$904+ Cheap flights from Belfast Intl (BFS) to San Francisco (SFO)
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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SFO
Sep 12 — Sep 191
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
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 13, 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 13, 2026.
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Wed 9/94:35 pm -
2 stops30h 05m
Tue 9/154:45 pm -
2 stops22h 15m
Deal found 8/10![Multiple Airlines logo]()
$904
This Mytrip deal was found by Cheapflights users on 8/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:10 pm -
2 stops32h 39m
Sun 9/278:10 am -
3 stops29h 45m
Deal found 8/8![Multiple Airlines logo]()
$938
This Mytrip deal was found by Cheapflights users on 8/12. 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 9/266:20 am -
3 stops37h 55m
Sat 10/38:10 am -
3 stops29h 20m
Deal found 8/12![Multiple Airlines logo]()
$1,008
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Mon 9/78:55 pm -
2 stops22h 50m
Mon 9/143:05 pm -
2 stops20h 15m
Deal found 8/10![Multiple Airlines logo]()
$1,026
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 13, 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 13, 2026.
This Mytrip deal was found by Cheapflights users on 8/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:10 pm -
2 stops32h 39m
Sun 9/278:10 am -
3 stops29h 45m
Deal found 8/8![Multiple Airlines logo]()
$938
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Mon 9/78:55 pm -
2 stops22h 50m
Mon 9/143:05 pm -
2 stops20h 15m
Deal found 8/10![Multiple Airlines logo]()
$1,026
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Wed 9/96:15 am -
3 stops36h 05m
Tue 9/158:30 am -
2 stops22h 45m
Deal found 8/10![Multiple Airlines logo]()
$1,036
This Mytrip deal was found by Cheapflights users on 8/12. 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 9/116:05 am -
3 stops38h 10m
Thu 9/178:30 am -
2 stops26h 25m
Deal found 8/12![Multiple Airlines logo]()
$1,115
This Mytrip deal was found by Cheapflights users on 8/9. 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.
Fri 9/188:15 pm -
2 stops33h 34m
Sun 9/278:10 am -
3 stops29h 45m
Deal found 8/9![Multiple Airlines logo]()
$1,134
This Mytrip deal was found by Cheapflights users on 8/10. 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 9/106:10 am -
2 stops23h 39m
Thu 9/178:30 am -
2 stops26h 25m
Deal found 8/10![Multiple Airlines logo]()
$1,150
This Mytrip deal was found by Cheapflights users on 8/10. 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 9/249:10 pm -
3 stops46h 50m
Thu 10/18:30 am -
2 stops19h 20m
Deal found 8/10![Multiple Airlines logo]()
$1,181
Last-minute flights from Belfast Intl to San FranciscoDiscover last-minute flight deals from Belfast Intl to San Francisco. Data last updated August 13, 2026 and is based on user searches.
Discover last-minute flight deals from Belfast Intl to San Francisco. Data last updated August 13, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Mon 9/78:55 pm -
2 stops22h 50m
Mon 9/143:05 pm -
2 stops20h 15m
Deal found 8/10![Multiple Airlines logo]()
$1,026
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Wed 9/94:35 pm -
2 stops30h 05m
Tue 9/154:45 pm -
2 stops22h 15m
Deal found 8/10![Multiple Airlines logo]()
$904
This Mytrip deal was found by Cheapflights users on 8/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:10 pm -
2 stops32h 39m
Sun 9/278:10 am -
3 stops29h 45m
Deal found 8/8![Multiple Airlines logo]()
$938
This Mytrip deal was found by Cheapflights users on 8/12. 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 9/266:20 am -
3 stops37h 55m
Sat 10/38:10 am -
3 stops29h 20m
Deal found 8/12![Multiple Airlines logo]()
$1,008
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 13, 2026.
Most accurate provider | eDreams 2 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $904 (Mytrip) |
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 13, 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
Sun 9/20
9:10 pm-9:49 pm
2 stops32h 39m
San Francisco
Sun 9/27
8:10 am-9:55 pm
3 stops29h 45m
$938
Quickest round-trip
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Mon 9/7
8:55 pm-11:45 am
2 stops22h 50m
San Francisco
Mon 9/14
3:05 pm-7:20 pm
2 stops20h 15m
$1,026
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Wed 9/9
6:15 am-10:20 am
3 stops36h 05m
San Francisco
Tue 9/15
8:30 am-3:15 pm
2 stops22h 45m
$1,036
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Fri 9/11
6:05 am-12:15 pm
3 stops38h 10m
San Francisco
Thu 9/17
8:30 am-6:55 pm
2 stops26h 25m
$1,115
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Fri 9/18
8:15 pm-9:49 pm
2 stops33h 34m
San Francisco
Sun 9/27
8:10 am-9:55 pm
3 stops29h 45m
$1,134
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Thu 9/10
6:10 am-9:49 pm
2 stops23h 39m
San Francisco
Thu 9/17
8:30 am-6:55 pm
2 stops26h 25m
$1,150
BelfastSan Francisco
BFS Belfast Intl - SFO San Francisco
BFSSFO
Belfast Intl
Thu 9/24
9:10 pm-12:00 pm
3 stops46h 50m
San Francisco
Thu 10/1
8:30 am-11:50 am
2 stops19h 20m
$1,181
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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