Cheap Flights from San Francisco (SFO) to Belfast (BFS)

Popular airlines from San Francisco Intl. Airport (SFO) to Belfast International Airport (BFS)

Find the cheapest month to fly from San Francisco (SFO) to Belfast (BFS)

October is typically the cheapest month to fly

From $599 - $1,369 per traveler.

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS) cost?
Lock in a cheap one-way flight or cheap return flight from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS)?
is the least expensive month to fly from SFO to BFS. Planning your trip for the off-season is often the key to landing a great deal.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS)?
To find the cheapest airline flying from SFO to BFS, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS)?
Nonstop flights from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SFO to BFS?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS)?
To avoid possible delays on the San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS) route, fly before 3 PM. Departures after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS) last-minute?
Booking your plane ticket from SFO to BFS shortly before your journey is typically more expensive. But if you're flexible with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a SFO to BFS flight and hotel package?
Securing a SFO to BFS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Select from our wide range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Belfast Intl. Airport (BFS)?
It's generally possible to cancel or reschedule your SFO to BFS flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Belfast Intl.
Distance
5029 mi

Book with confidence

San Francisco to Belfast Flights

The cheapest times to fly from San Francisco to Belfast

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Belfast are during the month of . You can find some of the cheapest flights from San Francisco to Belfast with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Belfast

Sunday is one of the best days to book for cheap flights from San Francisco to Belfast: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Belfast

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Belfast in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Belfast flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Belfast airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Francisco to Belfast Flights

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*Available to One Key members.