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Cheap flights from San Francisco to Belfast Intl Airport from £254

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Belfast Intl
Explore the most affordable flight options available from San Francisco to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 March 2026.

Sat 16/513:20
SFO
-
BFS
2 stops44h 15m
Multiple Airlines
Thu 28/520:05
BFS
-
SFO
1 stop32h 45m
Multiple Airlines
Deal found 10/3£741
Thu 4/616:05
SFO
-
BFS
1 stop22h 45m
Multiple Airlines
Sun 14/622:10
BFS
-
SFO
2 stops29h 00m
Multiple Airlines
Deal found 11/3£840
Tue 5/513:00
SFO
-
BFS
3 stops27h 05m
Multiple Airlines
Thu 25/606:40
BFS
-
SFO
2 stops16h 47m
Multiple Airlines
Deal found 11/3£844
Tue 31/308:30
SFO
-
BFS
2 stops27h 20m
Multiple Airlines
Mon 6/421:25
BFS
-
SFO
2 stops23h 15m
Multiple Airlines
Deal found 11/3£899
Tue 24/314:30
SFO
-
BFS
2 stops19h 30m
Multiple Airlines
Thu 16/420:05
BFS
-
SFO
1 stop32h 45m
Multiple Airlines
Deal found 12/3£902
Tue 24/314:10
SFO
-
BFS
2 stops24h 40m
Multiple Airlines
Mon 30/318:50
BFS
-
SFO
2 stops29h 50m
Multiple Airlines
Deal found 12/3£912
Sun 22/314:10
SFO
-
BFS
2 stops23h 00m
Multiple Airlines
Mon 30/308:15
BFS
-
SFO
2 stops34h 35m
Multiple Airlines
Deal found 11/3£1,008

Find flight deals from San Francisco to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Belfast Intl (BFS). 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 13 March 2026.

Round-trip from

£741

One-way from

£254

Popular in

June

Cheapest in

April

Average price

£573
16/5-28/5
  • 16/5-28/5
  • 3 total stops
  • 77h 00m total
  • San Francisco to Belfast
Search Deals
27/4
  • 27/4
  • 3 total stops
  • 40h 05m total
  • San Francisco to Belfast
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£88 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 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 13 March 2026.
Use the filters below to find and compare flights from San Francisco to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/5

13:00-00:05

3 stops27h 05m

Belfast Intl

Thu 25/6

06:40-15:27

2 stops16h 47m

£844

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 16/5

20:30-15:00

1 stop34h 30m

Belfast Intl

Thu 28/5

20:05-20:50

1 stop32h 45m

£865

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 31/3

08:30-19:50

2 stops27h 20m

Belfast Intl

Mon 6/4

21:25-12:40

2 stops23h 15m

£899

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 24/3

14:10-21:50

2 stops24h 40m

Belfast Intl

Mon 30/3

18:50-16:40

2 stops29h 50m

£912

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 1/7

16:30-23:10

2 stops22h 40m

Belfast Intl

Fri 3/7

16:10-14:30

2 stops30h 20m

£1,067

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 27/3

15:40-22:00

2 stops23h 20m

Belfast Intl

Mon 6/4

17:35-21:30

3 stops35h 55m

£1,195
Cheapest one-way
Fastest single journey

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 27/4

07:00-07:05

3 stops40h 05m

£254

Flights are sorted by cheapest return flights first.

Deals found on 12/3

Sorted by cheapest first

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

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

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

Currently, March is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of £439). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of £907). 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.

How much does it cost for a return flight from San Francisco to Belfast Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from San Francisco 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 airport do you fly from for flights from San Francisco to Belfast Intl?

    San Francisco (SFO), located 11.8 mi from the city center, is the airport you fly out of when you book flights from San Francisco to Belfast Intl. 0 airlines have flights from San Francisco to Belfast Intl on a regular basis. Booking flights from San Francisco to Belfast Intl should not be difficult; the airport handles an average of 0 outbound flights to Belfast Intl per day.

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

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

  • How can I find direct flights from San Francisco 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 to Belfast Intl.

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

    Yes. Cheapflights offers flight deals from San Francisco 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 to Belfast Intl Airport?

    Currently, March is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of £439). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of £907). 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 to Belfast Intl

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco 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 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.

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

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

Not ready to book yet? You can track prices for flights from San Francisco to Belfast Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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