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Cheap flights from San Francisco to Belfast from $491

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Belfast departing on 9/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from San Francisco to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 10:40 amSFO  San Francisco-BFS Belfast Intl
30h 10m1 stop Paris Orly
Multiple Airlines Logo
8:50 am - 4:15 pmBFS  Belfast Intl-SFO San Francisco
39h 25m2 stops London Stansted Zurich
$973Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
6:00 am - 3:00 pmSFO  San Francisco-BFS Belfast Intl
25h 00m2 stops Calgary Paris Charles de Gaulle
Multiple Airlines Logo
2:55 pm - 4:15 pmBFS  Belfast Intl-SFO San Francisco
33h 20m2 stops London Gatwick Zurich
$1,029Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
8:30 am - 5:25 pmSFO  San Francisco-BFS Belfast Intl
24h 55m2 stops Toronto Pearson Intl Edinburgh Turnhouse
Multiple Airlines Logo
6:20 am - 9:49 pmBFS  Belfast Intl-SFO San Francisco
47h 29m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
$1,056Multiple Airlines
Sun, Sep 13 - Sat, Sep 19
Multiple Airlines Logo
5:45 pm - 11:20 pmSFO  San Francisco-BFS Belfast Intl
21h 35m1 stop London Heathrow
Multiple Airlines Logo
2:45 pm - 8:50 pmBFS  Belfast Intl-SFO San Francisco
38h 05m1 stop Paris Charles de Gaulle
$1,082Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
8:10 pm - 7:05 pmSFO  San Francisco-BFS Belfast Intl
14h 55m1 stop Paris Charles de Gaulle
Multiple Airlines Logo
8:15 pm - 6:41 pmBFS  Belfast Intl-SFO San Francisco
30h 26m3 stops London Stansted Zurich Vancouver Intl
$1,084Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
8:30 am - 3:15 pmSFO  San Francisco-BFS Belfast Intl
22h 45m2 stops Toronto Pearson Intl Manchester
Multiple Airlines Logo
9:25 pm - 9:49 pmBFS  Belfast Intl-SFO San Francisco
32h 24m3 stops Edinburgh Turnhouse Halifax Intl Toronto Pearson Intl
$1,107Multiple Airlines
Tue, Sep 8 - Mon, Sep 14
Multiple Airlines Logo
8:30 am - 3:15 pmSFO  San Francisco-BFS Belfast Intl
22h 45m2 stops Toronto Pearson Intl Manchester
Multiple Airlines Logo
6:10 am - 9:55 pmBFS  Belfast Intl-SFO San Francisco
23h 45m3 stops London Gatwick Toronto Pearson Intl Calgary
$1,115Multiple Airlines
Tue, Sep 8 - Mon, Sep 14
Multiple Airlines Logo
8:30 am - 4:25 pmSFO  San Francisco-BFS Belfast Intl
23h 55m2 stops Toronto Pearson Intl Manchester
Multiple Airlines Logo
6:10 am - 9:49 pmBFS  Belfast Intl-SFO San Francisco
23h 39m2 stops London Gatwick Toronto Pearson Intl
$1,123Multiple Airlines
Tue, Sep 8 - Mon, Sep 14
Multiple Airlines Logo
6:40 am - 3:00 pmSFO  San Francisco-BFS Belfast Intl
24h 20m3 stops Vancouver Intl Calgary Paris Charles de Gaulle
Multiple Airlines Logo
2:55 pm - 4:15 pmBFS  Belfast Intl-SFO San Francisco
33h 20m2 stops London Gatwick Zurich
$1,126Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
11:35 am - 8:25 pmSFO  San Francisco-BFS Belfast Intl
24h 50m3 stops Toronto Pearson Intl Frankfurt am Main Palma de Mallorca Son Sant Joan
Multiple Airlines Logo
9:05 pm - 6:31 pmBFS  Belfast Intl-SFO San Francisco
29h 26m3 stops Palma de Mallorca Son Sant Joan Zurich Vancouver Intl
$1,130Multiple Airlines
Tue, Sep 8 - Mon, Sep 14

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momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Belfast Intl Airport 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, momondo users made 832,500 searches. Data last updated August 9, 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

Price

Cheapest round-trip

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 9/21

8:30 pm-10:40 am

1 stop30h 10m

Belfast Intl

Tue 10/6

8:50 am-4:15 pm

2 stops39h 25m

$973

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sun 9/20

6:00 am-3:00 pm

2 stops25h 00m

Belfast Intl

Sun 9/27

2:55 pm-4:15 pm

2 stops33h 20m

$1,029

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sun 9/13

8:30 am-5:25 pm

2 stops24h 55m

Belfast Intl

Sat 9/19

6:20 am-9:49 pm

3 stops47h 29m

$1,056

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 9/21

5:45 pm-11:20 pm

1 stop21h 35m

Belfast Intl

Tue 10/6

2:45 pm-8:50 pm

1 stop38h 05m

$1,082
Quickest round-trip

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Mon 9/21

8:10 pm-7:05 pm

1 stop14h 55m

Belfast Intl

Tue 10/6

8:15 pm-6:41 pm

3 stops30h 26m

$1,084

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Tue 9/8

8:30 am-3:15 pm

2 stops22h 45m

Belfast Intl

Mon 9/14

9:25 pm-9:49 pm

3 stops32h 24m

$1,107

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Tue 9/8

8:30 am-3:15 pm

2 stops22h 45m

Belfast Intl

Mon 9/14

6:10 am-9:55 pm

3 stops23h 45m

$1,115

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Tue 9/8

8:30 am-4:25 pm

2 stops23h 55m

Belfast Intl

Mon 9/14

6:10 am-9:49 pm

2 stops23h 39m

$1,123

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Sun 9/20

6:40 am-3:00 pm

3 stops24h 20m

Belfast Intl

Sun 9/27

2:55 pm-4:15 pm

2 stops33h 20m

$1,126

San FranciscoBelfast

SFO San Francisco - BFS Belfast Intl

SFOBFS

San Francisco

Tue 9/8

11:35 am-8:25 pm

3 stops24h 50m

Belfast Intl

Mon 9/14

9:05 pm-6:31 pm

3 stops29h 26m

$1,130

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

When to book flights from San Francisco to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Belfast Intl Airport (SFO to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Belfast Intl Airport

Fastest flight time

14h 05m

Direct flights

None
The fastest flight from San Francisco to Belfast Intl Airport takes 14h 05m
There are no direct flights from San Francisco to Belfast Intl Airport. There are no popular flight routes from San Francisco to Belfast Intl Airport.
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Frequently asked questions about flying from San Francisco to Belfast Intl Airport

  • How far is San Francisco to Belfast Intl by plane?

    Belfast Intl is 5017.1 mi away from San Francisco. In terms of flight time, this usually takes a little over 14h 05m.

  • When did momondo last update prices for flights from San Francisco Airport to Belfast Intl Airport?

    Prices for flights from San Francisco Airport to Belfast Intl Airport refresh daily.

  • How many operators does momondo search for flights from San Francisco Airport to Belfast Intl Airport?

  • How old do you have to be to fly from San Francisco Airport to Belfast Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The required travel and health documents for your Belfast Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Belfast Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from San Francisco to Belfast Intl Airport?

Best airlines flying from San Francisco to Belfast Intl Airport

Compare and see reviews for airlines that fly from San Francisco to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $586Free CancellationRating
6.7
8,151 reviews
Search British Airways flights

Frequently asked questions about flying from San Francisco to Belfast Intl Airport

  • How do I get Price Alerts for flights from San Francisco to Belfast Intl Airport?

    Confirm your travel details to search for the latest offers for flights from San Francisco to Belfast Intl Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from San Francisco to Belfast Intl Airport with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Ballymena
Newry
Dungannon

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Belfast?

It is quick and easy to find San Francisco to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

Can I find flights from San Francisco to Belfast with flexible booking policies on momondo?

Yes. All flights to Belfast from San Francisco on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from San Francisco to Belfast?

Once you have performed a search for San Francisco to Belfast flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from San Francisco to Belfast right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from San Francisco and alert you when they change.

An easier way to manage your Belfast Intl Airport trip

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