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$436+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BHD
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
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 julio 29, 2025.

Round-trip from

$747
(American Airlines)

One-way from

$436
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$1,167
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. 14% potential increase in price ($155 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 July 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 julio 29, 2025.

This British Airways deal was found by Cheapflights users on 7/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/235:30 pmSFO - BHD
1 stop17h 10mBritish Airways
mar. 12/27:25 pmBHD - SFO
1 stop27h 35mBritish Airways
Deal found 7/29$630
This American Airlines deal was found by Cheapflights users on 7/27. 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.
jue. 8/288:00 amSFO - BHD
2 stops17h 20mAmerican Airlines
jue. 9/1112:40 pmBHD - SFO
2 stops18h 36mAmerican Airlines
Deal found 7/27$747
This Delta deal was found by Cheapflights users on 7/27. 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.
mié. 12/31:55 pmSFO - BHD
1 stop23h 05mDelta
dom. 12/76:30 amBHD - SFO
2 stops20h 55mDelta
Deal found 7/27$748
This KLM deal was found by Cheapflights users on 7/28. 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.
jue. 7/311:45 pmSFO - BHD
1 stop23h 20mKLM
jue. 8/76:30 amBHD - SFO
2 stops18h 54mKLM
Deal found 7/28$903
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
lun. 8/257:20 pmSFO - BHD
1 stop16h 15mMultiple Airlines
jue. 8/287:05 amBHD - SFO
2 stops35h 35mMultiple Airlines
Deal found 7/28$962
This Ovago deal was found by Cheapflights users on 7/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/228:40 pmSFO - BHD
1 stop15h 00mAer Lingus
dom. 11/305:55 pmBHD - SFO
2 stops29h 40mAer Lingus
Deal found 7/29$1,057
This Trip.com deal was found by Cheapflights users on 7/27. 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.
jue. 8/284:00 pmSFO - BFS
1 stop17h 50mMultiple Airlines
jue. 9/119:00 amBFS - SFO
1 stop18h 15mMultiple Airlines
Deal found 7/27$1,085

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 julio 29, 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

jue. 8/28

8:00 am-9:20 am

2 stops17h 20m

Belfast City

jue. 9/11

12:40 pm-11:16 pm

2 stops18h 36m

$747

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

jue. 8/28

6:28 am-9:20 am

2 stops18h 52m

Belfast City

jue. 9/11

6:35 am-7:15 pm

2 stops20h 40m

$882

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

vie. 8/1

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

lun. 8/4

6:30 am-6:46 pm

2 stops20h 16m

$902

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

lun. 8/25

7:20 pm-7:35 pm

1 stop16h 15m

Belfast City

jue. 8/28

7:05 am-10:40 am

2 stops35h 35m

$962

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

jue. 8/28

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

jue. 9/11

6:30 am-11:45 am

1 stop13h 15m

$1,076

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

jue. 8/28

4:00 pm-5:50 pm

1 stop17h 50m

Belfast Intl

jue. 9/11

9:00 am-7:15 pm

1 stop18h 15m

$1,085

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

lun. 8/25

5:40 pm-7:55 pm

2 stops18h 15m

Belfast City

jue. 8/28

6:50 pm-3:50 pm

2 stops29h 00m

$1,249

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

jue. 8/7

7:25 pm-9:50 am

3 stops30h 25m

$436

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

jue. 8/7

11:20 am-9:00 am

2 stops37h 40m

$444

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

jue. 8/7

1:45 pm-9:05 pm

1 stop23h 20m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 11 results
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2

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 julio 29, 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.

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 julio 29, 2025.
Get a feel of what it's like to fly with Delta, KLM, and American Airlines 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.
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.1
Good
1,190 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
7,208 reviews
Delta
8.0
Very good
7,977 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 $747. Other airlines that can offer you cheap pricing are British Airways, from $882, and Delta, from $902. American Airlines is 17% 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$588Average$754FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$635Average$840FlexibilityNo cancel feeOn-time71%

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