$565 Cheap Flights from San Francisco (SFO) to Knock (NOC)

View $565 flight on Sat, Sep 13, 2025Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Knock (NOC-Ireland West)

Cheap Flights from San Francisco to Knock (SFO-NOC)

Prices were available within the past 7 days and start at $565 for one-way flights and $872 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Nov 30 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$872 Roundtrip, found 6 days ago
$872
Roundtrip
found 6 days ago
Select United flight, departing Sun, Nov 30 from San Francisco to Knock, returning Tue, Dec 9, priced at $872 found 6 days ago
American Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$917 Roundtrip, found 6 days ago
$917
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $917 found 6 days ago
United
Sun, Nov 30 - Sun, Dec 7
SFO
San Francisco
NOC
Knock
$922 Roundtrip, found 6 days ago
$922
Roundtrip
found 6 days ago
Select United flight, departing Sun, Nov 30 from San Francisco to Knock, returning Sun, Dec 7, priced at $922 found 6 days ago
Alaska Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$922 Roundtrip, found 6 days ago
$922
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $922 found 6 days ago
British Airways
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$924 Roundtrip, found 6 days ago
$924
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $924 found 6 days ago
Alaska Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$927 Roundtrip, found 6 days ago
$927
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $927 found 6 days ago
American Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$932 Roundtrip, found 6 days ago
$932
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $932 found 6 days ago
Alaska Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$937 Roundtrip, found 6 days ago
$937
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $937 found 6 days ago
Aer Lingus
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$948 Roundtrip, found 6 days ago
$948
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $948 found 6 days ago
American Airlines
Wed, Dec 3 - Tue, Dec 9
SFO
San Francisco
NOC
Knock
$950 Roundtrip, found 6 days ago
$950
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Dec 3 from San Francisco to Knock, returning Tue, Dec 9, priced at $950 found 6 days ago

Alternative airports near Knock

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ireland West NOC. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $1,108
NOC
Ireland West
CheapestClosest
Average driving time to city center14 min
Flights from $1,108
Flights from San Francisco (SFO) to Knock (NOC)
Origin airport
San Francisco Intl.
Destination airport
Ireland West
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$871
Distance
4984 mi

San Francisco to Knock Flights

The cheapest times to fly from San Francisco to Knock

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Knock are during the month of November. You can find some of the cheapest flights from San Francisco to Knock with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Knock

Sunday is one of the best days to book for cheap flights from San Francisco to Knock: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Knock

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Knock in 2025. You can also book with separate airlines for your outbound and return journeys, from $565 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Knock flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Knock airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC) cost?
Get a cheap one-way flight from $565 or cheap return flight from $872 from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC)?
Traveling in November may help you find better deals, as it's the cheapest month for flights between SFO and NOC. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SFO to NOC flight.
How many flights per day from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC)?
There aren't any daily nonstop flights available from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from SFO to NOC?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC)?
To avoid potential delays on the San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC) route, fly before 3 PM. Flights after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC) last-minute?
Booking your plane ticket from SFO to NOC just before your journey is typically more expensive. However, if there's some wiggle room with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a SFO to NOC flight and hotel package?
Compared with arranging flights and hotels separately, booking a SFO to NOC flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the stress out of planning your trip. Just secure your flights and choose from our wide range of stays, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Ireland West Airport (NOC)?
Usually, it's possible to reschedule or cancel your SFO to NOC flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.