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Cheap flights from San Francisco to Belfast from £214

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 10/11. 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
0 bags
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Find the cheapest flights from San Francisco to Belfast

Cheap return flights

Multiple Airlines Logo
20:25 - 22:20SFO-BFS
18h 55m2 stops
Multiple Airlines Logo
14:25 - 16:30BFS-SFO
34h 05m2 stops
£619Multiple Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Multiple Airlines Logo
15:40 - 22:00SFO-BFS
23h 20m2 stops
Multiple Airlines Logo
06:15 - 16:05BFS-SFO
41h 50m3 stops
£663Multiple Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Multiple Airlines Logo
08:30 - 22:00SFO-BFS
30h 30m3 stops
Multiple Airlines Logo
06:15 - 16:05BFS-SFO
41h 50m3 stops
£667Multiple Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Multiple Airlines Logo
16:30 - 21:15SFO-BFS
20h 45m1 stop
Multiple Airlines Logo
08:10 - 18:45BFS-SFO
18h 35m1 stop
£683Multiple Airlines
Find Deal
Sat, 25 Oct - Sat, 8 Nov
Multiple Airlines Logo
20:30 - 12:10SFO-BFS
31h 40m1 stop
Multiple Airlines Logo
07:25 - 22:53BFS-SFO
23h 28m2 stops
£683Multiple Airlines
Find Deal
Sat, 27 Sep - Tue, 7 Oct
Multiple Airlines Logo
20:30 - 12:10SFO-BFS
31h 40m1 stop
Multiple Airlines Logo
06:05 - 23:49BFS-SFO
25h 44m2 stops
£689Multiple Airlines
Find Deal
Sat, 27 Sep - Fri, 3 Oct
Multiple Airlines Logo
20:30 - 12:10SFO-BFS
31h 40m1 stop
Multiple Airlines Logo
21:55 - 15:55BFS-SFO
26h 00m2 stops
£703Multiple Airlines
Find Deal
Sat, 27 Sep - Mon, 6 Oct
Multiple Airlines Logo
20:30 - 12:10SFO-BFS
31h 40m1 stop
Multiple Airlines Logo
22:05 - 15:55BFS-SFO
25h 50m2 stops
£712Multiple Airlines
Find Deal
Sat, 27 Sep - Wed, 1 Oct
Multiple Airlines Logo
16:20 - 23:00SFO-BFS
22h 40m3 stops
Multiple Airlines Logo
13:15 - 16:35BFS-SFO
34h 20m2 stops
£738Multiple Airlines
Find Deal
Mon, 20 Oct - Fri, 31 Oct
Multiple Airlines Logo
20:25 - 21:40SFO-BFS
18h 15m2 stops
Multiple Airlines Logo
23:10 - 14:35BFS-SFO
47h 25m3 stops
£749Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 17 September 2025.
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

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 30/10

20:25-22:20

2 stops18h 55m

Belfast Intl

Thu 6/11

14:25-16:30

2 stops34h 05m

£619

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 30/10

15:40-22:00

2 stops23h 20m

Belfast Intl

Thu 6/11

06:15-16:05

3 stops41h 50m

£663

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 30/10

08:30-22:00

3 stops30h 30m

Belfast Intl

Thu 6/11

06:15-16:05

3 stops41h 50m

£666

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 25/10

16:30-21:15

1 stop20h 45m

Belfast Intl

Sat 8/11

08:10-18:45

1 stop18h 35m

£683

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 27/9

20:30-12:10

1 stop31h 40m

Belfast Intl

Tue 7/10

07:25-22:53

2 stops23h 28m

£683

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 27/9

20:30-12:10

1 stop31h 40m

Belfast Intl

Fri 3/10

06:05-23:49

2 stops25h 44m

£688

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 27/9

20:30-12:10

1 stop31h 40m

Belfast Intl

Mon 6/10

21:55-15:55

2 stops26h 00m

£703

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 27/9

20:30-12:10

1 stop31h 40m

Belfast Intl

Wed 1/10

22:05-15:55

2 stops25h 50m

£712

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 20/10

16:20-23:00

3 stops22h 40m

Belfast Intl

Fri 31/10

13:15-16:35

2 stops34h 20m

£738

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sat 1/11

20:25-21:40

2 stops18h 15m

Belfast Intl

Sat 8/11

23:10-14:35

3 stops47h 25m

£749

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from San Francisco to Belfast Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Belfast Intl Airport?

The month of October is, on average, the cheapest month to fly to Belfast Intl Airport from San Francisco, with most prices found around £431. If you’re not able to fly to Belfast Intl Airport in October, then April is your next best option. Flight prices from San Francisco to Belfast Intl Airport during April average around £456.

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 return 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

Direct flights

None
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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  • How far is San Francisco to Belfast Intl by plane?

    Belfast Intl is 5016.8 mi away from San Francisco. Flights usually cover this in 18h 15m, depending on flying conditions and air traffic around both airports.

  • 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 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 travel and health documents you'll need for your trip to Belfast Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Belfast?

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

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?

momondo does allow users to show only those flights to Belfast from San Francisco which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Francisco to Belfast.

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

Yes momondo offers price alerts on flights to Belfast from San Francisco. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belfast Intl Airport trip

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