 airline.

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

    There are many flights that can get you from Belfast to San Francisco in 34h 36m. Fly via KLM to get the fastest option. Belfast and San Francisco are separated by a distance of 5038 mi.

  • What is the cheapest airline to fly from Belfast to San Francisco round-trip?

    Flying on British Airways is currently your cheapest option to San Francisco, with prices starting at £508. British Airways is currently priced 33% 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 airline flying from Belfast to San Francisco

Discover the top airline 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£508Average£643FlexibilityNo cancel feeOn-time70%
Search British Airways 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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