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.

$713+ Flights from Belfast Intl Airport to San Francisco

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Cheap flight deals from Belfast Intl to San Francisco

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 December 18, 2025.

Thu 1/292:45 pmBFS - SFO

2 stops31h 50mMultiple Airlines

Thu 2/54:40 pmSFO - BFS

2 stops21h 20mMultiple Airlines

Deal found 12/15

$713

Wed 1/146:00 amBFS - SFO

2 stops38h 12mMultiple Airlines

Wed 1/214:30 pmSFO - BFS

1 stop17h 30mMultiple Airlines

Deal found 12/17

$929

Last-minute flights from Belfast Intl to San Francisco
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated December 18, 2025 and is based on user searches.

Wed 1/146:00 amBFS - SFO

2 stops38h 12mMultiple Airlines

Wed 1/214:30 pmSFO - BFS

1 stop17h 30mMultiple Airlines

Deal found 12/17

$929

Thu 1/292:45 pmBFS - SFO

2 stops31h 50mMultiple Airlines

Thu 2/54:40 pmSFO - BFS

2 stops21h 20mMultiple Airlines

Deal found 12/15

$713

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 December 18, 2025.

Thu 1/16:15 amBFS - SFO

3 stops58h 08mMultiple Airlines

Deal found 12/17

$1,224

Find flight deals from Belfast Intl to San Francisco

Round-trip from	$713 (Mytrip)
Popular in	July
Cheapest in	January
Average price	$953

From Belfast Intl to San Francisco

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($151 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease ($63 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Thu 1/29

2:45 pm-2:35 pm

2 stops31h 50m

San Francisco

Thu 2/5

4:40 pm-10:00 pm

2 stops21h 20m

$713

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Wed 1/14

6:00 am-12:12 pm

2 stops38h 12m

San Francisco

Wed 1/21

4:30 pm-6:00 pm

1 stop17h 30m

$929

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 1/1

6:15 am-8:23 am

3 stops58h 08m

$1,224

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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.

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

Roseville

South San Francisco

Santa Cruz

Livermore

Turlock

Manteca

Watsonville

Redwood City

Sunnyvale

Santa Clara

San Bruno

Daly City

San Carlos

Vallejo

Hollister

San Ramon

Foster City

Union City

Davis

Emeryville

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$713+ Cheap flights from Belfast Intl (BFS) to San Francisco (SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/29. 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

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 December 18, 2025.

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 December 18, 2025.

Find flight deals from Belfast Intl to San Francisco

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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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Alternative routes for Belfast Intl to San Francisco

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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 December 18, 2025.