What airlines fly to St. Louis?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to St. Louis from Trenton, New Jersey according to our data. American Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Trenton-Mercer to Lambert-St Louis?

Frontier is the most popular carrier operating from Trenton-Mercer to Lambert-St Louis

When did momondo last update prices for flights from Trenton-Mercer Airport to Lambert-St Louis Airport?

Prices for flights from Trenton-Mercer Airport to Lambert-St Louis Airport are refreshed on a daily basis.

How old do you have to be to fly from Trenton-Mercer Airport to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Trenton-Mercer Airport to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$55 Cheap Flights from Trenton to St. Louis in 2025/26

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Trenton, New Jersey to St. Louis

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:58 pm - 10:33 pmTTN-STL

29h 35m1 stop

3:30 pm - 11:59 pmSTL-TTN

7h 29m1 stop

$117Frontier

Find Deal

Mon, Dec 8 - Sat, Dec 13

5:58 pm - 10:33 pmTTN-STL

29h 35m1 stop

3:30 pm - 11:59 pmSTL-TTN

7h 29m1 stop

$131Frontier

Find Deal

Mon, Dec 8 - Fri, Dec 12

9:59 pm - 10:33 pmTTN-STL

25h 34m1 stop

4:27 pm - 11:59 pmSTL-TTN

6h 32m1 stop

$151Frontier

Find Deal

Tue, Dec 30 - Mon, Jan 5

6:10 am - 8:59 amTTN-STL

27h 49m1 stop

3:30 pm - 11:59 pmSTL-TTN

7h 29m1 stop

$180Frontier

Find Deal

Thu, Dec 11 - Mon, Dec 15

5:58 pm - 10:33 pmTTN-STL

29h 35m1 stop

9:54 am - 11:59 pmSTL-TTN

13h 05m1 stop

$194Frontier

Find Deal

Fri, Dec 12 - Mon, Dec 15

5:58 pm - 10:33 pmTTN-STL

29h 35m1 stop

3:30 pm - 5:03 pmSTL-TTN

24h 33m1 stop

$211Frontier

Find Deal

Fri, Dec 5 - Sun, Dec 7

12:44 pm - 11:57 pmTTN-STL

12h 13m1 stop

3:30 pm - 11:59 pmSTL-TTN

7h 29m1 stop

$221Frontier

Find Deal

Thu, Nov 27 - Thu, Dec 4

4:18 pm - 11:57 pmTTN-STL

8h 39m1 stop

3:30 pm - 11:59 pmSTL-TTN

7h 29m1 stop

$223Frontier

Find Deal

Fri, Nov 28 - Thu, Dec 4

5:58 pm - 10:33 pmTTN-STL

29h 35m1 stop

9:54 am - 5:03 pmSTL-TTN

6h 09m1 stop

$253Frontier

Find Deal

Thu, Dec 4 - Mon, Dec 8

9:59 pm - 7:42 pmTTN-STL

22h 43m1 stop

4:27 pm - 11:59 pmSTL-TTN

6h 32m1 stop

$271Frontier

Find Deal

Thu, Dec 18 - Sat, Dec 20

Frontier flights from Trenton, New Jersey to St. Louis

Our best Frontier deals on Trenton, New Jersey to St. Louis flight tickets

Frontier

Dec 8

TTN5:58 pmTrenton-Mercer

29h 35m

1 stop

STL10:33 pmLambert-St Louis

Dec 13

STL3:30 pmLambert-St Louis

7h 29m

1 stop

TTN11:59 pmTrenton-Mercer

$117

Find similar

Frontier

Dec 8

TTN5:58 pmTrenton-Mercer

29h 35m

1 stop

STL10:33 pmLambert-St Louis

Dec 12

STL3:30 pmLambert-St Louis

7h 29m

1 stop

TTN11:59 pmTrenton-Mercer

$131

Find similar

Frontier

Dec 30

TTN9:59 pmTrenton-Mercer

25h 34m

1 stop

STL10:33 pmLambert-St Louis

Jan 5

STL4:27 pmLambert-St Louis

6h 32m

1 stop

TTN11:59 pmTrenton-Mercer

$151

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 12/8

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Sat 12/13

3:30 pm-11:59 pm

1 stop7h 29m

$117

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 12/8

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Fri 12/12

3:30 pm-11:59 pm

1 stop7h 29m

$131

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 12/30

9:59 pm-10:33 pm

1 stop25h 34m

Lambert-St Louis

Mon 1/5

4:27 pm-11:59 pm

1 stop6h 32m

$151

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 12/11

6:10 am-8:59 am

1 stop27h 49m

Lambert-St Louis

Mon 12/15

3:30 pm-11:59 pm

1 stop7h 29m

$180

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

9:54 am-11:59 pm

1 stop13h 05m

$194

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 11/27

12:44 pm-11:57 pm

1 stop12h 13m

Lambert-St Louis

Thu 12/4

3:30 pm-11:59 pm

1 stop7h 29m

$221

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 11/28

4:18 pm-11:57 pm

1 stop8h 39m

Lambert-St Louis

Thu 12/4

3:30 pm-11:59 pm

1 stop7h 29m

$223

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 12/4

5:58 pm-10:33 pm

1 stop29h 35m

Lambert-St Louis

Mon 12/8

9:54 am-5:03 pm

1 stop6h 09m

$253

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 12/18

9:59 pm-7:42 pm

1 stop22h 43m

Lambert-St Louis

Sat 12/20

4:27 pm-11:59 pm

1 stop6h 32m

$271

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Trenton, New Jersey to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $319. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $439. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Trenton, New Jersey in the morning is the least expensive time of day to depart. momondo users have found prices as low as $344 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $377 per ticket.

When to book flights from Trenton, New Jersey to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Trenton, New Jersey to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Trenton, New Jersey to St. Louis (TTN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Trenton, New Jersey to St. Louis

Direct flights	None

There are no direct flights from Trenton, New Jersey to St. Louis. There are no popular flight routes from Trenton, New Jersey to St. Louis.

Search flight deals

How far is Trenton-Mercer to Lambert-St Louis by plane?
There are 829.7 mi between Trenton-Mercer and Lambert-St Louis. 6h 37m is a normal flight duration for this route.
When did momondo last update prices for flights from Trenton-Mercer Airport to Lambert-St Louis Airport?
Prices for flights from Trenton-Mercer Airport to Lambert-St Louis Airport are refreshed on a daily basis.
How old do you have to be to fly from Trenton-Mercer Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Trenton-Mercer Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Fenton

Collinsville

St. Peters

Alton

Farmington

Festus

Glencoe

Edwardsville

Clayton

Eureka

Litchfield

Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Trenton to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Trenton to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Trenton to St. Louis with flexible booking policies on momondo?

All flight searches from Trenton to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Trenton to St. Louis?

momondo helps you find the best flight between Trenton and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Trenton to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Trenton and alert you when they change.