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Cheap flights from Philadelphia to Denver from C$ 128

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
20 Apr — 27 Apr1
1 adult

Cheap flight deals from Philadelphia to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Denver (DEN). 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 15 April 2025.

Round-trip from

C$ 285

One-way from

C$ 128

Popular in

December

Cheapest in

September

Average price

C$ 432

Good round-trip deal

C$ 252 or less

Good one-way deal

C$ 207 or less
United Airlines
  • United Airlines
  • 29/7-5/8
  • Nonstop
  • 7h 46m total
  • Philadelphia to Denver
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Southwest
  • Southwest
  • 7/6
  • Nonstop
  • 4h 10m total
  • Philadelphia to Denver
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Highest demand for flights based on searches. 7% potential increase in price (C$ 43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Philadelphia to Denver Intl.
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Price to beat on a one-way flight from Philadelphia to Denver Intl.
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Find flight deals from Philadelphia to Denver

Cheapest flights from Philadelphia to Denver
Explore the most affordable flight options available from Philadelphia to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 April 2025.

Sat 24/58:31 a.m.PHL - DEN
1 stop8h 26mUnited Airlines
Tue 27/511:45 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 15/4C$ 291
Tue 6/56:30 a.m.PHL - DEN
1 stop6h 45mSouthwest
Tue 13/55:30 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 14/4C$ 300
Tue 6/56:00 a.m.PHL - DEN
1 stop8h 28mJetBlue
Tue 13/51:23 p.m.DEN - PHL
1 stop6h 58mJetBlue
Deal found 15/4C$ 318
Tue 6/57:00 a.m.PHL - DEN
1 stop6h 09mDelta
Tue 13/53:00 p.m.DEN - PHL
1 stop6h 05mDelta
Deal found 15/4C$ 357

Cheapflights Fare Finder

Customize your flight search to find flights from Philadelphia to Denver 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 629,999 searches. Data last updated 15 April 2025.
Use the filters below to find and compare flights from Philadelphia to Denver that are best for you.

Fly from

Philadelphia

Fly to

Denver

Route

Depart

Return

Price

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 24/5

8:31 a.m.-2:57 p.m.

1 stop8h 26m

Denver Intl

Tue 27/5

11:45 p.m.-5:22 a.m.

Nonstop3h 37m

C$ 291

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 6/5

6:30 a.m.-11:15 a.m.

1 stop6h 45m

Denver Intl

Tue 13/5

5:30 p.m.-11:05 p.m.

Nonstop3h 35m

C$ 300

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 6/5

6:00 a.m.-12:28 p.m.

1 stop8h 28m

Denver Intl

Tue 13/5

1:23 p.m.-10:21 p.m.

1 stop6h 58m

C$ 318

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 6/5

7:00 a.m.-11:09 a.m.

1 stop6h 09m

Denver Intl

Tue 13/5

3:00 p.m.-11:05 p.m.

1 stop6h 05m

C$ 357

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 7/6

6:25 p.m.-8:35 p.m.

Nonstop4h 10m

C$ 128

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 4/6

10:10 a.m.-12:17 p.m.

Nonstop4h 07m

C$ 159

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 10/5

6:00 a.m.-12:23 p.m.

1 stop8h 23m

C$ 174

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 24/6

6:00 a.m.-9:44 a.m.

1 stop5h 44m

C$ 179

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 12/10

9:17 a.m.-5:28 p.m.

1 stop10h 11m

C$ 220

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Mon 22/9

6:58 p.m.-10:40 a.m.

2 stops17h 42m

C$ 382

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/4

Best time to book a flight from Philadelphia to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Philadelphia with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Denver

How far ahead should I book a flight from Philadelphia to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Denver. Price data was last updated on 11 April 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to Denver, you should look to book at least 56 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Philadelphia to Denver?

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 320). Flying from Philadelphia to Denver in December is currently the most expensive (average of C$ 484). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to DEN?

Find hourly flight availability from Philadelphia to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 April 2025.

When flying from Philadelphia to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 77% versus a flight in the morning.

Weekly flight availability from Philadelphia to Denver

Explore weekly flight availability from Philadelphia to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 April 2025.

The most flights from PHL to DEN are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 mm per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated 15 April 2025.
To help decide which airline to fly from Philadelphia to Denver, see what other customers have to say about Alaska Airlines, Southwest and Delta. 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.
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
JetBlue
7.3
Good
2,926 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Philadelphia to Denver flight route?

    This flight path from Philadelphia to Denver Intl was viewed by 15 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Philadelphia to Denver round-trip?

    According to our current data, United Airlines (C$ 285), Southwest (C$ 286), and JetBlue (C$ 318) offers the cheapest pricing from Philadelphia to Denver. United Airlines is currently priced 31% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Philadelphia to Denver one-way?

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as C$ 128. Users have also found prices from C$ 159 and C$ 174 on United Airlines and JetBlue, respectively.

  • What are the most reliable airlines from Philadelphia to Denver?

    No one likes to see their flight delayed. When booking a flight from Philadelphia to Denver consider choosing Air Canada (90%), United Airlines (89%) or Frontier (87%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Philadelphia to Denver?

    While on average a flight from Philadelphia to Denver is generally C$ 360, our data shows the cheapest flight currently is C$ 136. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 359 for that flight.

  • Can I find deals for flights from Philadelphia to Denver that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Denver.

  • Can I find deals for business class flights from Philadelphia to Denver?

    Yes. Cheapflights offers flight deals from Philadelphia to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Denver?

    Currently, August is the cheapest month in which you can book a flight from Philadelphia to Denver (average of C$ 320). Flying from Philadelphia to Denver in December is currently the most expensive (average of C$ 484). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Golden
Westminster
Thornton

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Alternative routes for Philadelphia to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Reagan-National to Denver flights

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Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Denver?

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Can Cheapflights find flights from Philadelphia to Denver with no change fees?

Yes! Cheapflights helps users easily find flights from Philadelphia to Denver with no change fees.

Can Cheapflights notify me if prices for flights from Philadelphia to Denver become cheaper?

Yes! Start tracking prices for Philadelphia to Denver flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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