$316 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 10/4. 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
$870
British Airways
Mon 8/17Mon 9/7
SFO - BHD • 1 stop
Cheapest one-way
$316
British Airways
Sun 10/4
SFO - BHD • 2 stops
Top airlines
Cheapest • from $870 (round-trip)
Best reviews • 6.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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, Aug 17 - Mon, Sep 7
British Airways Logo
4:35 pm - 3:30 pm
SFO
-
BHD
14h 55m
1 stop
British Airways Logo
7:35 pm - 1:50 pm
BHD
-
SFO
26h 15m
1 stop
$870British Airways
Mon, Aug 17 - Mon, Sep 7
British Airways Logo
3:46 pm - 6:45 pm
SFO
-
BHD
18h 59m
2 stops
British Airways Logo
7:35 pm - 1:50 pm
BHD
-
SFO
26h 15m
1 stop
$891British Airways
Mon, Aug 17 - Mon, Sep 7
British Airways Logo
3:46 pm - 8:35 pm
SFO
-
BHD
20h 49m
2 stops
British Airways Logo
7:35 pm - 10:22 pm
BHD
-
SFO
34h 47m
2 stops
$899British Airways
Mon, Aug 3 - Sun, Aug 23
British Airways Logo
4:04 pm - 7:25 pm
SFO
-
BHD
19h 21m
2 stops
British Airways Logo
7:10 pm - 1:50 pm
BHD
-
SFO
26h 40m
1 stop
$926British Airways
Mon, Aug 3 - Sun, Aug 23
British Airways Logo
7:30 pm - 8:35 pm
SFO
-
BHD
17h 05m
1 stop
British Airways Logo
7:10 pm - 1:50 pm
BHD
-
SFO
26h 40m
1 stop
$928British Airways
Mon, Aug 3 - Sun, Aug 23
British Airways Logo
2:35 pm - 10:45 am
SFO
-
BHD
36h 10m
2 stops
British Airways Logo
6:30 am - 10:18 pm
BHD
-
SFO
23h 48m
2 stops
$976British Airways
Mon, Aug 17 - Mon, Sep 7
Multiple Airlines Logo
4:30 pm - 10:25 pm
SFO
-
BFS
21h 55m
2 stops
Multiple Airlines Logo
6:10 am - 2:30 pm
BFS
-
SFO
40h 20m
2 stops
$992Multiple Airlines
Sat, May 9 - Thu, May 21
Delta Logo
1:45 pm - 9:20 am
SFO
-
BHD
35h 35m
1 stop
Delta Logo
9:50 am - 11:45 am
BHD
-
SFO
33h 55m
1 stop
$1,097Delta
Sat, May 9 - Wed, May 20
Delta Logo
10:29 am - 4:55 pm
SFO
-
BHD
22h 26m
2 stops
Delta Logo
5:30 pm - 11:45 am
BHD
-
SFO
26h 15m
1 stop
$1,101Delta
Sat, May 9 - Wed, May 20
Delta Logo
10:29 am - 4:55 pm
SFO
-
BHD
22h 26m
2 stops
Delta Logo
9:50 am - 12:27 am
BHD
-
SFO
22h 37m
2 stops
$1,111Delta
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.

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

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 departing in August.

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 $0 (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.

Good to know

Cheapest flight$316
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 $316 for a one-way ticket and $870 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 7937 reviews
6.4Food
6.4Entertainment
7.7Crew
6.9Boarding
6.8Comfort
Airline reviews

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

10.0 ExcellentAnonymous, Apr 2026
SFO - LHR
Read more British Airways reviews

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

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

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

Information on your arrival and departure airports