In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest time of day to fly from BFS to SFO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast Intl Airport to San Francisco as you normally would.

What airport do you fly into for flights to San Francisco from Belfast Intl?

If you book a flight to San Francisco from Belfast Intl, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco. There are 0 flights from Belfast Intl to San Francisco per day from 0 different airlines.

Can I find deals for flights from Belfast Intl to San Francisco that include hotel bookings?

Yes. In addition to deals on Belfast Intl to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Belfast Intl to San Francisco?

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

Can I find deals for business class flights from Belfast Intl to San Francisco?

Yes. Cheapflights offers flight deals from Belfast Intl to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$432+ Flights from Belfast Intl Airport to San Francisco

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Cheap flight deals from Belfast Intl to San Francisco

Cheapest

Best

Last-minute

One-way

Cheapest flights from Belfast Intl to San Francisco
Explore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

Sat 2/2811:10 pm

BFS

SFO

3 stops47h 25m

Multiple Airlines

Sat 3/73:05 pm

SFO

BFS

2 stops23h 15m

Multiple Airlines

Deal found 1/31

$834

Tue 3/176:30 am

BFS

SFO

2 stops17h 05m

Multiple Airlines

Tue 3/246:20 pm

SFO

BFS

2 stops14h 40m

Multiple Airlines

Deal found 1/31

$844

Find flight deals from Belfast Intl to San Francisco

Round-trip from	$834 (Mytrip)
One-way from	$432 (Kiwi.com)
Popular in	July
Cheapest in	January

From Belfast Intl to San Francisco

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One-way flight from Belfast Intl to San Francisco

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Highest demand for flights based on searches. 16% potential increase in price ($148 potential increase over avg. RT price).

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Cheapest flight prices on average. 8% potential price decrease ($62 potential savings vs. average RT price).

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Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Sat 2/28

11:10 pm-2:35 pm

3 stops47h 25m

San Francisco

Sat 3/7

3:05 pm-10:20 pm

2 stops23h 15m

$834

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 3/17

6:30 am-4:35 pm

2 stops17h 05m

San Francisco

Tue 3/24

6:20 pm-4:00 pm

2 stops14h 40m

$844

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 3/2

10:20 pm-2:30 pm

3 stops48h 10m

$432

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Wed 7/15

8:15 pm-3:50 pm

3 stops51h 35m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Best time to book a flight from Belfast Intl to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast Intl with our price prediction graph.

BFS-SFO

Estimated round-trip 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.

Related info for your journey

What airport do you fly into for flights to San Francisco from Belfast Intl?
If you book a flight to San Francisco from Belfast Intl, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco. There are 0 flights from Belfast Intl to San Francisco per day from 0 different airlines.
Can I find deals for flights from Belfast Intl to San Francisco that include hotel bookings?
Yes. In addition to deals on Belfast Intl to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Belfast Intl to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to San Francisco.
Can I find deals for business class flights from Belfast Intl to San Francisco?
Yes. Cheapflights offers flight deals from Belfast Intl to San Francisco 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

South San Francisco

Santa Cruz

Santa Clara

Roseville

Livermore

Watsonville

San Bruno

Daly City

Sunnyvale

Turlock

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San Carlos

San Ramon

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$432+ Cheap flights from Belfast Intl (BFS) to San Francisco (SFO)

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Belfast Intl to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Belfast Intl to San Francisco

Cheapest flights from Belfast Intl to San FranciscoExplore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

Explore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

Best flights from Belfast Intl to San FranciscoDiscover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 2, 2026.

Discover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 2, 2026.

Last-minute flights from Belfast Intl to San FranciscoDiscover last-minute flight deals from Belfast Intl to San Francisco. Data last updated February 2, 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated February 2, 2026 and is based on user searches.

One-way flights from Belfast Intl to San FranciscoSearch for one-way flight options from Belfast Intl to San Francisco. Find affordable one-way fares based on user searches. Data last updated February 2, 2026.

Search for one-way flight options from Belfast Intl to San Francisco. Find affordable one-way fares based on user searches. Data last updated February 2, 2026.

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Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco that are best for you.

Best time to book a flight from Belfast Intl to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast Intl with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to San Francisco. 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 into for flights to San Francisco from Belfast Intl?

Can I find deals for flights from Belfast Intl to San Francisco that include hotel bookings?

How can I find direct flights from Belfast Intl to San Francisco?

Can I find deals for business class flights from Belfast Intl to San Francisco?

Traveling to a place near San Francisco?

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Cheapest flights from Belfast Intl to San Francisco
Explore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

Best flights from Belfast Intl to San Francisco
Discover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 2, 2026.

Last-minute flights from Belfast Intl to San Francisco
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated February 2, 2026 and is based on user searches.

One-way flights from Belfast Intl to San Francisco
Search for one-way flight options from Belfast Intl to San Francisco. Find affordable one-way fares based on user searches. Data last updated February 2, 2026.