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.

£380+ Cheap Flights from Belfast Intl Airport to San Francisco

Cheap flight deals from Belfast Intl to San Francisco

Enter your travel dates to find the best prices.

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Best

Last-minute

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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 7 September 2026.

Wed 14/1008:15 -

3 stops36h 05m

Wed 21/1013:00 -

2 stops22h 15m

Deal found 2/9£658

Thu 22/1015:35 -

2 stops31h 05m

Thu 29/1017:45 -

2 stops19h 45m

Deal found 6/9£715

Tue 20/1010:35 -

3 stops36h 00m

Tue 3/1108:25 -

3 stops24h 55m

Deal found 2/9£768

Tue 20/1008:50 -

3 stops37h 45m

Tue 27/1008:25 -

3 stops29h 30m

Deal found 4/9£778

Wed 16/921:35 -

3 stops32h 20m

Wed 23/908:10 -

3 stops24h 00m

Deal found 2/9£821

Thu 1/1006:10 -

3 stops23h 45m

Thu 8/1016:30 -

3 stops21h 10m

Deal found 2/9£836

Find flight deals from Belfast Intl to San Francisco

Round-trip from	£658
One-way from	£380

14/10-21/10
5 total stops
58h 20m total
Belfast to San Francisco

Search Deals

29/9-31/12
3 total stops
57h 40m 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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Tue 29/9

20:15-21:55

3 stops57h 40m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£380

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Thu 22/10

15:35-14:40

2 stops31h 05m

San Francisco

Thu 29/10

17:45-20:30

2 stops19h 45m

£715

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Wed 14/10

11:30-14:30

2 stops35h 00m

San Francisco

Wed 21/10

13:00-19:15

2 stops22h 15m

£739

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Tue 20/10

10:35-14:35

3 stops36h 00m

San Francisco

Tue 3/11

08:25-17:20

3 stops24h 55m

£768

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Tue 20/10

08:50-14:35

3 stops37h 45m

San Francisco

Tue 27/10

08:25-20:55

3 stops29h 30m

£778

Fastest return journey

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Thu 1/10

06:10-21:55

3 stops23h 45m

San Francisco

Thu 8/10

16:30-21:40

3 stops21h 10m

£836

BelfastSan Francisco

BFS Belfast Intl - SFO San Francisco

BFSSFO

Belfast Intl

Sat 17/10

06:55-23:20

3 stops24h 25m

San Francisco

Sat 24/10

13:00-22:25

2 stops25h 25m

£903

Flights are sorted by cheapest return flights first.

Deals found on 4/9

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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Cheapflights makes it easy to find Belfast Intl to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to San Francisco?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast Intl to San Francisco for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Belfast Intl to San Francisco flexibly with Cheapflights today.

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Cheap flights from Belfast Intl Airport to San Francisco from £380

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/9. 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 7 September 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 7 September 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 7 September 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 7 September 2026.

Last-minute flights from Belfast Intl to San FranciscoDiscover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 7 September 2026 and is based on user searches.

Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 7 September 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 7 September 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 7 September 2026.

Find flight deals from Belfast Intl to San Francisco

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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

See prices for flight routes from nearby airports that may be better suited for you.

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

Book a non-stop flight to one of these other cities located in California.

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 7 September 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 7 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to San Francisco

Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 7 September 2026.

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

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to San Francisco?

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 7 September 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 7 September 2026.

Last-minute flights from Belfast Intl to San Francisco
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated 7 September 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 7 September 2026.