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$338+ Cheap flights from San Francisco (SFO) to Belfast

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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BHD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from San Francisco to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Belfast (BF1). 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 11, 2025.

Round-trip from

$632
(Delta)

One-way from

$338
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$885
From San Francisco to Belfast
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One-way flight from San Francisco to Belfast
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Highest demand for flights based on searches. 15% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 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

Cheapest flights from San Francisco to Belfast
Explore the most affordable flight options available from San Francisco to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:45 pmSFO - BHD
1 stop19h 10mDelta
Fri 10/316:30 amBHD - SFO
1 stop13h 20mDelta
Deal found 9/10$632
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:30 amSFO - BHD
2 stops22h 25mDelta
Wed 10/295:20 pmBHD - SFO
1 stop26h 30mDelta
Deal found 9/10$636
This KLM deal was found by Cheapflights users on 9/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:45 pmSFO - BHD
1 stop23h 30mKLM
Wed 10/16:30 amBHD - SFO
2 stops17h 30mKLM
Deal found 9/10$642
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:30 amSFO - BHD
2 stops22h 25mDelta
Thu 10/305:20 pmBHD - SFO
2 stops29h 39mDelta
Deal found 9/10$646
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/169:16 amSFO - BHD
2 stops17h 54mAmerican Airlines
Wed 10/2211:30 amBHD - SFO
2 stops18h 13mAmerican Airlines
Deal found 9/10$649
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:41 pmSFO - BHD
2 stops18h 34mAmerican Airlines
Fri 10/316:45 amBHD - SFO
2 stops19h 23mAmerican Airlines
Deal found 9/10$674
This Virgin Atlantic deal was found by Cheapflights users on 9/8. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:55 pmSFO - BHD
1 stop23h 05mVirgin Atlantic
Sun 12/75:20 pmBHD - SFO
1 stop26h 30mVirgin Atlantic
Deal found 9/8$680
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:45 pmSFO - BHD
1 stop19h 10mDelta
Sat 11/16:30 amBHD - SFO
1 stop13h 20mDelta
Deal found 9/10$682
This Air France deal was found by Cheapflights users on 9/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/161:45 pmSFO - BHD
2 stops19h 10mMultiple Airlines
Thu 10/305:20 pmBHD - SFO
1 stop26h 30mMultiple Airlines
Deal found 9/10$686
This Delta deal was found by Cheapflights users on 9/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:00 pmSFO - BHD
2 stops18h 50mDelta
Sun 12/76:30 amBHD - SFO
2 stops17h 27mDelta
Deal found 9/8$695
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Thu 10/912:35 pmSFO - BFS
2 stops26h 50mMultiple Airlines
Thu 10/166:35 amBFS - SFO
1 stop20h 55mMultiple Airlines
Deal found 9/11$696
This Mytrip deal was found by Cheapflights users on 9/10. 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 10/1610:15 amSFO - BFS
3 stops19h 50mMultiple Airlines
Wed 10/227:25 amBFS - SFO
3 stops39h 05mMultiple Airlines
Deal found 9/10$807

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Belfast 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 11, 2025.
Use the filters below to find and compare flights from San Francisco to Belfast that are best for you.

Fly from

San Francisco

Fly to

Belfast

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/19

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

Fri 10/31

6:30 am-12:50 pm

1 stop13h 20m

$632

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/19

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

Wed 10/29

6:30 am-12:50 pm

1 stop13h 20m

$632

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

12:35 pm-4:55 pm

2 stops20h 20m

Belfast City

Fri 10/31

6:30 am-12:50 pm

1 stop13h 20m

$636

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

10:30 am-4:55 pm

2 stops22h 25m

Belfast City

Wed 10/29

5:20 pm-12:50 pm

1 stop26h 30m

$636

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

1:45 pm-9:15 pm

2 stops23h 30m

Belfast City

Thu 10/30

6:30 am-12:50 pm

1 stop13h 20m

$636

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/19

8:20 am-4:55 pm

2 stops24h 35m

Belfast City

Thu 10/30

6:30 am-12:50 pm

1 stop13h 20m

$636

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 9/23

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

Wed 10/1

6:30 am-4:00 pm

2 stops17h 30m

$642

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 9/23

1:45 pm-9:15 pm

2 stops23h 30m

Belfast City

Wed 10/1

6:30 am-5:47 pm

2 stops19h 17m

$646

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Thu 10/16

9:16 am-11:10 am

2 stops17h 54m

Belfast City

Wed 10/22

11:30 am-9:43 pm

2 stops18h 13m

$649

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 10/17

3:48 pm-6:15 pm

2 stops18h 27m

Belfast City

Thu 10/23

1:15 pm-12:17 am

2 stops19h 02m

$649

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 29 results
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2
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Best time to book a flight from San Francisco to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to Belfast (average of $657). Flying from San Francisco to Belfast 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. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from San Francisco to Belfast 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.

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

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. 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. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with American Airlines and British Airways from San Francisco to Belfast by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Entertainment

6.9

Comfort

7.2

Food

6.4

Crew

8.0

Overall

7.2

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

Entertainment

6.9

Comfort

7.2

Food

6.4

Crew

8.0

Overall

7.2

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
7,361 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Entertainment

6.9

Comfort

7.2

Food

6.4

Crew

8.0

Overall

7.2

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. 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?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Belfast. On average, San Francisco has 0 outbound flights to Belfast per day from 2 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

  • How long is the flight from San Francisco to Belfast?

    Departing from San Francisco to Belfast will take you 23h 30m. There are 5038 mi between San Francisco and Belfast.

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

    Cheapflights users have booked flights from San Francisco to Belfast round-trip from $588. Another airline that can offer you cheap pricing is American Airlines. British Airways is 34% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

    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.

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

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

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Belfast (average of $657). Flying from San Francisco to Belfast 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from San Francisco to Belfast

Discover the top 2 airlines that operate flights from San Francisco to Belfast. 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$588Average$752FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$827FlexibilityNo cancel feeOn-time71%

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