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>

$461 CHEAP FLIGHTS from Northern Ireland to San Francisco

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

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Flight Deals

Cheap Flights from Northern Ireland to San Francisco

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

Round-trip

One-way

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

Fri, Apr 24 - Tue, Apr 28

6:05 am - 10:49 pm

BFS

SFO

24h 44m

2 stops

6:00 am - 2:35 pm

SFO

BFS

24h 35m

2 stops

$879Multiple Airlines

Tue, May 12 - Tue, May 19

5:30 pm - 11:45 am

BHD

SFO

26h 15m

1 stop

6:00 am - 9:20 am

SFO

BHD

19h 20m

2 stops

$882KLM

Fri, Apr 24 - Tue, Apr 28

6:05 am - 9:20 pm

BFS

SFO

23h 15m

1 stop

5:55 pm - 11:20 pm

SFO

BFS

21h 25m

1 stop

$887Multiple Airlines

Tue, May 12 - Tue, May 19

9:50 am - 8:37 pm

BHD

SFO

18h 47m

2 stops

6:00 am - 9:20 am

SFO

BHD

19h 20m

2 stops

$891KLM

Wed, May 27 - Wed, Jun 3

6:00 am - 4:35 pm

BFS

SFO

42h 35m

3 stops

6:00 am - 7:15 pm

SFO

BFS

29h 15m

2 stops

$908Multiple Airlines

Sun, May 10 - Sun, May 17

7:00 am - 3:45 pm

BFS

SFO

16h 45m

1 stop

11:15 pm - 11:10 pm

SFO

BFS

15h 55m

1 stop

$923Multiple Airlines

Wed, May 27 - Wed, Jun 3

6:00 am - 4:35 pm

BFS

SFO

42h 35m

3 stops

6:00 am - 3:55 pm

SFO

BFS

25h 55m

3 stops

$924Multiple Airlines

Tue, May 12 - Tue, May 19

8:25 pm - 1:50 pm

BHD

SFO

25h 25m

1 stop

4:35 pm - 6:55 pm

SFO

BHD

18h 20m

1 stop

$947British Airways

Sun, May 10 - Sun, May 17

8:10 pm - 1:50 pm

BHD

SFO

25h 40m

1 stop

1:40 pm - 6:45 pm

SFO

BHD

21h 05m

2 stops

$953British Airways

Fri, Apr 24 - Tue, Apr 28

11:00 am - 5:40 pm

BHD

SFO

14h 40m

1 stop

7:30 pm - 7:40 pm

SFO

BHD

16h 10m

1 stop

$955British Airways

Useful Info

Low season	September
High season	August
Cheapest flight	$461

Best time to beat the crowds with an average 43% drop in price.

Most popular time to fly and prices are also 27% lower on average.

Flight from Belfast Intl 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

Rohnert Park

Emeryville

Pacifica

Capitola

Millbrae

Campbell

Newark

Mill Valley

Novato

Windsor

Union City

Belmont

West Sacramento

Richmond

American Canyon

Corte Madera

Los Altos

Jenner

Everything you need to know for your flight to San Francisco

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Direct Flights

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

San Francisco (SFO)

$461 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

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