SFO - BFS

$268 Find Cheap Flights from San Francisco to Belfast Intl Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Belfast Intl departing on 11/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Belfast, as well as popular online travel agencies
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Flight Deals

Cheap Flights from San Francisco to Belfast Intl (SFO-BFS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Belfast Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Belfast Intl

Tue, Mar 24 - Tue, Mar 31
Multiple Airlines Logo
10:24 am - 8:15 pmSFO-BFS
26h 51m3 stops
Multiple Airlines Logo
6:45 am - 3:45 pmBFS-SFO
41h 00m3 stops
$1,024Multiple Airlines
Find Deal
Tue, Mar 24 - Tue, Mar 31
Multiple Airlines Logo
6:20 pm - 8:15 pmSFO-BFS
18h 55m2 stops
Multiple Airlines Logo
6:45 am - 3:45 pmBFS-SFO
41h 00m3 stops
$1,027Multiple Airlines
Find Deal
Sat, Mar 28 - Sat, Apr 11
Multiple Airlines Logo
7:40 pm - 10:25 pmSFO-BFS
18h 45m2 stops
Multiple Airlines Logo
9:40 pm - 3:45 pmBFS-SFO
26h 05m2 stops
$1,205Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Multiple Airlines Logo
10:12 am - 10:00 pmSFO-BFS
27h 48m3 stops
Multiple Airlines Logo
4:05 pm - 3:35 pmBFS-SFO
31h 30m3 stops
$1,357Multiple Airlines
Find Deal
Tue, Mar 24 - Tue, Mar 31
Multiple Airlines Logo
6:20 pm - 8:15 pmSFO-BFS
18h 55m2 stops
Multiple Airlines Logo
5:55 am - 3:45 pmBFS-SFO
17h 50m2 stops
$1,448Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Multiple Airlines Logo
10:12 am - 10:00 pmSFO-BFS
27h 48m3 stops
Multiple Airlines Logo
8:25 pm - 3:35 pmBFS-SFO
27h 10m2 stops
$1,508Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Multiple Airlines Logo
5:20 pm - 10:00 pmSFO-BFS
20h 40m2 stops
Multiple Airlines Logo
8:25 pm - 3:35 pmBFS-SFO
27h 10m2 stops
$1,933Multiple Airlines
Find Deal
Sat, Nov 22 - Sat, Nov 29
Multiple Airlines Logo
5:20 pm - 9:40 pmSFO-BFS
20h 20m2 stops
Multiple Airlines Logo
8:30 am - 6:45 pmBFS-SFO
18h 15m2 stops
$2,650Multiple Airlines
Find Deal
Sat, Nov 22 - Sat, Nov 29
Multiple Airlines Logo
7:20 am - 2:05 pmSFO-BFS
22h 45m2 stops
Multiple Airlines Logo
8:10 am - 6:45 pmBFS-SFO
18h 35m1 stop
$3,006Multiple Airlines
Find Deal

Everything you should know

When to travel
April
Cheapest • 29% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$1,024
Overall average: $679
Multiple Airlines
Tue 3/24Tue 3/31
SFO - BFS • 3 stops
Cheapest one-way
$268
Multiple Airlines
Mon 11/17
SFO - BFS • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Belfast Intl!
Booking Insights

KAYAK's insights & trends for San Francisco to Belfast Intl flights

Get data-powered insights and trends into flights from San Francisco to Belfast Intl to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from San Francisco to Belfast Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Belfast Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Belfast Intl Airport is April, where tickets cost $622 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $1,339 and $1,150 respectively.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$268
Best time to beat the crowds but there is an average 52% increase in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from San Francisco to Belfast Intl Airport

When to book flights from San Francisco to Belfast Intl

Are your dates flexible? Find out the best times to travel from San Francisco to Belfast Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking San Francisco to Belfast Intl Airport flights

  • What is the cheapest flight from San Francisco to Belfast Intl Airport?

    In the last 3 days, the lowest price for a flight from San Francisco to Belfast Intl Airport was $268 for a one-way ticket and $1,024 for a round-trip.

  • Do I need a passport to fly between San Francisco and Belfast Intl Airport?

    Yes, you’ll need a passport to travel to Belfast Intl Airport from San Francisco.

  • Which aircraft models fly most regularly from San Francisco to Belfast Intl Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Belfast Intl Airport?

    oneworld is the only airline alliance operating flights between San Francisco and Belfast Intl Airport.

  • How does KAYAK find such low prices on flights from San Francisco to Belfast Intl Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Belfast Intl Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Belfast Intl Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast Intl Airport from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Belfast Intl Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast Intl Airport with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and BFS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Belfast Intl Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast Intl Airport from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from San Francisco to Belfast Intl

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Belfast Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.7
British AirwaysOverall score based on 7496 reviews
6.7Comfort
6.9Boarding
6.3Food
6.4Entertainment
7.6Crew
Airline reviews

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

10.0 ExcellentAnonymous, Nov 2025SFO - PDX
Read more British Airways reviews

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

Need to offer Better food from LAX to London Service from London to Delhi very delayed after take off.

Great crew and food and beverage. Seating tight but not the airline's fault. Will definitely fly BA in future!

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?

Enjoyable flight, helpful crew everything was organized to accommodate passengers.

I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.

Everything you need to know for your flight from San Francisco to Belfast Intl

Information on your arrival and departure airports

San Francisco (SFO)
Belfast Intl (BFS)

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