PHL - DEN

$132 Find Cheap Flights from Philadelphia to Denver - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Denver departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$227
Typical prices: $237-$521
United Airlines
Sat 12/12Wed 12/30
PHL - DEN • 1 stop
Cheapest non-stop
$228
Typical prices: $249-$470
Frontier
Wed 10/21Sun 10/25
PHL - DEN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier Economy Bundle adds a carry-on and seat choice; AA Basic Economy cuts perks.
Southwest includes free carry-on; United Economy Plus adds extra legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with American Airlines, Frontier and others. Average duration is 4h 05m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Avoid delays
Most punctual • 88% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 17% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
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Good to know
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Flight Deals

Cheap Flights from Philadelphia to Denver (PHL-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Denver

Sat, Dec 12 - Wed, Dec 30
United Airlines Logo
8:00 pm - 11:55 pmPHL  Philadelphia-DEN Denver Intl
5h 55m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
5:45 pm - 11:21 pmDEN  Denver Intl-PHL Philadelphia
3h 36mnonstop
$227United Airlines
Tue, Sep 29 - Wed, Oct 7
United Airlines Logo
10:05 am - 12:10 pmPHL  Philadelphia-DEN Denver Intl
4h 05mnonstop
United Airlines Logo
11:52 pm - 9:43 amDEN  Denver Intl-PHL Philadelphia
7h 51m1 stop Washington, D.C. Dulles Intl
$227United Airlines
Thu, Oct 8 - Tue, Oct 13
Frontier Logo
12:35 pm - 9:31 pmPHL  Philadelphia-DEN Denver Intl
10h 56m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
8:55 pm - 2:25 pmDEN  Denver Intl-PHL Philadelphia
15h 30m2 stops Chicago O'Hare Intl Dallas/Fort Worth
$227Frontier
Fri, Sep 11 - Fri, Sep 18
Frontier Logo
12:40 pm - 8:04 amPHL  Philadelphia-DEN Denver Intl
21h 24m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
9:19 pm - 7:16 amDEN  Denver Intl-PHL Philadelphia
31h 57m2 stops Dallas/Fort Worth Atlanta Hartsfield-Jackson
$227Frontier
Tue, Sep 15 - Tue, Sep 22
Southwest Logo
5:10 pm - 7:10 pmPHL  Philadelphia-DEN Denver Intl
4h 00mnonstop
Southwest Logo
6:30 am - 2:20 pmDEN  Denver Intl-PHL Philadelphia
5h 50m1 stop Chicago Midway
$227Southwest
Sun, Sep 27 - Thu, Oct 1
Multiple Airlines Logo
6:10 pm - 9:29 pmPHL  Philadelphia-DEN Denver Intl
29h 19m1 stop Des Moines
Multiple Airlines Logo
11:21 am - 11:18 pmDEN  Denver Intl-PHL Philadelphia
9h 57m2 stops Tampa Atlanta Hartsfield-Jackson
$227Multiple Airlines
Sat, Oct 3 - Wed, Oct 7
Southwest Logo
5:25 am - 7:30 amPHL  Philadelphia-DEN Denver Intl
4h 05mnonstop
Southwest Logo
6:35 am - 3:25 pmDEN  Denver Intl-PHL Philadelphia
6h 50m1 stop Lambert-St Louis
$228Southwest
Thu, Sep 10 - Sun, Sep 20
Multiple Airlines Logo
2:49 pm - 9:43 pmPHL  Philadelphia-DEN Denver Intl
8h 54m1 stop Charlotte Douglas
Multiple Airlines Logo
8:00 am - 5:20 pmDEN  Denver Intl-PHL Philadelphia
7h 20m1 stop Des Moines
$229Multiple Airlines
Sat, Dec 12 - Tue, Jan 5
Delta Logo
4:00 pm - 11:24 pmPHL  Philadelphia-DEN Denver Intl
9h 24m1 stop Atlanta Hartsfield-Jackson
Delta Logo
7:05 am - 5:40 pmDEN  Denver Intl-PHL Philadelphia
8h 35m1 stop Salt Lake City
$237Delta
Sat, Oct 17 - Wed, Oct 21
Delta Logo
6:13 pm - 10:32 pmPHL  Philadelphia-DEN Denver Intl
6h 19m1 stop Atlanta Hartsfield-Jackson
Delta Logo
8:00 am - 6:18 pmDEN  Denver Intl-PHL Philadelphia
8h 18m1 stop Atlanta Hartsfield-Jackson
$237Delta
Booking Insights

KAYAK's insights & trends for Philadelphia to Denver flights

Get data-powered insights and trends into flights from Philadelphia to Denver to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Philadelphia to Denver?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Denver departing in September.

Flight prices are below average for this route right now.

Flights to Denver from Philadelphia usually cost between $285 and $474 in September.
The lowest price found in the past 5 days was $227 on United Airlines (Sep 9-Sep 16).

What’s the cheapest day of the week to fly from Philadelphia to Denver?

The average price of all round-trip flights from Philadelphia to Denver clicked on KAYAK for each day over the last 12 months.

When flying from Philadelphia to Denver, you should consider leaving on a Friday and avoid Sundays if you are looking for the best rates. For your return to Philadelphia, you’ll find the best rates on Fridays and the most expensive ones on Mondays.

What is the cheapest month to fly from Philadelphia to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Denver is January, where tickets cost $304 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $471 and $424 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Philadelphia to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Philadelphia to Denver, you should book around 2 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Expert advice

Expert advice for your flight from Philadelphia to Denver

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on American Airlines, PHL and DEN

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low season

January

Cheapest flight

$132
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Philadelphia to Denver

When to book flights from Philadelphia to Denver

Are your dates flexible? Find out the best times to travel from Philadelphia to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Denver

  • Which good hotels are near Denver International Airport?

    The Hampton Inn is a 25-minute drive from the popular Denver Botanical Gardens and a 15-minute drive from Denver International Airport. The Embassy Suites by Hilton is a 20-minute drive from the Museum of Nature and Science and a 12-minute drive from the airport.

  • What dining options are available at Denver International Airport?

    If you would like to grab a bite to eat once your flight has landed at Denver International Airport, there are many options that you can choose from. The Boulder Beer Tap House is an American-style restaurant found in the Jeppesen Terminal, while the Cantina Grill has a Mexican-inspired menu and is located near the B Gates. Caribou Coffee is near the A Gates and is a good choice for anyone interested in grabbing a to-go pastry or sandwich.

  • What shopping options are available at Philadelphia International Airport?

    If you would like to purchase a gift for yourself or a loved one, consider going to one of the several shops in Philadelphia International Airport. B-Iconic is located in Terminals D and E and offers a variety of women’s clothing and accessories, while Pennsylvania Market sells souvenirs from the local region.

  • Does Philadelphia International Airport have any amenities for children?

    In addition to several Nursing Mother’s Stations that can be used for increments of 30 minutes, Philadelphia International Airport provides travelers with access to the “Ready For Take-Off” aviation-themed play area. It contains a variety of climbing equipment and toys, making it a popular place for kids to pass the time before boarding their flight.

  • What are the public transportation options to Philadelphia International Airport?

    If you want to travel to PHL using public transport, you can board a Southeastern Pennsylvania Transportation (SEPTA) train, SEPTA bus, or a taxi. Airport Regional Line trains and buses are recommended for budget travelers. Between the two, trains are better since they’re just as cheap but quicker. Taxis are recommended for travelers not near the train/bus boarding stations, those with lots of luggage, and those in a rush.

  • Can I leave my car at Philadelphia International Airport for the duration of my trip?

    If you arrive at PHL with your car, you can leave it in the Economy Parking Lot till you return. This lot, connected to the terminal via shuttle buses that operate 24 hours every day, has limited availability. Hence, pre-booking your slot is advised.

  • Does Denver International Airport have nursing rooms?

    DEN has several comfortable, private spaces for traveling mothers to nurse their children. There are three nursing rooms situated post-security at the center of all of the airport’s concourses, one in the center of Jeppesen Terminal on Level 5 near Arrivals, and one on the east side of Concourse B.

  • Can I rent a car at Denver International Airport?

    You can rent a car at DEN since the airport has on-site locations for more than 10 car rental companies, including Avis, Budget, Enterprise, Payless, Sixt, National, and Hertz. Each agency provides a shuttle to its location from Jeppesen Terminal. The shuttles pick up and drop off clients on Level 5, Island 4.

  • How can I travel sustainably from Philadelphia to Denver?

    To travel from PHL to DEN sustainably, travel with JetBlue or United Airlines. These airlines have better fuel conservation practices, carbon offset and recycling programs, and green building designs than the other airlines serving this route.

  • Where can I pray at Denver International Airport?

    At DEN, you can pray privately and in a quiet environment. This is because the airport has an Interfaith Chapel as well as an Islamic Prayer Room on the East Side of the Jeppesen Terminal. They're open around the clock.

  • What is the cheapest flight from Philadelphia to Denver?

    In the last 5 days, the lowest price for a flight from Philadelphia to Denver was $133 for a one-way ticket and $227 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Denver?

    No

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to Denver?

    American Airlines, Delta, and JetBlue offer inflight Wi-Fi service on the Philadelphia to Denver flight route.

  • Which aircraft models fly most regularly from Philadelphia to Denver?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Philadelphia to Denver flight route.

  • Which airline alliances offer flights from Philadelphia to Denver?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Philadelphia and Denver, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Philadelphia to Denver?

    There are nonstop flights from Philadelphia to Denver on a daily basis.

  • Which is the best airline for flights from Philadelphia to Denver, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Denver are Southwest and Delta. With an average price for the route of $426 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $416 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Philadelphia to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and DEN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Philadelphia to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $188 or less one-way and $324 or less round-trip.
  • Hoping to make your travel experience as quick and easy as possible? If so, make sure to look for direct flights from Philadelphia to Denver. Frontier and American Airlines are good companies for those traveling on a budget, while United and Southwest provide free snacks and drinks.
  • To receive some pampering before your flight from Philadelphia to Denver takes off, head to one of the XpresSpa locations in Terminals C, D, and F of Philadelphia International Airport. Offering services such as manicures, pedicures, massages, facials, and waxing, these beauty salons are the ideal place to unwind before beginning your travels.
  • For those traveling with a furry friend or service animal, don’t forget to bring them to a pet relief area once you have landed at Denver International Airport. There are several relief zones located in Terminals A, B, and C, as well as a large fenced-in area near Jeppesen Terminal.
  • If you have some time to pass before your flight begins boarding, access Philadelphia International Airport’s free digital library via their WiFi connection. This library allows travelers to download a variety of digital content at no charge, including books, magazines, and even podcasts.
  • It is important to keep in mind that smoking is not currently allowed anywhere inside the buildings of Denver International Airport. If you need a cigarette, you will instead have to wait until you have left security, and find a designated smoking area located outside of the primary Arrivals terminal.
  • Philadelphia International Airport (PHL) is the primary airport serving the Delaware Valley. It is a hub for American Airlines and a focus city for Frontier Airlines. Denver International Airport (DEN) is the primary airport for the Denver metropolitan area and Front Range Urban Corridor. This airport is a hub for Frontier, United, and Southern Airways Express, and a focus city for Southwest.
  • While waiting for your flight to DEN, you can relax at PHL’s United Club between Concourse C and D; Delta Sky Club near the Terminal D/E Connector; or American Airlines Admirals Club below Gate A6 in Concourse A East, between Gates A15 and A16 in Concourse A West, between Concourses B and C, and above the food court in Concourse F. These lounges often accept travelers journeying with their affiliate airlines only. However, when space is available, they accept paid-entry guests as well.
  • Suppose you need some assistance at PHL. In that case, look for an information desk on the Airside, Landside, and in the East wing of Terminal A, Airside of Terminal B, or Landside of Terminal E. Information desks at this airport are operational round-the-clock. They’re manned by easy-going, knowledgeable airport staff who are always ready to help.

Prefer to fly direct from Philadelphia to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Philadelphia to Denver Intl.
Find which airlines fly direct from Philadelphia Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Philadelphia to Denver Intl

Monday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Tuesday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Wednesday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Thursday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Friday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Saturday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Sunday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

See more direct flights

Direct returns

Denver Intl to Philadelphia

Monday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Tuesday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Wednesday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Thursday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Friday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Saturday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

Sunday

American Airlines,Frontier,Southwest, +1 more

American Airlines,Frontier, +2 more

See more direct flights

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

Other airlines flying from Philadelphia to Denver

Flights from the other most popular airlines that fly from Philadelphia to Denver according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.