HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$136+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SEA
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Trenton to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Trenton to Seattle

One-way flights from Trenton to Seattle
Search for one-way flight options from Trenton to Seattle. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

This Trip.com deal was found by Cheapflights users on 12/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/148:00 amTTN - SEA
2 stops30h 09mFrontier
Deal found 12/25$136
This Trip.com deal was found by Cheapflights users on 12/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/78:00 amTTN - SEA
2 stops36h 37mFrontier
Deal found 12/25$225

Find 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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Popular in

December

Cheapest in

October

Average price

$543
Provider with most accurate pricing for Trenton-Mercer-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Trenton-Mercer-Seattle/Tacoma Intl flights.
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 28, 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

Wed 1/14

8:00 am-11:09 am

2 stops30h 09m

$136

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Wed 1/7

8:00 am-5:37 pm

2 stops36h 37m

$225

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Trenton, New Jersey-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, October is the cheapest month in which you can book a flight from Trenton, New Jersey to Seattle (average of $148). Flying from Trenton, New Jersey to Seattle in April is currently the most expensive (average of $237). 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.

  • 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, October is the cheapest month in which you can book a flight from Trenton, New Jersey to Seattle (average of $148). Flying from Trenton, New Jersey to Seattle in April is currently the most expensive (average of $237). 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?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Fife
Aberdeen
Shoreline
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Trenton to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Seattle flights
Newark to Seattle flights
LaGuardia to Seattle flights
Philadelphia to Seattle flights
John F Kennedy Intl to Portland flights
Newark to Portland flights
LaGuardia to Portland flights
Philadelphia to Portland flights
Newark to Spokane flights
John F Kennedy Intl to Spokane flights
LaGuardia to Spokane flights
Philadelphia to Spokane flights
LaGuardia to Pasco flights
Philadelphia to Pasco flights
John F Kennedy Intl to Pasco flights
Newark to Pasco flights
Atlantic City to Portland flights
Philadelphia to Bellingham flights
John F Kennedy Intl to Wenatchee flights
John F Kennedy Intl to Bellingham flights
Philadelphia to Pullman flights
LaGuardia to Yakima flights
Atlantic City to Seattle flights
LaGuardia to Bellingham flights
John F Kennedy Intl to Yakima flights
John F Kennedy Intl to Walla Walla flights
Newark to Yakima flights
Newark to Pullman flights
Newark to Bellingham flights
Newark to Walla Walla flights
Philadelphia to Wenatchee flights
Newark to Wenatchee flights
Philadelphia to Yakima flights
Trenton to Portland flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.