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$1,043+ Cheap flights from Seattle (SEA) to Newcastle (NTL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — NTL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Seattle to Newcastle

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Newcastle (NTL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$1,043
(FlightHub)

Popular in

December

Cheapest in

February

Average price

$1,051
From Seattle/Tacoma Intl to Newcastle Williamtown
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($148 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Seattle to Newcastle

Best flights from Seattle to Newcastle
Discover carefully curated flight deals from Seattle to Newcastle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/13:40 pmSEA - NTL
2 stops29h 40mMultiple Airlines
Sat 2/147:50 amNTL - SEA
2 stops20h 41mMultiple Airlines
Deal found 9/9$1,043
This Gotogate deal was found by Cheapflights users on 9/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/19:00 amSEA - NTL
3 stops35h 45mAir New Zealand
Sat 2/148:15 amNTL - SEA
3 stops30h 01mAir New Zealand
Deal found 9/9$1,546

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Newcastle 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 September 11, 2025.
Use the filters below to find and compare flights from Seattle to Newcastle that are best for you.

Fly from

Seattle

Fly to

Newcastle

Route

Depart

Return

Price

SeattleNewcastle

SEA - NTL

SEANTL

Seattle/Tacoma Intl

Sun 2/1

3:40 pm-4:20 pm

2 stops29h 40m

Newcastle Williamtown

Sat 2/14

7:50 am-9:31 am

2 stops20h 41m

$1,043

SeattleNewcastle

SEA - NTL

SEANTL

Seattle/Tacoma Intl

Sun 2/1

9:00 am-3:45 pm

3 stops35h 45m

Newcastle Williamtown

Sat 2/14

8:15 am-7:16 pm

3 stops30h 01m

$1,546

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Best time to book a flight from Seattle to Newcastle

Have a flexible travel schedule? Discover the best time to fly to Newcastle from Seattle 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.

Related info for your journey

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

  • How long is the flight from Seattle to Newcastle?

    A quick flight from Seattle to Newcastle can take about 35h 45m. Air New Zealand provides one of the quickest options available for as low as $1,546. The distance from Seattle to Newcastle is about 7662 mi.

  • Can I find deals for flights from Seattle to Newcastle that include hotel bookings?

    Yes. In addition to deals on Seattle to Newcastle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Newcastle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Newcastle.

  • Can I find deals for business class flights from Seattle to Newcastle?

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

See more FAQs

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