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

Price Alerts will notify you by email when the price for flights to San Francisco from Belfast Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

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

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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

Prices for flights from Belfast Intl Airport to San Francisco Airport were last updated today.

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

What documentation or ID do you need to fly to San Francisco Airport?

The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$806 Cheap Flights from Belfast Intl Airport to San Francisco in 2025/26

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Find the cheapest flights from Belfast Intl Airport to San Francisco

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Cheap round-trip flights

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7:05 am - 2:30 pmBFS-SFO

39h 25m3 stops

4:40 pm - 10:20 pmSFO-BFS

21h 40m2 stops

$1,019Multiple Airlines

Find Deal

Tue, Dec 23 - Thu, Jan 8

7:05 am - 2:30 pmBFS-SFO

39h 25m3 stops

7:30 am - 2:00 pmSFO-BFS

22h 30m3 stops

$1,020Multiple Airlines

Find Deal

Tue, Dec 23 - Thu, Jan 8

2:15 pm - 4:30 pmBFS-SFO

34h 15m2 stops

4:40 pm - 10:20 pmSFO-BFS

21h 40m2 stops

$1,067Multiple Airlines

Find Deal

Tue, Dec 23 - Thu, Jan 8

8:35 am - 9:39 pmBFS-SFO

21h 04m2 stops

7:25 pm - 9:10 pmSFO-BFS

17h 45m2 stops

$1,165Multiple Airlines

Find Deal

Mon, Dec 8 - Mon, Dec 15

momondo Fare Finder

Use the filters below to find and compare flights from Belfast Intl Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 12/23

7:05 am-2:30 pm

3 stops39h 25m

San Francisco

Thu 1/8

4:40 pm-10:20 pm

2 stops21h 40m

$1,019

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 12/23

7:05 am-2:30 pm

3 stops39h 25m

San Francisco

Thu 1/8

7:30 am-2:00 pm

3 stops22h 30m

$1,020

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Tue 12/23

2:15 pm-4:30 pm

2 stops34h 15m

San Francisco

Thu 1/8

4:40 pm-10:20 pm

2 stops21h 40m

$1,067

BelfastSan Francisco

BFS - SFO

BFSSFO

Belfast Intl

Mon 12/8

8:35 am-9:39 pm

2 stops21h 04m

San Francisco

Mon 12/15

7:25 pm-9:10 pm

2 stops17h 45m

$1,165

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Belfast Intl Airport to San Francisco

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

Estimated round-trip price

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

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

Direct flights	None

There are no direct flights from Belfast Intl Airport to San Francisco. There are no popular flight routes from Belfast Intl Airport to San Francisco.

Search flight deals

How far is Belfast Intl to San Francisco by plane?
Belfast Intl and San Francisco are 5016.8 mi apart from one another. By plane, this route typically takes 21h 04m.
When did momondo last update prices for flights from Belfast Intl Airport to San Francisco Airport?
Prices for flights from Belfast Intl Airport to San Francisco Airport were last updated today.
How old do you have to be to fly from Belfast Intl Airport to San Francisco 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 Belfast Intl Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from Belfast Intl Airport to San Francisco?
Price Alerts will notify you by email when the price for flights to San Francisco from Belfast Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Belfast Intl Airport to San Francisco with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Santa Cruz

Carmel-by-the-Sea

Modesto

Sonoma

Bodega Bay

Roseville

Calistoga

Hayward

Big Sur

Santa Clara

Daly City

Berkeley

Fremont

Vallejo

Walnut Creek

Half Moon Bay

Salinas

Turlock

Pacific Grove

Livermore

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Belfast to San Francisco for you.

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

Flights from Belfast to San Francisco with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to San Francisco from Belfast. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Belfast to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.