How does KAYAK find such low prices on flights from Northern Ireland to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to San Francisco. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Northern Ireland to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Northern Ireland with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$434 CHEAP FLIGHTS from Northern Ireland to San Francisco

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Flight Deals

Cheap Flights from Northern Ireland to San Francisco

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Northern Ireland to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Northern Ireland to San Francisco

Sun, Sep 14 - Mon, Sep 22

5:25 pm - 11:45 amBHD-SFO

26h 20m1 stop

1:45 pm - 4:55 pmSFO-BHD

19h 10m2 stops

$767KLM

Find Deal

Mon, Sep 29 - Mon, Oct 6

10:10 am - 1:35 pmBFS-SFO

35h 25m3 stops

4:20 pm - 8:55 pmSFO-BFS

20h 35m2 stops

$818

Find Deal

Sun, Sep 14 - Mon, Sep 22

1:00 pm - 12:15 amBHD-SFO

19h 15m2 stops

1:21 pm - 5:30 pmSFO-BHD

20h 09m2 stops

$831American Airlines

Find Deal

Fri, Oct 24 - Mon, Nov 3

6:30 am - 11:45 amBHD-SFO

13h 15m1 stop

1:55 pm - 9:00 pmSFO-BHD

23h 05m1 stop

$833KLM

Find Deal

Mon, Sep 29 - Mon, Oct 6

10:10 am - 1:35 pmBFS-SFO

35h 25m2 stops

4:20 pm - 8:55 pmSFO-BFS

20h 35m2 stops

$837

Find Deal

Fri, Oct 24 - Mon, Nov 3

6:30 am - 5:24 pmBHD-SFO

18h 54m2 stops

1:55 pm - 9:00 pmSFO-BHD

23h 05m1 stop

$844KLM

Find Deal

Fri, Oct 24 - Sun, Nov 2

6:35 am - 1:50 pmBHD-SFO

15h 15m1 stop

11:59 pm - 2:15 pmSFO-BHD

30h 16m2 stops

$847British Airways

Find Deal

Mon, Sep 29 - Mon, Oct 6

10:10 am - 1:35 pmBFS-SFO

35h 25m3 stops

4:20 pm - 11:00 pmSFO-BFS

22h 40m3 stops

$853

Find Deal

Fri, Oct 24 - Mon, Nov 3

6:35 am - 5:59 pmBHD-SFO

19h 24m2 stops

12:11 pm - 2:15 pmSFO-BHD

18h 04m2 stops

$862British Airways

Find Deal

Fri, Oct 24 - Fri, Oct 31

6:30 am - 11:45 amBHD-SFO

13h 15m1 stop

10:40 am - 4:50 pmSFO-BHD

23h 10m2 stops

$903Delta

Find Deal

Useful Info

Low season	September
High season	August
Cheapest flight	$434

Best time to beat the crowds with an average 20% drop in price.

Most popular time to fly and prices are also 6% lower on average.

Flight from Belfast City Airport to San Francisco

How does KAYAK find such low prices on flights from Northern Ireland to San Francisco?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to San Francisco.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to San Francisco?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Northern Ireland to San Francisco?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Northern Ireland with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to San Francisco?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Calistoga

Marina

Pacifica

Capitola

Emeryville

Rohnert Park

Millbrae

Campbell

Mill Valley

Newark

Novato

Windsor

Los Altos

Belmont

Richmond

Union City

West Sacramento

Jenner

Corte Madera

American Canyon

Everything you need to know for your flight to San Francisco

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in San Francisco

San Francisco (SFO)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

$434 Find Cheap Flights from Northern Ireland to San Francisco

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

Cheap Flights from Northern Ireland to San Francisco

Recent round-trip flight deals from Northern Ireland to San Francisco

Recent one-way flight deals from Northern Ireland to San Francisco

Recent last minute flight deals from Northern Ireland to San Francisco

Good to know

FAQs for booking flights from Northern Ireland to San Francisco

How does KAYAK find such low prices on flights from Northern Ireland to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to San Francisco.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Northern Ireland to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Northern Ireland with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Francisco?

Everything you need to know for your flight to San Francisco

Information on the airport you'll fly into in San Francisco

Cabin class types available on flights to Northern Ireland

Complete your trip to San Francisco with a hotel stay or car rental

Find direct flights for San Francisco

Flights to other popular destinations

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight