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Trenton

$82+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — TTN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$155
(Frontier)

One-way from

$82
(Frontier)

Popular in

November

Cheapest in

April

Average price

$277
From Lambert-St Louis to Trenton-Mercer
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One-way flight from Lambert-St Louis to Trenton-Mercer
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Highest demand for flights based on searches. 10% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/11. 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.
Fri 10/39:32 pmSTL - TTN
1 stop12h 28mFrontier
Sun 10/510:30 amTTN - STL
1 stop5h 34mFrontier
Deal found 9/11$155
This CheapOair deal was found by Cheapflights users on 9/10. 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 9/254:00 pmSTL - TTN
1 stop18h 34mFrontier
Sun 9/2810:30 amTTN - STL
1 stop5h 34mFrontier
Deal found 9/10$163
This CheapOair deal was found by Cheapflights users on 9/10. 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 10/24:00 pmSTL - TTN
1 stop18h 34mFrontier
Mon 10/611:45 amTTN - STL
1 stop9h 52mFrontier
Deal found 9/10$165
This CheapOair deal was found by Cheapflights users on 9/10. 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 10/106:05 pmSTL - TTN
1 stop28h 54mFrontier
Sun 10/126:00 amTTN - STL
1 stop7h 46mFrontier
Deal found 9/10$167
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/261:57 pmSTL - TTN
1 stop20h 03mFrontier
Sun 9/2810:30 amTTN - STL
1 stop5h 34mFrontier
Deal found 9/9$203
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/184:33 pmSTL - TTN
1 stop6h 26mFrontier
Thu 10/236:00 amTTN - STL
1 stop7h 46mFrontier
Deal found 9/10$215
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:55 pmSTL - TTN
2 stops14h 05mFrontier
Mon 9/2911:45 amTTN - STL
2 stops22h 21mFrontier
Deal found 9/10$245
This CheapOair deal was found by Cheapflights users on 9/10. 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 10/246:42 pmSTL - TTN
1 stop28h 17mFrontier
Sun 10/264:25 pmTTN - STL
1 stop25h 45mFrontier
Deal found 9/10$247
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:55 pmSTL - TTN
2 stops12h 37mFrontier
Mon 10/611:45 amTTN - STL
2 stops22h 22mFrontier
Deal found 9/10$269
This Frontier deal was found by Cheapflights users on 9/11. 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.
Fri 9/267:55 pmSTL - TTN
2 stops14h 05mFrontier
Mon 9/2911:45 amTTN - STL
2 stops22h 21mFrontier
Deal found 9/11$279
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/191:41 pmSTL - TTN
1 stop9h 18mFrontier
Thu 10/236:00 amTTN - STL
1 stop7h 46mFrontier
Deal found 9/10$286
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/121:41 pmSTL - TTN
1 stop9h 18mFrontier
Thu 10/164:25 pmTTN - STL
1 stop25h 45mFrontier
Deal found 9/10$296

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 September 11, 2025.
Use the filters below to find and compare flights from St. Louis to Trenton that are best for you.

Fly from

St. Louis

Fly to

Trenton

Route

Depart

Return

Price

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 10/3

9:32 pm-11:00 am

1 stop12h 28m

Trenton-Mercer

Sun 10/5

10:30 am-3:04 pm

1 stop5h 34m

$155

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 10/2

4:00 pm-11:34 am

1 stop18h 34m

Trenton-Mercer

Sun 10/5

10:30 am-3:04 pm

1 stop5h 34m

$163

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 9/25

4:00 pm-11:34 am

1 stop18h 34m

Trenton-Mercer

Sun 9/28

10:30 am-3:04 pm

1 stop5h 34m

$163

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Thu 10/2

4:00 pm-11:34 am

1 stop18h 34m

Trenton-Mercer

Mon 10/6

11:45 am-8:37 pm

1 stop9h 52m

$165

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 10/10

6:05 pm-11:59 pm

1 stop28h 54m

Trenton-Mercer

Sun 10/12

6:00 am-12:46 pm

1 stop7h 46m

$167

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 9/26

1:57 pm-11:00 am

1 stop20h 03m

Trenton-Mercer

Sun 9/28

10:30 am-3:04 pm

1 stop5h 34m

$203

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sat 10/18

4:33 pm-11:59 pm

1 stop6h 26m

Trenton-Mercer

Thu 10/23

6:00 am-12:46 pm

1 stop7h 46m

$215

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Sat 9/27

7:55 pm-11:00 am

2 stops14h 05m

Trenton-Mercer

Mon 9/29

11:45 am-9:06 am

2 stops22h 21m

$245

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Fri 10/24

6:42 pm-11:59 pm

1 stop28h 17m

Trenton-Mercer

Sun 10/26

4:25 pm-5:10 pm

1 stop25h 45m

$247

St. LouisTrenton

STL - TTN

STLTTN

Lambert-St Louis

Wed 10/1

7:55 pm-9:32 am

2 stops12h 37m

Trenton-Mercer

Mon 10/6

11:45 am-9:07 am

2 stops22h 22m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 21 results
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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 $73). Flying from St. Louis to Trenton, New Jersey in June is currently the most expensive (average of $153). 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 12h 28m. 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 $73). Flying from St. Louis to Trenton, New Jersey in June is currently the most expensive (average of $153). 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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Alternative routes for St. Louis to Trenton

See prices for flight routes from nearby airports that may be better suited for you.
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