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>

$541 CHEAP FLIGHTS from Northern Ireland to San Francisco

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

...and more

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41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$630

Multiple Airlines

Tue 2/24Tue 3/3

BFS - SFO • 2 stops

Cheapest one-way

$541

American Airlines

Mon 3/16

BHD - SFO • 1 stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to San Francisco!

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

Tue, Feb 24 - Tue, Mar 3

2:15 pm - 4:30 pm

BFS

SFO

34h 15m

2 stops

7:25 pm - 9:50 pm

SFO

BFS

18h 25m

2 stops

$630Multiple Airlines

Tue, Feb 24 - Tue, Mar 3

5:45 am - 2:30 pm

BFS

SFO

40h 45m

3 stops

3:40 pm - 10:35 pm

SFO

BFS

22h 55m

2 stops

$665Multiple Airlines

Sun, Feb 8 - Mon, Feb 16

5:45 am - 2:35 pm

BFS

SFO

40h 50m

3 stops

3:40 pm - 10:35 pm

SFO

BFS

22h 55m

2 stops

$679Multiple Airlines

Fri, Mar 13 - Mon, Mar 16

7:35 pm - 4:00 pm

BHD

SFO

27h 25m

1 stop

2:33 pm - 4:05 pm

SFO

BHD

18h 32m

2 stops

$683British Airways

Fri, Mar 13 - Mon, Mar 16

2:50 pm - 4:00 pm

BHD

SFO

32h 10m

1 stop

3:13 pm - 2:15 pm

SFO

BHD

16h 02m

2 stops

$684British Airways

Fri, Mar 13 - Mon, Mar 16

6:45 am - 8:47 pm

BHD

SFO

21h 02m

2 stops

10:36 am - 2:15 pm

SFO

BHD

20h 39m

2 stops

$689British Airways

Fri, Mar 13 - Mon, Mar 16

6:45 am - 8:47 pm

BHD

SFO

21h 02m

2 stops

3:13 pm - 6:35 pm

SFO

BHD

20h 22m

2 stops

$690British Airways

Fri, Jan 23 - Tue, Jan 27

7:35 pm - 3:00 pm

BHD

SFO

27h 25m

1 stop

6:37 am - 11:30 am

SFO

BHD

20h 53m

2 stops

$692British Airways

Fri, Jan 23 - Tue, Jan 27

6:45 am - 8:48 pm

BHD

SFO

22h 03m

2 stops

6:37 am - 10:30 am

SFO

BHD

19h 53m

2 stops

$697British Airways

Fri, Jan 23 - Tue, Jan 27

6:45 am - 3:35 pm

BHD

SFO

16h 50m

2 stops

6:37 am - 11:30 am

SFO

BHD

20h 53m

2 stops

$698British Airways

Useful Info

High season	August
Cheapest flight	$541

Most popular time to fly and prices are also 8% 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

Rohnert Park

Marina

Capitola

Emeryville

Pacifica

Millbrae

Campbell

Mill Valley

Newark

Novato

Windsor

Union City

Belmont

Richmond

West Sacramento

Los Altos

Corte Madera

American Canyon

Jenner

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)

$435 Find Cheap Flights from Northern Ireland to San Francisco

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

Everything you should know

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