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Belfast Intl

$379+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap 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 February 4, 2026.

This Mytrip deal was found by Cheapflights users on 2/2. 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 3/198:30 am
SFO
-
BFS
3 stops28h 55m
Multiple Airlines
Thu 3/267:05 am
BFS
-
SFO
2 stops20h 30m
Multiple Airlines
Deal found 2/2$926
This Mytrip deal was found by Cheapflights users on 2/3. 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.
Wed 7/295:35 pm
SFO
-
BFS
2 stops20h 45m
Multiple Airlines
Thu 8/276:10 am
BFS
-
SFO
3 stops41h 40m
Multiple Airlines
Deal found 2/3$1,050
This Mytrip deal was found by Cheapflights users on 2/3. 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.
Fri 5/155:35 pm
SFO
-
BFS
2 stops19h 40m
Multiple Airlines
Mon 5/258:55 am
BFS
-
SFO
3 stops37h 40m
Multiple Airlines
Deal found 2/3$1,128
This Mytrip deal was found by Cheapflights users on 2/3. 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.
Wed 6/108:30 am
SFO
-
BFS
2 stops26h 45m
Multiple Airlines
Sat 6/206:55 am
BFS
-
SFO
3 stops38h 55m
Multiple Airlines
Deal found 2/3$1,232
This Mytrip deal was found by Cheapflights users on 2/2. 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 7/138:10 am
SFO
-
BFS
3 stops28h 45m
Multiple Airlines
Fri 7/316:40 pm
BFS
-
SFO
2 stops30h 55m
Multiple Airlines
Deal found 2/2$1,269

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$866
(Kiwi.com)

One-way from

$379
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$704
Provider with most accurate pricing for San Francisco-Belfast Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Belfast Intl flights.
Search Deals
From San Francisco to Belfast Intl
Search Deals
One-way flight from San Francisco to Belfast Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 4, 2026.
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 3/19

8:30 am-8:25 pm

3 stops28h 55m

Belfast Intl

Thu 3/26

7:05 am-8:35 pm

2 stops20h 30m

$926

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 7/29

5:35 pm-10:20 pm

2 stops20h 45m

Belfast Intl

Thu 8/27

6:10 am-3:50 pm

3 stops41h 40m

$1,050

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 5/15

5:35 pm-9:15 pm

2 stops19h 40m

Belfast Intl

Mon 5/25

8:55 am-2:35 pm

3 stops37h 40m

$1,128

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 6/10

8:30 am-7:15 pm

2 stops26h 45m

Belfast Intl

Sat 6/20

6:55 am-1:50 pm

3 stops38h 55m

$1,232

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 7/13

8:10 am-8:55 pm

3 stops28h 45m

Belfast Intl

Fri 7/31

6:40 pm-5:35 pm

2 stops30h 55m

$1,269

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 3/19

8:55 pm-3:10 pm

2 stops35h 15m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Compare providers for flights from San Francisco to Belfast Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Belfast Intl in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Francisco-Belfast Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Belfast Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Belfast Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Belfast Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Belfast Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, April is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of $587). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of $1,213). 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.

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 February 4, 2026.
See what other customers who have flown with 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.
British Airways
6.7
Okay
7,715 reviews

Crew

7.6

Entertainment

6.4

Food

6.4

Comfort

6.8

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,715 reviews
British Airways
6.7
Okay
7,715 reviews

Crew

7.6

Entertainment

6.4

Food

6.4

Comfort

6.8

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

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 1 airline has 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 is the cheapest airline to fly from San Francisco to Belfast Intl Airport round-trip?

    Currently priced at $586, 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. British Airways is currently priced 28% 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, April is the cheapest month in which you can book a flight from San Francisco to Belfast Intl Airport (average of $587). Flying from San Francisco to Belfast Intl Airport in June is currently the most expensive (average of $1,213). 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

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Top airline flying from San Francisco to Belfast Intl

Discover the top airline 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$586Average$766FlexibilityNo cancel feeOn-time70%

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