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 76% 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 December 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

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Find the cheapest flights from Killeen to St. Louis

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:00 pm - 10:59 pm

GRK

STL

5h 59m1 stop

3:37 pm - 10:43 pm

STL

GRK

7h 06m1 stop

$319American Airlines

Thu, Jan 8 - Sun, Jan 11

5:21 am - 1:03 pm

GRK

STL

7h 42m2 stops

3:37 pm - 10:43 pm

STL

GRK

7h 06m1 stop

$324American Airlines

Thu, Jan 8 - Sun, Jan 11

6:00 am - 10:50 am

GRK

STL

4h 50m1 stop

5:04 pm - 10:43 pm

STL

GRK

5h 39m1 stop

$329American Airlines

Sun, Dec 28 - Wed, Jan 7

6:00 am - 10:50 am

GRK

STL

4h 50m1 stop

6:00 am - 4:07 pm

STL

GRK

10h 07m2 stops

$334American Airlines

Sun, Dec 28 - Fri, Jan 9

6:00 am - 10:50 am

GRK

STL

4h 50m1 stop

11:55 am - 4:07 pm

STL

GRK

4h 12m1 stop

$412American Airlines

Sat, Dec 27 - Thu, Jan 8

7:11 am - 4:23 pm

GRK

STL

9h 12m2 stops

11:55 am - 6:53 pm

STL

GRK

6h 58m1 stop

$417American Airlines

Mon, Dec 29 - Tue, Jan 6

6:00 am - 10:50 am

GRK

STL

4h 50m1 stop

5:16 am - 9:51 am

STL

GRK

4h 35m1 stop

$422American Airlines

Mon, Dec 29 - Mon, Jan 5

6:00 am - 10:50 am

GRK

STL

4h 50m1 stop

11:05 am - 6:53 pm

STL

GRK

7h 48m2 stops

$427American Airlines

Sun, Dec 28 - Tue, Jan 6

11:57 am - 7:31 pm

GRK

STL

7h 34m2 stops

6:00 am - 4:07 pm

STL

GRK

10h 07m2 stops

$463American Airlines

Tue, Dec 30 - Fri, Jan 9

6:00 am - 1:36 pm

GRK

STL

7h 36m2 stops

6:00 am - 4:07 pm

STL

GRK

10h 07m2 stops

$485American Airlines

Sun, Dec 28 - Fri, Jan 9

American Airlines flights from Killeen to St. Louis

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

American Airlines

Jan 8

GRK5:00 pmKilleen Fort Hood Regional

5h 59m

1 stop

STL10:59 pmLambert-St Louis

Jan 11

STL3:37 pmLambert-St Louis

7h 06m

1 stop

GRK10:43 pmKilleen Fort Hood Regional

$319

Find similar

American Airlines

Jan 8

GRK5:21 amKilleen Fort Hood Regional

7h 42m

2 stops

STL1:03 pmLambert-St Louis

Jan 11

STL3:37 pmLambert-St Louis

7h 06m

1 stop

GRK10:43 pmKilleen Fort Hood Regional

$324

Find similar

American Airlines

Dec 28

GRK6:00 amKilleen Fort Hood Regional

4h 50m

1 stop

STL10:50 amLambert-St Louis

Jan 9

STL11:55 amLambert-St Louis

4h 12m

1 stop

GRK4:07 pmKilleen Fort Hood Regional

$329

Find similar

Fly from

Fly to

Route

Depart

Return

Price

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Thu 1/8

5:00 pm-10:59 pm

1 stop5h 59m

Lambert-St Louis

Sun 1/11

3:37 pm-10:43 pm

1 stop7h 06m

$319

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Thu 1/8

5:21 am-1:03 pm

2 stops7h 42m

Lambert-St Louis

Sun 1/11

3:37 pm-10:43 pm

1 stop7h 06m

$324

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

6:00 am-10:50 am

1 stop4h 50m

Lambert-St Louis

Wed 1/7

5:04 pm-10:43 pm

1 stop5h 39m

$329

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

6:00 am-10:50 am

1 stop4h 50m

Lambert-St Louis

Fri 1/9

6:00 am-4:07 pm

2 stops10h 07m

$334

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sat 12/27

6:00 am-10:50 am

1 stop4h 50m

Lambert-St Louis

Thu 1/8

11:55 am-4:07 pm

1 stop4h 12m

$412

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Mon 12/29

7:11 am-4:23 pm

2 stops9h 12m

Lambert-St Louis

Tue 1/6

11:55 am-6:53 pm

1 stop6h 58m

$417

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Mon 12/29

6:00 am-10:50 am

1 stop4h 50m

Lambert-St Louis

Mon 1/5

5:16 am-9:51 am

1 stop4h 35m

$422

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

6:00 am-10:50 am

1 stop4h 50m

Lambert-St Louis

Tue 1/6

11:05 am-6:53 pm

2 stops7h 48m

$427

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 12/30

11:57 am-7:31 pm

2 stops7h 34m

Lambert-St Louis

Fri 1/9

6:00 am-4:07 pm

2 stops10h 07m

$463

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 12/28

6:00 am-1:36 pm

2 stops7h 36m

Lambert-St Louis

Fri 1/9

6:00 am-4:07 pm

2 stops10h 07m

$485

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

Fastest flight time	3h 43m
Direct flights	None

The fastest flight from Killeen to St. Louis takes 3h 43m

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 4h 24m.
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 December 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 11,047 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Wentzville

Collinsville

St. Peters

Alton

Farmington

Clayton

Festus

Glencoe

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.