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Cheap flights from San Francisco to Belfast from $397

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 8/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Francisco to Belfast

Cheap round-trip flights

Logo
3:40 pm - 10:25 pmSFO-BFS
22h 45m2 stops
Logo
6:45 am - 7:30 pmBFS-SFO
20h 45m1 stop
$716
Find Deal
Sun, Sep 21 - Mon, Oct 6
Logo
9:20 pm - 10:25 pmSFO-BFS
17h 05m1 stop
Logo
6:10 am - 7:30 pmBFS-SFO
21h 20m1 stop
$749
Find Deal
Sun, Sep 21 - Mon, Oct 6
Logo
5:40 pm - 10:20 pmSFO-BFS
20h 40m2 stops
Logo
7:15 am - 3:55 pmBFS-SFO
16h 40m2 stops
$864
Find Deal
Sun, Sep 21 - Mon, Oct 6
Logo
7:40 pm - 10:20 pmSFO-BFS
18h 40m3 stops
Logo
8:10 am - 4:30 pmBFS-SFO
16h 20m2 stops
$866
Find Deal
Sun, Sep 21 - Mon, Oct 6
Logo
12:15 pm - 10:30 pmSFO-BFS
26h 15m2 stops
Logo
6:10 am - 5:12 pmBFS-SFO
43h 02m3 stops
$1,102
Find Deal
Mon, Aug 25 - Thu, Aug 28
Logo
12:15 pm - 10:30 pmSFO-BFS
26h 15m2 stops
Logo
9:55 am - 10:35 amBFS-SFO
32h 40m2 stops
$1,157
Find Deal
Mon, Aug 25 - Thu, Aug 28
Logo
7:10 am - 10:55 pmSFO-BFS
31h 45m3 stops
Logo
6:10 am - 5:12 pmBFS-SFO
43h 02m3 stops
$1,161
Find Deal
Mon, Aug 25 - Thu, Aug 28

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 July 31, 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

Sun 9/21

3:40 pm-10:25 pm

2 stops22h 45m

Belfast Intl

Mon 10/6

6:45 am-7:30 pm

1 stop20h 45m

$716

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sun 9/21

9:20 pm-10:25 pm

1 stop17h 05m

Belfast Intl

Mon 10/6

6:10 am-7:30 pm

1 stop21h 20m

$749

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sun 9/21

5:40 pm-10:20 pm

2 stops20h 40m

Belfast Intl

Mon 10/6

7:15 am-3:55 pm

2 stops16h 40m

$864

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Sun 9/21

7:40 pm-10:20 pm

3 stops18h 40m

Belfast Intl

Mon 10/6

8:10 am-4:30 pm

2 stops16h 20m

$866

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 8/25

12:15 pm-10:30 pm

2 stops26h 15m

Belfast Intl

Thu 8/28

6:10 am-5:12 pm

3 stops43h 02m

$1,102

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 8/25

12:15 pm-10:30 pm

2 stops26h 15m

Belfast Intl

Thu 8/28

9:55 am-10:35 am

2 stops32h 40m

$1,157

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Mon 8/25

7:10 am-10:55 pm

3 stops31h 45m

Belfast Intl

Thu 8/28

6:10 am-5:12 pm

3 stops43h 02m

$1,161

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 8/14

10:07 pm-8:00 am

2 stops49h 53m

$397

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 8/7

11:20 am-9:00 am

2 stops37h 40m

$444

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Thu 8/7

7:25 pm-9:40 am

3 stops30h 15m

$452

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
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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 $588. 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 $622.

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

The cheapest day to depart on your flight to Belfast Intl Airport is on a Tuesday when prices can be found for as low as $690. This is often the case because there is less demand to fly during this day of the week. 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 Intl Airport for around $1,423.

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

At noon is the cheapest time of day to fly from San Francisco to Belfast Intl Airport when you can find flight prices for as low as $819. Flying to Belfast Intl Airport at noon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Belfast Intl Airport is in the morning when prices are around $1,295.

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

Best Price Found

$397

Fastest flight time

17h 05m

Direct flights

None
The best one-way flight to Belfast Intl Airport from San Francisco in the past 72 hours is $397. The best round-trip flight deal from San Francisco to Belfast Intl Airport found on momondo in the last 72 hours is $716.
The fastest flight from San Francisco to Belfast Intl Airport takes 17h 05m
There are no direct flights from San Francisco to Belfast Intl Airport. Popular non-direct route for this connection is San Francisco Airport - 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. In terms of flight time, this usually takes a little over 17h 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 $588Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
American AirlinesPriceFrom $635Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Belfast?

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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