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Cheap flights from Belfast Intl Airport to San Francisco Bay Area from £920

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
2 May — 9 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to San Francisco Bay Area

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to San Francisco Bay Area
Explore the most affordable flight options available from Belfast Intl to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2026.

Thu 16/415:25
BFS
-
SFO
2 stops33h 25m
Multiple Airlines
Mon 20/415:05
SFO
-
BFS
2 stops21h 20m
Multiple Airlines
Deal found 28/3£920
Fri 3/415:15
BFS
-
SFO
2 stops33h 25m
Multiple Airlines
Tue 7/417:35
SFO
-
BFS
2 stops19h 40m
Multiple Airlines
Deal found 1/4£1,372

Find flight deals from Belfast Intl to San Francisco Bay Area

Keep the following information in mind while searching for Belfast Intl to San Francisco Bay Area flight deals. Data was last updated 2 April 2026.

Round-trip from

£920

One-way from

£357

Popular in

March

Cheapest in

September

Average price

£492
16/4-20/4
  • 16/4-20/4
  • 4 total stops
  • 54h 45m total
  • Belfast to San Francisco Bay Area
Search Deals
3/9
  • 3/9
  • 3 total stops
  • 50h 50m total
  • Belfast to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£79 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to San Francisco Bay Area 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 April 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco Bay Area that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Thu 16/4

15:25-16:50

2 stops33h 25m

San Francisco

Mon 20/4

15:05-20:25

2 stops21h 20m

£920

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Sorted by cheapest first

Best time to book a flight from Belfast Intl to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area from Belfast Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast Intl Airport to San Francisco Bay Area
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing San Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. 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 Bay Area. Reviews last updated 2 April 2026.
Check out reviews from past customers who have flown with American Airlines and British Airways from Belfast Intl Airport to San Francisco Bay Area to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,549 reviews
Check prices

Overall

7.1

Boarding

7.5

Crew

8.0

Entertainment

6.9

Comfort

7.2

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,549 reviews
American Airlines
7.1
Good
11,549 reviews
Check prices

Overall

7.1

Boarding

7.5

Crew

8.0

Entertainment

6.9

Comfort

7.2

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
British Airways
6.7
Okay
7,841 reviews
American Airlines
7.1
Good
11,549 reviews
Check prices

Overall

7.1

Boarding

7.5

Crew

8.0

Entertainment

6.9

Comfort

7.2

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to San Francisco Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Belfast Intl to San Francisco Bay Area that include hotel bookings?

    Yes. In addition to deals on Belfast Intl to San Francisco Bay Area flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast Intl to San Francisco Bay Area?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to San Francisco Bay Area.

  • Can I find deals for business class flights from Belfast Intl to San Francisco Bay Area?

    Yes. Cheapflights offers flight deals from Belfast Intl to San Francisco Bay Area by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Belfast Intl to San Francisco Bay Area

Discover the top 2 airlines that operate flights from Belfast Intl to San Francisco Bay Area. 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 April 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£431Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£477Average£528FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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 Intl to San Francisco Bay Area?

Deals for Belfast Intl to San Francisco Bay Area flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to San Francisco Bay Area?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco Bay Area from Belfast Intl.

Can Cheapflights find flights from Belfast Intl to San Francisco Bay Area with no change fees?

Certainly. Search results for flights to San Francisco Bay Area from Belfast Intl 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 Intl to San Francisco Bay Area become cheaper?

Yes, Cheapflights offers price alerts on Belfast Intl to San Francisco Bay Area flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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