Philadelphia to Denver PHL, TTN → DEN
Philadelphia International Airport (PHL), Trenton-Mercer Airport (TTN) → Denver International Airport (DEN)
The cheapest return found recently is $295 with Frontier Airlines, 21 Nov – 30 Nov, found yesterday.
Return
The cheapest return fare on each of 7 departure dates is usually $311 to $428.
Cheapest return found recently
$295
21 Nov – 30 Nov · Frontier Airlines
Philadelphia International Airport (PHL) → Denver International Airport (DEN)
Leaves 8:38 p.m. · Return leaves 6:58 p.m. · 18 h 11 min of travel, both ways together
out nonstop, back 1 stop
found yesterday
Cheapest nonstop return
$327
6 Feb 2027 – 12 Feb 2027 · American Airlines
Philadelphia International Airport (PHL) → Denver International Airport (DEN)
Leaves 11:25 a.m. · Return leaves 6:15 a.m. · 8 h 1 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$295 21 Nov – 30 Novfound yesterdaySee prices for these dates
$263 9 Jan 2027 – 14 Jan 2027found 6 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $162 to $263.
At $295, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
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 7 departure dates from 8 Nov to 11 Jun 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 21 Nov to compare.
Every date we hold
10 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 8 Nov – 12 Nov | $338 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 2 stops, back 1 stop | found today | See prices for these dates |
| 21 Nov – 30 Nov | $295 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back 1 stop | found yesterday | See prices for these dates |
| 27 Dec – 2 Jan 2027 | $617 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back nonstop | found 5 days ago | See prices for these dates |
| 9 Jan 2027 – 14 Jan 2027 | $263 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 6 Feb 2027 – 12 Feb 2027 | $327 | American Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 1 Apr 2027 – 4 Apr 2027 | $381 | Frontier Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back nonstop | found 5 days ago | See prices for these dates |
| 11 Jun 2027 – 14 Jun 2027 | $475 | American Airlines | Philadelphia International Airport (PHL) → Denver International Airport (DEN) | out nonstop, back 1 stop | found 5 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $263.
Airlines on the cheapest dates: Frontier 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 21 Nov – 30 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Philadelphia to Denver?
Return
Not enough history yet: in 25 days of return prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
New York → Denver
130 km from Philadelphia
$337
$42 more than flying from Philadelphia
6 Feb 2027 – 12 Feb 2027 · EWR → DEN · out 1 stop, back 1 stop
found yesterday
Baltimore → Denver
145 km from Philadelphia
$256
$39 less than flying from Philadelphia
4 Nov – 8 Nov · BWI → DEN · out 1 stop, back 1 stop
found 2 days ago
Philadelphia → Colorado Springs
102 km from Denver
$418
$123 more than flying to Denver
18 Jan 2027 – 23 Jan 2027 · PHL → COS · out 1 stop, 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
Baltimore → Denver
145 km from Philadelphia
$101
15 Dec · BWI → DEN · stops unknown
found yesterday
New York → Denver
130 km from Philadelphia
$145
21 Nov · EWR → DEN · 1 stop
found yesterday
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 21 Nov – 30 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
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