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 33% 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.

$84 Cheap Flights from Trenton to St. Louis in 2026

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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.

11:54 am - 11:59 pm

TTN

STL

13h 05m

1 stop

3:49 pm - 11:39 pm

STL

TTN

6h 50m

1 stop

$138Frontier

Mon, Feb 23 - Wed, Feb 25

12:45 pm - 11:59 pm

TTN

STL

12h 14m

1 stop

12:36 pm - 11:39 pm

STL

TTN

10h 03m

1 stop

$175Frontier

Sat, Feb 21 - Sat, Feb 28

6:00 am - 11:59 pm

TTN

STL

18h 59m

1 stop

3:49 pm - 11:39 pm

STL

TTN

6h 50m

1 stop

$186Frontier

Mon, Feb 23 - Tue, Feb 24

6:00 am - 5:57 am

TTN

STL

24h 57m

1 stop

4:51 pm - 11:59 pm

STL

TTN

6h 08m

1 stop

$205Frontier

Sat, Mar 7 - Tue, Mar 10

10:49 am - 11:19 pm

TTN

STL

13h 30m

1 stop

4:55 pm - 11:59 pm

STL

TTN

6h 04m

1 stop

$236Frontier

Thu, May 7 - Sun, May 10

9:06 pm - 9:21 am

TTN

STL

13h 15m

1 stop

3:49 pm - 11:39 pm

STL

TTN

6h 50m

1 stop

$255Frontier

Sun, Feb 8 - Tue, Feb 10

10:49 am - 11:19 pm

TTN

STL

13h 30m

1 stop

4:55 pm - 4:52 pm

STL

TTN

22h 57m

1 stop

$287Frontier

Thu, Apr 16 - Sun, Apr 19

10:31 am - 11:59 pm

TTN

STL

14h 28m

1 stop

3:49 pm - 11:39 pm

STL

TTN

6h 50m

1 stop

$306Frontier

Thu, Feb 19 - Fri, Feb 20

5:37 pm - 11:19 pm

TTN

STL

6h 42m

1 stop

4:55 pm - 11:59 pm

STL

TTN

6h 04m

1 stop

$310Frontier

Fri, May 15 - Sun, May 17

6:00 am - 7:22 am

TTN

STL

26h 22m

1 stop

8:10 pm - 11:59 pm

STL

TTN

26h 49m

1 stop

$339Frontier

Thu, Mar 19 - Mon, Mar 23

Frontier flights from Trenton, New Jersey to St. Louis

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

Frontier

Feb 23

TTN11:54 amTrenton-Mercer

13h 05m

1 stop

STL11:59 pmLambert-St Louis

Feb 25

STL3:49 pmLambert-St Louis

6h 50m

1 stop

TTN11:39 pmTrenton-Mercer

$138

Frontier

Feb 21

TTN12:45 pmTrenton-Mercer

12h 14m

1 stop

STL11:59 pmLambert-St Louis

Feb 28

STL12:36 pmLambert-St Louis

10h 03m

1 stop

TTN11:39 pmTrenton-Mercer

$175

Frontier

Feb 23

TTN6:00 amTrenton-Mercer

18h 59m

1 stop

STL11:59 pmLambert-St Louis

Feb 24

STL3:49 pmLambert-St Louis

6h 50m

1 stop

TTN11:39 pmTrenton-Mercer

$186

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 2/23

11:54 am-11:59 pm

1 stop13h 05m

Lambert-St Louis

Wed 2/25

3:49 pm-11:39 pm

1 stop6h 50m

$138

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sat 2/21

12:45 pm-11:59 pm

1 stop12h 14m

Lambert-St Louis

Sat 2/28

12:36 pm-11:39 pm

1 stop10h 03m

$175

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 2/23

6:00 am-11:59 pm

1 stop18h 59m

Lambert-St Louis

Tue 2/24

3:49 pm-11:39 pm

1 stop6h 50m

$186

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sat 3/7

6:00 am-5:57 am

1 stop24h 57m

Lambert-St Louis

Tue 3/10

4:51 pm-11:59 pm

1 stop6h 08m

$205

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 5/7

10:49 am-11:19 pm

1 stop13h 30m

Lambert-St Louis

Sun 5/10

4:55 pm-11:59 pm

1 stop6h 04m

$236

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sun 2/8

9:06 pm-9:21 am

1 stop13h 15m

Lambert-St Louis

Tue 2/10

3:49 pm-11:39 pm

1 stop6h 50m

$255

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 4/16

10:49 am-11:19 pm

1 stop13h 30m

Lambert-St Louis

Sun 4/19

4:55 pm-4:52 pm

1 stop22h 57m

$287

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 2/19

10:31 am-11:59 pm

1 stop14h 28m

Lambert-St Louis

Fri 2/20

3:49 pm-11:39 pm

1 stop6h 50m

$306

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 5/15

5:37 pm-11:19 pm

1 stop6h 42m

Lambert-St Louis

Sun 5/17

4:55 pm-11:59 pm

1 stop6h 04m

$310

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 3/19

6:00 am-7:22 am

1 stop26h 22m

Lambert-St Louis

Mon 3/23

8:10 pm-11:59 pm

1 stop26h 49m

$339

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 $314. 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 $441. 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 $343 when looking at flights departing in the morning. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $370 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

Fastest flight time	6h 42m
Direct flights	None

The fastest flight from Trenton, New Jersey to St. Louis takes 6h 42m

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 42m 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.

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Hermann

Fairview Heights

Maryland Heights

Florissant

O'Fallon

Collinsville

Fenton

St. Peters

Wentzville

Alton

Farmington

Clayton

Edwardsville

Eureka

Festus

Glencoe

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.