ABE - DEN

$64 Find Cheap Flights from Allentown to Denver - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Allentown to Denver departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Everything you should know

Cheapest round-trip
$129
Typical prices: $166-$284
Allegiant Air
Mon 9/28Fri 10/2
ABE - DEN • Non-stop
Cheapest one-way
$64
Typical prices: $83-$132
Allegiant Air
Mon 9/28
ABE - DEN • Non-stop
Nonstop flights
Mon, Fri
You can fly direct with Allegiant Air. Average duration is 3h 57m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $380 (round-trip)
Shortest trip • 7h 19m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 37% price drop
Most popular
Good to know
Good to know
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Good to know
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Allentown to Denver (ABE-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Allentown to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Allentown to Denver

Mon, Sep 28 - Fri, Oct 2
Allegiant Air Logo
7:30 am - 9:16 am
ABE
-
DEN
3h 46mnonstop
Allegiant Air Logo
10:14 am - 3:42 pm
DEN
-
ABE
3h 28mnonstop
$129Allegiant Air
Fri, Aug 28 - Mon, Aug 31
Allegiant Air Logo
7:00 am - 8:52 am
ABE
-
DEN
3h 52mnonstop
Allegiant Air Logo
10:12 am - 3:41 pm
DEN
-
ABE
3h 29mnonstop
$143Allegiant Air
Mon, Sep 14 - Thu, Sep 24
Multiple Airlines Logo
7:30 am - 9:16 am
ABE
-
DEN
3h 46mnonstop
Multiple Airlines Logo
10:38 am - 9:05 pm
DEN
-
ABE
8h 27m
1 stop
$173Multiple Airlines
Mon, Aug 24 - Thu, Aug 27
Multiple Airlines Logo
7:00 am - 8:52 am
ABE
-
DEN
3h 52mnonstop
Multiple Airlines Logo
8:31 am - 9:07 pm
DEN
-
ABE
10h 36m
1 stop
$174Multiple Airlines
Tue, Aug 25 - Tue, Sep 1
American Airlines Logo
9:36 am - 1:41 pm
ABE
-
DEN
6h 05m
1 stop
American Airlines Logo
12:23 pm - 10:40 pm
DEN
-
ABE
8h 17m
1 stop
$327American Airlines
Tue, Aug 25 - Tue, Sep 1
American Airlines Logo
6:00 am - 2:24 pm
ABE
-
DEN
10h 24m
2 stops
American Airlines Logo
2:21 pm - 10:40 pm
DEN
-
ABE
6h 19m
1 stop
$332American Airlines
Sat, Aug 22 - Wed, Aug 26
Delta Logo
6:09 pm - 11:05 pm
ABE
-
DEN
6h 56m
1 stop
Delta Logo
7:19 am - 5:23 pm
DEN
-
ABE
8h 04m
1 stop
$341Delta
Tue, Aug 25 - Wed, Aug 26
Delta Logo
6:16 am - 1:17 pm
ABE
-
DEN
9h 01m
1 stop
Delta Logo
7:19 am - 5:23 pm
DEN
-
ABE
8h 04m
1 stop
$341Delta
Wed, Sep 2 - Sat, Sep 5
United Airlines Logo
5:36 pm - 9:44 pm
ABE
-
DEN
6h 08m
1 stop
United Airlines Logo
7:45 am - 5:01 pm
DEN
-
ABE
7h 16m
1 stop
$359United Airlines
Thu, Aug 27 - Sun, Aug 30
United Airlines Logo
5:36 pm - 9:44 pm
ABE
-
DEN
6h 08m
1 stop
United Airlines Logo
7:45 am - 4:56 pm
DEN
-
ABE
7h 11m
1 stop
$359United Airlines
Booking Insights

KAYAK's insights & trends for Allentown to Denver flights

Get data-powered insights and trends into flights from Allentown to Denver to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Allentown to Denver?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Allentown to Denver departing in September.

Flight prices are below average for this route right now.

Flights to Denver from Allentown usually cost between $178 and $331 in September.
The lowest price found in the past 5 days was $129 on Allegiant Air (Sep 28-Oct 2).

What’s the cheapest day of the week to fly from Allentown to Denver?

The average price of all round-trip flights from Allentown to Denver clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Denver on a Sunday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Allentown to Denver. For your return ticket, we recommend flying on a Thursday and avoiding Mondays for the best deals.

What is the cheapest month to fly from Allentown to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Allentown to Denver, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Allentown to Denver is October, where tickets cost $205 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $580 and $464 respectively.

Can I save money by flying with a layover from Allentown to Denver?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $290, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Allentown to Denver?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Allentown to Denver, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Allentown to Denver, you should book around 3 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low season

March

Cheapest flight

$64
Best time to beat the crowds but there is an average 76% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Allentown to Denver

When to book flights from Allentown to Denver

Are your dates flexible? Find out the best times to travel from Allentown to Denver based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Allentown to Denver

  • How many flights are there between Allentown and Denver per day?

    There is a maximum of 1 nonstop flight a day that takes off from Allentown and lands in Denver, with an average flight time of 3h 57m. The most common departure time is 7:00 am and most flights take off in the morning. Each week, there are 2 flights.

  • What is the cheapest flight from Allentown to Denver?

    In the last 5 days, the lowest price for a flight from Allentown to Denver was $64 for a one-way ticket and $129 for a round-trip.

  • Do I need a passport to fly between Allentown and Denver?

    No

  • Which airlines offer Wi-Fi service onboard planes from Allentown to Denver?

    American Airlines, and Delta offer inflight Wi-Fi service on the Allentown to Denver flight route.

  • Which aircraft models fly most regularly from Allentown to Denver?

    The Airbus A320-100/200 is the aircraft model that flies most regularly on the Allentown to Denver flight route.

  • Which airline alliances offer flights from Allentown to Denver?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Allentown and Denver, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Allentown to Denver?

    You can catch a nonstop flight from Allentown to Denver on on Monday, and Friday.

  • Which is the best airline for flights from Allentown to Denver, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Allentown to Denver are Delta and United Airlines. With an average price for the route of $365 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $488 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Allentown to Denver?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Allentown to Denver.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Allentown to Denver?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Denver from Allentown is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Allentown to Denver?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Denver with an airline and back to Allentown with another airline. Booking your flights between Allentown and DEN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Allentown to Denver?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Denver from Allentown up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Allentown to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $89 or less one-way and $191 or less round-trip.

Prefer to fly direct from Allentown to Denver?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Allentown-Bethlehem to Denver Intl.
Find which airlines fly direct from Allentown-Bethlehem Airport to Denver Intl Airport, which days they fly and book direct flights.

Direct departures

Allentown-Bethlehem to Denver Intl

Monday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

See more direct flights

Direct returns

Denver Intl to Allentown-Bethlehem

Monday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

See more direct flights

Reviews of the top 4 airlines serving from Allentown to Denver

 
See real verified KAYAK customer reviews for airlines flying from Allentown to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Allentown to Denver? 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 8486 reviews
7.8Entertainment
8.5Crew
8.1Boarding
7.8Comfort
7.2Food
Airline reviews

No Internet, no backseat screen, no nothing. I bought a Delta ticket and ended up on American Airlines. How did that happen?

6.0 GoodAlexander, Jul 2026
MDT - ATL
Read more Delta reviews

No Internet, no backseat screen, no nothing. I bought a Delta ticket and ended up on American Airlines. How did that happen?

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.

Flight was late, the only reason I almost missed my flight was that my connection was also late.

We flew business fares. Was amazing. However, the check in didn't offer business fares preboarding which is less hectic. 8/10 due to this. Staff compared to Canadian carriers go above and beyond. Would gladly fly United again.

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Late- that’s what United does best. Missed my connection, rebooked to a flight 17 hours later and had to spend $500 on a hotel. What did I get? A $15 meal voucher. What can you get in an airport for $15. I hate United so much.

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.

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.

It was poor a four hour delay and no explanation for the delay. What’s a 35 dollars going to do. It also made me miss my car rental,

It was on time. Flight was comfortable. Staff was nice. It was the way a flight should always be.

The price was the only good thing about this flight. It was scary during takeoff when the plane tilted side to side. It made me feel very nervous as I have never had a take-off that unsmooth. There was no on-flight movie or music options and the only complimentary option was water. Other airlines offer trail mix or a caramel cookie and pop options as complimentary. This flight was a 2.5 hour flight. I understand for shorter flights not having options, but a flight 2 hours or longer should offer more complimentary options and in flight entertainment. Also the seats did not recline and for a longer flight reclining seats are a must for comfort.

A very pleasant flight but it would be greatly improved with wifi to help entertain kids

This is a no frills, get it done, efficient airline. The seat is a lawn chair. You better bring your own entertainment. If you want something other than water you need to pay for it. But they will get you to your destination quickly, on time, and then they will turn the flight around and go right back where they came from. Reliably. Couple times a week tops. If it fits into your schedule, you can’t get there cheaper or faster.

A three hour delay to board and then another hour on the tarmac because they couldn't get a tractor? Ugh.

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.

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.

Our bags took a long time to get unloaded once we landed.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

One of the best flights I’ve had. So smooth.

Because I can’t stand very long in one place, I was allowed to reword.

Flight to Phoenix was delayed 1 hour and was not weather related. Flight Denver was delayed 2.5 hours and again was not weather related as the plane came from San Francisco.

Flight was late because our pilots were late. Also the air vents above our seat didn't work.

Everything you need to know for your flight from Allentown to Denver

Information on your arrival and departure airports