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Cheap flights from San Francisco to Knock from €848

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Knock departing on 22/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

Aer Lingus Logo
17:40 - 12:35SFO-NOC
34h 55m2 stops
Aer Lingus Logo
13:05 - 15:55NOC-SFO
34h 50m2 stops
€848Aer Lingus
Find Deal
Mon, 22 Sep - Mon, 29 Sep
Aer Lingus Logo
17:40 - 12:35SFO-NOC
34h 55m2 stops
Aer Lingus Logo
13:05 - 13:50NOC-SFO
32h 45m1 stop
€917Aer Lingus
Find Deal
Mon, 22 Sep - Mon, 29 Sep
Aer Lingus Logo
19:20 - 12:35SFO-NOC
33h 15m1 stop
Aer Lingus Logo
13:05 - 13:50NOC-SFO
32h 45m1 stop
€990Aer Lingus
Find Deal
Mon, 22 Sep - Mon, 29 Sep
British Airways Logo
10:22 - 12:35SFO-NOC
18h 13m2 stops
British Airways Logo
13:05 - 00:15NOC-SFO
19h 10m2 stops
€1,566British Airways
Find Deal
Thu, 18 Sep - Sun, 28 Sep

Aer Lingus flights from San Francisco to Knock

Our best Aer Lingus deals on San Francisco to Knock flight tickets
Aer Lingus
22 Sept
SFO17:40San Francisco
34h 55m
2 stops
NOC12:35Knock Intl
29 Sept
NOC13:05Knock Intl
34h 50m
2 stops
SFO15:55San Francisco
€848
Find similar
Aer Lingus
22 Sept
SFO17:40San Francisco
34h 55m
2 stops
NOC12:35Knock Intl
29 Sept
NOC13:05Knock Intl
32h 45m
1 stop
SFO13:50San Francisco
€917
Find similar
Aer Lingus
22 Sept
SFO19:20San Francisco
33h 15m
1 stop
NOC12:35Knock Intl
29 Sept
NOC13:05Knock Intl
32h 45m
1 stop
SFO13:50San Francisco
€990
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from San Francisco to Knock 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 13,528 searches. Data last updated 24 August 2025.
Use the filters below to find and compare flights from San Francisco to Knock that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Mon 22/9

17:40-12:35

2 stops34h 55m

Knock Intl

Mon 29/9

13:05-15:55

2 stops34h 50m

€848

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Mon 22/9

17:40-12:35

2 stops34h 55m

Knock Intl

Mon 29/9

13:05-13:50

1 stop32h 45m

€917

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Mon 22/9

19:20-12:35

1 stop33h 15m

Knock Intl

Mon 29/9

13:05-13:50

1 stop32h 45m

€990

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Thu 18/9

10:22-12:35

2 stops18h 13m

Knock Intl

Sun 28/9

13:05-00:15

2 stops19h 10m

€1,566

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from San Francisco to Knock

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

Cheap San Francisco to Knock (SFO to NOC) flight deals and tips

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

Direct flights

None
There are no direct flights from San Francisco to Knock. There are no popular flight routes from San Francisco to Knock.
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  • How far is San Francisco to Knock Intl by plane?

    Knock Intl is 8004.9 km away from San Francisco. In terms of flight time, this usually takes a little over 18h 13m.

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

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

  • How old do you have to be to fly from San Francisco Airport to Knock Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to Knock Intl Airport.

  • What documentation or ID do you need to fly to Knock Intl Airport?

    The necessary travel and health documents for your Knock Intl 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 licence 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 San Francisco to Knock?

    Confirm your travel details to search for the latest offers for flights from San Francisco to Knock. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from San Francisco to Knock with momondo?

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Travelling to a place near Knock?

Book flights to Knock if you plan to visit one of these locations
Sligo
Westport
Carrick-on-Shannon
Belmullet
Newport

Why use momondo?

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

Finding the right flight to Knock from San Francisco is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Knock quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Knock from San Francisco with this policy.

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

Once all potential San Francisco to Knock flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Knock, momondo offers a useful price alert feature which will track prices for flights to Knock from San Francisco and alert you when they change.

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