SFO - BFS

$955 Find Cheap Flights from San Francisco to Belfast Intl Airport

This is the cheapest round-trip 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 5/16. 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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Everything you should know

Cheapest round-trip
$955
Typical prices: $870-$720
Multiple Airlines
Sat 5/16Thu 5/28
SFO - BFS • 3 stops
When to travel
April
Cheapest • 28% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Belfast Intl!
Flight Deals
Booking Insights
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

Sat, May 16 - Thu, May 28
Multiple Airlines Logo
6:00 am - 10:40 pm
SFO
-
BFS
32h 40m
3 stops
Multiple Airlines Logo
6:35 am - 1:35 pm
BFS
-
SFO
39h 00m
3 stops
$955Multiple Airlines
Fri, Apr 17 - Mon, Apr 20
Multiple Airlines Logo
12:55 pm - 11:20 pm
SFO
-
BFS
26h 25m
2 stops
Multiple Airlines Logo
6:50 pm - 4:40 pm
BFS
-
SFO
29h 50m
2 stops
$994Multiple Airlines
Sat, May 16 - Thu, May 28
Multiple Airlines Logo
6:00 am - 10:40 pm
SFO
-
BFS
32h 40m
2 stops
Multiple Airlines Logo
8:05 pm - 8:50 pm
BFS
-
SFO
32h 45m
1 stop
$1,044Multiple Airlines
Sat, May 16 - Thu, May 28
Multiple Airlines Logo
8:30 am - 12:50 pm
SFO
-
BFS
20h 20m
2 stops
Multiple Airlines Logo
6:35 am - 1:35 pm
BFS
-
SFO
39h 00m
3 stops
$1,076Multiple Airlines
Tue, May 5 - Thu, Nov 5
Multiple Airlines Logo
2:40 pm - 7:40 pm
SFO
-
BFS
21h 00m
2 stops
Multiple Airlines Logo
8:50 am - 4:05 pm
BFS
-
SFO
39h 15m
3 stops
$1,178Multiple Airlines
Tue, May 5 - Thu, Nov 5
Multiple Airlines Logo
8:30 am - 7:20 pm
SFO
-
BFS
26h 50m
3 stops
Multiple Airlines Logo
8:50 am - 4:05 pm
BFS
-
SFO
39h 15m
3 stops
$1,190Multiple Airlines
Tue, May 5 - Thu, Nov 5
Multiple Airlines Logo
2:40 pm - 7:40 pm
SFO
-
BFS
21h 00m
2 stops
Multiple Airlines Logo
2:25 pm - 4:30 pm
BFS
-
SFO
34h 05m
2 stops
$1,215Multiple Airlines
Sat, May 16 - Thu, May 28
Multiple Airlines Logo
8:30 am - 8:55 am
SFO
-
BFS
16h 25m
2 stops
Multiple Airlines Logo
8:05 pm - 1:35 pm
BFS
-
SFO
25h 30m
2 stops
$1,216Multiple Airlines
Sat, May 16 - Thu, May 28
Multiple Airlines Logo
8:30 pm - 3:00 pm
SFO
-
BFS
34h 30m
1 stop
Multiple Airlines Logo
8:05 pm - 8:50 pm
BFS
-
SFO
32h 45m
1 stop
$1,225Multiple Airlines
Fri, Apr 17 - Mon, Apr 20
Multiple Airlines Logo
7:35 pm - 9:15 pm
SFO
-
BFS
17h 40m
2 stops
Multiple Airlines Logo
6:10 am - 3:32 pm
BFS
-
SFO
41h 22m
3 stops
$1,263Multiple Airlines
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.

How much is a round-trip flight from San Francisco to Belfast Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Belfast Intl Airport departing in May.

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 $587 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,213 and $1,095 respectively.

Find deals

Good to know

Low seasonFebruary
Cheapest flight$955
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 5% increase in price.
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 $955 for a round-trip ticket.

  • 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 7848 reviews
6.4Entertainment
6.4Food
6.8Comfort
6.9Boarding
7.6Crew
Airline reviews

Wish the food and overall service was better. They treat Business class passengers same as economy

4.0 OkayAnonymous, Mar 2026
SFO - LHR
Read more British Airways reviews

Wish the food and overall service was better. They treat Business class passengers same as economy

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Awful it always is unfortunately is the only way to fly direct to london

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

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

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!

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)