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Trenton

$90+ Cheap flights from St. Louis to Trenton, NJ (STL - TTN)

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — TTN
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap flight deals from St. Louis to Trenton

Cheapest flights from St. Louis to Trenton
Explore the most affordable flight options available from St. Louis to Trenton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.

This Mytrip deal was found by Cheapflights users on 3/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/144:59 pm
STL
-
TTN
1 stop28h 37m
Frontier
Tue 4/218:00 am
TTN
-
STL
1 stop16h 19m
Frontier
Deal found 3/15$234
This Frontier deal was found by Cheapflights users on 3/11. 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 4/194:59 pm
STL
-
TTN
1 stop6h 00m
Frontier
Mon 4/205:45 pm
TTN
-
STL
1 stop6h 34m
Frontier
Deal found 3/11$256
This Frontier deal was found by Cheapflights users on 3/11. 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.
Sat 4/184:59 pm
STL
-
TTN
1 stop6h 00m
Frontier
Mon 4/205:45 pm
TTN
-
STL
1 stop6h 34m
Frontier
Deal found 3/11$276
This Expedia deal was found by Cheapflights users on 3/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:59 pm
STL
-
TTN
1 stop24h 01m
Frontier
Sun 4/197:14 pm
TTN
-
STL
1 stop29h 05m
Frontier
Deal found 3/14$290
This Frontier deal was found by Cheapflights users on 3/11. 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.
Thu 4/164:59 pm
STL
-
TTN
1 stop6h 00m
Frontier
Mon 4/205:45 pm
TTN
-
STL
1 stop6h 34m
Frontier
Deal found 3/11$310
This Expedia deal was found by Cheapflights users on 3/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:59 pm
STL
-
TTN
1 stop28h 37m
Frontier
Mon 4/206:00 am
TTN
-
STL
1 stop18h 19m
Frontier
Deal found 3/14$325
This Expedia deal was found by Cheapflights users on 3/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:57 pm
STL
-
TTN
1 stop11h 58m
Frontier
Sun 3/224:01 pm
TTN
-
STL
1 stop27h 01m
Frontier
Deal found 3/13$340
This Kiwi.com deal was found by Cheapflights users on 3/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:59 pm
STL
-
TTN
1 stop28h 37m
Multiple Airlines
Mon 4/206:31 pm
TTN
-
STL
2 stops37h 19m
Multiple Airlines
Deal found 3/14$341
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/238:10 pm
STL
-
TTN
1 stop26h 49m
Frontier
Wed 3/256:00 am
TTN
-
STL
1 stop26h 17m
Frontier
Deal found 3/12$350
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:51 pm
STL
-
TTN
1 stop6h 08m
Frontier
Sun 3/224:01 pm
TTN
-
STL
1 stop27h 01m
Frontier
Deal found 3/12$366

Find flight deals from St. Louis to Trenton

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Trenton (TTN). 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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$234
(Mytrip)

One-way from

$90
(Frontier)

Popular in

November

Cheapest in

August

Average price

$339
Provider with most accurate pricing for Lambert-St Louis-Trenton-Mercer flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Trenton-Mercer flights.
Search Deals
From Lambert-St Louis to Trenton-Mercer
Search Deals
One-way flight from Lambert-St Louis to Trenton-Mercer
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Trenton 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 March 16, 2026.
Use the filters below to find and compare flights from St. Louis to Trenton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Tue 4/14

4:59 pm-10:36 pm

1 stop28h 37m

Trenton-Mercer

Tue 4/21

8:00 am-11:19 pm

1 stop16h 19m

$234
Quickest round-trip

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sun 4/19

4:59 pm-11:59 pm

1 stop6h 00m

Trenton-Mercer

Mon 4/20

5:45 pm-11:19 pm

1 stop6h 34m

$256

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sun 4/26

4:59 pm-8:31 pm

1 stop26h 32m

Trenton-Mercer

Tue 4/28

8:00 am-11:19 pm

1 stop16h 19m

$290

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 4/16

4:59 pm-11:59 pm

1 stop6h 00m

Trenton-Mercer

Mon 4/20

5:45 pm-11:19 pm

1 stop6h 34m

$310

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Mon 4/13

4:59 pm-10:36 pm

1 stop28h 37m

Trenton-Mercer

Mon 4/20

6:00 am-11:19 pm

1 stop18h 19m

$325

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 3/20

6:57 pm-7:55 am

1 stop11h 58m

Trenton-Mercer

Sun 3/22

4:01 pm-6:02 pm

1 stop27h 01m

$340

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 3/19

4:51 pm-11:59 pm

1 stop6h 08m

Trenton-Mercer

Sun 3/22

4:01 pm-6:02 pm

1 stop27h 01m

$366

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 6/5

4:19 pm-9:42 am

1 stop16h 23m

Trenton-Mercer

Sun 6/7

8:31 pm-12:21 am

1 stop28h 50m

$401

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sun 5/10

4:19 pm-9:42 am

1 stop16h 23m

Trenton-Mercer

Sun 5/17

4:49 pm-12:21 am

1 stop8h 32m

$499

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 3/27

4:51 pm-2:19 pm

1 stop20h 28m

Trenton-Mercer

Tue 3/31

6:00 am-11:19 pm

1 stop18h 19m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Trenton

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 St. Louis to Trenton in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 St. Louis-Trenton, New Jersey flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Trenton, New Jersey flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Trenton, New Jersey flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Trenton, New Jersey 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 St. Louis-Trenton, New Jersey 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 St. Louis to Trenton

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

What is the cheapest month to book a flight from St. Louis to Trenton, New Jersey?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Trenton, New Jersey (average of $121). Flying from St. Louis to Trenton, New Jersey in March is currently the most expensive (average of $246). 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 St. Louis to Trenton. 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 St. Louis to Trenton, New Jersey?

    Airlines like Frontier fly from St. Louis to Trenton, New Jersey in about 28h 37m. The time it takes to get you to your destination can typically vary by up to . The distance from St. Louis to Trenton, New Jersey is about 834 mi.

  • Can I find deals for flights from St. Louis to Trenton that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Trenton?

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

  • Can I find deals for business class flights from St. Louis to Trenton?

    Yes. Cheapflights offers flight deals from St. Louis to Trenton 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 St. Louis to Trenton, New Jersey?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Trenton, New Jersey (average of $121). Flying from St. Louis to Trenton, New Jersey in March is currently the most expensive (average of $246). 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.

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