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Cheap flights from San Francisco to Northern Ireland from £290

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
15 Sep — 22 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Northern Ireland
Explore the most affordable flight options available from San Francisco to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2026.

Sun 15/1120:35 -
1 stop15h 35m
Thu 19/1108:50 -
1 stop14h 05m
Deal found 11/8£653
Mon 5/1019:30 -
1 stop17h 05m
Mon 19/1009:40 -
1 stop36h 10m
Deal found 15/8£674
Mon 5/1006:35 -
2 stops18h 45m
Mon 19/1017:30 -
1 stop26h 15m
Deal found 15/8£680
Thu 12/1120:35 -
1 stop15h 45m
Sat 21/1118:15 -
1 stop28h 40m
Deal found 12/8£698
Mon 5/1008:10 -
3 stops27h 10m
Mon 19/1015:05 -
2 stops32h 50m
Deal found 15/8£703
Mon 5/1010:33 -
2 stops18h 22m
Mon 19/1011:35 -
2 stops20h 02m
Deal found 15/8£708
Mon 5/1016:45 -
2 stops20h 20m
Mon 19/1011:05 -
3 stops35h 35m
Deal found 15/8£761
Sun 15/1120:35 -
1 stop15h 35m
Wed 18/1106:35 -
2 stops17h 00m
Deal found 11/8£799
Tue 22/900:05 -
2 stops31h 50m
Wed 30/905:55 -
2 stops23h 04m
Deal found 12/8£824
Sun 27/906:00 -
3 stops30h 15m
Sun 4/1014:40 -
2 stops33h 35m
Deal found 13/8£866
Thu 12/1119:25 -
2 stops18h 30m
Sat 21/1123:00 -
3 stops47h 45m
Deal found 12/8£885
Fri 28/808:10 -
2 stops24h 20m
Sat 5/921:40 -
3 stops47h 10m
Deal found 11/8£918

Find flight deals from San Francisco to Northern Ireland

Keep the following information in mind while searching for San Francisco to Northern Ireland flight deals. Data was last updated 16 August 2026.

Round-trip from

£646

One-way from

£290
British Airways
  • British Airways
  • 15/11-19/11
  • 2 total stops
  • 32h 00m total
  • San Francisco to Northern Ireland
Search Deals
5/10
  • 5/10
  • 3 total stops
  • 39h 22m total
  • San Francisco to Northern Ireland
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Northern Ireland 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 16 August 2026.
Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Sun 15/11

17:25-18:50

1 stop17h 25m

Belfast City

Wed 18/11

12:20-18:45

1 stop14h 25m

£653

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Sun 15/11

20:35-20:10

1 stop15h 35m

Belfast City

Thu 19/11

06:30-14:55

1 stop16h 25m

£653

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Mon 5/10

06:35-09:20

2 stops18h 45m

Belfast City

Mon 19/10

17:30-11:45

1 stop26h 15m

£680

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 5/10

08:10-19:20

3 stops27h 10m

Belfast Intl

Mon 19/10

15:05-15:55

2 stops32h 50m

£703

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Tue 22/9

00:05-15:55

2 stops31h 50m

Belfast Intl

Wed 30/9

05:55-20:59

2 stops23h 04m

£824

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sun 27/9

06:00-20:15

3 stops30h 15m

Belfast Intl

Sun 4/10

14:40-16:15

2 stops33h 35m

£866

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Fri 28/8

08:10-16:30

2 stops24h 20m

Belfast Intl

Sat 5/9

21:40-12:50

3 stops47h 10m

£918

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Thu 3/9

08:30-19:30

2 stops27h 00m

Belfast Intl

Thu 10/9

06:10-12:15

3 stops38h 05m

£933

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sat 21/11

17:20-20:10

2 stops18h 50m

Belfast Intl

Sat 28/11

23:00-14:45

3 stops47h 45m

£1,022
Cheapest one-way

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Mon 5/10

21:05-14:15

3 stops33h 10m

£296

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 16 resultsSorted by cheapest first
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Best time to book a flight from San Francisco to Northern Ireland

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

No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Northern Ireland. 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 Northern Ireland?

    San Francisco (SFO), located 11.0 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Northern Ireland.

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

    For as low as £653, British Airways can have you in Northern Ireland from San Francisco in 17h 25m. The distance between San Francisco and Northern Ireland is about 5038 mi.

  • What are the most popular routes from San Francisco to Northern Ireland?

    When deciding which route to take from San Francisco to Northern Ireland consider San Francisco - Belfast Intl, San Francisco - Belfast City or San Francisco - Campbeltown Machrihanish as they are the most popular.

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

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

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

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

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

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

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

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

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Northern Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to Northern Ireland from San Francisco? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from San Francisco to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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