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

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Compare Belfast International to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

Book the best San Francisco International fare with no extra fees

Flight deals from Belfast International to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Belfast International to San Francisco International? Find the lowest prices on one-way and return tickets right here.
San Francisco.$1,075 per passenger.Departing Mon, 30 Jun, returning Mon, 7 Jul.Return flight with easyJet and United.Outbound indirect flight with easyJet, departs from Belfast International on Mon, 30 Jun, arriving in San Francisco International.Inbound indirect flight with United, departs from San Francisco International on Mon, 7 Jul, arriving in Belfast International.Price includes taxes and charges.From $1,075, select.
San Francisco.$1,668 per passenger.Departing Sat, 23 Aug, returning Thu, 4 Sep.Return flight with Ryanair and Aer Lingus.Outbound indirect flight with Ryanair, departs from Belfast International on Sat, 23 Aug, arriving in San Francisco International.Inbound indirect flight with Aer Lingus, departs from San Francisco International on Thu, 4 Sep, arriving in Belfast International.Price includes taxes and charges.From $1,668, select.

Belfast International to San Francisco International: Alternative routes

Compare routes from Belfast International to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Belfast to San Francisco: Flight information

The things to know before you go.
Cheapest flight found$1,075
Cheapest month to flyJune

Finding cheap flights from Belfast International to San Francisco International: Frequently asked questions

The best price we found for a return flight from Belfast International to San Francisco International is $1,075. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Belfast International to San Francisco International. But we found flights with one or more stops from $1,075.
As of May 2025, there are no flights flying from Belfast International to San Francisco International.
The cheapest month to fly from Belfast International to San Francisco International is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Belfast International Airport to San Francisco International Airport on Monday, 30 June 2025.
No airlines currently offer direct flights between Belfast International Airport and San Francisco International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, easyJet offers the cheapest flight tickets to San Francisco International.

Travelling from Belfast International Airport (BFS) to San Francisco International Airport (SFO): what you need to know

  • San Francisco's timezone is UTC-7, making San Francisco seven hours behind Belfast.

  • Give yourself enough time to catch your BFS to SFO flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience bigger queues in popular months like August. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will help ensure a smooth travel experience.

  • We make it simple to book a flight with a stopover. To see all your options for tickets from Belfast International Airport to San Francisco International Airport, deselect 'Direct flights only.' Then, choose a flight offering a stop long enough to visit the city of your choice. Popular stopovers between BFS and SFO include:

    • Amsterdam Airport Schiphol

    • Barcelona-El Prat Airport

    • Charles de Gaulle Airport

How to find the cheapest flights from Belfast International Airport (BFS) to San Francisco International Airport (SFO)

  • The cheapest price we've found for a one-way Belfast International Airport to San Francisco International Airport flight is $807. A return ticket right now is $1,075. Depending on the availability when you book, these fares could change.

  • To find cheap tickets from BFS to SFO, book early. Airlines generally offer the most competitive fares when flights are first released.

  • If you can be flexible with your travel dates, try using the 'Whole month' tool. It'll show you the cheapest price across every month when searching for your flight from Belfast International Airport to San Francisco International Airport.

  • Landing cheap flights from BFS to SFO is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch as soon as fares go down.

  • Pick your ideal departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Belfast International Airport to San Francisco International Airport.

Handy information about Belfast International Airport (BFS)

  • Of all flights leaving Belfast International Airport, 67.55% arrive as scheduled at their destination.

  • To get to Belfast International Airport from central Belfast, it'll take about 30 minutes if you're travelling by car. This depends on traffic, however. It's approximately 32 kilometres from the airport to the city centre.

  • You can expect a trip time of around 2 hours on public transport.

  • Taking an early flight from Belfast International Airport to San Francisco International Airport? Avoid rushing to the terminal (and sneak in some extra precious sleep) by picking one of these stays close to BFS:

Arriving at San Francisco International Airport (SFO)

Getting from San Francisco International Airport (SFO) to central San Francisco

  • From San Francisco International Airport, San Francisco is approximately 21 kilometres away. It takes around 20 minutes to reach the centre driving.

  • Getting to the centre on public transport will take you roughly 45 minutes.

When to fly to San Francisco International Airport (SFO)

  • August is the most popular month for flights from Belfast International Airport to San Francisco International Airport. For smaller crowds, head to San Francisco in February.

  • When booking your flight from Belfast International Airport to San Francisco International Airport, consider the kind of weather you enjoy. September is the warmest month in San Francisco, with the temperature ranging from 12ºC (54ºF) to 22ºC (72ºF).

  • For cooler conditions, search for a cheap ticket from BFS to SFO in January. Temperatures average between 6ºC (43ºF) and 16ºC (61ºF) then.

Explore more of United States

  • San Francisco has plenty to offer, but there are so many other parts of United States just waiting to be explored. Around 64 kilometres south-east of San Francisco, a trip to San Jose will fill your itinerary to the brim. Start with attractions like Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • If you're ready to explore another well-known destination in United States, consider Fresno, roughly 257 kilometres south-east of San Francisco. Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden are among the biggest draws.

Plan the rest of your trip from Belfast to San Francisco

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.