PHL to DEN Flights: Explore the Mile High City from Philadelphia
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Last updated Feb 16, 2026
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Tracking the May 7, 2026 departure — the cheapest date we found.
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Philadelphia (PHL)
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Denver (DEN)
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Search FlightsTraveling from the historic streets of Philadelphia (PHL) to the breathtaking Rocky Mountain backdrop of Denver (DEN) offers a perfect blend of East Coast tradition and Western adventure. This approximately four-hour flight connects you from the cradle of American liberty to a bustling urban hub known for its outdoor lifestyle, world-class craft breweries, and a vibrant arts scene. Whether you are heading west for a world-class skiing excursion in the Rockies or traveling for business in Colorado's booming tech corridor, understanding the nuances of this popular domestic route ensures a seamless transition across two time zones and distinct cultural landscapes.
Travel Tips
To make the most of your trip, try to book your flight at least three weeks in advance to secure the most competitive fares offered by major carriers like American or United. Since Denver sits at an elevation of 5,280 feet, it is essential to start hydrating during your flight from Philadelphia to mitigate potential altitude sickness upon arrival. If you are traveling with winter sports equipment, check the specific baggage policies for your airline, as many offer seasonal waivers or specific oversized item fees for skis and snowboards. Finally, consider using the A-Line commuter rail at DEN for a budget-friendly and efficient $10.50 ride directly into the heart of Union Station, bypassing heavy I-70 traffic.
Airport Information
Philadelphia (PHL)
Philadelphia International Airport (PHL) serves as a primary gateway for the Delaware Valley and is a major hub for American Airlines. Located just seven miles from downtown Philadelphia, the airport features seven terminals and a wide array of local dining options, including iconic Philly cheesesteak spots. Travelers can easily reach the airport via the SEPTA Regional Rail, making it highly accessible for those avoiding expensive parking fees or heavy traffic on I-95.
Denver (DEN)
Denver International Airport (DEN) is world-famous for its iconic tent-like roof structure, designed to mimic the snow-capped peaks of the nearby Rocky Mountains. As one of the largest airports in the world by land area, it serves as a massive hub for United, Frontier, and Southwest Airlines. Located about 25 miles from downtown, the airport provides a vast selection of amenities, including an outdoor plaza, unique art installations, and a diverse range of Colorado-inspired dining experiences.
Seasonal Pricing Patterns
Pricing for the PHL to DEN route typically fluctuates based on Colorado's dual-peak tourism seasons. The most expensive times to fly are usually during the mid-winter ski season, specifically December through February, and the height of summer in July and August when mountain hiking is at its peak. For the best deals, look for flights in the shoulder seasons of late April to May or September through early November. During these windows, you can often find significantly lower fares while still enjoying mild weather in both cities.
Frequently Asked Questions
How long is the average flight from PHL to DEN?
Direct flights typically take between 3 hours and 50 minutes to 4 hours and 15 minutes, depending on wind patterns and weather conditions.
Which airlines offer nonstop service on this route?
American Airlines, United Airlines, Southwest, and Frontier Airlines frequently offer direct nonstop flights between Philadelphia and Denver.
What is the time difference between Philadelphia and Denver?
Denver is in the Mountain Time Zone, which is two hours behind Philadelphia's Eastern Time Zone.
Is it cheaper to fly into Denver on a weekday?
Generally, flying on Tuesdays or Wednesdays is more affordable than weekend travel, as there is less demand from leisure travelers and skiers.
How do I get from Denver International Airport to downtown?
The most efficient way is the RTD A-Line commuter train, which runs every 15 minutes during peak hours and takes about 37 minutes to reach Union Station.