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$630+ Cheap flights from San Francisco (SFO) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BHD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$630
(American Airlines)

Popular in

January

Cheapest in

October

Average price

$1,150
From San Francisco to Belfast
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/9. 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.
Wed 10/87:20 pmSFO - BHD
1 stop17h 25mAmerican Airlines
Tue 10/146:35 amBHD - SFO
1 stop15h 15mAmerican Airlines
Deal found 6/9$630
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/168:58 amSFO - BHD
2 stops17h 37mBritish Airways
Tue 9/309:35 amBHD - SFO
2 stops21h 58mBritish Airways
Deal found 6/11$717
This Trip.com deal was found by Cheapflights users on 6/9. 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.
Wed 10/84:30 pmSFO - BFS
1 stop22h 40mMultiple Airlines
Tue 10/146:45 amBFS - SFO
1 stop18h 40mMultiple Airlines
Deal found 6/9$756
This Mytrip deal was found by Cheapflights users on 6/9. 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 10/810:15 amSFO - BHD
3 stops26h 55mMultiple Airlines
Tue 10/147:05 amBHD - SFO
3 stops41h 58mMultiple Airlines
Deal found 6/9$930
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:45 pmSFO - BHD
2 stops18h 10mAer Lingus
Thu 10/96:50 pmBHD - SFO
2 stops29h 05mAer Lingus
Deal found 6/10$1,192
This KLM deal was found by Cheapflights users on 6/9. 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 10/71:45 pmSFO - BHD
1 stop23h 30mKLM
Fri 10/245:25 pmBHD - SFO
1 stop26h 20mKLM
Deal found 6/9$4,553
This AranGrant deal was found by Cheapflights users on 6/9. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:20 pmSFO - BHD
2 stops20h 10mIberia
Fri 10/246:35 amBHD - SFO
1 stop15h 15mIberia
Deal found 6/9$4,662

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 June 12, 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

Wed 10/8

7:20 pm-8:45 pm

1 stop17h 25m

Belfast City

Tue 10/14

6:35 am-1:50 pm

1 stop15h 15m

$630

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 9/16

8:58 am-10:35 am

2 stops17h 37m

Belfast City

Tue 9/30

9:35 am-11:33 pm

2 stops21h 58m

$717

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Wed 10/8

4:30 pm-11:10 pm

1 stop22h 40m

Belfast Intl

Tue 10/14

6:45 am-5:25 pm

1 stop18h 40m

$756

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/8

10:15 am-9:10 pm

3 stops26h 55m

Belfast City

Tue 10/14

7:05 am-5:03 pm

3 stops41h 58m

$930

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 10/6

5:45 pm-7:55 pm

2 stops18h 10m

Belfast City

Thu 10/9

6:50 pm-3:55 pm

2 stops29h 05m

$1,192

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 10/7

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

Fri 10/24

5:25 pm-11:45 am

1 stop26h 20m

$4,553

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 10/7

1:20 pm-5:30 pm

2 stops20h 10m

Belfast City

Fri 10/24

6:35 am-1:50 pm

1 stop15h 15m

$4,662

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 7/2

1:25 pm-9:15 am

3 stops59h 50m

$1,776

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 7/2

4:35 pm-3:35 pm

1 stop15h 00m

$2,210

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 7/1

1:45 pm-4:55 pm

1 stop19h 10m

$4,882

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 results
1
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 June 12, 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.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 June 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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.
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,117 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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 $630. Other airlines that can offer you cheap pricing are British Airways, from $717, and Aer Lingus, from $1,192. American Airlines is 31% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from San Francisco to Belfast one-way?

    $2,210 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Air France and KLM, with prices starting from $4,882 and $4,886, respectively.

  • 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$493Average$827FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$588Average$812FlexibilityNo cancel feeOn-time70%

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