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$101+ Cheap flights from Trenton, NJ to St. Louis (TTN - STL)

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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
TTN — STL
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap flight deals from Trenton to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Trenton (TTN) to St. Louis (STL). 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 November 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$129
(Kiwi.com)

One-way from

$101
(Mytrip)

Popular in

November

Cheapest in

March

Average price

$439
Provider with most accurate pricing for Trenton-Mercer-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Trenton-Mercer-Lambert-St Louis flights.
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From Trenton-Mercer to Lambert-St Louis
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One-way flight from Trenton-Mercer to Lambert-St Louis
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Highest demand for flights based on searches. 17% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Trenton to St. Louis

Cheapest flights from Trenton to St. Louis
Explore the most affordable flight options available from Trenton to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2025.

This Booking.com deal was found by Cheapflights users on 11/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:58 pmTTN - STL
1 stop29h 35mFrontier
Wed 12/103:30 pmSTL - TTN
1 stop24h 33mFrontier
Deal found 11/18$144
This Booking.com deal was found by Cheapflights users on 11/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/79:08 pmTTN - STL
1 stop12h 51mFrontier
Wed 12/103:30 pmSTL - TTN
1 stop24h 33mFrontier
Deal found 11/20$199
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:58 pmTTN - STL
1 stop29h 35mFrontier
Sun 12/73:30 pmSTL - TTN
1 stop24h 33mFrontier
Deal found 11/19$211
This Mytrip deal was found by Cheapflights users on 11/19. 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.
Sun 11/309:36 pmTTN - STL
1 stop27h 21mFrontier
Sat 12/63:30 pmSTL - TTN
1 stop7h 29mFrontier
Deal found 11/19$215
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:58 pmTTN - STL
1 stop16h 01mFrontier
Mon 12/83:30 pmSTL - TTN
1 stop7h 29mFrontier
Deal found 11/19$230
This Mytrip deal was found by Cheapflights users on 11/20. 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.
Wed 12/316:10 amTTN - STL
1 stop17h 23mFrontier
Sun 1/44:27 pmSTL - TTN
1 stop26h 59mFrontier
Deal found 11/20$260
This Booking.com deal was found by Cheapflights users on 11/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:58 pmTTN - STL
1 stop29h 35mFrontier
Mon 12/153:30 pmSTL - TTN
1 stop7h 29mFrontier
Deal found 11/20$290
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/149:08 pmTTN - STL
1 stop12h 51mFrontier
Sun 12/214:27 pmSTL - TTN
1 stop6h 32mFrontier
Deal found 11/19$334
This Booking.com deal was found by Cheapflights users on 11/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:59 pmTTN - STL
1 stop25h 34mFrontier
Mon 12/294:27 pmSTL - TTN
1 stop6h 32mFrontier
Deal found 11/19$371

Cheapflights Fare Finder

 
Customize your flight search to find flights from Trenton to St. Louis 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 November 21, 2025.
Use the filters below to find and compare flights from Trenton to St. Louis that are best for you.

Fly from

Trenton

Fly to

St. Louis

Route

Depart

Return

Price

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 2/2

8:27 pm-11:33 pm

1 stop28h 06m

Lambert-St Louis

Mon 2/9

4:45 pm-10:02 pm

1 stop28h 17m

$129

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Wed 1/7

8:00 am-10:33 pm

1 stop15h 33m

Lambert-St Louis

Mon 1/12

5:11 pm-9:44 pm

1 stop27h 33m

$142

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 12/8

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Wed 12/10

3:30 pm-5:03 pm

1 stop24h 33m

$144

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sun 12/7

9:08 pm-8:59 am

1 stop12h 51m

Lambert-St Louis

Wed 12/10

3:30 pm-5:03 pm

1 stop24h 33m

$199

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 12/5

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Sun 12/7

3:30 pm-5:03 pm

1 stop24h 33m

$211

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 1/15

9:59 pm-7:54 am

1 stop10h 55m

Lambert-St Louis

Sat 1/17

5:11 pm-9:04 pm

1 stop26h 53m

$213

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sun 11/30

9:36 pm-11:57 pm

1 stop27h 21m

Lambert-St Louis

Sat 12/6

3:30 pm-11:59 pm

1 stop7h 29m

$215

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 12/4

5:58 pm-8:59 am

1 stop16h 01m

Lambert-St Louis

Mon 12/8

3:30 pm-11:59 pm

1 stop7h 29m

$230

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 1/1

6:10 am-10:33 pm

1 stop17h 23m

Lambert-St Louis

Mon 1/5

10:40 am-11:59 pm

1 stop12h 19m

$273

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 12/12

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Mon 12/15

3:30 pm-11:59 pm

1 stop7h 29m

$290

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 14 results
1
2

Compare providers for flights from Trenton to St. Louis

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 St. Louis in November.
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-St. Louis 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-St. Louis flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Trenton, New Jersey-St. Louis 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-St. Louis 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 St. Louis

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

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

Currently, March is the cheapest month in which you can book a flight from Trenton, New Jersey to St. Louis (average of $60). Flying from Trenton, New Jersey to St. Louis in February is currently the most expensive (average of $226). 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 St. Louis. 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 St. Louis?

    There are many flights that can get you from Trenton, New Jersey to St. Louis in 28h 06m. Fly via Frontier to get the fastest option. The distance between Trenton, New Jersey and St. Louis is about 834 mi.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Trenton, New Jersey to St. Louis (average of $60). Flying from Trenton, New Jersey to St. Louis in February is currently the most expensive (average of $226). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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