$99 Cheap United flights Philadelphia (PHL) to Denver (DEN)

View $99 flight on Wed, Aug 20, 2025Opens in a new window

$99 Cheap United flights Philadelphia (PHL) to Denver (DEN)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Aug 24 - Wed, Sep 3
PHL
Philadelphia
DEN
Denver
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Sun, Aug 24 from Philadelphia to Denver, returning Wed, Sep 3, priced at $197 found 1 hour ago
United
Wed, Sep 17 - Sat, Sep 27
PHL
Philadelphia
DEN
Denver
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Sep 17 from Philadelphia to Denver, returning Sat, Sep 27, priced at $197 found 1 hour ago
Flights from Philadelphia (PHL) to Denver (DEN)
Origin airport
Philadelphia Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
Frontier Airlines
Distance
1553 mi
Average flight time
2 hours 8 mins

Frequently asked questions

How much is a United Airlines flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
Set the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines round-trip flights from $197 from PHL to DEN. Affordable one-way tickets from $99 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from PHL to DEN with United Airlines?
Browse for one-way or return flights to Denver in January or November. You could find a cheap fare with United Airlines during these quieter months.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) with United Airlines?
Begin your search one to three months ahead of your travel date to find cheap fares on United Airlines flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
Hop on one of United Airlines's 14 weekly direct flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). To see your options, enter your origin, destination and dates and hit search. Then use the "Nonstop" and "Airline" filters.
How long does it take to fly from PHL to DEN with United Airlines?
It takes around 4h 22m to travel nonstop from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) with United Airlines.
Which day of the week has the most United Airlines flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
United Airlines has the most flights from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN) on Thursday. With up to 2 daily departures, you'll get the most flexibility and choice on this day.
What is the earliest United Airlines flight from PHL to DEN?
Leaving PHL at 8:10AM UTC-5, the earliest United Airlines flight to DEN lands at 10:32AM UTC-7. Traveling early means you're less likely to encounter cancellations or delays.* Not a morning person? The last United Airlines flight from PHL to DEN departs at 3:40PM UTC-5 and touches down at 6:02PM UTC-7.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Denver?
United Airlines flights from Philadelphia Intl. Airport (PHL) to Denver arrive at Denver Intl. Airport (DEN). This is the main gateway to this destination.
Why fly with United Airlines from PHL to DEN?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to jet off from PHL to DEN with United Airlines. Plus, when you join our One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
You'll likely be seated on a Boeing 737-900 or a Boeing 737-800 when flying United Airlines from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN). However, keep in mind that a different plane may be used due to operational requirements.
Can I change or cancel my United Airlines flight from Philadelphia Intl. Airport (PHL) to Denver Intl. Airport (DEN)?
It's usually possible to modify or cancel your flight, although there may be additional fees if you booked more than 24 hours ago. Prefer to keep your options open? Use our "Changes included" and "No cancel fee" filters to find flights that won't penalize you if you need to adjust your plans. To make changes, go to "Trips," select your flight and click on "Manage Booking" for more information.

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