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$182+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — SEA
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
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 August 11, 2025.

Round-trip from

$441
(CheapOair)

One-way from

$182
(Frontier)

Popular in

December

Cheapest in

September

Average price

$487
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 ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 11, 2025.

This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1812:48 pmTTN - SEA
2 stops14h 46mFrontier
Thu 8/213:25 pmSEA - TTN
2 stops15h 43mFrontier
Deal found 8/10$419
This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:30 amTTN - SEA
2 stops17h 00mFrontier
Sat 9/137:00 amSEA - TTN
2 stops23h 32mFrontier
Deal found 8/10$441
This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2210:53 amTTN - SEA
2 stops27h 52mFrontier
Sun 8/246:17 amSEA - TTN
2 stops23h 57mFrontier
Deal found 8/10$449
This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:30 pmTTN - SEA
2 stops15h 00mFrontier
Sun 9/216:12 amSEA - TTN
2 stops26h 22mFrontier
Deal found 8/10$476
This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:30 amTTN - SEA
2 stops17h 00mFrontier
Sun 9/216:12 amSEA - TTN
2 stops26h 22mFrontier
Deal found 8/10$535
This CheapOair deal was found by Cheapflights users on 8/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1512:48 pmTTN - SEA
2 stops14h 46mFrontier
Sun 8/176:25 amSEA - TTN
2 stops25h 57mFrontier
Deal found 8/10$622

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 August 11, 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

Thu 9/11

10:30 am-12:30 am

2 stops17h 00m

Seattle/Tacoma Intl

Sat 9/13

7:00 am-9:32 am

2 stops23h 32m

$441

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Fri 8/22

10:53 am-11:45 am

2 stops27h 52m

Seattle/Tacoma Intl

Sun 8/24

6:17 am-9:14 am

2 stops23h 57m

$449

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Fri 9/19

12:30 pm-12:30 am

2 stops15h 00m

Seattle/Tacoma Intl

Sun 9/21

6:12 am-11:34 am

2 stops26h 22m

$476

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Thu 9/18

10:30 am-12:30 am

2 stops17h 00m

Seattle/Tacoma Intl

Sun 9/21

6:12 am-11:34 am

2 stops26h 22m

$535

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Mon 9/8

12:30 pm-12:30 am

2 stops15h 00m

$182

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Thu 9/11

10:30 am-12:30 am

2 stops17h 00m

$186

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Fri 8/22

10:53 am-11:45 am

2 stops27h 52m

$202

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Thu 10/9

4:25 pm-7:33 am

2 stops18h 08m

$212

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Fri 11/7

10:11 am-8:42 pm

2 stops37h 31m

$222

TrentonSeattle

TTN - SEA

TTNSEA

Trenton-Mercer

Fri 9/12

12:30 pm-12:30 am

2 stops15h 00m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 13 results
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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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated August 11, 2025.
Peruse reviews from past customers who have flown with Frontier from Trenton to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.8
Fair
3,221 reviews

Comfort

5.6

Entertainment

4.5

Food

4.7

Boarding

6.1

Crew

6.7

Overall

5.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.
Frontier
5.8
Fair
3,221 reviews
Frontier
5.8
Fair
3,221 reviews

Comfort

5.6

Entertainment

4.5

Food

4.7

Boarding

6.1

Crew

6.7

Overall

5.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

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, 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

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