Cheap Flights from Belfast to San Francisco International

Compare Belfast to San Francisco International flight deals

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

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 ج.م.‏ 41,540. 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 May.

Belfast to San Francisco: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 22,820
Cheapest month to flyMay

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 ج.م.‏ 41,540. 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 ج.م.‏ 41,540.
As of April 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 May.
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, 18 May 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

  • San Francisco International Airport is located in San Francisco. The city operates on the UTC-8 timezone and is eight hours behind Belfast.

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

  • During popular months such as June, you'll want to get to the airport earlier than usual. Arrive two hours before a domestic departure and four hours ahead for an international flight whenever you're travelling during a peak period in general.

Airports in Belfast

Belfast International Airport (BFS)

  • Stopovers are the perfect opportunity to break up your journey and maybe even explore a different city. When browsing cheap flights from Belfast to SFO departing from Belfast International Airport (BFS), deselect the 'Direct flights only' box to find out where you can visit along the way. Some popular options include:

    • Amsterdam Schiphol Airport (AMS)

    • Paris Charles de Gaulle Airport (CDG)

    • Barcelona-El Prat Airport (BCN)

  • Travelling from central Belfast to BFS takes around 45 minutes by public transport. If you drive, ride-share or get a taxi, you'll cover the 19 kilometres in 25 minutes or so, depending on traffic conditions.

  • Have an early flight from Belfast to San Francisco International Airport? Avoid the mad dash to the terminal (and enjoy a little extra shut-eye) by staying at one of these hotels near Belfast International Airport:

  • When it comes to Belfast International Airport's on-time performance, data shows 68% of flights arrive within the expected time frame.

George Best Belfast City Airport (BHD)

  • Break up your flight from Belfast to San Francisco International Airport with a stop at London Heathrow Airport (LHR). One of the main stopovers between George Best Belfast City Airport and SFO, it's a great opportunity to relax before the next leg of your journey.

  • BHD is about 5 kilometres from central Belfast. It'll take 15 minutes or so to get to the airport driving from the city centre. Public transport takes approximately 25 minutes.

  • Got a crack-of-dawn departure? You might like to check in to one of these hotels near George Best Belfast City Airport the day before your Belfast to SFO flight:

  • When it comes to keeping flights punctual, George Best Belfast City Airport has an on-time arrival performance of 69%.

About San Francisco International Airport (SFO)

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

  • San Francisco International Airport is around 21 kilometres from central San Francisco. It takes around 25 minutes or so to drive to the city.

  • Travelling on public transport takes around 35 minutes.

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

  • At the moment, ج.م.‏ 22,820 is the best price we've found for a one-way ticket from Belfast to San Francisco International Airport. The cheapest price for a return flight is ج.م.‏ 41,540. Remember fares may change due to demand at the time of booking.

  • Don't leave things to the last moment. You're more likely to find cheap flights from Belfast to SFO if you book early. Airlines often have some excellent early bird discounts.

  • Affordable Belfast to San Francisco International Airport tickets are easier to find if your travel dates are flexible. Try using the 'Whole month' search function to compare fares across each month and then fly out on the cheapest day.

  • Finding a cheap plane ticket from Belfast to SFO couldn't be easier with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know when there's a better deal.

  • Find a cheap flight from Belfast to San Francisco International Airport by using the search filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

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

  • It's time to work out your travel dates for your flight from Belfast to San Francisco International Airport (SFO). May is the busiest month to visit San Francisco. If crowds aren't your thing, think about going in January.

  • Lock in a Belfast to SFO plane ticket departing in September if you want to explore the city during its warmest month. You can expect temperatures in San Francisco to range from 12ºC to 22ºC.

  • For cooler conditions, look for a cheap ticket from Belfast to San Francisco International Airport in January when temperatures are between 6ºC and 16ºC.

More about San Francisco

Explore more of the United States

  • You've visited San Francisco, now it's time to discover other parts of the United States. Travel around 257 kilometres east to Fresno to check off its top attractions. From Forestiere Underground Gardens to Shinzen Japanese Garden and Fresno Chaffee Zoo, you'll have a full itinerary ahead.

  • Around 129 kilometres northeast of San Francisco, Sacramento is another favourite stop in the United States. No visit is complete without checking out Old Sacramento Waterfront, California State Railroad Museum and Old Sacramento State Historic Park.

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