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Cheap flights from San Francisco to Knock from $917

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 Knock departing on 7/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Find the cheapest flights from San Francisco to Knock

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
8:00 am - 12:35 pm
SFO
-
NOC
20h 35m
2 stops
Aer Lingus Logo
1:05 pm - 1:50 pm
NOC
-
SFO
32h 45m
1 stop
$6,327Aer Lingus
Thu, Jul 9 - Sun, Jul 12
Aer Lingus Logo
10:09 am - 12:35 pm
SFO
-
NOC
42h 26m
2 stops
Aer Lingus Logo
1:05 pm - 11:59 pm
NOC
-
SFO
42h 54m
2 stops
$6,540Aer Lingus
Thu, Jul 9 - Sun, Jul 12
Aer Lingus Logo
7:30 pm - 12:35 pm
SFO
-
NOC
33h 05m
1 stop
Aer Lingus Logo
1:05 pm - 1:50 pm
NOC
-
SFO
32h 45m
1 stop
$7,363Aer Lingus
Thu, Jul 9 - Sun, Jul 12

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British Airways flights from San Francisco to Knock

Our best British Airways deals on San Francisco to Knock flight tickets
British Airways
Sep 6
SFO7:30 pmSan Francisco
33h 05m
1 stop
NOC12:35 pmKnock Intl
Sep 9
NOC1:05 pmKnock Intl
32h 45m
1 stop
SFO1:50 pmSan Francisco
$1,328
British Airways
Sep 6
SFO8:27 amSan Francisco
20h 08m
2 stops
NOC12:35 pmKnock Intl
Sep 9
NOC1:05 pmKnock Intl
36h 35m
1 stop
SFO5:40 pmSan Francisco
$1,332
British Airways
Sep 6
SFO6:36 amSan Francisco
21h 59m
2 stops
NOC12:35 pmKnock Intl
Sep 9
NOC1:05 pmKnock Intl
19h 34m
2 stops
SFO12:39 amSan Francisco
$1,342

Aer Lingus flights from San Francisco to Knock

Our best Aer Lingus deals on San Francisco to Knock flight tickets
Aer Lingus
Jul 9
SFO8:00 amSan Francisco
20h 35m
2 stops
NOC12:35 pmKnock Intl
Jul 12
NOC1:05 pmKnock Intl
32h 45m
1 stop
SFO1:50 pmSan Francisco
$6,327
Aer Lingus
Jul 9
SFO10:09 amSan Francisco
42h 26m
2 stops
NOC12:35 pmKnock Intl
Jul 12
NOC1:05 pmKnock Intl
42h 54m
2 stops
SFO11:59 pmSan Francisco
$6,540
Aer Lingus
Jul 9
SFO7:30 pmSan Francisco
33h 05m
1 stop
NOC12:35 pmKnock Intl
Jul 12
NOC1:05 pmKnock Intl
32h 45m
1 stop
SFO1:50 pmSan Francisco
$7,363

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated May 6, 2026.
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

Cheapest round-trip
Quickest round-trip

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Thu 7/9

8:00 am-12:35 pm

2 stops20h 35m

Knock Intl

Sun 7/12

1:05 pm-1:50 pm

1 stop32h 45m

$6,327

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Thu 7/9

10:09 am-12:35 pm

2 stops42h 26m

Knock Intl

Sun 7/12

1:05 pm-11:59 pm

2 stops42h 54m

$6,540

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Thu 7/9

7:30 pm-12:35 pm

1 stop33h 05m

Knock Intl

Sun 7/12

1:05 pm-1:50 pm

1 stop32h 45m

$7,363
Cheapest one-way

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Tue 7/14

10:15 am-12:35 pm

2 stops18h 20m

$917
Quickest one-way

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Mon 5/11

11:16 am-12:35 pm

2 stops17h 19m

$984

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Mon 6/15

6:00 am-12:35 pm

3 stops46h 35m

$2,101

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Sun 6/14

6:05 pm-12:35 pm

3 stops58h 30m

$2,111

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Thu 6/18

11:51 pm-12:35 pm

3 stops52h 44m

$2,128

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Sat 6/13

6:00 am-12:35 pm

3 stops46h 35m

$2,337

San FranciscoKnock

SFO - NOC

SFONOC

San Francisco

Wed 6/17

6:15 pm-12:35 pm

3 stops58h 20m

$2,531

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Knock from

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

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 airline that flies from San Francisco to Knock Intl?

British Airways is the most popular carrier operating from San Francisco to Knock Intl

What airlines fly to Knock?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Knock from San Francisco according to our data. United Airlines is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Knock. Keep in mind that there are 4 different airlines that fly to Knock on a routine basis, so you have a few additional options to choose from.

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 round-trip 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

Fastest flight time

18h 11m

Direct flights

None
The fastest flight from San Francisco to Knock takes 18h 11m
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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Frequently asked questions about flying from San Francisco to Knock

  • How far is San Francisco to Knock Intl by plane?

    The distance between San Francisco and Knock Intl is about 4974.3 mi. By plane, this route typically takes 18h 11m.

  • 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 are refreshed on a daily basis.

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

Traveling to a place near Knock?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Francisco to Knock. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Knock 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 Knock?

Once you have performed a search for San Francisco to Knock 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 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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