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Belfast Intl

$367+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
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 March 24, 2026.

This Mytrip deal was found by Cheapflights users on 3/21. 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.
Tue 5/512:55 pm
SFO
-
BFS
2 stops26h 25m
Multiple Airlines
Tue 5/128:15 pm
BFS
-
SFO
2 stops28h 25m
Multiple Airlines
Deal found 3/21$867
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:40 pm
SFO
-
BFS
2 stops19h 40m
Multiple Airlines
Thu 9/178:05 pm
BFS
-
SFO
1 stop32h 45m
Multiple Airlines
Deal found 3/19$981
This Mytrip deal was found by Cheapflights users on 3/21. 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.
Tue 6/26:00 am
SFO
-
BFS
3 stops26h 20m
Multiple Airlines
Tue 6/1611:30 pm
BFS
-
SFO
3 stops47h 00m
Multiple Airlines
Deal found 3/21$987
This Mytrip deal was found by Cheapflights users on 3/22. 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.
Tue 8/48:30 am
SFO
-
BFS
2 stops22h 45m
Multiple Airlines
Tue 8/187:35 am
BFS
-
SFO
3 stops39h 00m
Multiple Airlines
Deal found 3/22$1,055
This Mytrip deal was found by Cheapflights users on 3/21. 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 6/16:00 am
SFO
-
BFS
2 stops29h 05m
Multiple Airlines
Mon 6/89:55 pm
BFS
-
SFO
2 stops26h 00m
Multiple Airlines
Deal found 3/21$1,247
This Mytrip deal was found by Cheapflights users on 3/22. 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.
Sat 7/118:30 am
SFO
-
BFS
2 stops17h 05m
Multiple Airlines
Sun 7/267:10 am
BFS
-
SFO
3 stops36h 50m
Multiple Airlines
Deal found 3/22$1,252
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:30 pm
SFO
-
BFS
1 stop17h 45m
Multiple Airlines
Sat 9/198:55 am
BFS
-
SFO
2 stops35h 45m
Multiple Airlines
Deal found 3/21$1,253

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 March 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$867
(Mytrip)

One-way from

$367
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$866
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. 15% potential increase in price ($151 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 March 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 March 24, 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 round-trip

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/5

12:55 pm-11:20 pm

2 stops26h 25m

Belfast Intl

Tue 5/12

8:15 pm-4:40 pm

2 stops28h 25m

$867

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 9/8

5:40 pm-9:20 pm

2 stops19h 40m

Belfast Intl

Thu 9/17

8:05 pm-8:50 pm

1 stop32h 45m

$981

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 8/4

8:30 am-3:15 pm

2 stops22h 45m

Belfast Intl

Tue 8/18

7:35 am-2:35 pm

3 stops39h 00m

$1,055

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 6/2

11:45 am-4:20 pm

2 stops20h 35m

Belfast Intl

Tue 6/16

5:10 pm-2:35 pm

2 stops29h 25m

$1,169

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 6/1

6:00 am-7:05 pm

2 stops29h 05m

Belfast Intl

Mon 6/8

9:55 pm-3:55 pm

2 stops26h 00m

$1,247

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 7/11

8:30 am-8:40 pm

3 stops28h 10m

Belfast Intl

Sun 7/26

7:10 am-12:00 pm

3 stops36h 50m

$1,262

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 5/23

8:30 am-8:40 pm

3 stops28h 10m

Belfast Intl

Mon 6/15

9:25 pm-9:10 pm

2 stops31h 45m

$1,449
Quickest round-trip

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 5/21

6:30 am-11:50 am

3 stops21h 20m

Belfast Intl

Mon 6/8

9:55 pm-3:55 pm

2 stops26h 00m

$1,691
Cheapest one-way

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 9/1

5:40 pm-3:20 pm

2 stops37h 40m

$367

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 4/20

6:00 am-7:05 am

3 stops41h 05m

$386

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 March 24, 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
7,813 reviews

Food

6.4

Entertainment

6.4

Crew

7.6

Overall

6.7

Comfort

6.8

Boarding

6.9

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,813 reviews
British Airways
6.7
Okay
7,813 reviews

Food

6.4

Entertainment

6.4

Crew

7.6

Overall

6.7

Comfort

6.8

Boarding

6.9

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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 11.0 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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Alternative routes for San Francisco to Belfast Intl

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Los Angeles to Belfast Intl flights

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 March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$586Average$776FlexibilityNo cancel feeOn-time70%

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