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Belfast Intl

$288+ Cheap flights from San Francisco (SFO) to Belfast Intl (BFS)

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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 September 16, 2025.

Round-trip from

$844
(Mytrip)

One-way from

$288
(Kiwi.com)

Popular in

November

Cheapest in

October

Average price

$848
From San Francisco to Belfast Intl
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One-way flight from San Francisco to Belfast Intl
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Highest demand for flights based on searches. 12% potential increase in price ($128 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Francisco to Belfast Intl

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 September 16, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:25 pmSFO - BFS
2 stops18h 55mMultiple Airlines
Thu 11/62:25 pmBFS - SFO
2 stops34h 05mMultiple Airlines
Deal found 9/15$844
This Trip.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/254:30 pmSFO - BFS
1 stop20h 45mMultiple Airlines
Sat 11/88:10 amBFS - SFO
1 stop18h 35mMultiple Airlines
Deal found 9/16$931
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:20 pmSFO - BFS
3 stops22h 40mMultiple Airlines
Fri 10/311:15 pmBFS - SFO
2 stops34h 20mMultiple Airlines
Deal found 9/16$1,006

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from San Francisco to Belfast Intl Airport that are best for you.

Fly from

San Francisco

Fly to

Belfast Intl

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 10/30

8:25 pm-10:20 pm

2 stops18h 55m

Belfast Intl

Thu 11/6

2:25 pm-4:30 pm

2 stops34h 05m

$844

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 10/25

4:30 pm-9:15 pm

1 stop20h 45m

Belfast Intl

Sat 11/8

8:10 am-6:45 pm

1 stop18h 35m

$931

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 10/20

4:20 pm-11:00 pm

3 stops22h 40m

Belfast Intl

Fri 10/31

1:15 pm-4:35 pm

2 stops34h 20m

$1,006

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 11/17

4:35 pm-7:50 am

3 stops55h 15m

$288

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 11/10

4:35 pm-7:50 am

3 stops55h 15m

$292

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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 round-trip 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, February is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of $657). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of $1,189). 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 SFO to BFS?

Find hourly flight availability from San Francisco to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s optimal to fly from San Francisco to Belfast Intl Airport in the afternoon. By choosing this option you can save up to 37% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast Intl. 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 Belfast Intl. Reviews last updated September 16, 2025.
See what other customers who have flown with American Airlines and British Airways from San Francisco to Belfast Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Crew

8.0

Overall

7.2

Food

6.4

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Crew

8.0

Overall

7.2

Food

6.4

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
British Airways
6.7
Okay
7,363 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Crew

8.0

Overall

7.2

Food

6.4

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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) is the airport you will fly out of if you book a flight from San Francisco to Belfast Intl. You should not have trouble finding flights to Belfast Intl from San Francisco; the airport handles an average of 0 outbound flights to Belfast Intl per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the San Francisco airport to Belfast Intl. It is only a 11.8 mi journey to San Francisco (SFO) from San Francisco’s city center.

  • What are the cheapest airlines flying from San Francisco to Belfast Intl Airport round-trip?

    Currently priced at $588, British Airways will fly you from San Francisco to Belfast Intl Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $635. British Airways is currently priced 35% below the average price you’ll pay for this route.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of $657). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of $1,189). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from San Francisco to Belfast Intl

Discover the top 2 airlines that operate flights from San Francisco to Belfast Intl. 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 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$588Average$766FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$845FlexibilityNo cancel feeOn-time71%

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