ABE - DEN

$49 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 8/17. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Allentown to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Allentown to Denver, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$129
Typical prices: $290-$164
Allegiant Air
Mon 9/28Fri 10/2
ABE - DEN • Non-stop
Cheapest one-way
$49
Typical prices: $107-$203
Allegiant Air
Mon 8/17
ABE - DEN • Non-stop
Nonstop flights
Mon, Fri
You can fly direct with Allegiant Air. Average duration is 4h 01m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top airlines
Cheapest • from $129 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
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
Mon, Sep 7 - Fri, Sep 11
Allegiant Air Logo
8:00 am - 9:46 am
ABE
-
DEN
3h 46mnonstop
Allegiant Air Logo
9:36 am - 3:08 pm
DEN
-
ABE
3h 32mnonstop
$134Allegiant Air
Mon, Aug 31 - Fri, Sep 4
Allegiant Air Logo
7:30 am - 9:22 am
ABE
-
DEN
3h 52mnonstop
Allegiant Air Logo
10:06 am - 3:38 pm
DEN
-
ABE
3h 32mnonstop
$135Allegiant Air
Mon, Sep 14 - Fri, Sep 18
Allegiant Air Logo
7:30 am - 9:16 am
ABE
-
DEN
3h 46mnonstop
Allegiant Air Logo
9:36 am - 3:08 pm
DEN
-
ABE
3h 32mnonstop
$136Allegiant Air
Mon, Oct 26 - Fri, Oct 30
Allegiant Air Logo
7:30 am - 9:24 am
ABE
-
DEN
3h 54mnonstop
Allegiant Air Logo
10:14 am - 3:42 pm
DEN
-
ABE
3h 28mnonstop
$144Allegiant Air
Mon, Sep 14 - Fri, Sep 25
Allegiant Air Logo
7:30 am - 9:16 am
ABE
-
DEN
3h 46mnonstop
Allegiant Air Logo
9:36 am - 3:08 pm
DEN
-
ABE
3h 32mnonstop
$148Allegiant Air
Fri, Oct 30 - Mon, Nov 2
Allegiant Air Logo
7:30 am - 9:24 am
ABE
-
DEN
3h 54mnonstop
Allegiant Air Logo
10:14 am - 3:42 pm
DEN
-
ABE
3h 28mnonstop
$151Allegiant Air
Fri, Oct 23 - Mon, Nov 2
Allegiant Air Logo
7:30 am - 9:24 am
ABE
-
DEN
3h 54mnonstop
Allegiant Air Logo
10:14 am - 3:42 pm
DEN
-
ABE
3h 28mnonstop
$152Allegiant Air
Fri, Sep 4 - Fri, Sep 11
Allegiant Air Logo
7:30 am - 9:16 am
ABE
-
DEN
3h 46mnonstop
Allegiant Air Logo
9:36 am - 3:08 pm
DEN
-
ABE
3h 32mnonstop
$157Allegiant Air
Mon, Oct 26 - Mon, Nov 2
Allegiant Air Logo
7:30 am - 9:24 am
ABE
-
DEN
3h 54mnonstop
Allegiant Air Logo
10:14 am - 3:42 pm
DEN
-
ABE
3h 28mnonstop
$159Allegiant Air
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.

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 September, where tickets cost $206 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $539 and $383 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 $260, 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 5 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$49
Best time to beat the crowds but there is an average 74% increase in price.
Most popular time to fly and prices are also 4% 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

  • 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 $49 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 $376 and an overall rating of 7.9, 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 $93 or less one-way and $188 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.
7.9
DeltaOverall score based on 8402 reviews
8.5Crew
7.8Entertainment
8.1Boarding
7.8Comfort
7.2Food
Airline reviews

Five hour delays every hour, I wish it were all at once

2.0 MediocreAnonymous, Jun 2026
MCO - LGA
Read more Delta reviews

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

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.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

Seats were very uncomfortable and being charged for snacks and water.........

Allegiant actually impressed me, original inbound flight from PBG was so late they gave us a bird inbound from Des Moines and only left 1h late and gained 40 minutes back in the air. Comfortable flight with no frills but no complaints.

Flight was delayed. Crew was good but hot coffee was not available.

Great. No choice for n/a. No food or entertainment options

No food is available without purchasing it and there is no in-flight entertainment. Both of these are OK because we got an inexpensive flight from Allegiant and, otherwise, our experience was excellent.

just had water and there was plenty of leg & seat room. But then i don't weight 220#s!!

Not totally their fault- screaming kids that had zero parent intervention.

It was cold on the flight. The crew was very pleasant. I didn't order any food. We were delayed due to Captain waiting on maintenance log. He kept us informed though. The flight itself was smooth. I would definitely fly with Allegiant again!

I had a fantastic experience with Allegiant. I had wheelchair assistance and they helped me find my luggage and brought me to my car. Even loaded my luggage. Wonderful service!! Thank you Allegiant!

Superb. Staff great. Great flight. As with other airlines, seating too tight and restrictive.

Fine. Nothing to write home about. The plane left on time, and arrived on time.

Seat comfort was poor (no lumbar or lower back support).

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

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.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

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

I appreciate that I finally got the seat I paid extra for this time. Thank you

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

Information on your arrival and departure airports