Cheap flights from Northern Ireland to San Francisco from £320

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Northern Ireland to San Francisco

Keep the following information in mind while searching for Northern Ireland to San Francisco flight deals. Data was last updated 17 September 2025.

Round-trip from

£469

One-way from

£320

Popular in

July

Cheapest in

September

Average price

£404
American Airlines
  • American Airlines
  • 5/3-9/3
  • 3 total stops
  • 33h 08m total
  • Northern Ireland to San Francisco
2/10
  • 2/10
  • 3 total stops
  • 33h 19m total
  • Northern Ireland to San Francisco
Highest demand for flights based on searches. 11% potential increase in price (£50 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Northern Ireland to San Francisco

Cheapest flights from Northern Ireland to San Francisco
Explore the most affordable flight options available from Northern Ireland to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Thu 9/1006:30BHD - SFO
2 stops19h 15mDelta
Thu 16/1013:45SFO - BHD
2 stops23h 30mDelta
Deal found 16/9£486
Fri 31/1008:05BFS - SFO
2 stops35h 45mMultiple Airlines
Fri 7/1115:40SFO - BFS
2 stops22h 20mMultiple Airlines
Deal found 16/9£565
Thu 9/1006:35BHD - SFO
1 stop15h 15mMultiple Airlines
Thu 16/1016:30SFO - BHD
1 stop15h 00mMultiple Airlines
Deal found 16/9£605
Sat 27/906:30BHD - SFO
1 stop13h 15mKLM
Fri 3/1013:45SFO - BHD
1 stop23h 30mKLM
Deal found 16/9£771
Sat 27/906:30BHD - SFO
1 stop13h 15mDelta
Fri 3/1012:40SFO - BHD
2 stops20h 15mDelta
Deal found 16/9£776
Sat 27/905:45BFS - SFO
3 stops35h 45mMultiple Airlines
Fri 3/1010:15SFO - BFS
3 stops25h 50mMultiple Airlines
Deal found 16/9£867
Sat 27/906:55BHD - SFO
3 stops34h 35mMultiple Airlines
Fri 3/1012:50SFO - BHD
2 stops23h 20mMultiple Airlines
Deal found 16/9£900

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland 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 17 September 2025.
Use the filters below to find and compare flights from Northern Ireland to San Francisco that are best for you.

Fly from

Northern Ireland

Fly to

San Francisco

Route

Depart

Return

Price

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 5/3

10:40-18:45

1 stop16h 05m

San Francisco

Mon 9/3

10:37-10:40

2 stops17h 03m

£469

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 9/10

06:30-17:45

2 stops19h 15m

San Francisco

Thu 16/10

13:45-21:15

2 stops23h 30m

£486

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 31/10

08:05-12:50

2 stops35h 45m

San Francisco

Fri 7/11

15:40-22:00

2 stops22h 20m

£565

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 9/10

06:35-13:50

1 stop15h 15m

San Francisco

Thu 16/10

16:30-15:30

1 stop15h 00m

£605

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 27/9

05:45-09:30

3 stops35h 45m

San Francisco

Fri 3/10

10:15-20:05

3 stops25h 50m

£867

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 2/10

20:05-21:24

3 stops33h 19m

£320

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Fri 3/10

07:05-21:24

3 stops22h 19m

£348

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 3/10

07:00-13:15

3 stops38h 15m

£434

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Fri 3/10

06:35-13:50

1 stop15h 15m

£546

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 2/10

06:35-13:50

1 stop15h 15m

£590

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 12 results
1
2

Best time to book a flight from Northern Ireland to San Francisco

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

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

Find hourly flight availability from Northern Ireland 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 17 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to San Francisco as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland 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 Northern Ireland?

    For a flight from Northern Ireland to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city.

  • How long is the flight from Northern Ireland to San Francisco?

    Airlines like American Airlines fly from Northern Ireland to San Francisco in about 16h 05m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 5038 mi.

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

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

  • How can I find direct flights from Northern Ireland to San Francisco?

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

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

    Yes. Cheapflights offers flight deals from Northern Ireland 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 Northern Ireland to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from Northern Ireland to San Francisco (average of £538). Flying from Northern Ireland 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 San Francisco?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Northern Ireland to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Northern Ireland to San Francisco

Discover the top 2 airlines that operate flights from Northern Ireland 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£400Average£562FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£465Average£515FlexibilityNo 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 Northern Ireland to San Francisco?

When you search for this flight from Northern Ireland to San Francisco, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from Northern Ireland.

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

Certainly. Search results for flights to San Francisco from Northern Ireland 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 Northern Ireland to San Francisco become cheaper?

Yes, Cheapflights offers price alerts on Northern Ireland to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.