DEN - ABE

$54 Find Cheap Flights from Denver to Allentown

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Allentown departing on 5/22. 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 Allentown

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Allentown, 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 Denver to Allentown, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$204
Overall average: $205
Allegiant Air
Fri 5/29Mon 6/1
DEN - ABE • Non-stop
Cheapest one-way
$54
Typical prices: $68-$92
Allegiant Air
Fri 5/22
DEN - ABE • Non-stop
Nonstop flights
2 days a week
Mon, Fri
You can fly direct with Allegiant Air. Average duration is 0
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
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Top airlines
Cheapest • from $204 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Top layover airports
Cheapest • Avg $367 (round-trip)
Shortest trip • 6h 23m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 48% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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We hope you love your trip to Allentown!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Denver to Allentown (DEN-ABE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Allentown 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 Denver to Allentown

Fri, May 29 - Mon, Jun 1
Allegiant Air Logo
5:42 pm - 11:04 pm
DEN
-
ABE
3h 22mnonstop
Allegiant Air Logo
2:50 pm - 4:52 pm
ABE
-
DEN
4h 02mnonstop
$204Allegiant Air
Fri, Aug 7 - Mon, Aug 17
Allegiant Air Logo
5:46 pm - 11:14 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
2:54 pm - 4:56 pm
ABE
-
DEN
4h 02mnonstop
$214Allegiant Air
Fri, Aug 7 - Mon, Aug 17
Allegiant Air Logo
5:46 pm - 11:14 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
2:54 pm - 4:56 pm
ABE
-
DEN
4h 02mnonstop
$215Allegiant Air
Mon, Aug 10 - Mon, Aug 17
Allegiant Air Logo
5:46 pm - 11:14 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
2:54 pm - 4:56 pm
ABE
-
DEN
4h 02mnonstop
$225Allegiant Air
Fri, Jun 5 - Mon, Jun 8
Allegiant Air Logo
10:22 am - 3:49 pm
DEN
-
ABE
3h 27mnonstop
Allegiant Air Logo
7:30 am - 9:32 am
ABE
-
DEN
4h 02mnonstop
$237Allegiant Air
Fri, Aug 7 - Fri, Aug 14
Allegiant Air Logo
5:46 pm - 11:14 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
2:54 pm - 4:56 pm
ABE
-
DEN
4h 02mnonstop
$255Allegiant Air
Mon, Aug 10 - Fri, Aug 14
Allegiant Air Logo
5:46 pm - 11:14 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
2:54 pm - 4:56 pm
ABE
-
DEN
4h 02mnonstop
$266Allegiant Air
Fri, Jul 3 - Mon, Jul 6
Allegiant Air Logo
10:20 am - 3:48 pm
DEN
-
ABE
3h 28mnonstop
Allegiant Air Logo
7:30 am - 9:30 am
ABE
-
DEN
4h 00mnonstop
$269Allegiant Air
Tue, Apr 21 - Sat, Apr 25
American Airlines Logo
3:00 pm - 11:28 pm
DEN
-
ABE
6h 28m
1 stop
American Airlines Logo
6:04 am - 10:39 am
ABE
-
DEN
6h 35m
1 stop
$277American Airlines
Sat, Apr 25 - Tue, Apr 28
American Airlines Logo
3:59 pm - 12:22 am
DEN
-
ABE
6h 23m
1 stop
American Airlines Logo
6:00 am - 12:35 pm
ABE
-
DEN
8h 35m
1 stop
$297American Airlines
Booking Insights

KAYAK's insights & trends for Denver to Allentown flights

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

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

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

When flying from Denver to Allentown, you should consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Denver, you’ll find the best rates on Wednesdays and the most expensive ones on Fridays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Allentown, 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 Denver to Allentown is October, where tickets cost $180 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $692 and $515 respectively.

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

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 $448, prices are generally cheapest when you fly direct.

Good to know

Low seasonFebruary
Cheapest flight$54
Best time to beat the crowds but there is an average 48% increase in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from Denver to Allentown

When to book flights from Denver to Allentown

Are your dates flexible? Find out the best times to travel from Denver to Allentown 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 Denver to Allentown

  • What is the cheapest flight from Denver to Allentown?

    In the last 3 days, the lowest price for a flight from Denver to Allentown was $54 for a one-way ticket and $204 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Denver to Allentown?

    When flying out of Denver you will be using Denver Intl. You will be landing at Allentown, also known as Allentown-Bethlehem.

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

    Only American Airlines offers inflight Wi-Fi service on the Denver to Allentown flight route.

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

    The Airbus A321neo is the aircraft model that flies most regularly on the Denver to Allentown flight route.

  • Which airline alliances offer flights from Denver to Allentown?

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

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

    The two airlines most popular with KAYAK users for flights from Denver to Allentown are Delta and United Airlines. With an average price for the route of $403 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 $507 and an overall rating of 7.4.

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

    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 Denver to Allentown.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Allentown from Denver 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 Denver to Allentown?

    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 Allentown with an airline and back to Denver with another airline. Booking your flights between Denver and ABE 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 Denver to Allentown?

    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 Allentown from Denver 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 Denver to Allentown

  • Looking for a cheap flight? 25% of our users found flights on this route for $61 or less one-way.

Prefer to fly direct from Denver to Allentown?

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

Direct departures

Denver Intl to Allentown-Bethlehem

Monday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

See more direct flights

Direct returns

Allentown-Bethlehem to Denver Intl

Monday

Allegiant Air

Allegiant Air

Friday

Allegiant Air

Allegiant Air

See more direct flights

Reviews of the top 4 airlines serving from Denver to Allentown

 
See real verified KAYAK customer reviews for airlines flying from Denver to Allentown. 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 Denver to Allentown? 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 8288 reviews
7.8Entertainment
7.2Food
8.1Boarding
8.5Crew
7.9Comfort
Airline reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

10.0 ExcellentDebra, Mar 2026
PBI - ATL
Read more Delta reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

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

There is not one likable thing about this airline. It’s starts with the deceptive pricing and continues through the whole flight. The worst staff I’ve ever experienced way over priced bags absolutely no food or drink (unacceptable and you should be embarrassed) the seats are cramped and uncomfortable there is no entertainment there is nothing about this trash airline that constitutes any amount of money. It’s worse than spirit and way more expensive it is disgraceful. Do not travel with Allegiant I repeat do not bother no matter what they say the price is it is never ever going to be the right choice I’m mind blown at how awful the entire experience was I’m embarrassed that I chose so poorly I cannot reiterate enough how beyond horrible this company and its staff are, not one person on this flight or at the airport is qualified to sweep up trash on a city sidewalk they should certainly never be given any job that requires a brain or manners or communication with human beings, what a disgrace to the human race. Your criminal chiselers and should be put out to pasture

Great flight. Friendly staff. Free snacks and drinks would be nice. I would love fewer taxes and fees added on.

My 90 year old father flew with me. He needed wheel chair assistance and is nearly deaf. The staff was amazing with him.

It was fine. Nobody was outstandingly friendly but no one was rude and everything was smooth . The captain thanked us for flying but no one greeted me as I walked on the plane or as I exited which is the least they could do lol

Clean, friendly, roomy. But check-in from the phone link was terrible. Repeated attempts wouldn’t save at the final step. Just kept spinning! It was very frustrating. Finally, I used the app (vs website link) to check-in which worked very smoothly on the first attempt.

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

Excellent flight and even arrived 23 min early. No entertainment , or wi fi on board, but I downloaded a couple of movies beforehand which kept me entertained. Really like flying Allegiant airlines.

WE were delayed about an hour and never any communications from the employees working the gate. We also were moved to a total of three gates.

I love how they show love to their customers and care about them too.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

I was on a small regional flight from Detroit to Philadelphia. When we landed the outside cruise needed to turn something off with the engine, which took quite a long time. Then, when they allowed us to get off the plane it was outside. They took their time, unloading all the luggage and waited till they unloaded all the luggage before they brought it over to us. It was 9 o’clock at night freezing cold out, and there was no proactive hustle to try to get people their luggage. It was really one of the worst experiences I think I’ve ever had with American until a manager came over. I don’t think they were going to even consider pulling the luggage over to the people that had been waiting outside for at least 10 minutes in the freezing cold.

Awful. Original flight was delayed 5 hours. Had to to take a connecting flight instead of direct. Had a 4 hour layover. I missed all of my morning meetings getting in 5 hours later than I was supposed to and had to change to take a later flight the next day to get them back in which cia time another $150.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The seat cushions were very worn so they were extremely uncomfortable.

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

Information on your arrival and departure airports