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>

$647 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

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

Sat, Nov 8 - Sat, Nov 15

7:45 pm - 2:35 pmBFS-SFO

50h 50m2 stops

4:40 pm - 8:20 amSFO-BFS

31h 40m2 stops

$647Multiple Airlines

Find Deal

Sat, Nov 8 - Sat, Nov 15

11:10 pm - 2:35 pmBFS-SFO

47h 25m3 stops

4:35 pm - 11:50 pmSFO-BFS

23h 15m2 stops

$726Multiple Airlines

Find Deal

Wed, Mar 4 - Sun, Mar 8

12:25 pm - 6:45 pmBHD-SFO

14h 20m1 stop

1:25 pm - 1:55 pmSFO-BHD

17h 30m2 stops

$781American Airlines

Find Deal

Wed, Mar 4 - Sun, Mar 8

6:35 am - 3:00 pmBHD-SFO

16h 25m1 stop

1:25 pm - 1:55 pmSFO-BHD

17h 30m2 stops

$783American Airlines

Find Deal

Wed, Mar 4 - Sun, Mar 8

11:25 am - 11:59 pmBHD-SFO

20h 34m2 stops

1:25 pm - 1:55 pmSFO-BHD

17h 30m2 stops

$786American Airlines

Find Deal

Wed, Mar 4 - Sun, Mar 8

9:15 am - 11:28 pmBHD-SFO

22h 13m2 stops

1:25 pm - 1:55 pmSFO-BHD

17h 30m2 stops

$789American Airlines

Find Deal

Thu, Mar 5 - Mon, Mar 9

6:35 am - 3:00 pmBHD-SFO

16h 25m1 stop

9:32 am - 10:40 amSFO-BHD

18h 08m2 stops

$801American Airlines

Find Deal

Thu, Mar 5 - Mon, Mar 9

11:05 am - 10:28 pmBHD-SFO

19h 23m2 stops

6:09 pm - 6:35 pmSFO-BHD

17h 26m2 stops

$813British Airways

Find Deal

Sat, Nov 8 - Sat, Nov 15

6:30 am - 11:50 amBHD-SFO

13h 20m1 stop

10:30 am - 4:50 pmSFO-BHD

22h 20m2 stops

$837Delta

Find Deal

Sat, Nov 8 - Sat, Nov 15

11:35 am - 11:59 pmBHD-SFO

20h 24m2 stops

10:16 am - 2:15 pmSFO-BHD

19h 59m2 stops

$839Finnair

Find Deal

Cheapest round-trip

$647

Multiple Airlines

Sat 11/8Sat 11/15

BFS - SFO • 2 stops

Cheapest one-way

$1,761

Multiple Airlines

Tue 1/6

BHD - SFO • 3 stops

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!

Useful Info

High season	August
Cheapest flight	$647

Most popular time to fly and prices are also 4% 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

Capitola

Pacifica

Emeryville

Rohnert Park

Millbrae

Campbell

Mill Valley

Newark

Novato

Windsor

Belmont

Richmond

West Sacramento

Union City

Los Altos

Corte Madera

Jenner

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)

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$647 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

Everything you should know

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