What is the cheapest airline that flies from San Francisco to Belfast?

KLM is the most popular carrier operating from San Francisco to Belfast

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

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

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

As of August 2025, there are 2 operators available to choose from for flights from San Francisco Airport to Belfast.

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

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.

What documentation or ID do you need to fly to Belfast?

The required travel and health documents for your Belfast 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$360 Cheap Flights from San Francisco to Belfast in 2025

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Find the cheapest flights from San Francisco to Belfast

Round-trip

One-way

Last minute

Cheap round-trip flights

7:20 pm - 5:40 pmSFO-BHD

14h 20m1 stop

11:25 am - 11:09 pmBHD-SFO

19h 44m2 stops

$641British Airways

Find Deal

Sun, Oct 19 - Tue, Nov 4

10:25 am - 11:55 amSFO-BHD

17h 30m2 stops

6:50 am - 5:59 pmBHD-SFO

19h 09m2 stops

$643American Airlines

Find Deal

Wed, Oct 8 - Wed, Oct 15

6:00 am - 10:35 amSFO-BHD

20h 35m2 stops

8:20 pm - 5:59 pmBHD-SFO

29h 39m2 stops

$655British Airways

Find Deal

Tue, Oct 7 - Tue, Oct 14

1:45 pm - 9:15 pmSFO-BHD

23h 30m1 stop

5:20 pm - 11:50 amBHD-SFO

26h 30m1 stop

$668Virgin Atlantic

Find Deal

Sun, Oct 19 - Tue, Nov 4

1:45 pm - 4:55 pmSFO-BHD

19h 10m1 stop

6:30 am - 11:45 amBHD-SFO

13h 15m1 stop

$706Delta

Find Deal

Sun, Oct 5 - Thu, Oct 16

10:55 am - 4:55 pmSFO-BHD

22h 00m2 stops

5:25 pm - 11:45 amBHD-SFO

26h 20m1 stop

$711Delta

Find Deal

Sun, Oct 5 - Wed, Oct 15

8:55 am - 9:00 pmSFO-BHD

28h 05m2 stops

6:30 am - 11:50 amBHD-SFO

13h 20m1 stop

$741Virgin Atlantic

Find Deal

Wed, Dec 3 - Sun, Dec 7

4:52 pm - 5:30 pmSFO-BHD

16h 38m2 stops

10:00 am - 10:23 pmBHD-SFO

20h 23m2 stops

$1,382American Airlines

Find Deal

Mon, Sep 22 - Wed, Sep 24

1:33 am - 1:30 pmSFO-BHD

27h 57m2 stops

6:00 pm - 3:35 pmBHD-SFO

29h 35m2 stops

$2,231Aer Lingus

Find Deal

Wed, Dec 17 - Tue, Jan 6

1:33 am - 1:30 pmSFO-BHD

27h 57m2 stops

10:40 am - 3:00 pmBHD-SFO

36h 20m1 stop

$2,488Aer Lingus

Find Deal

Wed, Dec 17 - Tue, Jan 6

Virgin Atlantic flights from San Francisco to Belfast

Our best Virgin Atlantic deals on San Francisco to Belfast flight tickets

Virgin Atlantic

Oct 19

SFO1:45 pmSan Francisco

23h 30m

1 stop

BHD9:15 pmBelfast City

Nov 4

BHD5:20 pmBelfast City

26h 30m

1 stop

SFO11:50 amSan Francisco

$668

Find similar

Virgin Atlantic

Dec 3

SFO8:55 amSan Francisco

28h 05m

2 stops

BHD9:00 pmBelfast City

Dec 7

BHD6:30 amBelfast City

13h 20m

1 stop

SFO11:50 amSan Francisco

$741

Find similar

Delta flights from San Francisco to Belfast

Our best Delta deals on San Francisco to Belfast flight tickets

Delta

Oct 5

SFO1:45 pmSan Francisco

19h 10m

1 stop

BHD4:55 pmBelfast City

Oct 16

BHD6:30 amBelfast City

13h 15m

1 stop

SFO11:45 amSan Francisco

$706

Find similar

Delta

Oct 5

SFO10:55 amSan Francisco

22h 00m

2 stops

BHD4:55 pmBelfast City

Oct 15

BHD5:25 pmBelfast City

26h 20m

1 stop

SFO11:45 amSan Francisco

$711

Find similar

Delta

Oct 5

SFO1:45 pmSan Francisco

23h 30m

1 stop

BHD9:15 pmBelfast City

Oct 17

BHD6:30 amBelfast City

25h 03m

2 stops

SFO11:33 pmSan Francisco

$716

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/19

7:20 pm-5:40 pm

1 stop14h 20m

Belfast City

Tue 11/4

11:25 am-11:09 pm

2 stops19h 44m

$641

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/8

10:25 am-11:55 am

2 stops17h 30m

Belfast City

Wed 10/15

6:50 am-5:59 pm

2 stops19h 09m

$643

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 10/7

6:00 am-10:35 am

2 stops20h 35m

Belfast City

Tue 10/14

8:20 pm-5:59 pm

2 stops29h 39m

$655

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/19

1:45 pm-9:15 pm

1 stop23h 30m

Belfast City

Tue 11/4

5:20 pm-11:50 am

1 stop26h 30m

$668

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/5

1:45 pm-4:55 pm

1 stop19h 10m

Belfast City

Thu 10/16

6:30 am-11:45 am

1 stop13h 15m

$706

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sun 10/5

10:55 am-4:55 pm

2 stops22h 00m

Belfast City

Wed 10/15

5:25 pm-11:45 am

1 stop26h 20m

$711

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/3

8:55 am-9:00 pm

2 stops28h 05m

Belfast City

Sun 12/7

6:30 am-11:50 am

1 stop13h 20m

$741

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 9/22

4:52 pm-5:30 pm

2 stops16h 38m

Belfast City

Wed 9/24

10:00 am-10:23 pm

2 stops20h 23m

$1,382

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/17

1:33 am-1:30 pm

2 stops27h 57m

Belfast City

Tue 1/6

6:00 pm-3:35 pm

2 stops29h 35m

$2,231

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/17

1:33 am-1:30 pm

2 stops27h 57m

Belfast City

Tue 1/6

10:40 am-3:00 pm

1 stop36h 20m

$2,488

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

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

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

Prices

Airlines

What is the cheapest month to fly to Belfast?

In general, October is the cheapest month to fly from San Francisco to Belfast. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $588. If you don’t want to visit Belfast in October, then you should wait until April to fly from San Francisco, when ticket prices are also cheap, with an average price of $622.

What is the cheapest day to depart on your flight to Belfast?

The cheapest day to depart from San Francisco to Belfast is on a Tuesday when prices can be found for as low as $690. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to Belfast for around $1,423.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest San Francisco to Belfast flights are usually those with departure times at noon. Our users have found flights to Belfast at noon for as low as $819. Try not to purchase tickets in the morning because they tend to be around $1,295. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap San Francisco to Belfast flight deals and tips

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

Direct flights	None

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

Search flight deals

How far is San Francisco to Belfast by plane?
The straight-line distance from San Francisco to Belfast is 5028.1 mi. By plane, this route typically takes 14h 20m.
When did momondo last update prices for flights from San Francisco Airport to Belfast?
Prices for flights from San Francisco Airport to Belfast refresh daily.
How many operators does momondo search for flights from San Francisco Airport to Belfast?
As of August 2025, there are 2 operators available to choose from for flights from San Francisco Airport to Belfast.
How old do you have to be to fly from San Francisco Airport to Belfast?
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.
What documentation or ID do you need to fly to Belfast?
The required travel and health documents for your Belfast 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from San Francisco to Belfast

Compare and see reviews for airlines that fly from San Francisco to Belfast with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $588	Free Cancellation	Rating 6.7 7,309 reviews		Search British Airways flights
American Airlines	PriceFrom $635	Free Cancellation	Rating 7.2 10,000 reviews		Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Francisco to Belfast. Millions of users trust and use momondo every year so you are in good hands.

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?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from San Francisco.

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

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