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Cheap flights from Philadelphia to Denver from C$ 145

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
30 Mar — 6 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 25 March 2025.

Round-trip from

C$ 278

One-way from

C$ 145

Popular in

December

Cheapest in

September

Average price

C$ 481

Good one-way deal

C$ 276 or less
United Airlines
  • United Airlines
  • 7/6-14/6
  • Nonstop
  • 7h 55m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 25/4
  • Nonstop
  • 4h 17m total
  • Philadelphia to Denver
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Highest demand for flights based on searches. 8% potential increase in price (C$ 54 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 25 March 2025.

Sat 7/63:45 p.m.PHL - DEN
Nonstop4h 18mUnited Airlines
Sat 14/611:45 p.m.DEN - PHL
Nonstop3h 37mUnited Airlines
Deal found 24/3C$ 278
Thu 1/56:55 p.m.PHL - DEN
1 stop6h 10mSouthwest
Wed 7/55:30 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 24/3C$ 281
Sat 3/56:00 a.m.PHL - DEN
1 stop9h 06mJetBlue
Sun 4/510:39 p.m.DEN - PHL
1 stop9h 01mJetBlue
Deal found 24/3C$ 299
Fri 2/55:20 a.m.PHL - DEN
1 stop6h 05mDelta
Tue 6/512:55 a.m.DEN - PHL
1 stop6h 36mDelta
Deal found 24/3C$ 368
Sun 17/812:05 p.m.PHL - DEN
1 stop23h 14mSun Country Air
Sat 23/810:20 a.m.DEN - PHL
1 stop22h 55mSun Country Air
Deal found 24/3C$ 473

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 25 March 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 7/6

3:45 p.m.-6:03 p.m.

Nonstop4h 18m

Denver Intl

Sat 14/6

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

Nonstop3h 37m

C$ 278

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Thu 1/5

6:55 p.m.-11:05 p.m.

1 stop6h 10m

Denver Intl

Wed 7/5

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

Nonstop3h 35m

C$ 281

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 3/5

6:00 a.m.-1:06 p.m.

1 stop9h 06m

Denver Intl

Sun 4/5

10:39 p.m.-9:40 a.m.

1 stop9h 01m

C$ 299

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 2/5

5:20 a.m.-9:25 a.m.

1 stop6h 05m

Denver Intl

Tue 6/5

12:55 a.m.-9:31 a.m.

1 stop6h 36m

C$ 368

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 17/8

12:05 p.m.-9:19 a.m.

1 stop23h 14m

Denver Intl

Sat 23/8

10:20 a.m.-11:15 a.m.

1 stop22h 55m

C$ 473

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 25/4

8:00 a.m.-10:17 a.m.

Nonstop4h 17m

C$ 145

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 10/5

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

1 stop8h 23m

C$ 165

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 26/4

2:15 p.m.-7:45 p.m.

1 stop7h 30m

C$ 181

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 24/6

7:05 a.m.-2:50 p.m.

1 stop9h 45m

C$ 185

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sat 26/4

7:04 a.m.-9:15 p.m.

2 stops16h 11m

C$ 380

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

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 21 March 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 25 March 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 25 March 2025.

The most flights from PHL to DEN are scheduled on a Monday (17 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 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 25 March 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
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,785 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 16 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$ 278), Southwest (C$ 281), and JetBlue (C$ 299) offers the cheapest pricing from Philadelphia to Denver. United Airlines is currently priced 34% 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 United Airlines. According to our data, you can fly for as low as C$ 145. Users have also found prices from C$ 165 and C$ 181 on JetBlue and Southwest, 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 (88%), United Airlines (88%) or Qatar Airways (85%) 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$ 276, our data shows the cheapest flight currently is C$ 226. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 468 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

Fly with Cheapflights

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How does Cheapflights help users find flights from Philadelphia to Denver?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Philadelphia to Denver. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Denver for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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