$564+ Cheap flights from Belfast Intl (BFS) to San Francisco (SFO)
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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
Sep 4 — Sep 111
Round-trip
1 adult, Economy
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Find cheap flights from Belfast Intl to San Francisco with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Belfast Intl to San Francisco
Cheapest
Best
Last-minute
One-way
Cheapest flights from Belfast Intl to San FranciscoExplore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
Explore the most affordable flight options available from Belfast Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
This Mytrip deal was found by Cheapflights users on 8/4. 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.
Tue 9/14:05 pm -
2 stops30h 35m
Tue 9/84:45 pm -
2 stops20h 35m
Deal found 8/4![Multiple Airlines logo]()
$954
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Fri 9/46:15 am -
3 stops43h 20m
Tue 9/88:30 am -
2 stops22h 45m
Deal found 7/31![Multiple Airlines logo]()
$1,000
This Mytrip deal was found by Cheapflights users on 8/2. 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.
Sun 8/3010:10 pm -
2 stops25h 40m
Sun 9/65:40 pm -
2 stops19h 50m
Deal found 8/2![Multiple Airlines logo]()
$1,016
This Mytrip deal was found by Cheapflights users on 8/2. 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 9/59:40 pm -
3 stops47h 10m
Sun 9/206:00 am -
2 stops25h 00m
Deal found 8/2![Multiple Airlines logo]()
$1,050
Best flights from Belfast Intl to San FranciscoDiscover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
Discover carefully curated flight deals from Belfast Intl to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
This Mytrip deal was found by Cheapflights users on 8/4. 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.
Tue 9/14:05 pm -
2 stops30h 35m
Tue 9/84:45 pm -
2 stops20h 35m
Deal found 8/4![Multiple Airlines logo]()
$954
This Mytrip deal was found by Cheapflights users on 8/2. 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.
Fri 9/46:05 am -
2 stops18h 10m
Tue 9/87:35 pm -
2 stops17h 30m
Deal found 8/2![Multiple Airlines logo]()
$1,007
This Mytrip deal was found by Cheapflights users on 8/2. 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.
Sun 8/3010:10 pm -
2 stops25h 40m
Sun 9/65:40 pm -
2 stops19h 50m
Deal found 8/2![Multiple Airlines logo]()
$1,016
This Mytrip deal was found by Cheapflights users on 8/2. 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 9/59:40 pm -
3 stops47h 10m
Sun 9/206:00 am -
2 stops25h 00m
Deal found 8/2![Multiple Airlines logo]()
$1,050
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Mon 9/218:55 pm -
2 stops27h 20m
Thu 9/248:10 pm -
1 stop18h 40m
Deal found 8/5![Multiple Airlines logo]()
$1,197
Last-minute flights from Belfast Intl to San FranciscoDiscover last-minute flight deals from Belfast Intl to San Francisco. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated August 5, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/2. 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.
Sun 8/3010:10 pm -
2 stops25h 40m
Sun 9/65:40 pm -
2 stops19h 50m
Deal found 8/2![Multiple Airlines logo]()
$1,016
This Mytrip deal was found by Cheapflights users on 8/4. 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.
Tue 9/14:05 pm -
2 stops30h 35m
Tue 9/84:45 pm -
2 stops20h 35m
Deal found 8/4![Multiple Airlines logo]()
$954
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Fri 9/46:15 am -
3 stops43h 20m
Tue 9/88:30 am -
2 stops22h 45m
Deal found 7/31![Multiple Airlines logo]()
$1,000
This Mytrip deal was found by Cheapflights users on 8/2. 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 9/59:40 pm -
3 stops47h 10m
Sun 9/206:00 am -
2 stops25h 00m
Deal found 8/2![Multiple Airlines logo]()
$1,050
One-way flights from Belfast Intl to San FranciscoSearch for one-way flight options from Belfast Intl to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
Search for one-way flight options from Belfast Intl to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Sat 12/197:50 pm -
3 stops50h 55m
Deal found 8/5![Multiple Airlines logo]()
$564
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 12/202:15 pm -
3 stops32h 30m
Deal found 8/5![Multiple Airlines logo]()
$600
Find flight deals from Belfast Intl to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to San Francisco (SFO). 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 August 5, 2026.
Most accurate provider | eDreams 2 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $954 (Mytrip) |
One-way from | $564 (Kiwi.com) |
Popular in | March |
Cheapest in | May |
Average price | $1,054 |
Cheapflights Fare Finder
Customize your flight search to find flights from Belfast Intl to San Francisco 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 August 5, 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Tue 9/1
4:05 pm-2:40 pm
2 stops30h 35m
San Francisco
Tue 9/8
4:45 pm-9:20 pm
2 stops20h 35m
$954
Quickest round-trip
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Fri 9/4
6:05 am-4:15 pm
2 stops18h 10m
San Francisco
Tue 9/8
7:35 pm-9:05 pm
2 stops17h 30m
$1,007
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Sun 8/30
10:10 pm-3:50 pm
2 stops25h 40m
San Francisco
Sun 9/6
5:40 pm-9:30 pm
2 stops19h 50m
$1,016
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Sat 9/5
9:40 pm-12:50 pm
3 stops47h 10m
San Francisco
Sun 9/20
6:00 am-3:00 pm
2 stops25h 00m
$1,050
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Mon 9/21
8:55 pm-4:15 pm
2 stops27h 20m
San Francisco
Thu 9/24
8:10 pm-10:50 pm
1 stop18h 40m
$1,197
Cheapest one-way
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Sat 12/19
7:50 pm-2:45 pm
3 stops50h 55m
$564
Quickest one-way
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Sun 12/20
8:00 pm-2:45 pm
2 stops26h 45m
$722
Sorted by cheapest first
Compare providers for flights from Belfast Intl to San Francisco
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 Belfast Intl to San Francisco in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Belfast Intl Airport-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Belfast Intl Airport-San Francisco flight deals on Cheapflights vs. eDreams 90-95% of the time. Price accuracy is based on data collected from Belfast Intl Airport-San Francisco flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Belfast Intl Airport-San Francisco flights, Cheapflights users trust eDreams the most. eDreams 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 Belfast Intl Airport-San Francisco 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 Belfast Intl to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast Intl with our price prediction graph.
BFS-SFO
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.
Related info for your journey
Find useful and relevant information for your journey from Belfast Intl to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Francisco?
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