$505 Cheap Flights from Seattle (SEA) to Knock (NOC)

View $505 flight on Sat, Nov 22, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Knock (NOC-Ireland West)

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Cheap Flights from Seattle to Knock (SEA-NOC)

Prices were available within the past 7 days and start at $505 for one-way flights and $689 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$689 Roundtrip, found 3 days ago
$689
Roundtrip
found 3 days ago
Select Air Canada flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $689 found 3 days ago
United
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$691 Roundtrip, found 3 days ago
$691
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $691 found 3 days ago
American Airlines
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$736 Roundtrip, found 3 days ago
$736
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $736 found 3 days ago
American Airlines
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$740 Roundtrip, found 3 days ago
$740
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $740 found 3 days ago
American Airlines
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$746 Roundtrip, found 3 days ago
$746
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $746 found 3 days ago
American Airlines
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$751 Roundtrip, found 3 days ago
$751
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $751 found 3 days ago
Virgin Atlantic
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$764 Roundtrip, found 3 days ago
$764
Roundtrip
found 3 days ago
Select Virgin Atlantic flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $764 found 3 days ago
United
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$787 Roundtrip, found 3 days ago
$787
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $787 found 3 days ago
Air Canada
Tue, Oct 21 - Tue, Nov 4
SEA
Seattle
NOC
Knock
$789 Roundtrip, found 4 days ago
$789
Roundtrip
found 4 days ago
Select Air Canada flight, departing Tue, Oct 21 from Seattle to Knock, returning Tue, Nov 4, priced at $789 found 4 days ago
British Airways
Tue, Nov 4 - Mon, Nov 10
SEA
Seattle
NOC
Knock
$905 Roundtrip, found 3 days ago
$905
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Nov 4 from Seattle to Knock, returning Mon, Nov 10, priced at $905 found 3 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 $966
NOC
Ireland West
CheapestClosest
Average driving time to city center14 min
Flights from $966

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC) cost?
Snag a cheap one-way flight from $505 or cheap return flight from $689 from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC)?
November is the cheapest month to fly from SEA to NOC. Timing your trip outside of the busy season is often the key to scoring lower fares.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to NOC flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC)?
You'll need to catch a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SEA to NOC?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, carrier 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 Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC)?
To arrive at Ireland West Airport (NOC) on schedule, book a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC) last-minute?
Waiting until just before your departure to book your flight from SEA to NOC often results in higher prices. While it's possible to find some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for a better chance of getting a bargain.
Is it cheaper to book a SEA to NOC flight and hotel package?
You can save money by booking a SEA to NOC flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your preferred accommodations and flights, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Ireland West Airport (NOC)?
In most cases, you can reschedule or cancel your SEA to NOC flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need further information, visit our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ireland West
Airlines serving
British Airways
Roundtrip price
$688
Distance
4429 mi

Book with confidence

Book with confidence

Seattle to Knock Flights

The cheapest times to fly from Seattle 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 Seattle to Knock are during the month of November. You can find some of the cheapest flights from Seattle to Knock with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Knock

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to Knock in 2025. You can also book with separate airlines for your outbound and return journeys, from $505 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 Seattle 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 Seattle 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.

 

Seattle to Knock Flights

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*Available to One Key members.