Economy Bundle includes a carry-on bag and seat choice, ideal for budget travelers.
Premium Bundle offers priority boarding and extra legroom for a small additional cost.
Planning a trip from Philadelphia to Denver? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
When planning a flight from Philadelphia to Denver, there are several strategies to consider for saving money. Generally, Tuesday is the cheapest day of the week to fly, while April and May are the most affordable months.
Book Early: The best prices are typically found when booking more than three weeks in advance.
Choose Frontier: Frontier Airlines generally offers the cheapest flights for this route.
Consider Layovers: Flights with one stop are usually cheaper than direct flights.
Fly Tuesday: Opt for a Tuesday departure to potentially save on ticket costs.
Travel in Spring: April and May are typically the most affordable months to fly this route.
This feature is powered by ChatGPT: an OpenAI-developed artificial intelligence model trained with KAYAK proprietary data and third-party data not verified by KAYAK.
Low season | January |
---|---|
High season | August |
Cheapest flight | $71 |
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
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Tuesday
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Wednesday
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Thursday
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Friday
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Saturday
Aer Lingus, Air Canada, American Airlines, +5 more
Aer Lingus, Air Canada, +6 more
4
5
Sunday
Air Canada, American Airlines, British Airways, +4 more
Air Canada, American Airlines, +5 more
3
4
Direct returns
Denver Intl to Philadelphia
Monday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Tuesday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Wednesday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Thursday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Friday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Saturday
Aer Lingus, Air Canada, American Airlines, +5 more
Aer Lingus, Air Canada, +6 more
4
5
Sunday
Aer Lingus, Air Canada, American Airlines, +4 more
Aer Lingus, Air Canada, +5 more
3
4
Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.
Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.
Very good. Sad to learn Southwest is going start to charge for bags
Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!
My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.
WiFi on the flight was not working. Thus, entertainment options were limited.
Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.
Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.
Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.
I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.
For the first time in a long time we had a flawless experience with Southwest. Both flights were early and no mechanical errors at all. We were shocked and pleasantly surprised 😮.
Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.
Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.
The WiFi didn't seem as fast as it normally is
Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!
The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please
Delta is a premier airline so my expectations are most always met.
Seats are much much more comfortable than United, which is what I usually fly
Zero updates from the pilots for 30 minutes in the tarmac
Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons
I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️
Food choices were very limited. Taste of the dishes was average.
I liked all the informational texts. I always knew where to go and when .
Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.
The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.
It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.
The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.
The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.
Flight was 3 1/2 hour delayed with no credit or meal vouchers
late departure due to some unspecified issue with ventilating the cabin. They got it running but it was FREEZING for the whole flight. I asked for a blanket but they didn't provide one. They could not turn up the heat. it was quite miserable.
Liked that we left on time for each flight. Snacks not the best, but we're okay.
One of the best flights I’ve had. So smooth.
late again! but its my only option to not take 9 hours to get to Memphis
Almost everything was outstanding. First, we boarded on time and the flight crew did a great job getting everyone seated. Then the pilots took their time and care to make sure the plane was full de-iced three times as there was a bad ice storm a few hours earlier. The plane ride was smooth and comfortable and even the economy seats had decent room and comfort. Flight Attendant Lisa went above and beyond to make sure I was comfortable - she is outstanding. The only thing wrong with the flight, and it is something which needs to be addressed, is that the gate to gate time was over 6.5 hours and not one meal was served. The only thing offered to eat were two small cookies for a transcontinental flight - unacceptable. Charge me more but give me a meal for a long flight. Thankfully Lisa found something for me.
Very poor. Our special services attendant gave us incorrect information. I also was mishandled at landing. There was no wheelchair waiting. I fell deboarding the plane. Appalling!
I had a very unpleasant encounter with one man from customer service: he was extremely rude and miserable. And his condition was reflected on his decision to send me to the worst airport hotel and get an awful flight connection. My hotel shuttle had never arrived and I had to book another hotel. People served by other representatives got a much better treatment and deal.
The flight left a bit late, but arrived close to time expected…With the flight being close to full the crew did well serving drinks to all in a very timely fashion. The flight was a pleasure…
They didn't have any gluten-free snacks, oddly, which I require...or any flavored soda water or decaf tea options, which seems to be standard.
My flight back my reservations were list because they said I didn't pay my pet fee when I had a receipt
For coast to coast travel the A321 and even the NEO, even in first class will never be excellent. That would take a B787 or 777 to accomplish.
The one gate agent was very abrupt and rude. Not a good look for American for the day
The plane failed preflight inspection, so we sat there for 90 mins while they tried to fix it. Ultimately, everything was remedied and we made our connecting flight; instead of a 2 hour layover at the airport, we spent it waiting on the plane.
I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.
The seats were extremely hard and uncomfortable. It was disappointing even for a budget airline.
Delayed each time on a round trip with no significant weather interference. Updates to flight times came after the fact. 30 min behind in boarding and board and phone still show an on time departure. Some mysterious extra 300 miles that came so surprising they had to fuel while we were already on board?
Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.
Allowed me to chose my seat without extra charge (I purchased full-price ticket) and boarding was in group1. Didn't even serve water.
Stuck in Phoenix for two days, not even a hotel voucher offered.
Every day about it was very different all the boarding pass where all wrong l miss flight no refund all crazy
Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...
Both flights were delayed. The sizing of bags is crazy. I know it is advertised as a no frills cheaper option but it does feel like you are being extorted for money the whole way-- $20 dollars to talk to a gate agent? Charging for soda a pretzels? I don't think I will be flying Frontier again if I can help it. That said, all the staff were wonderful.
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