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Cheap flights from San Francisco Bay Area to Belfast Intl Airport from £274

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

Cheap flight deals from San Francisco Bay Area to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco Bay Area to Belfast Intl
Explore the most affordable flight options available from San Francisco Bay Area to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2026.

Tue 5/512:55
SFO
-
BFS
2 stops26h 25m
Multiple Airlines
Tue 12/520:15
BFS
-
SFO
2 stops28h 25m
Multiple Airlines
Deal found 21/3£647
Tue 2/606:00
SFO
-
BFS
3 stops26h 20m
Multiple Airlines
Tue 16/623:30
BFS
-
SFO
3 stops47h 00m
Multiple Airlines
Deal found 21/3£737
Tue 4/808:30
SFO
-
BFS
2 stops22h 45m
Multiple Airlines
Tue 18/807:35
BFS
-
SFO
3 stops39h 00m
Multiple Airlines
Deal found 22/3£787
Mon 1/606:00
SFO
-
BFS
2 stops29h 05m
Multiple Airlines
Mon 8/621:55
BFS
-
SFO
2 stops26h 00m
Multiple Airlines
Deal found 21/3£931
Sat 11/708:30
SFO
-
BFS
2 stops17h 05m
Multiple Airlines
Sun 26/707:10
BFS
-
SFO
3 stops36h 50m
Multiple Airlines
Deal found 22/3£934
Sat 5/920:30
SFO
-
BFS
1 stop17h 45m
Multiple Airlines
Sat 19/908:55
BFS
-
SFO
2 stops35h 45m
Multiple Airlines
Deal found 21/3£935
Sun 22/315:40
SFO
-
BFS
2 stops18h 35m
Multiple Airlines
Sun 29/319:20
BFS
-
SFO
3 stops47h 30m
Multiple Airlines
Deal found 21/3£949
Thu 7/511:54
SJC
-
BFS
3 stops24h 41m
Multiple Airlines
Thu 14/506:10
BFS
-
SJC
3 stops25h 21m
Multiple Airlines
Deal found 23/3£1,203
Thu 2/411:35
SJC
-
BFS
3 stops27h 15m
Multiple Airlines
Sun 5/421:05
BFS
-
SJC
3 stops30h 55m
Multiple Airlines
Deal found 20/3£2,443

Find flight deals from San Francisco Bay Area to Belfast Intl

Keep the following information in mind while searching for San Francisco Bay Area to Belfast Intl flight deals. Data was last updated 25 March 2026.

Round-trip from

£647

One-way from

£274

Popular in

June

Cheapest in

April

Average price

£646
5/5-12/5
  • 5/5-12/5
  • 4 total stops
  • 54h 50m total
  • San Francisco Bay Area to Belfast
Search Deals
1/9
  • 1/9
  • 2 total stops
  • 37h 40m total
  • San Francisco Bay Area to Belfast
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£84 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco Bay Area to Belfast Intl 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 25 March 2026.
Use the filters below to find and compare flights from San Francisco Bay Area to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/5

12:55-23:20

2 stops26h 25m

Belfast Intl

Tue 12/5

20:15-16:40

2 stops28h 25m

£647

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 4/8

08:30-15:15

2 stops22h 45m

Belfast Intl

Tue 18/8

07:35-14:35

3 stops39h 00m

£787

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 1/6

06:00-19:05

2 stops29h 05m

Belfast Intl

Mon 8/6

21:55-15:55

2 stops26h 00m

£931

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 11/7

08:30-20:40

3 stops28h 10m

Belfast Intl

Sun 26/7

07:10-12:00

3 stops36h 50m

£942

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 8/7

11:10-19:15

2 stops24h 05m

Belfast Intl

Wed 22/7

17:45-14:30

2 stops28h 45m

£1,003

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 23/5

08:30-20:40

3 stops28h 10m

Belfast Intl

Mon 15/6

21:25-21:10

2 stops31h 45m

£1,081

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 9/6

12:55-23:20

2 stops26h 25m

Belfast Intl

Sat 4/7

15:35-16:40

2 stops33h 05m

£1,140

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 12/6

06:00-21:50

3 stops31h 50m

Belfast Intl

Sat 4/7

21:40-15:27

2 stops25h 47m

£1,171
Fastest return journey

San JoseBelfast

SJC - BFS

SJCBFS

San Jose

Thu 7/5

11:54-20:35

3 stops24h 41m

Belfast Intl

Thu 14/5

06:10-23:31

3 stops25h 21m

£1,203
Cheapest one-way

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 1/9

17:40-15:20

2 stops37h 40m

£274

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 14 resultsSorted by cheapest first
1
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Best time to book a flight from San Francisco Bay Area to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from San Francisco Bay Area 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 San Francisco Bay Area to Belfast Intl Airport

What is the cheapest month to book a flight from San Francisco Bay Area to Belfast Intl Airport?

Currently, April is the cheapest month in which you can book a flight from San Francisco Bay Area to Belfast Intl Airport (average of £438). Flying from San Francisco Bay Area to Belfast Intl Airport in June is currently the most expensive (average of £905). 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.

Related info for your journey

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

  • What are the most popular routes from San Francisco Bay Area to Belfast Intl Airport?

    The most popular flight routes from San Francisco Bay Area to Belfast Intl Airport are San Francisco - Belfast Intl, San Jose - Belfast Intl and Oakland - Belfast Intl.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from San Francisco Bay Area to Belfast Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from San Francisco Bay Area to Belfast Intl Airport (average of £438). Flying from San Francisco Bay Area to Belfast Intl Airport in June is currently the most expensive (average of £905). 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.

See more FAQs

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco Bay Area to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Belfast Intl flights
Los Angeles to Belfast City flights
San Francisco to Belfast City flights

Fly with Cheapflights

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How does Cheapflights help users find flights from San Francisco Bay Area to Belfast Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco Bay Area to Belfast Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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 Belfast Intl from San Francisco Bay Area.

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

Need flexible booking options for your flight to Belfast Intl from San Francisco Bay Area? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from San Francisco Bay Area to Belfast Intl become cheaper?

Yes, Cheapflights offers price alerts on San Francisco Bay Area to Belfast Intl 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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