Cheap flights from Belfast to San Francisco from £391
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 July 2025.
Round-trip from | £391 |
---|---|
Popular in | December |
Cheapest in | April |
Average price | £707 |
Find flight deals from Belfast to San Francisco
Cheapest flights from Belfast to San FranciscoExplore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2025.
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Belfast to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 July 2025.
Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Thu 20/11
09:00-18:45
1 stop17h 45m
San Francisco
Tue 25/11
17:30-18:40
1 stop17h 10m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Mon 15/9
19:30-18:35
2 stops31h 05m
San Francisco
Sun 21/9
22:43-08:50
2 stops26h 07m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Mon 10/11
17:20-22:44
2 stops37h 24m
San Francisco
Sun 16/11
15:00-21:00
2 stops46h 00m
BelfastSan Francisco
BFS - SFO
BFSSFO
Belfast Intl
Thu 20/11
06:00-19:30
1 stop21h 30m
San Francisco
Tue 25/11
16:05-21:30
1 stop21h 25m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Wed 20/8
06:30-11:45
1 stop13h 15m
San Francisco
Fri 5/9
13:20-16:55
2 stops19h 35m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Thu 14/8
17:25-11:45
1 stop26h 20m
San Francisco
Thu 21/8
13:45-16:55
1 stop19h 10m
BelfastSan Francisco
BFS - SFO
BFSSFO
Belfast Intl
Wed 13/8
05:45-21:25
3 stops23h 40m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Mon 21/7
18:30-23:48
2 stops37h 18m
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Mon 21/7
19:30-13:50
1 stop26h 20m
Best time to book a flight from Belfast to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast to San Francisco
What is the cheapest month to book a flight from Belfast to San Francisco?
Currently, February is the cheapest month in which you can book a flight from Belfast to San Francisco (average of £538). Flying from Belfast to San Francisco in July is currently the most expensive (average of £803). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BFS to SFO?
Find hourly flight availability from Belfast to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 July 2025.
One of the essential ways to save on airfare from Belfast to San Francisco is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 10% on airfare.
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 2 July 2025.
Read through reviews of airlines operating flights from Belfast to San Francisco, such as Delta, KLM, andFinnair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Entertainment
Food
Overall
Comfort
Crew
Boarding
Reviews
Aaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Belfast to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Belfast?
Book flights to Belfast if you plan to visit one of these locationsBrowse 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 Belfast to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Belfast to San Francisco
Discover the top 2 airlines that operate flights from Belfast to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 2 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Belfast to San Francisco?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Belfast today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Belfast to San Francisco?
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 Belfast to San Francisco.
Can Cheapflights find flights from Belfast to San Francisco with no change fees?
Certainly. Search results for flights to San Francisco from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Belfast to San Francisco become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Belfast today and book when prices fit your budget.