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Cheap Flights from Allentown to Colorado

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Denver
6h 11m2 stops
from $240per person
Colorado Springs
6h 21m2 stops
from $400per person
Hayden
Hayden
7h 30m2 stops
from $409per person
Montrose
Montrose
7h 43m2 stops
from $509per person
Grand Junction
10h 40m4 stops
from $549per person
Aspen
7h 36m2 stops
from $569per person
Explore the map
Booking Insights

Price, demand and travel trends for Allentown to Colorado flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Allentown to Colorado recently?

The cheapest fares from Allentown to Colorado on KAYAK in the last week were to Denver Intl (DEN) from $240 round-trip and to Hayden Yampa Valley (HDN) from $409 round-trip.

How do fares into airports in Colorado compare?

According to KAYAK data from the last 12 months, the cheapest airports to fly into Colorado from Allentown are:

• Denver Intl (DEN) (avg. price $287)
• Grand Junction Regnl (GJT) (avg. price $563)
• Aspen Pitkin County (ASE) (avg. price $572)

Are flights from Allentown to Colorado cheaper or more expensive than last year?

Fares from Allentown to Colorado are about 53% higher than they were in November last year, averaging $518 round-trip.

What's the cheapest month to fly from Allentown to Colorado?

August is typically the cheapest month to fly from Allentown to Colorado, with round-trip fares averaging $227. March and December are usually the most expensive, averaging $724 and $545, respectively.

How do fares from Allentown to Colorado vary by day of the week?

On average, Monday is the cheapest day to fly from Allentown to Colorado and Sunday is the most expensive. Looking at the past 12 months of KAYAK data, it's 105% more expensive to fly on a Sunday compared to Monday.

What's the best time of day to fly from Allentown to Colorado?

It's cheapest to fly to Colorado in the afternoon with average prices of $283. The evening is the most expensive time to fly, with average prices of $488.

What's the best time to book a flight from Allentown to Colorado?

Book your flights 11 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 40% compared to booking at the last minute (within 2 weeks of departure).

Key details for Allentown to Colorado flights

Low season

March

Cheapest flight

$150
Beat the crowds with an average 83% drop in travelers.
The most popular month to fly with an average 127% increase in travelers.
One-way flight from Allentown to Denver

Your Allentown to Colorado flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Allentown to Colorado?

    Fares from Allentown to Colorado are around their usual level right now. A round-trip under $229 is considered a good deal, so it's worth keeping an eye out, or setting a Price Alert to catch fare changes.

  • How much should I budget for a flight from Allentown to Colorado?

    Over the past 12 months, round-trip fares from Allentown to Colorado have typically cost between $229 and $438.

  • What are the main airports serving Colorado?

    Colorado has 16 airports. 85% of KAYAK users choose Denver Intl (DEN) as their arrival airport.

  • Which airlines fly nonstop from Allentown to Colorado?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Allentown to Colorado. However, Delta offers a one-stop option.

  • Which destinations in Colorado can I fly nonstop from Allentown?

    Based on the flight schedule for the next 3 months, there are no nonstop flights from Allentown to Colorado. The most popular destination you can reach with one stop is Denver.

  • Is it cheaper to fly with a layover from Allentown to Colorado?

    No, nonstop flights from Allentown to Colorado are typically the cheaper option, averaging $268 over the past 12 months.

  • Which cabin classes are available from Allentown to Colorado?

    On flights from Allentown to Colorado you can only book Economy Class.

  • What are some popular landmarks around Colorado?

    Colorado is home to many popular sights. KAYAK travelers' favorites include:

    • Colorado Convention Center
    • Coors Field
    • Ball Arena
    • 16th Street Mall

Your guide to booking Allentown to Colorado flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 11 weeks before your trip. KAYAK data shows fares in this window are around 40% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • Flexible with your dates? Fly in August to save some money. It's typically the cheapest month on this route, while flights in March will cost you the most.
  • Fly out on a Monday to get the cheapest fares. Avoid Sunday flights, which are about 105% more expensive.
  • If you're watching your budget, fly into Denver Intl (DEN) which has the lowest average airfare in the region. Just remember to budget for any onward travel by bus, car or domestic flight.
  • Start your trip in Denver, the most popular destination in Colorado. From there, it's easy to continue on to other popular spots such as Colorado Springs, Estes Park and Aspen.

Reviews of the top 4 airlines serving from Allentown to Colorado

 
Need help choosing which airline to fly with from Allentown to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8719 reviews
7.8Entertainment
7.2Food
7.8Comfort
8.1Boarding
8.5Crew
Airline reviews

Aircraft without problems that leave on time, not 2 hours late with last minute gate changes across the terminal

2.0 MediocreGene, Oct 2026
Read more Delta reviews

Aircraft without problems that leave on time, not 2 hours late with last minute gate changes across the terminal

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

Delta flight was on time, seats were comfortable, and crew was nice.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

Airline lost my luggage and set me back a day worth of travel due to having to stay in Denver to wait on my luggage

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

The helpful attitude of the staff, and being a wheelchair passenger everyone was helpful and understanding. The trip was made comfortable by the upgraded seat which was given without my request, that was a great surprise. Thank you Delta.

The flight attendants were friendly and seemed to like their jobs. I am not a high maintenance person, but they seemed to respond to people's needs and requests in a timely fashion with a smile.. I appreciate the benefits of complimentary snacks and beverages, as well as the relatively inexpensive checked baggage fee. (Although I would like it better if it were free! :) ) The only improvement that could be made to make the boarding process more efficient is to board the plane from the back. The alternative would be to board people with only a personal item first. This would reduce the wait time while others are stowing their baggage.

We sat on the tarmac in Denver for over 30 minutes because a plane was in our gate. The pilot kept saying it will just be 5 minutes or less. However, we sat for over 30 minutes. Experiences like this make customers not trust what the pilot is saying.

Service was slow Flight was very loud at back of plane

I need to note that this flight experience was generally fine but the boarding situation was absolutely a mess and there wasn’t any actual priority boarding. I rated the experience poorly because I’m am genuinely so frustrated with the crew on United taking the baggage space in first class. This flight it didn’t happen, but the last few flights (when I ironically don’t get an opportunity to provide feedback) have been spoiled because upon entering the first class cabin as one of the first few seated passengers, the overhead bins are full and ‘crew’’ tags are on the bags of those taking space. I don’t intend to infer some sort of a class or caste system but it’s absolutely ridiculous that the crew takes the overhead storage above and beyond their most loyal and lucrative customers. They should not even have economy space IMO. And I’ve gotten grief when I’ve noted to the crew the ridiculousness of the notion that the crew (who are the last off the plane) should have priority over flyers who pay. I hope you find a way to convey this message to United because it’s happening with increasing frequency and I intend to find a way to expose the specific crew members who are doing this on a flight by flight basis. (And I have a day job)

Seats needs to be wirer and food is very poor

Pretty much the exact same comments for this flight, there was crazy weather!

I have been flying united for a long time but now I’m done

1) United economy seats barely recline. 2) I have yet to get United WiFi to work, after numerous flights.

Flight attendant moved my bag without notifying me and was rude to me when I asked him about it. There was no reason to move it.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

Seats suck. Only one drink service in three hours with the flight attendants being more attendant to their phones than the customer. Painful in the extreme.

Lady behind us talked loud nonstop not your fault but annoying lol

Terrible. We needed to change return flights due to an incoming hurricane. They would not refund our return flight.

The employees at Sioux Falls airport were friendly and helpful. As a veteran/retired military Allegiant allows two checked bags, one carry on bag and a seat on the plane all at no cost. The flight crew and pilots were friendly and very competent.

The check-in and flight crew employees are excellent. The flight was good and the seats were adequate.

The flights to and from Cincinnati were great at being on time for both, departures and arrivals. The planes could use some updating.

It was a dismal experience. The flight was delayed for 4 hours, and we spent hours in the plane, without air, during the summer. We were not provided with water, and the medical assistance was inadequate when it arose.

Check in on the web portal was cumbersome! After several attempts I finally got the boarding pass.

Posted a 20minute delay but didn’t delay at all. Caused boarding issues and confusion. Also, didn’t release baggage. Took over an hour and 20 minutes to get luggage.

My TSA number was missing from my ticket which shouldn’t have happened since it’s in my file. The on board flight attendant who was a male, did not want to help me put my luggage in the overhead bin and made a very rude comment and was very unpleasant. The good… the woman who fixed my ticket with the TSA number was excellent and I had extra legroom which was perfect.

Plane had mechanic problem that was never explained. Had to bring a plane from another airport. Six hour delay. No apology for the delay. Not even an acknowledgment.

Flight was good- arrived early ! But ticketing with Underpricer and Kayak was poor at best- unnessacarily difficult due to how the ticket were issued

My feedback from the trip to Columbia to Chicago was meant for Chicago to Denver.

The boarding and flight announcements need to be honest and accurate. These were not. While flight delays cannot be avoided, please. be honest with the passengers in informing us about the timing of the delays. Deceptive delay times is not good business. Deceptive and/or grossly inaccurate boarding times are not good business either.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

My seat tv didn’t work the whole trip. And the seat space is too small despite being seated at the front.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

The airline schedule services was simply mediocre. The ground crew is fine; they are doing their best. The after-delay services were simply poor, and after-cancelling services were almost non-existence. Receiving refund is one rescuing point, but please keep in mind that, people wants to get home or get to their destinations. Cancelling without aftermath recourse is simply poor services. AA needs to fire the marketing department, and the customer-service related leaders.

More options for your flight from Allentown to Colorado

Complete your trip to Colorado with a hotel stay or car rental