$34 Cheap flight deals from Philadelphia (ILG) to Castle Rock (DEN)

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This Weekend's Flight Deals from Philadelphia to Castle Rock

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 15 - Mon, Nov 17
PHL
Philadelphia Intl.
DEN
Denver Intl.
$322 Roundtrip, just found
$322
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Nov 15 from Philadelphia Intl. to Denver Intl., returning Mon, Nov 17, priced at $322 just found
Sun, Nov 16 - Sat, Nov 22
TTN
Mercer
DEN
Denver Intl.
$469 Roundtrip, found 1 day ago
$469
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 16 from Mercer to Denver Intl., returning Sat, Nov 22, priced at $469 found 1 day ago
Sun, Nov 16 - Thu, Nov 27
ABE
Lehigh Valley Intl.
DEN
Denver Intl.
$581 Roundtrip, found 6 days ago
$581
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Nov 16 from Lehigh Valley Intl. to Denver Intl., returning Thu, Nov 27, priced at $581 found 6 days ago

Airfares from $34 One Way, $79 Round Trip from Philadelphia to Castle Rock

Prices starting at $79 for return flights and $34 for one-way flights to Castle Rock were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Dec 21 - Thu, Dec 25
PHL
Philadelphia
DEN
Denver
$79 Roundtrip, found 18 hours ago
$79
Roundtrip
found 18 hours ago
Select Frontier Airlines flight, departing Sun, Dec 21 from Philadelphia to Denver, returning Thu, Dec 25, priced at $79 found 18 hours ago
Fri, Jan 9 - Sun, Jan 11
TTN
Trenton
DEN
Denver
$148 Roundtrip, found 5 days ago
$148
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Trenton to Denver, returning Sun, Jan 11, priced at $148 found 5 days ago
Wed, Dec 10 - Mon, Dec 15
TTN
Trenton
DEN
Denver
$208 Roundtrip, found 1 day ago
$208
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 10 from Trenton to Denver, returning Mon, Dec 15, priced at $208 found 1 day ago
Mon, Dec 8 - Wed, Dec 17
ABE
Allentown
DEN
Denver
$233 Roundtrip, found 11 hours ago
$233
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Mon, Dec 8 from Allentown to Denver, returning Wed, Dec 17, priced at $233 found 11 hours ago
Thu, Nov 27 - Tue, Dec 2
PHL
Philadelphia
DEN
Denver
$240 Roundtrip, found 12 hours ago
$240
Roundtrip
found 12 hours ago
Select Delta flight, departing Thu, Nov 27 from Philadelphia to Denver, returning Tue, Dec 2, priced at $240 found 12 hours ago

Castle Rock economy flight packages

Price found within the past 48 hours. Click for updated prices.
Bluegreen's StreamSide at Vail
4.5-star property

Bluegreen's StreamSide at Vail

9/10 Wonderful! (72 reviews)

Dec 21 - Dec 24

3 night stay

Philadelphia (PHL) to Denver (DEN)

Frontier Airlines • Coach

Denver (DEN) to Philadelphia (PHL)

Southwest Airlines • Coach
Save 100% on your flight
Price was $1,032, price is now $650 per person
$650
per person
found 16 hours ago
Everything about this place was great, from the staff (Eli) to the spacious rooms, fully equipped kitchen, bedsand pillows, and the daily deer sightings from the balconies. The only negative was the intermittent wi-fi, but not a problem aince i had my hotspot. I believe the property is scheduled for a full renovation, but we loved it just the way it was.

Reviewed on Jun 25, 2023

Hyatt Vacation Club at The Ranahan
4.0-star property

Hyatt Vacation Club at The Ranahan

9.6/10 Exceptional! (1,547 reviews)

Dec 21 - Dec 24

3 night stay

Philadelphia (PHL) to Denver (DEN)

Frontier Airlines • Coach

Denver (DEN) to Philadelphia (PHL)

Southwest Airlines • Coach
Save 100% on your flight
Price was $1,333, price is now $783 per person
$783
per person
found 16 hours ago
Nice people and amenities

Reviewed on Sep 20, 2025

Timbers and Lone Eagle by Keystone Resort
4.0-star property

Timbers and Lone Eagle by Keystone Resort

9.2/10 Wonderful! (57 reviews)

Dec 21 - Dec 24

3 night stay

Philadelphia (PHL) to Denver (DEN)

Frontier Airlines • Coach

Denver (DEN) to Philadelphia (PHL)

Southwest Airlines • Coach
Save 100% on your flight
Price was $4,425, price is now $2,740 per person
$2,740
per person
found 16 hours ago
Skiing. Great. Accommodating. C- And this was lone eagle. 3029 unit - checked in with vomit smell on carpet. Bed as hard as a Rock. Ski lockers keys didn’t work. No towels in master bath. Had to replace empty toilet tissue (not end of world but the point). My bet is poor house cleaning stafff too busy trying to clean up vomit from previous guest to get to the rest of the condo. I did mention the smell, right?

Reviewed on Nov 28, 2017

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More About Flying To Castle Rock from Philadelphia

Route Information for Flights from Philadelphia to Castle Rock

Origin Airport IATA Code
ILG
Destination Airport IATA Code
DEN
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

Philadelphia to Castle Rock

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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.