$526+ Cheap flights from San Francisco (SFO) to Belfast Intl (BFS)
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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Sep 18 — Sep 251
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Belfast Intl 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 San Francisco to Belfast Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Francisco to Belfast IntlExplore the most affordable flight options available from San Francisco to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
Explore the most affordable flight options available from San Francisco to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2026.
This Mytrip deal was found by Cheapflights users on 8/15. 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 10/58:10 am -
3 stops27h 10m
Mon 10/193:05 pm -
2 stops32h 50m
Deal found 8/15![Multiple Airlines logo]()
$951
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/143:15 pm -
2 stops24h 05m
Wed 9/306:15 am -
1 stop22h 35m
Deal found 8/17![Multiple Airlines logo]()
$1,025
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/1611:35 am -
2 stops18h 10m
Tue 9/226:40 am -
3 stops39h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,105
This Mytrip deal was found by Cheapflights users on 8/17. 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 10/14:30 pm -
2 stops18h 50m
Thu 10/810:20 am -
2 stops33h 25m
Deal found 8/17![Multiple Airlines logo]()
$1,131
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/1611:35 am -
2 stops18h 10m
Wed 9/238:15 am -
3 stops36h 00m
Deal found 8/18![Multiple Airlines logo]()
$1,136
Best flights from San Francisco to Belfast IntlDiscover carefully curated flight deals from San Francisco to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
Discover carefully curated flight deals from San Francisco to Belfast Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 19, 2026.
This Mytrip deal was found by Cheapflights users on 8/15. 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 10/58:10 am -
3 stops27h 10m
Mon 10/193:05 pm -
2 stops32h 50m
Deal found 8/15![Multiple Airlines logo]()
$951
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/143:15 pm -
2 stops24h 05m
Wed 9/306:15 am -
1 stop22h 35m
Deal found 8/17![Multiple Airlines logo]()
$1,025
This Mytrip deal was found by Cheapflights users on 8/17. 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 10/14:30 pm -
2 stops18h 50m
Thu 10/810:20 am -
2 stops33h 25m
Deal found 8/17![Multiple Airlines logo]()
$1,131
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/168:30 am -
3 stops20h 40m
Tue 9/226:40 am -
3 stops39h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,157
This Mytrip deal was found by Cheapflights users on 8/17. 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 1/287:25 pm -
2 stops16h 55m
Sun 1/318:40 pm -
2 stops26h 05m
Deal found 8/17![Multiple Airlines logo]()
$1,202
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/165:40 pm -
2 stops19h 30m
Wed 9/236:10 am -
2 stops24h 54m
Deal found 8/18![Multiple Airlines logo]()
$1,267
This Mytrip deal was found by Cheapflights users on 8/15. 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 11/212:45 pm -
3 stops22h 45m
Sat 11/2811:00 pm -
3 stops47h 45m
Deal found 8/15![Multiple Airlines logo]()
$1,305
This Mytrip deal was found by Cheapflights users on 8/18. 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 10/26:40 am -
3 stops25h 50m
Fri 10/910:10 pm -
3 stops30h 49m
Deal found 8/18![Multiple Airlines logo]()
$1,384
Last-minute flights from San Francisco to Belfast IntlDiscover last-minute flight deals from San Francisco to Belfast Intl. Data last updated August 19, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Belfast Intl. Data last updated August 19, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 9/143:15 pm -
2 stops24h 05m
Wed 9/306:15 am -
1 stop22h 35m
Deal found 8/17![Multiple Airlines logo]()
$1,025
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/1611:35 am -
2 stops18h 10m
Tue 9/226:40 am -
3 stops39h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,105
This Mytrip deal was found by Cheapflights users on 8/18. 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 9/1611:35 am -
2 stops18h 10m
Wed 9/238:15 am -
3 stops36h 00m
Deal found 8/18![Multiple Airlines logo]()
$1,136
One-way flights from San Francisco to Belfast IntlSearch for one-way flight options from San Francisco to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
Search for one-way flight options from San Francisco to Belfast Intl. Find affordable one-way fares based on user searches. Data last updated August 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Wed 8/264:35 pm -
3 stops35h 15m
Deal found 8/14![Multiple Airlines logo]()
$526
Find flight deals from San Francisco to Belfast Intl
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Belfast Intl (BFS). 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 19, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $951 (Mytrip) |
One-way from | $526 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco to Belfast Intl 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 19, 2026.
Use the filters below to find and compare flights from San Francisco to Belfast Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Mon 10/5
8:10 am-7:20 pm
3 stops27h 10m
Belfast Intl
Mon 10/19
3:05 pm-3:55 pm
2 stops32h 50m
$951
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Mon 9/14
3:15 pm-11:20 pm
2 stops24h 05m
Belfast Intl
Wed 9/30
6:15 am-8:50 pm
1 stop22h 35m
$1,025
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Thu 10/1
4:30 pm-7:20 pm
2 stops18h 50m
Belfast Intl
Thu 10/8
10:20 am-11:45 am
2 stops33h 25m
$1,131
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Wed 9/16
8:30 am-1:10 pm
3 stops20h 40m
Belfast Intl
Tue 9/22
6:40 am-2:35 pm
3 stops39h 55m
$1,157
Quickest round-trip
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Thu 1/28
7:25 pm-8:20 pm
2 stops16h 55m
Belfast Intl
Sun 1/31
8:40 pm-2:45 pm
2 stops26h 05m
$1,202
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Wed 9/16
5:40 pm-9:10 pm
2 stops19h 30m
Belfast Intl
Wed 9/23
6:10 am-11:04 pm
2 stops24h 54m
$1,267
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Sat 11/21
2:45 pm-9:30 pm
3 stops22h 45m
Belfast Intl
Sat 11/28
11:00 pm-2:45 pm
3 stops47h 45m
$1,305
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Fri 10/2
6:40 am-4:30 pm
3 stops25h 50m
Belfast Intl
Fri 10/9
10:10 pm-8:59 pm
3 stops30h 49m
$1,384
Cheapest one-way
Quickest one-way
San FranciscoBelfast
SFO San Francisco - BFS Belfast Intl
SFOBFS
San Francisco
Wed 8/26
4:35 pm-11:50 am
3 stops35h 15m
$526
Sorted by cheapest first
Compare providers for flights from San Francisco to Belfast Intl
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 San Francisco to Belfast Intl in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-Belfast Intl Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on San Francisco-Belfast Intl Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from San Francisco-Belfast Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-Belfast Intl Airport flights, Cheapflights users trust Ovago the most. Ovago 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 San Francisco-Belfast Intl Airport 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 San Francisco to Belfast Intl
Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from San Francisco with our price prediction graph.
SFO-BFS
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.
Reviews of airlines servicing Belfast Intl
Get insights into the airlines that provide service to Belfast Intl. 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 Intl. Reviews last updated August 19, 2026.
See what other customers who have flown with British Airways from San Francisco to Belfast Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.5
Overall
6.7
Comfort
6.8
Boarding
7.0
Crew
7.7
Food
6.4
Reviews
1 / 20
8.0
ExcellentLakshmi,Dec 2025
SFO - LHR
Entertainment
6.5
Overall
6.7
Comfort
6.8
Boarding
7.0
Crew
7.7
Food
6.4
Reviews
1 / 20
8.0
ExcellentLakshmi,Dec 2025
SFO - LHR
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Belfast Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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
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Complete your trip
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Alternative routes for San Francisco to Belfast Intl
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Other flights to Belfast Intl
Explore flights to Belfast Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 19, 2026.
Complete your trip
Complete your trip to Belfast Intl by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Belfast Intl by cabin class
Find flights from San Francisco to Belfast Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Belfast Intl flights
Browse other San Francisco and Belfast Intl flight options. Last updated on August 19, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on August 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from San Francisco to Belfast Intl
Discover the top airline that operate flights from San Francisco to Belfast Intl. 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 August 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$586 | Average$873 | FlexibilityNo cancel fee | On-time70% |