DEN - ABE

$129 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 2/14. 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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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, Dec 3 - Wed, Dec 10
American Airlines Logo
7:49 am - 3:53 pmDEN-ABE
6h 04m1 stop
American Airlines Logo
1:48 pm - 8:34 pmABE-DEN
8h 46m1 stop
$218American Airlines
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Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
6:21 am - 3:53 pmDEN-ABE
7h 32m1 stop
American Airlines Logo
1:48 pm - 10:20 pmABE-DEN
10h 32m2 stops
$223American Airlines
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Wed, Dec 3 - Sun, Dec 7
Multiple Airlines Logo
11:59 pm - 8:36 pmDEN-ABE
18h 37m1 stop
Multiple Airlines Logo
7:30 am - 8:57 pmABE-DEN
15h 27m1 stop
$239Multiple Airlines
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Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
10:21 am - 10:58 pmDEN-ABE
10h 37m2 stops
American Airlines Logo
1:48 pm - 10:20 pmABE-DEN
10h 32m2 stops
$250American Airlines
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Wed, Feb 18 - Sat, Feb 21
Delta Logo
3:10 pm - 10:52 pmDEN-ABE
5h 42m1 stop
Delta Logo
5:40 pm - 10:22 pmABE-DEN
6h 42m1 stop
$257Delta
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Wed, Feb 18 - Sat, Feb 21
Delta Logo
3:10 pm - 10:52 pmDEN-ABE
5h 42m1 stop
Delta Logo
5:40 pm - 10:22 pmABE-DEN
6h 42m1 stop
$263Delta
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Wed, Dec 3 - Sun, Dec 7
Multiple Airlines Logo
12:59 am - 8:36 pmDEN-ABE
17h 37m2 stops
Multiple Airlines Logo
7:30 am - 8:57 pmABE-DEN
15h 27m1 stop
$267Multiple Airlines
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Tue, Dec 9 - Wed, Dec 10
Delta Logo
1:16 pm - 10:11 pmDEN-ABE
6h 55m1 stop
Delta Logo
12:54 pm - 5:52 pmABE-DEN
6h 58m1 stop
$278Delta
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Mon, Feb 9 - Sat, Feb 14
United Airlines Logo
5:42 pm - 4:22 pmDEN-ABE
20h 40m2 stops
United Airlines Logo
6:33 am - 10:39 amABE-DEN
6h 06m1 stop
$420United Airlines
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Mon, Feb 9 - Sat, Feb 14
United Airlines Logo
8:25 pm - 9:15 pmDEN-ABE
22h 50m1 stop
United Airlines Logo
2:55 pm - 10:05 pmABE-DEN
9h 10m1 stop
$432United Airlines
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Everything you should know

Top airlines
American Airlines
Cheapest • from $218 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 37% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$218
Overall average: $487
American Airlines
Wed 12/3Wed 12/10
DEN - ABE • 1 stop
Cheapest one-way
$129
Typical prices: $238-$439
Delta
Sat 2/14
DEN - ABE • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Allentown!
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 Fridays and the most expensive ones on Tuesdays.

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 $188 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $487 and $403 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.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure 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 average of all the values for each week.

To get a below average price on the flight from Denver to Allentown, you should book around 3 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$129
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 37% 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 $129 for a one-way ticket and $218 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 $488 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 $468 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 $137 or less one-way and $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 7992 reviews
7.9Comfort
7.9Entertainment
8.5Crew
8.2Boarding
7.3Food
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

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

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

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.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Internet was a bit expensive and did not work ask that week otherwise a good flight

The flight had a delay that made me being in a real rush to take the second flight. The delay was almost for 2 hours. They moved us from gate to gate in 4 times. Once I arrived to Philadelphia, I got to run thorough all the airport, as the train was already closed by that time. So I got sick with asthma for all the running I had to do. And I was the last one to board, when it was almost closed. So irresponsable with the people

Above and beyond effort from this crew in a tough situation. So helpful and understanding. Thank you!

Mechanical delay and no compensation. Missed connection as a result of their delay. Mediocre performance and service. Horrible airline currently with horrible culture.

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

It was canceled. The flight wasn’t rescheduled, everyone had to figure out their own new arrangements. They said we would get refunded our original fare and receive an additional $150. We received links for $100 only and they expired before we could activate them.

The plane had originated in Las Vegas at 6:30 in the morning and flew to Moline where we boarded. The flight left around 12:30 PM and there were no boxed snacks available and many of the alcoholic beverages were unavailable. I would find it hard to believe that that many of the passengers coming from Las Vegas at 6:30 in the morning, drank and ate that much of the items. I can only come to the conclusion that someone failed to stock the plane for the round-trip. This is a huge revenue failure for the airline and disappointment for the passengers. The flight crew did not seem happy to be there and did not engage with passengers. Allegiant you can do better.

They did not let my husband on the plane with our service animal at the last minute. Do NOT fly this airline with a service animal!

Tight! Seats are not designed for those of us who wear extra-large clothes.

The non-stop flight from Grand Rapids was excellent. I neither expected or needed a budget flight and Allegiant made the trip easy and for an affordable price, Arriving at the Mesa Airport (AZA) is a delight compared to the international airport. For our return flight, we were able to arrive 75 minutes before the flight, return the rental car, check our bag and make it to the gate in plenty of time. That would never happen at most airports.

Easiest flights I’ve ever taken. Plane was comfortable without overly crowded seating.

Terrible. Still have not received the refund from them. They sent it to some account that I don't even know. Spoke with costumer service and they are unable to help.

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

Information on your arrival and departure airports

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