$159 Cheap Flights from Killeen (GRK) to Chicago (ORD)

View $159 flight on Sat, Feb 28, 2026Opens in a new window

Popular airlines from Killeen, TX (GRK-Killeen-Fort Hood Regional) to Chicago O'Hare Intl. Airport (ORD)

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Cheap Flights from Killeen to Chicago (GRK-ORD)

Prices were available within the past 7 days and start at $159 for one-way flights and $317 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Feb 9 - Wed, Feb 11
GRK
Killeen
ORD
Chicago
$317 Roundtrip, found 4 days ago
$317
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Feb 9 from Killeen to Chicago, returning Wed, Feb 11, priced at $317 found 4 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
GRK
Killeen
ORD
Chicago
$327 Roundtrip, found 8 hours ago
$327
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Chicago, returning Mon, Jan 19, priced at $327 found 8 hours ago
American Airlines
Mon, Feb 9 - Wed, Feb 11
GRK
Killeen
ORD
Chicago
$352 Roundtrip, found 4 days ago
$352
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Feb 9 from Killeen to Chicago, returning Wed, Feb 11, priced at $352 found 4 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
GRK
Killeen
ORD
Chicago
$362 Roundtrip, found 8 hours ago
$362
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Chicago, returning Mon, Jan 19, priced at $362 found 8 hours ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
GRK
Killeen
ORD
Chicago
$377 Roundtrip, found 8 hours ago
$377
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Chicago, returning Mon, Jan 19, priced at $377 found 8 hours ago
American Airlines
Mon, Jan 26 - Fri, Jan 30
GRK
Killeen
ORD
Chicago
$387 Roundtrip, found 2 days ago
$387
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Jan 26 from Killeen to Chicago, returning Fri, Jan 30, priced at $387 found 2 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
GRK
Killeen
ORD
Chicago
$397 Roundtrip, found 8 hours ago
$397
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Chicago, returning Mon, Jan 19, priced at $397 found 8 hours ago
American Airlines
Mon, Feb 9 - Wed, Feb 11
GRK
Killeen
ORD
Chicago
$402 Roundtrip, found 4 days ago
$402
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Feb 9 from Killeen to Chicago, returning Wed, Feb 11, priced at $402 found 4 days ago
American Airlines
Fri, Jan 9 - Fri, Jan 23
GRK
Killeen
ORD
Chicago
$407 Roundtrip, found 1 day ago
$407
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Jan 9 from Killeen to Chicago, returning Fri, Jan 23, priced at $407 found 1 day ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
GRK
Killeen
ORD
Chicago
$412 Roundtrip, found 8 hours ago
$412
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, Jan 16 from Killeen to Chicago, returning Mon, Jan 19, priced at $412 found 8 hours ago
Flights from Killeen (GRK) to Chicago (ORD)
Origin airport
Killeen-Fort Hood Regional
Destination airport
O'Hare Intl.
Airlines serving
American Airlines
Roundtrip price
$316
Distance
932 mi

Killeen to Chicago Flights

The cheapest times to fly from Killeen to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Killeen to Chicago are during the month of February. You can find some of the cheapest flights from Killeen to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Killeen to Chicago

Sunday is one of the best days to book for cheap flights from Killeen to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Killeen to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Killeen to Chicago in 2026. You can also book with separate airlines for your outbound and return journeys, from $159 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Killeen to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Killeen to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD) cost?
Snag a cheap one-way flight from $159 or cheap return flight from $317 from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
Flying in February can help you save, as it's the cheapest month for flights between GRK and ORD. You'll usually find the lowest fares during the off-season.
Which airlines fly direct from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
While Killeen, TX (GRK-Killeen-Fort Hood Regional) has no direct flights to O'Hare Intl. Airport (ORD), other airports have nonstop options. Jetting off from Austin-Bergstrom Intl. Airport (AUS) will get you to Chicago without any layovers.
What is the cheapest airline that flies from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from GRK to ORD. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
There aren't any daily nonstop flights from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way in no time at all.
What day of the week has the most flights from GRK to ORD?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
To land at O'Hare Intl. Airport (ORD) without delays, choose a flight that leaves Killeen-Fort Hood Regional Airport (GRK) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD) last-minute?
Booking your ticket from GRK to ORD just before your getaway is usually more expensive. But if there's some wiggle room with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a GRK to ORD flight and hotel package?
Booking a GRK to ORD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Pick from our wide range of accommodations and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Killeen-Fort Hood Regional Airport (GRK) to O'Hare Intl. Airport (ORD)?
Typically, you can modify or cancel your GRK to ORD flight. However, additional fees may apply, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.