In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

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

When flying from Belfast Intl Airport to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 11.0 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 holiday 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.

£358+ Cheap Flights from Belfast Intl Airport to San Francisco

Cheap flight deals from Belfast Intl to 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 12 October 2026.

Wed 4/1110:55 -

2 stops34h 00m

Wed 11/1115:10 -

2 stops22h 50m

Deal found 7/10£596

Wed 25/1115:25 -

2 stops31h 25m

Wed 2/1216:45 -

2 stops20h 10m

Deal found 11/10£663

Sun 22/1115:25 -

2 stops33h 05m

Sun 29/1119:25 -

2 stops18h 00m

Deal found 8/10£672

Thu 5/1108:50 -

3 stops39h 15m

Mon 9/1117:20 -

2 stops17h 50m

Deal found 9/10£712

Wed 14/1015:40 -

2 stops31h 00m

Wed 21/1016:45 -

2 stops21h 35m

Deal found 8/10£817

Find flight deals from Belfast Intl to San Francisco

Round-trip from	£596
One-way from	£358

4/11-11/11
4 total stops
56h 50m total
Belfast to San Francisco

Search Deals

8/11-31/12
3 total stops
39h 30m total
Belfast to San Francisco

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.

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Price

Cheapest return flight

Fastest return journey

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Sun 8/11

06:55-14:25

3 stops39h 30m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£358

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Fri 18/12

19:40-15:35

2 stops51h 55m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£441

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Wed 4/11

10:55-12:55

2 stops34h 00m

San Francisco

Wed 11/11

15:10-22:00

2 stops22h 50m

£596

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Wed 25/11

15:25-14:50

2 stops31h 25m

San Francisco

Wed 2/12

16:45-20:55

2 stops20h 10m

£663

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Thu 5/11

08:50-16:05

3 stops39h 15m

San Francisco

Mon 9/11

17:20-19:10

2 stops17h 50m

£712

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Sun 22/11

09:25-22:27

2 stops21h 02m

San Francisco

Sun 29/11

15:10-20:10

1 stop21h 00m

£756

Flights are sorted by cheapest return flights first.

Deals found on 7/10

Sorted by cheapest first

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 return 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 11.0 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 holiday 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.

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Cheap flights from Belfast Intl Airport to San Francisco from £358

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel.

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 12 October 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 12 October 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 stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Discover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Last-minute flights from Belfast Intl to San FranciscoDiscover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 12 October 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 12 October 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 12 October 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 12 October 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

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?

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast Intl to San Francisco

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Complete your trip

Complete your trip to San Francisco by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to California

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Search flights from Belfast Intl to San Francisco by cabin class

Find flights from Belfast Intl to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Belfast Intl and San Francisco flights

Browse other Belfast Intl and San Francisco flight options. Last updated on 12 October 2026.

Other flights from Belfast Intl

Browse through other flights departing from Belfast Intl. Flights are based on user searches made on Cheapflights and were last updated on 12 October 2026.

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How does Cheapflights help users find flights from Belfast Intl to San Francisco?

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Can Cheapflights find flights from Belfast Intl to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from Belfast Intl to San Francisco become cheaper?

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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 12 October 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 stopovers in mind to ensure you get the best travel experience. Data last updated 12 October 2026.

Last-minute flights from Belfast Intl to San Francisco
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 12 October 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 12 October 2026.