How long is the flight from San Francisco to Belfast?

Departing from San Francisco to Belfast will take you 17h 10m. The distance between San Francisco and Belfast is about 5038 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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

When flying from San Francisco to Belfast, 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 from for flights from San Francisco to Belfast?

If you book a flight to Belfast from San Francisco, you will be flying from 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 San Francisco to Belfast per day from 0 different airlines.

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

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

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

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

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

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

£578+ Cheap Flights from San Francisco to Belfast

Cheap flight deals from San Francisco to Belfast

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from San Francisco to Belfast
Explore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2026.

Sun 18/1006:00 -

2 stops28h 25m

Sun 8/1114:20 -

3 stops32h 25m

Deal found 25/8£578

Sun 18/1006:00 -

2 stops24h 55m

Sun 8/1112:05 -

3 stops34h 40m

Deal found 25/8£610

Mon 5/1019:30 -

1 stop15h 55m

Mon 12/1018:30 -

1 stop27h 20m

Deal found 21/8£659

Mon 5/1019:30 -

1 stop17h 05m

Mon 19/1018:30 -

1 stop27h 20m

Deal found 23/8£661

Mon 5/1006:35 -

2 stops18h 45m

Mon 19/1017:30 -

2 stops30h 24m

Deal found 23/8£683

Sun 18/1019:30 -

1 stop14h 10m

Sun 8/1106:30 -

1 stop16h 25m

Deal found 25/8£687

Sun 18/1008:50 -

2 stops17h 40m

Sun 8/1106:30 -

1 stop16h 25m

Deal found 25/8£698

Mon 5/1014:18 -

2 stops17h 12m

Mon 12/1011:35 -

2 stops20h 02m

Deal found 21/8£705

Mon 5/1006:40 -

3 stops20h 35m

Mon 19/1015:05 -

2 stops32h 50m

Deal found 23/8£793

Mon 5/1016:45 -

2 stops20h 10m

Mon 12/1014:20 -

3 stops32h 20m

Deal found 21/8£805

Sat 5/908:30 -

2 stops17h 05m

Sat 12/906:55 -

2 stops23h 00m

Deal found 22/8£1,359

Find flight deals from San Francisco to Belfast

Round-trip from	£578

18/10-8/11
5 total stops
60h 50m total
San Francisco to Belfast

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Cheapflights Fare Finder

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

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Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sun 18/10

06:00-20:55

2 stops30h 55m

Belfast Intl

Sun 8/11

09:25-20:10

1 stop18h 45m

£629

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Mon 5/10

06:35-09:20

2 stops18h 45m

Belfast City

Mon 19/10

17:30-15:54

2 stops30h 24m

£683

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 5/10

06:40-11:15

3 stops20h 35m

Belfast Intl

Mon 19/10

15:05-15:55

2 stops32h 50m

£793

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 5/10

16:30-19:05

2 stops18h 35m

Belfast Intl

Mon 12/10

21:35-15:55

2 stops26h 20m

£863

Fastest return journey

San FranciscoBelfast

SFO San Francisco - BHD Belfast City

SFOBHD

San Francisco

Mon 16/11

17:25-18:35

1 stop17h 10m

Belfast City

Fri 20/11

08:35-18:45

1 stop18h 10m

£888

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sat 5/9

08:30-09:35

2 stops17h 05m

Belfast Intl

Sat 12/9

06:55-21:55

2 stops23h 00m

£1,359

Flights are sorted by cheapest return flights first.

Deals found on 25/8

Sorted by cheapest first

Best time to book a flight from San Francisco to Belfast

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

SFO-BF1

SFO-BHD

SFO-BFS

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.

Cheapflights Insights

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

SFO-BF1

SFO-BHD

SFO-BFS

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

Related info for your journey

What airport do you fly from for flights from San Francisco to Belfast?
If you book a flight to Belfast from San Francisco, you will be flying from 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 San Francisco to Belfast per day from 0 different airlines.
How long is the flight from San Francisco to Belfast?
Departing from San Francisco to Belfast will take you 17h 10m. The distance between San Francisco and Belfast is about 5038 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from San Francisco to Belfast that include hotel bookings?
Yes. In addition to deals on San Francisco to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco to Belfast?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Belfast.
Can I find deals for business class flights from San Francisco to Belfast?
Yes. Cheapflights offers flight deals from San Francisco to Belfast 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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How does Cheapflights help users find flights from San Francisco to Belfast?

Deals for San Francisco to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Francisco to Belfast.

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

Yes, we can. To see specific flights from San Francisco to Belfast with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

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Cheap flights from San Francisco to Belfast from £578

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from San Francisco to Belfast

Cheapest flights from San Francisco to BelfastExplore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2026.

Explore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2026.

Best flights from San Francisco to BelfastDiscover carefully curated flight deals from San Francisco to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 26 August 2026.

Discover carefully curated flight deals from San Francisco to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 26 August 2026.

Last-minute flights from San Francisco to BelfastDiscover last-minute flight deals from San Francisco to Belfast. Data last updated 26 August 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Belfast. Data last updated 26 August 2026 and is based on user searches.

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

Best time to book a flight from San Francisco to Belfast

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

Cheapflights Insights

Related info for your journey

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

How long is the flight from San Francisco to Belfast?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Belfast

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

Complete your trip

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

Direct flights to Northern Ireland

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

Search flights from San Francisco to Belfast by cabin class

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

San Francisco and Belfast flights

Browse other San Francisco and Belfast flight options. Last updated on 26 August 2026.

Other flights from San Francisco

Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 26 August 2026.

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

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

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

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

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Book with Flexibility

Travel Smart

Cheapest flights from San Francisco to Belfast
Explore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 August 2026.

Best flights from San Francisco to Belfast
Discover carefully curated flight deals from San Francisco to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 26 August 2026.

Last-minute flights from San Francisco to Belfast
Discover last-minute flight deals from San Francisco to Belfast. Data last updated 26 August 2026 and is based on user searches.