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$377+ Cheap flights from San Francisco (SFO) to Northern Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BFS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from San Francisco to Northern Ireland

Keep the following information in mind while searching for San Francisco to Northern Ireland flight deals. Data was last updated July 3, 2025.

Round-trip from

$636
(Cheapflightsfares)

One-way from

$377
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$1,140
From San Francisco to Northern Ireland
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One-way flight from San Francisco to Northern Ireland
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Highest demand for flights based on searches. 13% potential increase in price ($138 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from San Francisco to Northern Ireland

Cheapest flights from San Francisco to Northern Ireland
Explore the most affordable flight options available from San Francisco to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:20 pmSFO - BHD
1 stop15h 20mBritish Airways
Tue 10/216:35 amBHD - SFO
1 stop18h 50mBritish Airways
Deal found 7/3$636
This American Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:55 amSFO - BHD
2 stops18h 35mAmerican Airlines
Tue 10/219:35 amBHD - SFO
2 stops20h 32mAmerican Airlines
Deal found 7/3$648
This Virgin Atlantic deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:50 pmSFO - BHD
1 stop19h 00mVirgin Atlantic
Sun 12/75:20 pmBHD - SFO
1 stop26h 30mVirgin Atlantic
Deal found 7/1$740
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:00 amSFO - BHD
2 stops27h 00mDelta
Sun 12/75:20 pmBHD - SFO
1 stop26h 30mDelta
Deal found 7/2$745
This Mytrip deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/187:10 amSFO - BFS
3 stops25h 30mMultiple Airlines
Thu 7/316:00 amBFS - SFO
3 stops35h 30mMultiple Airlines
Deal found 7/3$1,420
This Mytrip deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/187:10 amSFO - BHD
3 stops29h 15mMultiple Airlines
Thu 7/316:50 pmBHD - SFO
3 stops34h 35mMultiple Airlines
Deal found 7/3$1,891
This KLM deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:45 pmSFO - BHD
1 stop19h 10mKLM
Fri 10/245:25 pmBHD - SFO
1 stop26h 20mKLM
Deal found 7/1$4,558
This AranGrant deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:30 pmSFO - BHD
1 stop20h 15mIberia
Thu 10/306:35 amBHD - SFO
1 stop16h 25mIberia
Deal found 7/1$4,835

Cheapflights Fare Finder

Customize your flight search to find flights from San Francisco to Northern Ireland 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, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
Use the filters below to find and compare flights from San Francisco to Northern Ireland that are best for you.

Fly from

San Francisco

Fly to

Northern Ireland

Route

Depart

Return

Price

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

7:20 pm-6:40 pm

1 stop15h 20m

Belfast City

Tue 10/21

6:35 am-5:25 pm

1 stop18h 50m

$636

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 10/15

10:55 am-1:30 pm

2 stops18h 35m

Belfast City

Tue 10/21

9:35 am-10:07 pm

2 stops20h 32m

$648

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/3

1:50 pm-9:00 pm

1 stop23h 10m

Belfast City

Sun 12/7

5:20 pm-11:50 am

1 stop26h 30m

$740

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Wed 12/3

11:05 am-4:50 pm

2 stops21h 45m

Belfast City

Sun 12/7

6:30 am-11:50 am

1 stop13h 20m

$845

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 7/18

7:10 am-4:40 pm

3 stops25h 30m

Belfast Intl

Thu 7/31

6:00 am-9:30 am

3 stops35h 30m

$1,420

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Fri 7/18

7:10 am-8:25 pm

3 stops29h 15m

Belfast City

Thu 7/31

6:50 pm-9:25 pm

3 stops34h 35m

$1,891

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Tue 10/7

1:45 pm-4:55 pm

1 stop19h 10m

Belfast City

Fri 10/24

5:25 pm-11:45 am

1 stop26h 20m

$4,558

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Mon 10/20

4:30 pm-8:45 pm

1 stop20h 15m

Belfast City

Thu 10/30

6:35 am-4:00 pm

1 stop16h 25m

$4,835

San FranciscoBelfast

SFO - BFS

SFOBFS

San Francisco

Fri 8/15

10:07 pm-7:45 am

2 stops49h 38m

$377

San FranciscoBelfast

SFO - BHD

SFOBHD

San Francisco

Sat 12/20

1:50 pm-9:00 pm

1 stop23h 10m

$878

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 12 results
1
2

Best time to book a flight from San Francisco to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Northern Ireland

What is the cheapest month to book a flight from San Francisco to Northern Ireland?

Currently, February is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $657). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to NIR?

Find hourly flight availability from San Francisco to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to Northern Ireland as you normally would.

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Northern Ireland. Reviews last updated July 3, 2025.
Get a feel of what it's like to fly with Delta, KLM, and Virgin Atlantic from San Francisco to Northern Ireland by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
654 reviews
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,819 reviews
Delta
8.0
Very good
7,970 reviews

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Francisco to Northern Ireland?

    Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Northern Ireland. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

  • What are the most popular routes from San Francisco to Northern Ireland?

    The most popular flight routes from San Francisco to Northern Ireland are San Francisco - Belfast Intl, San Francisco - Belfast City and San Francisco - Campbeltown Machrihanish.

  • Can I find deals for flights from San Francisco to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on San Francisco to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Northern Ireland.

  • Can I find deals for business class flights from San Francisco to Northern Ireland?

    Yes. Cheapflights offers flight deals from San Francisco to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Northern Ireland?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Northern Ireland (average of $657). Flying from San Francisco to Northern Ireland in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Northern Ireland

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Top 2 airlines flying from San Francisco to Northern Ireland

Discover the top 2 airlines that operate flights from San Francisco to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$493Average$827FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$588Average$754FlexibilityNo cancel feeOn-time70%

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