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$680+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BHD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from San Francisco to Belfast

Best flights from San Francisco to Belfast
Discover carefully curated flight deals from San Francisco to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:30 pmSFO - BHD
1 stop15h 05mBritish Airways
Sun 2/159:10 amBHD - SFO
1 stop17h 35mBritish Airways
Deal found 12/9$680
This Mytrip deal was found by Cheapflights users on 12/9. 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.
Sat 1/244:40 pmSFO - BFS
2 stops21h 50mMultiple Airlines
Sat 1/3111:10 pmBFS - SFO
3 stops47h 25mMultiple Airlines
Deal found 12/9$876
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Tue 5/197:30 pmSFO - BHD
1 stop14h 00mAmerican Airlines
Thu 6/186:35 amBHD - SFO
1 stop15h 15mAmerican Airlines
Deal found 12/9$941
This FlightHub deal was found by Cheapflights users on 12/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/192:46 pmSFO - BHD
2 stops20h 39mBritish Airways
Thu 6/186:35 amBHD - SFO
1 stop15h 15mBritish Airways
Deal found 12/9$716
This Expedia deal was found by Cheapflights users on 12/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/55:20 pmSFO - BHD
2 stops18h 35mMultiple Airlines
Sun 7/56:00 pmBHD - SFO
2 stops54h 20mMultiple Airlines
Deal found 12/11$1,172
This Kiwi.com deal was found by Cheapflights users on 12/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:45 pmSFO - BFS
1 stop30h 00mMultiple Airlines
Thu 6/183:25 pmBFS - SFO
2 stops30h 10mMultiple Airlines
Deal found 12/9$1,203

Find 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 December 12, 2025.

Round-trip from

$673
(Cheapflightsfares)

Popular in

June

Cheapest in

April

Average price

$1,136
From San Francisco to Belfast
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($159 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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 2/11

5:30 pm-4:35 pm

1 stop15h 05m

Belfast City

Sun 2/15

9:10 am-6:45 pm

1 stop17h 35m

$680

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 5/19

2:46 pm-7:25 pm

2 stops20h 39m

Belfast City

Thu 6/18

6:35 am-1:50 pm

1 stop15h 15m

$716

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 1/24

4:40 pm-10:30 pm

2 stops21h 50m

Belfast Intl

Sat 1/31

11:10 pm-2:35 pm

3 stops47h 25m

$876

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 5/19

7:30 pm-5:30 pm

1 stop14h 00m

Belfast City

Thu 6/18

6:35 am-1:50 pm

1 stop15h 15m

$941

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 1/5

5:20 pm-7:55 pm

2 stops18h 35m

Belfast City

Sun 7/5

6:00 pm-4:20 pm

2 stops54h 20m

$1,172

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Tue 5/19

7:45 pm-9:45 am

1 stop30h 00m

Belfast Intl

Thu 6/18

3:25 pm-1:35 pm

2 stops30h 10m

$1,203

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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, April is the cheapest month in which you can book a flight from San Francisco to Belfast (average of $587). Flying from San Francisco to Belfast in November is currently the most expensive (average of $1,032). 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 December 12, 2025.

It’s optimal to fly from San Francisco to Belfast at noon. By choosing this option you can save up to 29% 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 December 12, 2025.
Get a feel of what it's like to fly with 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.
British Airways
6.7
Okay
7,571 reviews

Boarding

6.9

Entertainment

6.4

Comfort

6.7

Crew

7.6

Overall

6.7

Food

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,571 reviews
British Airways
6.7
Okay
7,571 reviews

Boarding

6.9

Entertainment

6.4

Comfort

6.7

Crew

7.6

Overall

6.7

Food

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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 1 airline. 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 15h 05m. There are 5038 mi between San Francisco and Belfast.

  • What is the cheapest airline to fly from San Francisco to Belfast round-trip?

    Cheapflights users have booked flights from San Francisco to Belfast round-trip from $621. British Airways is 26% 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, April is the cheapest month in which you can book a flight from San Francisco to Belfast (average of $587). Flying from San Francisco to Belfast in November is currently the most expensive (average of $1,032). 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

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Top airline flying from San Francisco to Belfast

Discover the top airline 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$621Average$767FlexibilityNo cancel feeOn-time70%

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