What airlines fly to St. Louis?

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to St. Louis from Killeen according to our data. Southwest is the first choice among our users, with 68% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport?

Prices for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport are updated daily.

How many operators does momondo search for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport?

As of October 2025, there is 1 operator available to choose from for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport.

How old do you have to be to fly from Killeen Fort Hood Regional 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 Killeen Fort Hood Regional Airport to Lambert-St Louis Airport.

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

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$215 Cheap Flights from Killeen to St. Louis in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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 Killeen to St. Louis

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:18 am - 9:56 amGRK-STL

4h 38m1 stop

5:49 pm - 11:24 pmSTL-GRK

5h 35m1 stop

$381American Airlines

Find Deal

Sat, Feb 21 - Tue, Feb 24

12:42 pm - 6:19 pmGRK-STL

5h 37m1 stop

6:04 am - 3:49 pmSTL-GRK

9h 45m2 stops

$386American Airlines

Find Deal

Sat, Feb 21 - Tue, Feb 24

5:18 am - 4:06 pmGRK-STL

10h 48m2 stops

4:44 pm - 11:24 pmSTL-GRK

6h 40m2 stops

$391American Airlines

Find Deal

Sat, Feb 21 - Tue, Feb 24

6:43 pm - 10:24 pmGRK-STL

3h 41m1 stop

5:28 am - 9:08 amSTL-GRK

3h 40m1 stop

$659American Airlines

Find Deal

Tue, Mar 17 - Sun, Mar 22

6:43 pm - 10:24 pmGRK-STL

3h 41m1 stop

6:05 am - 3:48 pmSTL-GRK

9h 43m2 stops

$702American Airlines

Find Deal

Tue, Mar 17 - Sun, Mar 22

12:45 pm - 9:48 pmGRK-STL

9h 03m2 stops

6:05 am - 3:48 pmSTL-GRK

9h 43m2 stops

$825American Airlines

Find Deal

Tue, Mar 17 - Sun, Mar 22

American Airlines flights from Killeen to St. Louis

Our best American Airlines deals on Killeen to St. Louis flight tickets

American Airlines

Feb 21

GRK5:18 amKilleen Fort Hood Regional

4h 38m

1 stop

STL9:56 amLambert-St Louis

Feb 24

STL5:49 pmLambert-St Louis

5h 35m

1 stop

GRK11:24 pmKilleen Fort Hood Regional

$381

Find similar

American Airlines

Feb 21

GRK10:26 amKilleen Fort Hood Regional

5h 40m

1 stop

STL4:06 pmLambert-St Louis

Feb 24

STL6:04 amLambert-St Louis

9h 45m

2 stops

GRK3:49 pmKilleen Fort Hood Regional

$386

Find similar

American Airlines

Feb 21

GRK5:18 amKilleen Fort Hood Regional

10h 48m

2 stops

STL4:06 pmLambert-St Louis

Feb 24

STL4:44 pmLambert-St Louis

6h 40m

2 stops

GRK11:24 pmKilleen Fort Hood Regional

$391

Find similar

Fly from

Fly to

Route

Depart

Return

Price

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 2/21

5:18 am-9:56 am

1 stop4h 38m

Lambert-St Louis

Tue 2/24

5:49 pm-11:24 pm

1 stop5h 35m

$381

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 2/21

12:42 pm-6:19 pm

1 stop5h 37m

Lambert-St Louis

Tue 2/24

6:04 am-3:49 pm

2 stops9h 45m

$386

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 2/21

5:18 am-4:06 pm

2 stops10h 48m

Lambert-St Louis

Tue 2/24

4:44 pm-11:24 pm

2 stops6h 40m

$391

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 3/17

6:43 pm-10:24 pm

1 stop3h 41m

Lambert-St Louis

Sun 3/22

5:28 am-9:08 am

1 stop3h 40m

$659

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 3/17

6:43 pm-10:24 pm

1 stop3h 41m

Lambert-St Louis

Sun 3/22

6:05 am-3:48 pm

2 stops9h 43m

$702

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 3/17

12:45 pm-9:48 pm

2 stops9h 03m

Lambert-St Louis

Sun 3/22

6:05 am-3:48 pm

2 stops9h 43m

$825

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Killeen 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 Saturday when prices can be found for as low as $220. 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 Wednesday because tickets tend to average around $488. 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 Killeen in the morning is the least expensive time of day to depart. momondo users have found prices as low as $381 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $395 per ticket.

When to book flights from Killeen to St. Louis

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

Estimated round-trip price

Cheap Killeen to St. Louis (GRK to STL) flight deals and tips

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

Direct flights	None

There are no direct flights from Killeen to St. Louis. There are no popular flight routes from Killeen to St. Louis.

Search flight deals

How far is Killeen Fort Hood Regional to Lambert-St Louis by plane?
Lambert-St Louis is 670.9 mi away from Killeen Fort Hood Regional. A reasonable flight in good conditions will take 3h 41m.
When did momondo last update prices for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport?
Prices for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport?
As of October 2025, there is 1 operator available to choose from for flights from Killeen Fort Hood Regional Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Killeen Fort Hood Regional 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 Killeen Fort Hood Regional Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Killeen to St. Louis?
momondo data reveals that the most frequently booked airline on the route from Killeen to St. Louis is American Airlines, representing 100% of all bookings.

Best airlines flying from Killeen to St. Louis

Compare and see reviews for airlines that fly from Killeen to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $290	Free Cancellation	Rating 7.2 11,043 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Collinsville

Fenton

St. Peters

Alton

Farmington

Festus

Glencoe

Clayton

Edwardsville

Eureka

Litchfield

Shrewsbury

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Killeen to St. Louis for you.

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

momondo does allow users to show only those flights to St. Louis from Killeen which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Killeen.

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

If you are not ready to book a flight from Killeen to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.