$435 Cheap Flights from Killeen (GRK) to Philadelphia (PHL)

View $435 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from Killeen, TX (GRK-Killeen-Fort Hood Regional) to Philadelphia Intl. Airport (PHL)

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Cheap Flights from Killeen to Philadelphia (GRK-PHL)

Prices were available within the past 7 days and start at $435 for one-way flights and $529 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Dec 9 - Wed, Dec 24
GRK
Killeen
PHL
Philadelphia
$529 Roundtrip, found 5 days ago
$529
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Dec 9 from Killeen to Philadelphia, returning Wed, Dec 24, priced at $529 found 5 days ago
American Airlines
Thu, Dec 25 - Wed, Dec 31
GRK
Killeen
PHL
Philadelphia
$615 Roundtrip, found 4 days ago
$615
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Dec 25 from Killeen to Philadelphia, returning Wed, Dec 31, priced at $615 found 4 days ago
American Airlines
Thu, Nov 27 - Tue, Dec 2
GRK
Killeen
PHL
Philadelphia
$617 Roundtrip, found 1 hour ago
$617
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Thu, Nov 27 from Killeen to Philadelphia, returning Tue, Dec 2, priced at $617 found 1 hour ago
American Airlines
Fri, Nov 28 - Tue, Dec 2
GRK
Killeen
PHL
Philadelphia
$628 Roundtrip, found 1 hour ago
$628
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Nov 28 from Killeen to Philadelphia, returning Tue, Dec 2, priced at $628 found 1 hour ago
American Airlines
Thu, Nov 27 - Mon, Dec 1
GRK
Killeen
PHL
Philadelphia
$630 Roundtrip, found 1 hour ago
$630
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Thu, Nov 27 from Killeen to Philadelphia, returning Mon, Dec 1, priced at $630 found 1 hour ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
GRK
Killeen
PHL
Philadelphia
$633 Roundtrip, found 1 day ago
$633
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 25 from Killeen to Philadelphia, returning Tue, Dec 2, priced at $633 found 1 day ago
American Airlines
Sat, Nov 8 - Thu, Nov 27
GRK
Killeen
PHL
Philadelphia
$637 Roundtrip, found 5 days ago
$637
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Nov 8 from Killeen to Philadelphia, returning Thu, Nov 27, priced at $637 found 5 days ago
American Airlines
Mon, Nov 10 - Thu, Nov 27
GRK
Killeen
PHL
Philadelphia
$641 Roundtrip, found 5 days ago
$641
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Nov 10 from Killeen to Philadelphia, returning Thu, Nov 27, priced at $641 found 5 days ago
American Airlines
Sat, Nov 15 - Tue, Dec 2
GRK
Killeen
PHL
Philadelphia
$647 Roundtrip, found 3 days ago
$647
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Nov 15 from Killeen to Philadelphia, returning Tue, Dec 2, priced at $647 found 3 days ago
American Airlines
Tue, Nov 25 - Tue, Dec 2
GRK
Killeen
PHL
Philadelphia
$650 Roundtrip, found 1 hour ago
$650
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Tue, Nov 25 from Killeen to Philadelphia, returning Tue, Dec 2, priced at $650 found 1 hour ago

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $651
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $651
Flights from Killeen (GRK) to Philadelphia (PHL)
Origin airport
Killeen-Fort Hood Regional
Destination airport
Philadelphia Intl.
Roundtrip price
$529
Distance
1403 mi

Killeen to Philadelphia Flights

The cheapest times to fly from Killeen to Philadelphia

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 Philadelphia are during the month of December. You can find some of the cheapest flights from Killeen to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Killeen to Philadelphia

Sunday is one of the best days to book for cheap flights from Killeen to Philadelphia: 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 Philadelphia

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 Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $435 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 Philadelphia 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 Philadelphia 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 Philadelphia Intl. Airport (PHL) cost?
Grab a cheap one-way flight from $435 or cheap return flight from $529 from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL)?
December is the least expensive month to fly from GRK to PHL. Planning your trip for the off-season is often the key to finding better fares.
Which airlines fly direct from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL)?
There are no direct routes from Killeen, TX (GRK-Killeen-Fort Hood Regional) to Philadelphia Intl. Airport (PHL). However, there are other airports that offer nonstop flights. Board your plane at Austin-Bergstrom Intl. Airport (AUS) and head straight to Philadelphia without any detours.
What is the cheapest airline that flies from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from GRK to PHL. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL)?
You'll have to hop on a flight with a layover when traveling from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from GRK to PHL?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*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 Philadelphia Intl. Airport (PHL)?
Select a flight from Killeen-Fort Hood Regional Airport (GRK) to Philadelphia Intl. Airport (PHL) that takes off before 3 PM to reduce the risk of cancellations and delays. Later departures have a 22% higher chance of being canceled, on average.**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 Philadelphia Intl. Airport (PHL) last-minute?
Waiting until just before your departure to book your flight from GRK to PHL generally means paying more. While you might find some last-minute deals, there's no guarantee. Be flexible with your travel plans for the best chance of landing a bargain.
Is it cheaper to book a GRK to PHL flight and hotel package?
Securing a GRK to PHL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our impressive range of hotels and then add activities, flights and car rentals 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 Philadelphia Intl. Airport (PHL)?
In most cases, you can reschedule or cancel your GRK to PHL flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you'd like more details, go to our Customer Service portal.

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*Available to One Key members.