$569+ Cheap flights from St. Louis to Killeen (STL - GRK)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — GRK
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Killeen
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to KilleenExplore the most affordable flight options available from St. Louis to Killeen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
Explore the most affordable flight options available from St. Louis to Killeen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 9, 2026.
This American Airlines deal was found by Cheapflights users on 9/8. 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 9/177:00 am -
1 stop5h 17m
Sun 9/207:15 pm -
1 stop4h 28m
Deal found 9/8![American Airlines logo]()
$569
Best flights from St. Louis to KilleenDiscover carefully curated flight deals from St. Louis to Killeen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from St. Louis to Killeen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This American Airlines deal was found by Cheapflights users on 9/8. 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 9/177:00 am -
1 stop5h 17m
Sun 9/207:15 pm -
1 stop4h 28m
Deal found 9/8![American Airlines logo]()
$569
Last-minute flights from St. Louis to KilleenDiscover last-minute flight deals from St. Louis to Killeen. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Killeen. Data last updated September 9, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/8. 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 9/177:00 am -
1 stop5h 17m
Sun 9/207:15 pm -
1 stop4h 28m
Deal found 9/8![American Airlines logo]()
$569
One-way flights from St. Louis to KilleenSearch for one-way flight options from St. Louis to Killeen. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from St. Louis to Killeen. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This American Airlines deal was found by Cheapflights users on 9/4. 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.
Mon 10/123:20 pm -
1 stop5h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![American Airlines logo]()
$720
Find flight deals from St. Louis to Killeen
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Killeen (GRK). 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 September 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $569 (American Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Killeen 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 7,457,451 searches. Data last updated September 9, 2026.
Use the filters below to find and compare flights from St. Louis to Killeen that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisKilleen
STL Lambert-St Louis - GRK Killeen Fort Hood Regional
STLGRK
Lambert-St Louis
Thu 9/17
7:00 am-12:17 pm
1 stop5h 17m
Killeen Fort Hood Regional
Sun 9/20
7:15 pm-11:43 pm
1 stop4h 28m
$569
Quickest round-trip
St. LouisKilleen
STL Lambert-St Louis - GRK Killeen Fort Hood Regional
STLGRK
Lambert-St Louis
Mon 10/12
3:20 pm-8:52 pm
1 stop5h 32m
Killeen Fort Hood Regional
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$720
Sorted by cheapest first
Compare providers for flights from St. Louis to Killeen
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 St. Louis to Killeen in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Killeen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Killeen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Killeen flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Killeen 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 St. Louis-Killeen 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 St. Louis to Killeen
Have a flexible travel schedule? Discover the best time to fly to Killeen from St. Louis with our price prediction graph.
STL-GRK
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 Killeen
Get insights into the airlines that provide service to Killeen. 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 Killeen. Reviews last updated September 9, 2026.
Read reviews from past customers who have flown American Airlines from St. Louis to Killeen. 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.
Boarding
7.5
Crew
7.9
Food
6.4
Comfort
7.2
Entertainment
6.8
Overall
7.1
Reviews
1 / 20
8.0
ExcellentMonica,Nov 2025
JAC - DFW
Boarding
7.5
Crew
7.9
Food
6.4
Comfort
7.2
Entertainment
6.8
Overall
7.1
Reviews
1 / 20
8.0
ExcellentMonica,Nov 2025
JAC - DFW
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Killeen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Killeen?
Book flights to Killeen if you plan to visit one of these locationsTemple
Copperas Cove
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Top airline flying from St. Louis to Killeen
Discover the top airline that operate flights from St. Louis to Killeen. 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 7,457,451 searches. Data last updated September 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$196 | Average$318 | FlexibilityNo cancel fee | On-time71% |