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Cheap flights from Philadelphia to Denver from C$ 135

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — DEN
8 Jul — 15 Jul1
1 adult

Cheapflights Tip: The best prices from Philadelphia to Denver Intl are usually found in September or October, booked 55 days in advance, depart on a Wednesday or Thursday and return on a Monday

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 3 July 2025.

Round-trip from

C$ 268

One-way from

C$ 135

Popular in

December

Cheapest in

September

Average price

C$ 388

Good one-way deal

C$ 562 or less
Southwest
  • Southwest
  • 27/8-30/8
  • Nonstop
  • 7h 35m total
  • Philadelphia to Denver
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United Airlines
  • United Airlines
  • 15/10
  • Nonstop
  • 4h 06m total
  • Philadelphia to Denver
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Highest demand for flights based on searches. 5% potential increase in price (C$ 30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 3 July 2025.

Wed 27/84:45 p.m.PHL - DEN
Nonstop4h 00mSouthwest
Sat 30/85:25 p.m.DEN - PHL
Nonstop3h 35mSouthwest
Deal found 1/7C$ 268
Fri 5/126:00 a.m.PHL - DEN
1 stop8h 32mJetBlue
Sun 7/1211:59 p.m.DEN - PHL
1 stop6h 37mJetBlue
Deal found 1/7C$ 312
Tue 5/86:00 a.m.PHL - DEN
1 stop8h 47mDelta
Wed 13/84:00 p.m.DEN - PHL
1 stop5h 50mDelta
Deal found 2/7C$ 350
Tue 2/99:55 a.m.PHL - DEN
Nonstop4h 05mUnited Airlines
Sat 6/91:45 p.m.DEN - PHL
Nonstop3h 35mUnited Airlines
Deal found 3/7C$ 399

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 3 July 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

Wed 27/8

4:45 p.m.-6:45 p.m.

Nonstop4h 00m

Denver Intl

Sat 30/8

5:25 p.m.-11:00 p.m.

Nonstop3h 35m

C$ 268

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 5/12

6:00 a.m.-12:32 p.m.

1 stop8h 32m

Denver Intl

Sun 7/12

11:59 p.m.-8:36 a.m.

1 stop6h 37m

C$ 312

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 5/8

6:00 a.m.-12:47 p.m.

1 stop8h 47m

Denver Intl

Wed 13/8

4:00 p.m.-11:50 p.m.

1 stop5h 50m

C$ 350

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 2/9

3:40 p.m.-5:53 p.m.

Nonstop4h 13m

Denver Intl

Wed 10/9

1:45 p.m.-7:20 p.m.

Nonstop3h 35m

C$ 399

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 15/10

8:00 a.m.-10:06 a.m.

Nonstop4h 06m

C$ 135

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 26/10

6:50 a.m.-9:00 a.m.

Nonstop4h 10m

C$ 162

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Tue 18/11

6:00 a.m.-12:32 p.m.

1 stop8h 32m

C$ 170

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Wed 23/7

5:21 p.m.-10:29 p.m.

1 stop7h 08m

C$ 176

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Fri 3/10

6:57 p.m.-6:02 p.m.

2 stops25h 05m

C$ 244

PhiladelphiaDenver

PHL - DEN

PHLDEN

Philadelphia

Sun 30/11

7:06 a.m.-9:30 a.m.

1 stop28h 24m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

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 27 June 2025.

To ensure you get the cheapest price possible for a flight from Philadelphia to Denver, you should look to book at least 55 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 3 July 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 66% 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 3 July 2025.

The most flights from PHL to DEN are scheduled on a Thursday (17 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 on average).

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 3 July 2025.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, andDelta from Philadelphia to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Overall

8.0

Crew

8.5

Entertainment

7.1

Boarding

8.1

Food

7.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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, Southwest (C$ 268), JetBlue (C$ 312), and Delta (C$ 350) offers the cheapest pricing from Philadelphia to Denver. Southwest is currently priced 35% 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$ 135. Users have also found prices from C$ 162 and C$ 170 on Southwest 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 (78%), United Airlines (76%) or American Airlines (68%) 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$ 660, our data shows the cheapest flight currently is C$ 495. When looking at the most popular route, (Philadelphia - Denver Intl), you can expect to pay C$ 360 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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How does Cheapflights help users find flights from Philadelphia to Denver?

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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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