$475+ Cheap flights from Belfast 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SFO
May 1 — May 81
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Belfast 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 to San Francisco
Cheapest
Best
Last-minute
One-way
Cheapest flights from Belfast to San FranciscoExplore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.
Explore the most affordable flight options available from Belfast to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.
This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:30 am
BHD
- SFO
1 stop15h 20m
British Airways
Sun 9/69:49 pm
SFO
- BHD
2 stops27h 01m
British Airways
Deal found 3/31![British Airways logo]()
$823
This British Airways deal was found by Cheapflights users on 3/30. 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.
Tue 7/286:30 am
BHD
- SFO
1 stop15h 20m
British Airways
Tue 8/184:35 pm
SFO
- BHD
1 stop14h 45m
British Airways
Deal found 3/30![British Airways logo]()
$825
This American Airlines deal was found by Cheapflights users on 3/30. 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 7/2911:35 am
BHD
- SFO
2 stops21h 23m
American Airlines
Tue 8/1810:16 am
SFO
- BHD
2 stops21h 04m
American Airlines
Deal found 3/30![American Airlines logo]()
$827
This British Airways deal was found by Cheapflights users on 3/30. 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.
Mon 7/276:30 am
BHD
- SFO
2 stops23h 58m
British Airways
Mon 8/174:35 pm
SFO
- BHD
1 stop16h 55m
British Airways
Deal found 3/30![British Airways logo]()
$829
This TravelUp deal was found by Cheapflights users on 3/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:30 am
BHD
- SFO
1 stop19h 10m
Multiple Airlines
Fri 5/14:15 pm
SFO
- BHD
2 stops17h 55m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$843
This British Airways deal was found by Cheapflights users on 3/30. 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.
Mon 7/276:30 pm
BHD
- SFO
1 stop27h 20m
British Airways
Fri 8/144:35 pm
SFO
- BHD
1 stop17h 35m
British Airways
Deal found 3/30![British Airways logo]()
$865
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:55 pm
BFS
- SFO
2 stops48h 05m
Multiple Airlines
Fri 5/111:15 pm
SFO
- BFS
1 stop28h 40m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$1,044
This Mytrip deal was found by Cheapflights users on 3/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:25 pm
BFS
- SFO
2 stops33h 25m
Multiple Airlines
Mon 4/203:05 pm
SFO
- BFS
2 stops21h 20m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,223
Best flights from Belfast to San FranciscoDiscover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2026.
Discover carefully curated flight deals from Belfast to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2026.
This TravelUp deal was found by Cheapflights users on 3/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:30 am
BHD
- SFO
1 stop19h 10m
Multiple Airlines
Fri 5/14:15 pm
SFO
- BHD
2 stops17h 55m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$843
This British Airways deal was found by Cheapflights users on 3/29. 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.
Wed 9/210:05 am
BHD
- SFO
2 stops19h 28m
British Airways
Sun 9/69:49 pm
SFO
- BHD
2 stops27h 01m
British Airways
Deal found 3/29![British Airways logo]()
$861
This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:45 pm
BHD
- SFO
1 stop33h 05m
British Airways
Mon 9/144:35 pm
SFO
- BHD
1 stop16h 55m
British Airways
Deal found 3/31![British Airways logo]()
$863
This British Airways deal was found by Cheapflights users on 3/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:20 pm
BHD
- SFO
1 stop31h 30m
British Airways
Mon 9/76:30 am
SFO
- BHD
2 stops28h 55m
British Airways
Deal found 3/27![British Airways logo]()
$898
This Mytrip deal was found by Cheapflights users on 3/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:05 am
BFS
- SFO
3 stops40h 30m
Multiple Airlines
Fri 5/18:30 am
SFO
- BFS
3 stops28h 45m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$1,187
This Mytrip deal was found by Cheapflights users on 3/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:25 pm
BFS
- SFO
2 stops33h 25m
Multiple Airlines
Mon 4/203:05 pm
SFO
- BFS
2 stops21h 20m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,223
Last-minute flights from Belfast to San FranciscoDiscover last-minute flight deals from Belfast to San Francisco. Data last updated April 1, 2026 and is based on user searches.
Discover last-minute flight deals from Belfast to San Francisco. Data last updated April 1, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/30. 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 4/110:05 am
BHD
- SFO
2 stops21h 45m
American Airlines
Mon 4/612:46 pm
SFO
- BHD
2 stops18h 44m
American Airlines
Deal found 3/30![American Airlines logo]()
$1,218
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Thu 4/212:45 pm
BHD
- SFO
2 stops20h 03m
American Airlines
Tue 4/74:15 pm
SFO
- BHD
2 stops19h 25m
American Airlines
Deal found 3/30![American Airlines logo]()
$1,189
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Thu 4/29:35 am
BHD
- SFO
2 stops23h 13m
American Airlines
Sun 4/53:58 pm
SFO
- BHD
2 stops18h 47m
American Airlines
Deal found 3/30![American Airlines logo]()
$1,229
This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:30 am
BHD
- SFO
1 stop15h 20m
British Airways
Mon 4/207:30 pm
SFO
- BHD
1 stop15h 55m
British Airways
Deal found 3/31![British Airways logo]()
$998
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:50 am
BHD
- SFO
2 stops21h 22m
Delta
Mon 4/2010:32 am
SFO
- BHD
2 stops22h 23m
Delta
Deal found 3/31![Delta logo]()
$1,073
This Mytrip deal was found by Cheapflights users on 3/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:25 pm
BFS
- SFO
2 stops33h 25m
Multiple Airlines
Mon 4/203:05 pm
SFO
- BFS
2 stops21h 20m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$1,223
This TravelUp deal was found by Cheapflights users on 3/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:30 am
BHD
- SFO
1 stop19h 10m
Multiple Airlines
Fri 5/14:15 pm
SFO
- BHD
2 stops17h 55m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$843
This BusinessClass deal was found by Cheapflights users on 3/27. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:30 am
BHD
- SFO
1 stop19h 10m
British Airways
Fri 5/110:16 pm
SFO
- BHD
2 stops26h 39m
British Airways
Deal found 3/27![British Airways logo]()
$951
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:55 pm
BFS
- SFO
2 stops48h 05m
Multiple Airlines
Fri 5/111:15 pm
SFO
- BFS
1 stop28h 40m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$1,044
One-way flights from Belfast to San FranciscoSearch for one-way flight options from Belfast to San Francisco. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
Search for one-way flight options from Belfast to San Francisco. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:45 pm
BFS
- SFO
3 stops50h 50m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$475
This British Airways deal was found by Cheapflights users on 3/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:30 am
BHD
- SFO
1 stop19h 10m
British Airways
Deal found 3/27![British Airways logo]()
$641
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:25 pm
BHD
- SFO
3 stops31h 05m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$667
Find flight deals from Belfast to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) 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 April 1, 2026.
Round-trip from | $823 (British Airways) |
|---|---|
One-way from | $475 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $654 |
Cheapflights Fare Finder
Customize your flight search to find flights from Belfast 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 April 1, 2026.
Use the filters below to find and compare flights from Belfast to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Fri 4/24
6:30 am-5:40 pm
1 stop19h 10m
San Francisco
Fri 5/1
4:15 pm-6:10 pm
2 stops17h 55m
$843
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Wed 9/2
10:05 am-9:33 pm
2 stops19h 28m
San Francisco
Sun 9/6
9:49 pm-8:50 am
2 stops27h 01m
$861
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Thu 9/10
12:45 pm-1:50 pm
1 stop33h 05m
San Francisco
Mon 9/14
4:35 pm-5:30 pm
1 stop16h 55m
$863
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Thu 9/3
2:20 pm-1:50 pm
1 stop31h 30m
San Francisco
Mon 9/7
6:30 am-7:25 pm
2 stops28h 55m
$898
BelfastSan Francisco
BFS - SFO
BFSSFO
Belfast Intl
Fri 4/24
9:05 am-5:35 pm
3 stops40h 30m
San Francisco
Fri 5/1
8:30 am-9:15 pm
3 stops28h 45m
$1,187
BelfastSan Francisco
BFS - SFO
BFSSFO
Belfast Intl
Thu 4/16
3:25 pm-4:50 pm
2 stops33h 25m
San Francisco
Mon 4/20
3:05 pm-8:25 pm
2 stops21h 20m
$1,223
Cheapest one-way
BelfastSan Francisco
BFS - SFO
BFSSFO
Belfast Intl
Thu 9/3
10:45 pm-5:35 pm
3 stops50h 50m
$475
Quickest one-way
BelfastSan Francisco
BHD - SFO
BHDSFO
Belfast City
Thu 9/3
6:30 am-5:40 pm
1 stop19h 10m
$641
Sorted by cheapest first
Best time to book a flight from Belfast to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Belfast with our price prediction graph.
BF1-SFO
BHD-SFO
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.
Cheapflights Insights
Everything you need to know about your flight from Belfast to San Francisco
BF1-SFO
BHD-SFO
BFS-SFO
How much does it cost to fly round-trip from Belfast to San Francisco?
Reviews of airlines servicing San Francisco
Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated April 1, 2026.
Read reviews from past customers who have flown British Airways from Belfast to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
6.8
Food
6.4
Overall
6.7
Boarding
6.9
Crew
7.6
Entertainment
6.4
Reviews
1 / 20
6.0
GoodRoxanne,Sep 2025
LHR - IAD
Comfort
6.8
Food
6.4
Overall
6.7
Boarding
6.9
Crew
7.6
Entertainment
6.4
Reviews
1 / 20
6.0
GoodRoxanne,Sep 2025
LHR - IAD
Related info for your journey
Find useful and relevant information for your journey from Belfast 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?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Cruz
Santa Clara
Livermore
Roseville
Rancho Cordova
San Bruno
Watsonville
San Ramon
Sunnyvale
Vacaville
San Carlos
Redwood City
Turlock
San Lorenzo
Davis
Manteca
Union City
Elk Grove
Foster City
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
San Francisco flight routes
Alternative routes for Belfast to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Belfast to San Francisco by cabin class
Find flights from Belfast to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Belfast and San Francisco flights
Browse other Belfast and San Francisco flight options. Last updated on April 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 1, 2026.
Top airline flying from Belfast to San Francisco
Discover the top airline that operate flights from Belfast to San Francisco. 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 April 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$542 | Average$1,706 | FlexibilityNo cancel fee | On-time70% |