How long is the flight from Belfast to San Francisco?

There are many flights that can get you from Belfast to San Francisco in 15h 40m. Fly via American Airlines to get the fastest option. The distance from Belfast to San Francisco is about 5038 mi.

What is the cheapest month to book a flight from Belfast to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Belfast to San Francisco (average of $276). Flying from Belfast to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 month to fly from Belfast to San Francisco?

Our data shows that September tends to be the cheapest month to fly to San Francisco from Belfast. Users have commonly found prices around $716 for the month, but tickets can be as low as $521. Due to multiple factors, prepare for potentially higher prices in July.

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 to San Francisco as you normally would.

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

San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly into when you book flights from Belfast to San Francisco. 0 airlines have flights to San Francisco from Belfast on a regular basis. Booking flights from Belfast to San Francisco should not be difficult; the airport handles an average of 0 inbound flights from Belfast per day.

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

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

How can I find direct flights from Belfast 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 to San Francisco.

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

Yes. Cheapflights offers flight deals from Belfast 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.

$639+ Flights from Belfast to San Francisco

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Cheap flight deals from Belfast to San Francisco

Round-trip from	$639 (American Airlines)
Popular in	July
Cheapest in	September
Average price	$551

From Belfast to San Francisco

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Highest demand for flights based on searches. 11% potential increase in price ($95 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Best flights from Belfast to San Francisco
Discover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Thu 3/511:05 amBHD - SFO

1 stop15h 40mAmerican Airlines

Mon 3/910:37 amSFO - BHD

2 stops17h 03mAmerican Airlines

Deal found 9/13

$639

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BelfastSan Francisco

BHD - SFO

BHDSFO

Belfast City

Thu 3/5

11:05 am-6:45 pm

1 stop15h 40m

San Francisco

Mon 3/9

10:37 am-10:40 am

2 stops17h 03m

$639

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Best time to book a flight from Belfast to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast 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.

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Everything you need to know about your flight from Belfast to San Francisco

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly into for flights to San Francisco from Belfast?
San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly into when you book flights from Belfast to San Francisco. 0 airlines have flights to San Francisco from Belfast on a regular basis. Booking flights from Belfast to San Francisco should not be difficult; the airport handles an average of 0 inbound flights from Belfast per day.
How long is the flight from Belfast to San Francisco?
There are many flights that can get you from Belfast to San Francisco in 15h 40m. Fly via American Airlines to get the fastest option. The distance from Belfast to San Francisco is about 5038 mi.
Can I find deals for flights from Belfast to San Francisco that include hotel bookings?
Yes. In addition to deals on Belfast to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Belfast 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 to San Francisco.
Can I find deals for business class flights from Belfast to San Francisco?
Yes. Cheapflights offers flight deals from Belfast 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.
What is the cheapest month to book a flight from Belfast to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Belfast to San Francisco (average of $276). Flying from Belfast to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Roseville

Santa Cruz

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Turlock

Antioch

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Santa Clara

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Hollister

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$639+ Cheap flights from Belfast 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Belfast to San Francisco with Cheapflights

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Cheap flight deals from Belfast to San Francisco

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Find flight deals from Belfast to San Francisco

Best flights from Belfast to San FranciscoDiscover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Discover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Belfast to San Francisco

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

Cheapflights Insights

Everything you need to know about your flight from Belfast to San Francisco

Related info for your journey

Find useful and relevant information for your journey from Belfast 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?

How long is the flight from Belfast to San Francisco?

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

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

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

What is the cheapest month to book a flight from Belfast to San Francisco?

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Best flights from Belfast to San Francisco
Discover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.