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Cheap flights from Belfast to San Francisco from £391

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SFO
7 Jul — 14 Jul1
1 adult

Cheap 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 2 July 2025.

Round-trip from

£391

Popular in

December

Cheapest in

April

Average price

£707
British Airways
  • British Airways
  • 20/11-25/11
  • 2 total stops
  • 34h 55m total
  • Belfast to San Francisco
Highest demand for flights based on searches. 4% potential increase in price (£18 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Belfast to San Francisco

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 2 July 2025.

Thu 20/1109:00BHD - SFO
1 stop17h 45mBritish Airways
Tue 25/1117:30SFO - BHD
1 stop17h 10mBritish Airways
Deal found 30/6£391
Mon 15/919:30BHD - SFO
2 stops31h 05mMultiple Airlines
Sun 21/922:43SFO - BHD
2 stops26h 07mMultiple Airlines
Deal found 30/6£470
Mon 10/1117:20BHD - SFO
2 stops37h 24mVirgin Atlantic
Sun 16/1115:00SFO - BHD
2 stops46h 00mVirgin Atlantic
Deal found 30/6£506
Thu 20/1106:00BFS - SFO
1 stop21h 30mMultiple Airlines
Tue 25/1116:05SFO - BFS
1 stop21h 25mMultiple Airlines
Deal found 30/6£513
Wed 20/806:30BHD - SFO
1 stop13h 15mDelta
Fri 5/913:20SFO - BHD
2 stops19h 35mDelta
Deal found 1/7£567
Thu 14/817:25BHD - SFO
1 stop26h 20mKLM
Thu 21/813:45SFO - BHD
1 stop19h 10mKLM
Deal found 1/7£816

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 2 July 2025.
Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.

Fly from

Belfast

Fly to

San Francisco

Route

Depart

Return

Price

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 20/11

09:00-18:45

1 stop17h 45m

San Francisco

Tue 25/11

17:30-18:40

1 stop17h 10m

£391

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 15/9

19:30-18:35

2 stops31h 05m

San Francisco

Sun 21/9

22:43-08:50

2 stops26h 07m

£470

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 10/11

17:20-22:44

2 stops37h 24m

San Francisco

Sun 16/11

15:00-21:00

2 stops46h 00m

£506

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 20/11

06:00-19:30

1 stop21h 30m

San Francisco

Tue 25/11

16:05-21:30

1 stop21h 25m

£513

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Wed 20/8

06:30-11:45

1 stop13h 15m

San Francisco

Fri 5/9

13:20-16:55

2 stops19h 35m

£567

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 14/8

17:25-11:45

1 stop26h 20m

San Francisco

Thu 21/8

13:45-16:55

1 stop19h 10m

£816

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Wed 13/8

05:45-21:25

3 stops23h 40m

£434

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 21/7

18:30-23:48

2 stops37h 18m

£899

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Mon 21/7

19:30-13:50

1 stop26h 20m

£1,115

Flights are sorted by cheapest return flights first.

Deals found on 29/6

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

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

Currently, February is the cheapest month in which you can book a flight from Belfast to San Francisco (average of £538). Flying from Belfast to San Francisco in July is currently the most expensive (average of £803). 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.

What is the cheapest time of day to fly from BFS to SFO?

Find hourly flight availability from Belfast to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 July 2025.

One of the essential ways to save on airfare from Belfast to San Francisco is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 10% on airfare.

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 2 July 2025.
Read through reviews of airlines operating flights from Belfast to San Francisco, such as Delta, KLM, andFinnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
8.0
Very Good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 11.8 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.

  • 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 £391. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Delta, with the lowest prices starting at £506 and £567, respectively. British Airways is currently priced 29% 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.

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

    Currently, February is the cheapest month in which you can book a flight from Belfast to San Francisco (average of £538). Flying from Belfast to San Francisco in July is currently the most expensive (average of £803). 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

Travelling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Santa Cruz
Vallejo
Newark
South San Francisco
Bodega Bay
Pacific Grove
Union City

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 2 July 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£397Average£566FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£461Average£511FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Belfast to San Francisco?

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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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