DEN - ABE

$120 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 3/10. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$424
Overall average: $447
United Airlines
Wed 2/25Sat 2/28
DEN - ABE • 1 stop
Cheapest one-way
$120
Delta
Tue 3/10
DEN - ABE • 1 stop
Top airlines
United Airlines
Cheapest • from $424 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 44% price drop
June
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 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

Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
7:45 am - 4:48 pm
DEN
-
ABE
7h 03m
1 stop
United Airlines Logo
2:55 pm - 10:05 pm
ABE
-
DEN
9h 10m
1 stop
$424United Airlines
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
7:45 am - 4:48 pm
DEN
-
ABE
7h 03m
1 stop
United Airlines Logo
2:55 pm - 7:48 pm
ABE
-
DEN
6h 53m
1 stop
$440United Airlines
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
7:45 am - 4:48 pm
DEN
-
ABE
7h 03m
1 stop
United Airlines Logo
2:55 pm - 10:05 pm
ABE
-
DEN
9h 10m
1 stop
$450United Airlines
Sun, Feb 15 - Thu, Feb 19
American Airlines Logo
4:03 pm - 12:29 am
DEN
-
ABE
6h 26m
1 stop
American Airlines Logo
12:00 pm - 6:51 pm
ABE
-
DEN
8h 51m
1 stop
$457American Airlines
Sun, Feb 15 - Thu, Feb 19
American Airlines Logo
12:21 pm - 12:29 am
DEN
-
ABE
10h 08m
2 stops
American Airlines Logo
6:04 am - 1:24 pm
ABE
-
DEN
9h 20m
1 stop
$462American Airlines
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
7:45 am - 4:48 pm
DEN
-
ABE
7h 03m
1 stop
United Airlines Logo
6:28 am - 6:02 pm
ABE
-
DEN
13h 34m
2 stops
$464United Airlines
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
5:55 pm - 10:01 am
DEN
-
ABE
14h 06m
2 stops
United Airlines Logo
5:23 pm - 10:05 pm
ABE
-
DEN
6h 42m
1 stop
$481United Airlines
Sat, Mar 7 - Sun, Mar 15
Delta Logo
7:05 am - 5:12 pm
DEN
-
ABE
8h 07m
1 stop
Delta Logo
5:58 pm - 10:17 pm
ABE
-
DEN
6h 19m
1 stop
$488Delta
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
5:55 pm - 10:01 am
DEN
-
ABE
14h 06m
2 stops
United Airlines Logo
2:55 pm - 7:48 pm
ABE
-
DEN
6h 53m
1 stop
$491United Airlines
Mon, Apr 27 - Fri, May 1
American Airlines Logo
3:59 pm - 12:22 am
DEN
-
ABE
6h 23m
1 stop
American Airlines Logo
6:04 am - 10:39 am
ABE
-
DEN
6h 35m
1 stop
$501American 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 Tuesday 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 Mondays.

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 December and January, where the average cost of round-trip tickets is $505 and $488 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 $188, prices are generally cheapest when you fly direct.

Good to know

Low seasonFebruary
Cheapest flight$120
Best time to beat the crowds but there is an average 38% increase in price.
Most popular time to fly and prices are also 21% 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 $120 for a one-way ticket and $424 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 A320-100/200 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 $443 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 $499 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 $289 or less round-trip.

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 8130 reviews
8.5Crew
7.2Food
8.1Boarding
7.9Comfort
7.8Entertainment
Airline reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

2.0 MediocreTodd, Jan 2026
IAH - ATL
Read more Delta reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

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.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

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.

Crew were all friendly and helpful. It was a short flight so just a beverage service with a cookie. After we were boarded the plane took about 45 minutes to leave the gate but it was New Year’s Eve so not shocking there was some delay. Overall good experience and very grateful.

Flight was on time is the only good thing. Person loading the plane called 1-6 to board at the same time, made it chaotic. Plane was too small for even putting backpacks in overhead. Seat for normal sized people were too small. The WIFI didn't work. When we landed had to wait because not enough ground crew.

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

the trip to madrid was uncomfortable with my legs touching the seat in front of me

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Very crowded flight but what can you expect these days?? Crew was accommodating.

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.

I liked how when I got on board how fast we ended up taking off but what I truly disliked was how uncomfortable the seats were. There was truly never a time that I could ever get comfortable during both of my flights. The seats could get away during shorter flights but flights 3 hour plus makes it hard to enjoy.

The crew was great and the flight was very smooth. Can’t really judge food since I did not get any because it costs money. The seat was comfortable for what we bought. Thanks!

Crew was great. No entertainment and food and beverage was for purchase only, even water

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

Information on your arrival and departure airports