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Belfast Intl

$421+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Jun 6 — Jun 131
Sat 6/6
Sat 6/13
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 May 7, 2026.

This Mytrip deal was found by Cheapflights users on 5/3. 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 6/36:00 am
SFO
-
BFS
2 stops29h 15m
Multiple Airlines
Mon 6/89:15 am
BFS
-
SFO
3 stops39h 50m
Multiple Airlines
Deal found 5/3$997
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sun 5/103:50 pm
SFO
-
BFS
2 stops36h 25m
Multiple Airlines
Tue 5/262:45 pm
BFS
-
SFO
1 stop38h 05m
Multiple Airlines
Deal found 5/6$1,076
This Mytrip deal was found by Cheapflights users on 5/3. 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 7/88:10 am
SFO
-
BFS
3 stops30h 10m
Multiple Airlines
Tue 7/1411:30 pm
BFS
-
SFO
3 stops30h 25m
Multiple Airlines
Deal found 5/3$1,195
This Mytrip deal was found by Cheapflights users on 5/3. 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.
Sun 6/216:00 am
SFO
-
BFS
3 stops23h 50m
Multiple Airlines
Sat 6/276:55 am
BFS
-
SFO
2 stops23h 00m
Multiple Airlines
Deal found 5/3$1,227
This Mytrip deal was found by Cheapflights users on 5/6. 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.
Sun 6/216:00 am
SFO
-
BFS
3 stops23h 50m
Multiple Airlines
Sun 6/286:45 am
BFS
-
SFO
3 stops47h 10m
Multiple Airlines
Deal found 5/6$1,254
This Mytrip deal was found by Cheapflights users on 5/2. 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.
Sat 5/165:40 pm
SFO
-
BFS
2 stops14h 55m
Multiple Airlines
Mon 5/256:30 am
BFS
-
SFO
3 stops40h 05m
Multiple Airlines
Deal found 5/2$1,292
This Mytrip deal was found by Cheapflights users on 5/3. 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 6/175:40 pm
SFO
-
BFS
2 stops20h 40m
Multiple Airlines
Wed 6/247:30 am
BFS
-
SFO
3 stops39h 00m
Multiple Airlines
Deal found 5/3$1,295

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 May 7, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$997
(Mytrip)

One-way from

$421
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$808
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. 10% potential increase in price ($105 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 7, 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

Wed 6/3

6:00 am-7:15 pm

2 stops29h 15m

Belfast Intl

Mon 6/8

9:15 am-5:05 pm

3 stops39h 50m

$997

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 7/8

5:40 pm-10:20 pm

2 stops20h 40m

Belfast Intl

Tue 7/14

11:30 pm-9:55 pm

3 stops30h 25m

$1,286

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 6/17

5:40 pm-10:20 pm

2 stops20h 40m

Belfast Intl

Wed 6/24

7:30 am-2:30 pm

3 stops39h 00m

$1,295

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 6/16

6:00 am-4:20 pm

3 stops26h 20m

Belfast Intl

Sun 6/21

10:10 pm-6:32 pm

3 stops28h 22m

$1,312
Quickest round-trip

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sun 6/21

6:00 am-1:50 pm

3 stops23h 50m

Belfast Intl

Sat 6/27

6:55 am-11:07 pm

3 stops24h 12m

$1,369

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 7/22

6:00 am-2:30 pm

3 stops24h 30m

Belfast Intl

Wed 7/29

7:30 am-4:40 pm

3 stops41h 10m

$1,369

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sun 6/21

6:00 am-6:25 pm

2 stops28h 25m

Belfast Intl

Sun 6/28

6:00 pm-4:40 pm

2 stops30h 40m

$1,461
Cheapest one-way

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 9/11

6:00 am-8:05 am

3 stops42h 05m

$421

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 6/25

6:05 pm-4:30 pm

2 stops38h 25m

$664
Quickest one-way

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 6/24

5:40 pm-10:20 pm

2 stops20h 40m

$674

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/3

Sorted by cheapest first

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 May.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on San Francisco-Belfast Intl Airport flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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

How much does it cost to fly round-trip from San Francisco to Belfast Intl Airport?

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 May 7, 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
7,949 reviews

Entertainment

6.4

Comfort

6.8

Overall

6.7

Food

6.4

Boarding

6.9

Crew

7.7

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
7,949 reviews
British Airways
6.7
Okay
7,949 reviews

Entertainment

6.4

Comfort

6.8

Overall

6.7

Food

6.4

Boarding

6.9

Crew

7.7

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 32% 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.

See more FAQs

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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.
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 May 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$586Average$843FlexibilityNo cancel feeOn-time70%

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