575 € Cheap Flights from Belfast to San Francisco International

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

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Flight deals from Belfast to San Francisco International Airport

Looking for a cheap last-minute deal or the best return flight from Belfast to San Francisco International Airport? If you want to travel next month, return fares start from 575 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Belfast to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Belfast to San Francisco International flights are currently cheapest in April.

Belfast to San Francisco: Flight information

The things to know before you go.
Cheapest flight found575 €
Cheapest month to flyApril

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

The best price we found for a return flight from Belfast to San Francisco International is 575 €. 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 to San Francisco International. But we found flights with one stop from 575 €.
As of March 2026, there are no flights flying from Belfast to San Francisco International.
The cheapest month to fly from Belfast to San Francisco International is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Belfast to San Francisco International Airport on Monday, 20 April 2026.
No airlines currently offer direct flights between Belfast 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.
The cheapest airline that flies to San Francisco International is Ryanair .

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

  • Belfast has two main airports where you can set off on your adventure. Check out your options for reserving a flight from Belfast to San Francisco International Airport (SFO) leaving from Belfast International Airport (BFS) or George Best Belfast City Airport (BHD).

  • The timezone in San Francisco is UTC-7, which is seven hours behind Belfast. San Francisco International Airport is located in San Francisco.

  • Arrive at the airport on time so you don't miss your flight from Belfast to SFO. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.

  • With more travellers during high season, it's wise to be at your terminal even earlier. Two hours for domestic flights and up to four for international trips will allow extra time for delays.

Airports in Belfast

Belfast International Airport (BFS)

  • A stopover is the ideal opportunity to take a break from travelling and maybe even tour another city. When browsing cheap flights from Belfast to SFO departing from Belfast International Airport (BFS), uncheck the 'Direct flights only' box to find all potential stops. Top options include:

    • Amsterdam Airport Schiphol (AMS)

    • Charles de Gaulle Airport (CDG)

    • Barcelona-El Prat Airport (BCN)

  • Travelling from central Belfast to BFS takes around 2 hours on public transport. If you drive, ride-share or get a cab, you'll cover the 32 kilometres in 30 minutes or so, depending on traffic.

  • Have an early flight from Belfast to San Francisco International Airport? Avoid the last-minute rush to the terminal (and enjoy a few extra z's) by staying at one of these hotels close to Belfast International Airport:

  • Of the departures from Belfast International Airport, 67.55% land on time at their destination.

George Best Belfast City Airport (BHD)

  • Consider adding a stopover to your journey at London Heathrow Airport (LHR). It's a popular transfer point for flights from Belfast to San Francisco International Airport (SFO) leaving George Best Belfast City Airport.

  • Using public transport, you can travel from central Belfast to BHD in around 20 minutes. The terminal is roughly 8 kilometres away, and getting there by car takes approximately 10 minutes.

  • Want to treat yourself to an extra night away before catching your Belfast to SFO flight? Unwind in a hotel near George Best Belfast City Airport before your break officially starts. These stays are expecting you:

  • When it comes to flight punctuality, George Best Belfast City Airport has an on-time arrival rate of 68.3%.

About San Francisco International Airport (SFO)

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

  • San Francisco International Airport is about 18 kilometres from central San Francisco. The time it takes to get there by car hire or cab will depend on the time of day. Do some research before you go.

  • If you're taking public transport, expect a journey time of about 45 minutes.

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

  • The lowest price we've found for a one-way ticket from Belfast to San Francisco International Airport is 261 €. For a return flight on this route, the best price is 575 €. Depending on when and how early you book, these fares can change.

  • Booking in advance is often the key to finding a cheap flight from Belfast to SFO. Fares tend to rise as seats fill up, so the closer you get to departure, the more expensive your ticket may be.

  • If you have some flexibility with your travel dates, use the 'Whole month' search tool. It'll show you the cheapest price across each month when searching for your Belfast to San Francisco International Airport ticket.

  • Locking in a cheap plane ticket from Belfast to SFO is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when the price has dropped.

  • Tailor your trip using filters. Select your preferred departure and arrival times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' flights from Belfast to San Francisco International Airport.

The best time to fly from Belfast to San Francisco International Airport (SFO)

  • February is the quietest month for flights from Belfast to San Francisco International Airport (SFO), while August is the busiest. Find the ideal time to go to San Francisco based on whether you like a laid-back vibe or a lively atmosphere.

  • When booking your Belfast to SFO plane ticket, consider the weather you're most comfortable in. September is the warmest month in San Francisco, with temperatures ranging from 12ºC (54ºF) to 22ºC (72ºF).

  • If you like cooler conditions, look for a cheap ticket from Belfast to San Francisco International Airport in January when temperatures are between 6ºC (43ºF) and 16ºC (61ºF).

More about San Francisco

Explore more of the United States

  • San Francisco is always a good idea, but there are so many other corners of the United States just waiting to be discovered. Around 257 kilometres east of San Francisco, a trip to Fresno will keep you on the move. Start with popular sights like Forestiere Underground Gardens, Shinzen Japanese Garden and Fresno Chaffee Zoo.

  • If you're looking to explore another major stop in the United States, head for Sacramento, about 129 kilometres north-east of San Francisco. Old Sacramento Waterfront, Fright Planet - America's Haunted Theme Park and California State Railroad Museum are among its highlights.

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