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 34% 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.

$88 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.

7:36 pm - 11:33 pm

TTN

STL

28h 57m1 stop

5:42 pm - 10:02 pm

STL

TTN

27h 20m1 stop

$140Frontier

Fri, Feb 6 - Mon, Feb 9

3:21 pm - 11:33 pm

TTN

STL

9h 12m1 stop

5:42 pm - 8:36 am

STL

TTN

13h 54m1 stop

$152Frontier

Tue, Jan 20 - Sat, Jan 24

9:59 pm - 7:13 am

TTN

STL

10h 14m1 stop

9:07 am - 4:18 pm

STL

TTN

6h 11m1 stop

$162Frontier

Thu, Mar 5 - Mon, Mar 9

2:32 pm - 10:33 pm

TTN

STL

9h 01m1 stop

5:06 pm - 11:59 pm

STL

TTN

5h 53m1 stop

$164Frontier

Thu, Jan 8 - Mon, Jan 12

9:59 pm - 9:45 am

TTN

STL

12h 46m1 stop

10:40 am - 11:59 pm

STL

TTN

12h 19m1 stop

$208Frontier

Thu, Jan 1 - Mon, Jan 5

9:21 pm - 10:33 pm

TTN

STL

26h 12m1 stop

5:11 pm - 9:04 pm

STL

TTN

26h 53m1 stop

$225Frontier

Mon, Jan 5 - Wed, Jan 14

8:00 am - 10:33 pm

TTN

STL

15h 33m1 stop

5:11 pm - 9:04 pm

STL

TTN

26h 53m1 stop

$226Frontier

Wed, Jan 7 - Wed, Jan 14

9:59 pm - 10:33 pm

TTN

STL

25h 34m1 stop

9:07 am - 6:16 pm

STL

TTN

8h 09m1 stop

$270Frontier

Tue, Dec 30 - Fri, Jan 2

9:06 pm - 9:21 am

TTN

STL

13h 15m1 stop

5:42 pm - 7:32 pm

STL

TTN

24h 50m1 stop

$279Frontier

Sun, Jan 25 - Sun, Feb 1

9:59 pm - 10:33 pm

TTN

STL

25h 34m1 stop

4:27 pm - 8:26 pm

STL

TTN

26h 59m1 stop

$288Frontier

Sun, Dec 21 - Sun, Jan 4

Frontier flights from Trenton, New Jersey to St. Louis

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

Frontier

Feb 6

TTN7:36 pmTrenton-Mercer

28h 57m

1 stop

STL11:33 pmLambert-St Louis

Feb 9

STL5:42 pmLambert-St Louis

27h 20m

1 stop

TTN10:02 pmTrenton-Mercer

$140

Find similar

Frontier

Jan 20

TTN3:21 pmTrenton-Mercer

9h 12m

1 stop

STL11:33 pmLambert-St Louis

Jan 24

STL5:42 pmLambert-St Louis

13h 54m

1 stop

TTN8:36 amTrenton-Mercer

$152

Find similar

Frontier

Mar 5

TTN9:59 pmTrenton-Mercer

10h 14m

1 stop

STL7:13 amLambert-St Louis

Mar 9

STL9:07 amLambert-St Louis

6h 11m

1 stop

TTN4:18 pmTrenton-Mercer

$162

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

Fri 2/6

7:36 pm-11:33 pm

1 stop28h 57m

Lambert-St Louis

Mon 2/9

5:42 pm-10:02 pm

1 stop27h 20m

$140

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 1/20

3:21 pm-11:33 pm

1 stop9h 12m

Lambert-St Louis

Sat 1/24

5:42 pm-8:36 am

1 stop13h 54m

$152

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 3/5

9:59 pm-7:13 am

1 stop10h 14m

Lambert-St Louis

Mon 3/9

9:07 am-4:18 pm

1 stop6h 11m

$162

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 1/8

2:32 pm-10:33 pm

1 stop9h 01m

Lambert-St Louis

Mon 1/12

5:06 pm-11:59 pm

1 stop5h 53m

$164

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 1/1

9:59 pm-9:45 am

1 stop12h 46m

Lambert-St Louis

Mon 1/5

10:40 am-11:59 pm

1 stop12h 19m

$208

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Mon 1/5

9:21 pm-10:33 pm

1 stop26h 12m

Lambert-St Louis

Wed 1/14

5:11 pm-9:04 pm

1 stop26h 53m

$225

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Wed 1/7

8:00 am-10:33 pm

1 stop15h 33m

Lambert-St Louis

Wed 1/14

5:11 pm-9:04 pm

1 stop26h 53m

$226

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Tue 12/30

9:59 pm-10:33 pm

1 stop25h 34m

Lambert-St Louis

Fri 1/2

9:07 am-6:16 pm

1 stop8h 09m

$270

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sun 1/25

9:06 pm-9:21 am

1 stop13h 15m

Lambert-St Louis

Sun 2/1

5:42 pm-7:32 pm

1 stop24h 50m

$279

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sun 12/21

9:59 pm-10:33 pm

1 stop25h 34m

Lambert-St Louis

Sun 1/4

4:27 pm-8:26 pm

1 stop26h 59m

$288

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 $311. 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 $442. 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. In the evening 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	9h 01m
Direct flights	None

The fastest flight from Trenton, New Jersey to St. Louis takes 9h 01m

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. 9h 01m 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

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

St. Peters

Collinsville

Alton

Farmington

Festus

Clayton

Glencoe

Edwardsville

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.