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Cheap flights from San Francisco to Belfast Intl Airport from £514

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap flight deals from San Francisco to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Belfast Intl (BFS). 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 12 September 2025.

Round-trip from

£514

Popular in

January

Cheapest in

October

Average price

£653
9/10-16/10
  • 9/10-16/10
  • 3 total stops
  • 47h 45m total
  • San Francisco to Belfast
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£87 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from San Francisco to Belfast Intl

Cheapest flights from San Francisco to Belfast Intl
Explore the most affordable flight options available from San Francisco to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Thu 9/1012:35SFO - BFS
2 stops26h 50mMultiple Airlines
Thu 16/1006:35BFS - SFO
1 stop20h 55mMultiple Airlines
Deal found 11/9£514
Thu 16/1010:15SFO - BFS
3 stops19h 50mMultiple Airlines
Wed 22/1007:25BFS - SFO
3 stops39h 05mMultiple Airlines
Deal found 10/9£596
Mon 27/1020:25SFO - BFS
2 stops17h 45mMultiple Airlines
Mon 3/1114:15BFS - SFO
2 stops34h 15mMultiple Airlines
Deal found 12/9£612
Sun 21/917:40SFO - BFS
2 stops20h 40mMultiple Airlines
Wed 24/917:20BFS - SFO
2 stops29h 10mMultiple Airlines
Deal found 11/9£724
Wed 24/912:15SFO - BFS
2 stops19h 15mMultiple Airlines
Sun 5/1007:45BFS - SFO
3 stops45h 39mMultiple Airlines
Deal found 10/9£737

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Belfast Intl 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 12 September 2025.
Use the filters below to find and compare flights from San Francisco to Belfast Intl Airport that are best for you.

Fly from

San Francisco

Fly to

Belfast Intl

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 9/10

12:35-23:25

2 stops26h 50m

Belfast Intl

Thu 16/10

06:35-19:30

1 stop20h 55m

£514

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 16/10

10:15-14:05

3 stops19h 50m

Belfast Intl

Wed 22/10

07:25-14:30

3 stops39h 05m

£596

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 27/10

20:25-21:10

2 stops17h 45m

Belfast Intl

Mon 3/11

14:15-16:30

2 stops34h 15m

£612

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 24/9

12:15-15:30

2 stops19h 15m

Belfast Intl

Sun 5/10

07:45-21:24

3 stops45h 39m

£737

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Best time to book a flight from San Francisco to Belfast Intl

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

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of £67). Flying from San Francisco to Belfast Intl Airport in July is currently the most expensive (average of £90). 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.

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

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Belfast Intl. 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 from for flights from San Francisco to Belfast Intl?

    San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Belfast Intl. 0 airlines have flights from San Francisco to Belfast Intl on a regular basis. Booking flights from San Francisco to Belfast Intl should not be difficult; the airport handles an average of 0 outbound flights to Belfast Intl per day.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Belfast Intl 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 San Francisco to Belfast Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of £67). Flying from San Francisco to Belfast Intl Airport in July is currently the most expensive (average of £90). 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 Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

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Alternative routes for San Francisco to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
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San Francisco to Belfast City 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 San Francisco to Belfast Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco to Belfast Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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 Belfast Intl from San Francisco.

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

Certainly. Search results for flights to Belfast Intl from San Francisco 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 San Francisco to Belfast Intl become cheaper?

Not ready to book yet? You can track prices for flights from San Francisco to Belfast Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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