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$441+ Cheap flights from Killeen to St. Louis (GRK - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
GRK — STL
Jun 9 — Jun 161
Tue 6/9
Tue 6/16
1 adult, Economy
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Cheap flight deals from Killeen to St. Louis

Cheapest flights from Killeen to St. Louis
Explore the most affordable flight options available from Killeen to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 10, 2026.

This American Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:44 am
GRK
-
STL
1 stop6h 05m
American Airlines
Mon 5/255:25 am
STL
-
GRK
1 stop4h 09m
American Airlines
Deal found 5/9$503
This American Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:00 am
GRK
-
STL
1 stop3h 54m
American Airlines
Thu 5/215:18 pm
STL
-
GRK
1 stop5h 26m
American Airlines
Deal found 5/9$594
This American Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:21 pm
GRK
-
STL
1 stop4h 38m
American Airlines
Thu 6/115:29 am
STL
-
GRK
1 stop4h 05m
American Airlines
Deal found 5/7$651

Find flight deals from Killeen to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Killeen (GRK) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$503
(American Airlines)

One-way from

$441
(American Airlines)
Provider with most accurate pricing for Killeen Fort Hood Regional-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Killeen Fort Hood Regional-Lambert-St Louis flights.
Search Deals
From Killeen Fort Hood Regional to Lambert-St Louis
Search Deals
One-way flight from Killeen Fort Hood Regional to Lambert-St Louis
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Killeen to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 10, 2026.
Use the filters below to find and compare flights from Killeen to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Thu 5/21

6:44 am-12:49 pm

1 stop6h 05m

Lambert-St Louis

Mon 5/25

5:25 am-9:34 am

1 stop4h 09m

$503
Quickest round-trip

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Sun 6/7

7:21 pm-11:59 pm

1 stop4h 38m

Lambert-St Louis

Thu 6/11

5:29 am-9:34 am

1 stop4h 05m

$651
Cheapest one-way

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Tue 5/26

12:54 pm-8:30 pm

2 stops7h 36m

$446

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Thu 5/28

12:54 pm-11:54 pm

2 stops11h 00m

$473

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Fri 5/29

5:00 am-4:30 pm

2 stops11h 30m

$473
Quickest one-way

KilleenSt. Louis

GRK - STL

GRKSTL

Killeen Fort Hood Regional

Mon 5/25

6:44 am-12:49 pm

1 stop6h 05m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/9

Sorted by cheapest first

Compare providers for flights from Killeen to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Killeen to St. Louis in May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Killeen-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Killeen-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Killeen-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Killeen-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Killeen-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Killeen to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Killeen with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated May 10, 2026.
Read reviews from past customers who have flown American Airlines from Killeen to St. Louis. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,670 reviews

Crew

7.9

Entertainment

6.9

Boarding

7.5

Food

6.4

Overall

7.1

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,670 reviews
American Airlines
7.1
Good
11,670 reviews

Crew

7.9

Entertainment

6.9

Boarding

7.5

Food

6.4

Overall

7.1

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

Related info for your journey

Find useful and relevant information for your journey from Killeen to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Killeen to St. Louis?

    Departing from Killeen to St. Louis will take you 6h 05m. There are 678 mi between Killeen and St. Louis.

  • Can I find deals for flights from Killeen to St. Louis that include hotel bookings?

    Yes. In addition to deals on Killeen to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Killeen to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Killeen to St. Louis.

  • Can I find deals for business class flights from Killeen to St. Louis?

    Yes. Cheapflights offers flight deals from Killeen to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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Top airline flying from Killeen to St. Louis

Discover the top airline that operate flights from Killeen to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$290Average$492FlexibilityNo cancel feeOn-time71%

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