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$358+ Cheap flights from Trenton, NJ to Seattle (TTN - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SEA
Oct 31 — Nov 71
Fri 10/31
Fri 11/7
1 adult, Economy
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Cheap flight deals from Trenton to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to Seattle (SEA). 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 October 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$737
(Frontier)

One-way from

$358
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$337
Provider with most accurate pricing for Trenton-Mercer-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Trenton-Mercer-Seattle/Tacoma Intl flights.
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From Trenton-Mercer to Seattle/Tacoma Intl
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One-way flight from Trenton-Mercer to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 6% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Trenton to Seattle

Cheapest flights from Trenton to Seattle
Explore the most affordable flight options available from Trenton to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2025.

This Frontier deal was found by Cheapflights users on 9/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/29:29 pmTTN - SEA
2 stops18h 34mFrontier
Sun 11/92:22 pmSEA - TTN
2 stops16h 51mFrontier
Deal found 9/28$737

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to Seattle 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 October 1, 2025.
Use the filters below to find and compare flights from Trenton to Seattle that are best for you.

Fly from

Trenton

Fly to

Seattle

Route

Depart

Return

Price

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Sun 11/2

9:29 pm-1:03 pm

2 stops18h 34m

Seattle/Tacoma Intl

Sun 11/9

2:22 pm-10:13 am

2 stops16h 51m

$737

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Thu 10/9

9:00 am-5:19 pm

3 stops35h 19m

$358

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Compare providers for flights from Trenton to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Trenton, New Jersey-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Trenton, New Jersey-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Trenton, New Jersey-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Trenton to Seattle

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

Cheapflights Insights

Everything you need to know about your flight from Trenton to Seattle

What is the cheapest month to book a flight from Trenton, New Jersey to Seattle?

Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to Seattle (average of $238). Flying from Trenton, New Jersey to Seattle in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Trenton to Seattle. 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 Trenton, New Jersey to Seattle?

    For as low as $737, Frontier can have you in Seattle from Trenton, New Jersey in 18h 34m. The distance from Trenton, New Jersey to Seattle is about 2377 mi.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Trenton, New Jersey to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to Seattle (average of $238). Flying from Trenton, New Jersey to Seattle in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

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