$479 Find Cheap Flights from San Francisco to Belfast

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 departing on 6/17. 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

 
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
$652
British Airways
Mon 1/19Mon 1/26
SFO - BHD • 1 stop
Cheapest one-way
$479
British Airways
Wed 6/17
SFO - BHD • 2 stops
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to Belfast (SFO-BHD)

 
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 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

Mon, Jan 19 - Mon, Jan 26
British Airways Logo
8:40 pm - 8:15 pm
SFO
-
BHD
15h 35m1 stop
British Airways Logo
5:45 pm - 3:00 pm
BHD
-
SFO
29h 15m1 stop
$652British Airways
Thu, May 7 - Wed, May 13
British Airways Logo
7:30 pm - 7:20 pm
SFO
-
BHD
15h 50m1 stop
British Airways Logo
6:50 am - 1:50 pm
BHD
-
SFO
15h 00m1 stop
$662British Airways
Mon, Jan 19 - Mon, Jan 26
British Airways Logo
6:37 am - 10:40 am
SFO
-
BHD
20h 03m2 stops
British Airways Logo
5:45 pm - 3:00 pm
BHD
-
SFO
29h 15m1 stop
$672British Airways
Mon, Jan 19 - Mon, Jan 26
British Airways Logo
11:13 pm - 10:30 am
SFO
-
BHD
27h 17m2 stops
British Airways Logo
7:25 pm - 8:10 pm
BHD
-
SFO
32h 45m2 stops
$675British Airways
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
5:30 pm - 4:35 pm
SFO
-
BHD
15h 05m1 stop
British Airways Logo
6:30 am - 3:00 pm
BHD
-
SFO
16h 30m1 stop
$677British Airways
Thu, Jan 15 - Wed, Jan 21
British Airways Logo
9:00 pm - 6:50 pm
SFO
-
BHD
13h 50m1 stop
British Airways Logo
6:35 am - 3:00 pm
BHD
-
SFO
16h 25m1 stop
$679British Airways
Wed, Mar 4 - Sun, Mar 8
British Airways Logo
5:30 pm - 4:35 pm
SFO
-
BHD
15h 05m1 stop
British Airways Logo
10:40 am - 7:45 pm
BHD
-
SFO
16h 05m1 stop
$683British Airways
Fri, Mar 27 - Fri, Apr 3
British Airways Logo
2:33 pm - 5:15 pm
SFO
-
BHD
19h 42m2 stops
British Airways Logo
9:30 am - 11:06 pm
BHD
-
SFO
21h 36m2 stops
$686British Airways
Thu, Jan 15 - Wed, Jan 21
Multiple Airlines Logo
9:00 pm - 6:50 pm
SFO
-
BHD
13h 50m1 stop
Multiple Airlines Logo
11:25 am - 12:47 am
BHD
-
SFO
21h 22m2 stops
$687Multiple Airlines
Thu, Jan 15 - Wed, Jan 21
American Airlines Logo
3:35 pm - 6:50 pm
SFO
-
BHD
19h 15m2 stops
American Airlines Logo
6:35 am - 8:10 pm
BHD
-
SFO
21h 35m2 stops
$689American Airlines
Booking Insights

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

Get data-powered insights and trends into flights from San Francisco to Belfast 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?

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, 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 is April, where tickets cost $622 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,223 and $1,136 respectively.

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Good to know

Cheapest flight$479
Flight from San Francisco to Belfast City Airport

When to book flights from San Francisco to Belfast

Are your dates flexible? Find out the best times to travel from San Francisco to Belfast 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 flights from San Francisco to Belfast

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

    In the last 3 days, the lowest price for a flight from San Francisco to Belfast was $479 for a one-way ticket and $652 for a round-trip.

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

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

  • Which airports will I be using when flying from San Francisco to Belfast?

    When flying out of San Francisco you will be using San Francisco. You will be landing at one of these airports: Belfast Intl or Belfast City.

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

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

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

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

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast 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?

    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 with an airline and back to San Francisco with another airline.

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

    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 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

 
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? 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 7618 reviews
6.9Boarding
6.7Comfort
6.4Entertainment
7.6Crew
6.4Food
Airline reviews

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

2.0 MediocreJose, Dec 2025
SAN - LHR
Read more British Airways reviews

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

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

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!

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

Information on your arrival and departure airports

San Francisco (SFO)