Cheap flights from Philadelphia to Denver from $288 PHL, TTN → DEN
Philadelphia International Airport (PHL), Trenton-Mercer Airport (TTN) → Denver International Airport (DEN)
The cheapest return found recently is $288 with Frontier Airlines, 8 Jan 2027 – 17 Jan 2027, found yesterday.
- Cheapest return found recently
- $288, 8 Jan 2027 to 17 Jan 2027
- Usual return price
- $289 to $304
- Cheapest month to fly
- January 2027, return fares from $218 found in the last 7 days
- Airlines with nonstop flights
- Southwest Airlines, American Airlines, United Airlines
Return
The cheapest return fare on each of 10 departure dates is usually $289 to $304.
Cheapest return found recently
$288
8 Jan 2027 – 17 Jan 2027 · Frontier Airlines
Philadelphia International Airport (PHL) → Denver International Airport (DEN)
Leaves 6:40 p.m. · Return leaves 7:03 a.m. · 53 h 55 min of travel, both ways together
out 1 stop, back 2 stops
found yesterday
Cheapest nonstop return
$304
27 Feb 2027 – 4 Mar 2027 · American Airlines
Philadelphia International Airport (PHL) → Denver International Airport (DEN)
Leaves 7:10 p.m. · Return leaves 6:00 a.m. · 8 h 5 min of travel, both ways together
out nonstop, back nonstop
found 3 days ago
Found recently, and the cheapest we hold
$288 8 Jan 2027 – 17 Jan 2027found yesterdaySee prices for these dates
$218 7 Jan 2027 – 12 Jan 2027found 4 days agoSee prices for these dates
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $138 to $263.
At $288, the cheapest return found recently is above that range.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 10 departure dates from 6 Jan 2027 to 28 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 9-night return fares leaving within 3 days of 8 Jan 2027 to compare.
Every date we hold
67 fares on 10 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 6 Jan 2027 – 13 Jan 2027 | $225 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 7 Jan 2027 – 12 Jan 2027 | $218 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
| 8 Jan 2027 – 17 Jan 2027 | $288 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 2 stops | found yesterday | See prices for these dates |
| 9 Jan 2027 – 17 Jan 2027 | $300 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 15 Jan 2027 – 24 Jan 2027 | $309 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 16 Jan 2027 – 24 Jan 2027 | $292 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 17 Jan 2027 – 24 Jan 2027 | $295 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 2 stops, back 2 stops | found yesterday | See prices for these dates |
| 12 Feb 2027 – 17 Feb 2027 | $303 | Southwest Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back nonstop | found 4 days ago | See prices for these dates |
| 27 Feb 2027 – 4 Mar 2027 | $304 | American Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 28 Feb 2027 – 4 Mar 2027 | $361 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 2 stops, back 2 stops | found 3 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $218.
Airlines on the cheapest dates: Frontier Airlines, Southwest Airlines, American Airlines.
Premium cabin fares from Philadelphia to Denver
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 8 Jan 2027 – 17 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Philadelphia to Denver?
Return
Fares 60 to 89 days before departure were typically 39% lower than 7 to 13 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 7–13 days | $301 | $301 | +63% | 10 |
| 14–29 days | $338 | $295 | +83% | 13 |
| 30–59 days | $295 | $218 | +60% | 19 |
| 60–89 days | $185 | $138 | Cheapest seen | 36 |
| 90–179 days | $234 | $162 | +27% | 36 |
| 180+ days | $475 | $475 | +157% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Baltimore → Denver
145 km from Philadelphia
$368
$80 more than flying from Philadelphia
23 Nov – 30 Nov · BWI → DEN · out 1 stop, back 1 stop
found 2 days ago
New York → Denver
130 km from Philadelphia
$404
$116 more than flying from Philadelphia
25 Nov – 27 Nov · LGA → DEN · out nonstop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
New York → Denver
130 km from Philadelphia
$134
12 Jan 2027 · JFK → DEN · 1 stop
found 2 days ago
Baltimore → Denver
145 km from Philadelphia
$190
30 Nov · BWI → DEN · 1 stop
found 6 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 8 Jan 2027 – 17 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Philadelphia to Denver?
The cheapest return found recently is $288 with Frontier Airlines, 8 Jan 2027 to 17 Jan 2027, found yesterday. The cheapest return we hold, of any age, is $218 with Frontier Airlines, 7 Jan 2027 to 12 Jan 2027, found 4 days ago. The cheapest return fare on each of 10 departure dates is usually $289 to $304.
What is the cheapest month to fly from Philadelphia to Denver?
January 2027 is the cheapest month for a return, from $218, 7 Jan 2027 to 12 Jan 2027, found 4 days ago.
How far ahead should I book a flight from Philadelphia to Denver?
In 49 days of prices between 24 Sept and 11 Nov, return fares 60 to 89 days before departure were typically 39% lower than 7 to 13 days before departure.
Is there a direct flight from Philadelphia to Denver?
Yes, the cheapest nonstop return found recently is $304 with American Airlines, 27 Feb 2027 to 4 Mar 2027, found 3 days ago.
Which airlines have the cheapest flights from Philadelphia to Denver?
Between 6 Jan 2027 and 28 Feb 2027, Frontier Airlines has the cheapest return on 8 of the 10 departure dates we hold, Southwest Airlines on 1 and American Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work