What airlines fly to St. Louis?

American Airlines, United Airlines and Southwest 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.

$77 Cheap Flights from Trenton to St. Louis in 2025/26

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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.

6:00 am - 12:46 pmTTN-STL

7h 46m1 stop

4:33 pm - 11:59 pmSTL-TTN

6h 26m1 stop

$154Frontier

Find Deal

Thu, Oct 23 - Sat, Oct 25

6:00 am - 12:46 pmTTN-STL

7h 46m1 stop

4:33 pm - 11:59 pmSTL-TTN

6h 26m1 stop

$169Frontier

Find Deal

Thu, Oct 23 - Sat, Oct 25

6:00 am - 5:10 pmTTN-STL

12h 10m1 stop

4:33 pm - 11:59 pmSTL-TTN

6h 26m1 stop

$204Frontier

Find Deal

Fri, Oct 17 - Sat, Oct 18

6:00 am - 12:46 pmTTN-STL

7h 46m1 stop

1:41 pm - 11:59 pmSTL-TTN

9h 18m1 stop

$246Frontier

Find Deal

Thu, Oct 23 - Sun, Oct 26

6:00 am - 5:10 pmTTN-STL

12h 10m1 stop

1:41 pm - 11:59 pmSTL-TTN

9h 18m1 stop

$257Frontier

Find Deal

Fri, Oct 17 - Sun, Oct 19

8:00 am - 3:38 pmTTN-STL

8h 38m1 stop

7:52 pm - 10:14 amSTL-TTN

13h 22m2 stops

$261Frontier

Find Deal

Sat, Oct 18 - Sat, Oct 25

6:00 am - 5:10 pmTTN-STL

12h 10m1 stop

1:41 pm - 11:59 pmSTL-TTN

9h 18m1 stop

$294Frontier

Find Deal

Fri, Oct 17 - Sun, Oct 19

6:00 am - 5:10 pmTTN-STL

12h 10m1 stop

7:52 pm - 10:14 amSTL-TTN

13h 22m2 stops

$299Frontier

Find Deal

Fri, Oct 17 - Wed, Oct 22

6:00 am - 1:17 pmTTN-STL

8h 17m1 stop

10:25 am - 11:59 pmSTL-TTN

12h 34m1 stop

$301Frontier

Find Deal

Fri, Oct 31 - Mon, Nov 3

6:00 am - 5:10 pmTTN-STL

12h 10m1 stop

4:51 pm - 10:14 amSTL-TTN

16h 23m2 stops

$312Frontier

Find Deal

Fri, Oct 17 - Sat, Oct 18

Frontier flights from Trenton, New Jersey to St. Louis

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

Frontier

Oct 23

TTN6:00 amTrenton-Mercer

7h 46m

1 stop

STL12:46 pmLambert-St Louis

Oct 25

STL4:33 pmLambert-St Louis

6h 26m

1 stop

TTN11:59 pmTrenton-Mercer

$154

Find similar

Frontier

Oct 23

TTN6:00 amTrenton-Mercer

7h 46m

1 stop

STL12:46 pmLambert-St Louis

Oct 25

STL4:33 pmLambert-St Louis

6h 26m

1 stop

TTN11:59 pmTrenton-Mercer

$169

Find similar

Frontier

Oct 17

TTN6:00 amTrenton-Mercer

12h 10m

1 stop

STL5:10 pmLambert-St Louis

Oct 18

STL4:33 pmLambert-St Louis

6h 26m

1 stop

TTN11:59 pmTrenton-Mercer

$204

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

Thu 10/23

6:00 am-12:46 pm

1 stop7h 46m

Lambert-St Louis

Sat 10/25

4:33 pm-11:59 pm

1 stop6h 26m

$154

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 10/23

6:00 am-12:46 pm

1 stop7h 46m

Lambert-St Louis

Sat 10/25

4:33 pm-11:59 pm

1 stop6h 26m

$169

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/17

6:00 am-5:10 pm

1 stop12h 10m

Lambert-St Louis

Sat 10/18

4:33 pm-11:59 pm

1 stop6h 26m

$204

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Thu 10/23

6:00 am-12:46 pm

1 stop7h 46m

Lambert-St Louis

Sun 10/26

1:41 pm-11:59 pm

1 stop9h 18m

$246

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/17

6:00 am-5:10 pm

1 stop12h 10m

Lambert-St Louis

Sun 10/19

1:41 pm-11:59 pm

1 stop9h 18m

$257

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Sat 10/18

8:00 am-3:38 pm

1 stop8h 38m

Lambert-St Louis

Sat 10/25

7:52 pm-10:14 am

2 stops13h 22m

$261

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/17

6:00 am-5:10 pm

1 stop12h 10m

Lambert-St Louis

Sun 10/19

1:41 pm-11:59 pm

1 stop9h 18m

$294

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/17

6:00 am-5:10 pm

1 stop12h 10m

Lambert-St Louis

Wed 10/22

7:52 pm-10:14 am

2 stops13h 22m

$299

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/31

6:00 am-1:17 pm

1 stop8h 17m

Lambert-St Louis

Mon 11/3

10:25 am-11:59 pm

1 stop12h 34m

$301

TrentonSt. Louis

TTN - STL

TTNSTL

Trenton-Mercer

Fri 10/17

6:00 am-5:10 pm

1 stop12h 10m

Lambert-St Louis

Sat 10/18

4:51 pm-10:14 am

2 stops16h 23m

$312

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 $325. 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 $434. 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 $347 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. 7h 46m 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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Eureka

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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.