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$135+ Cheap flights from Allentown to Denver (ABE - DEN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — DEN
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Allentown-Bethlehem to Denver Intl are usually found in September or October, booked 66 days in advance, depart on a Friday or Saturday and return on a Monday

Cheap flight deals from Allentown to Denver

Cheapest flights from Allentown to Denver
Explore the most affordable flight options available from Allentown to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:17 amABE - DEN
1 stop8h 37mUnited Airlines
jue. 1/16:00 amDEN - ABE
1 stop8h 30mUnited Airlines
Deal found 12/10$459
This Delta deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/136:00 pmABE - DEN
1 stop6h 53mDelta
mar. 12/1611:34 amDEN - ABE
1 stop8h 37mDelta
Deal found 12/9$484
This Delta deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/186:00 pmABE - DEN
1 stop6h 53mDelta
mié. 12/242:30 pmDEN - ABE
1 stop6h 16mDelta
Deal found 12/11$489
This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/106:30 amABE - DEN
1 stop7h 55mUnited Airlines
mar. 12/1611:21 amDEN - ABE
1 stop8h 25mUnited Airlines
Deal found 12/9$519
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/191:34 pmABE - DEN
2 stops44h 09mMultiple Airlines
lun. 12/222:33 pmDEN - ABE
1 stop22h 42mMultiple Airlines
Deal found 12/11$551
This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/245:07 pmABE - DEN
1 stop6h 59mUnited Airlines
lun. 12/298:26 pmDEN - ABE
1 stop18h 04mUnited Airlines
Deal found 12/9$572
This Kiwi.com deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/117:30 amABE - DEN
1 stop16h 19mMultiple Airlines
jue. 12/1810:46 amDEN - ABE
2 stops34h 03mMultiple Airlines
Deal found 12/9$574
This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/106:30 amABE - DEN
1 stop7h 55mUnited Airlines
vie. 12/196:00 amDEN - ABE
1 stop8h 30mUnited Airlines
Deal found 12/9$579
This Kiwi.com deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/317:00 amABE - DEN
2 stops16h 49mMultiple Airlines
vie. 1/22:33 pmDEN - ABE
1 stop25h 27mMultiple Airlines
Deal found 12/10$614
This United Airlines deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/186:17 amABE - DEN
1 stop8h 37mUnited Airlines
mié. 12/247:00 pmDEN - ABE
2 stops19h 30mUnited Airlines
Deal found 12/11$618

Find flight deals from Allentown to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$253
(Delta)

One-way from

$135
(Delta)

Popular in

December

Cheapest in

September

Average price

$429

Good one-way deal

$132 or less
Provider with most accurate pricing for Allentown-Bethlehem-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Allentown-Bethlehem-Denver Intl flights.
Search Deals
From Allentown-Bethlehem to Denver Intl
Search Deals
One-way flight from Allentown-Bethlehem to Denver Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from Allentown-Bethlehem to Denver Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to Denver that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 2025.
Use the filters below to find and compare flights from Allentown to Denver that are best for you.

Fly from

Allentown

Fly to

Denver

Route

Depart

Return

Price

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

mar. 2/17

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

mié. 2/25

7:05 am-5:16 pm

1 stop8h 11m

$269

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

sáb. 2/28

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

mar. 3/3

12:00 pm-10:45 pm

1 stop8h 45m

$299

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

mié. 2/25

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

mar. 3/3

1:12 pm-10:45 pm

1 stop7h 33m

$299

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

vie. 1/23

5:59 pm-10:50 pm

1 stop6h 51m

Denver Intl

vie. 1/30

1:16 pm-10:50 pm

1 stop7h 34m

$309

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

vie. 2/20

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

mié. 2/25

1:12 pm-10:45 pm

1 stop7h 33m

$314

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

jue. 2/19

2:14 pm-10:59 pm

1 stop10h 45m

Denver Intl

jue. 2/26

12:59 am-8:30 pm

2 stops17h 31m

$333

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

vie. 1/16

5:59 pm-10:55 pm

1 stop6h 56m

Denver Intl

mar. 1/20

7:05 am-5:14 pm

1 stop8h 09m

$344

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

vie. 2/27

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

mar. 3/3

1:12 pm-10:45 pm

1 stop7h 33m

$354

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

mar. 2/17

12:45 pm-5:46 pm

1 stop7h 01m

Denver Intl

mar. 2/24

1:25 pm-11:23 pm

1 stop7h 58m

$359

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

vie. 2/20

5:58 pm-12:25 am

1 stop8h 27m

Denver Intl

sáb. 2/28

2:45 pm-10:45 pm

1 stop6h 00m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 21 results
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Compare providers for flights from Allentown to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to Denver in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Allentown-Denver flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Allentown-Denver flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Allentown-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Allentown-Denver flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Allentown to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Allentown with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Allentown to Denver. Price data was last updated on December 5, 2025.

Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from Allentown to Denver. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Allentown to Denver?

Currently, August is the cheapest month in which you can book a flight from Allentown to Denver (average of $109). Flying from Allentown to Denver in July is currently the most expensive (average of $175). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ABE to DEN?

Find hourly flight availability from Allentown to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 12, 2025.

It’s typically best to fly out from Allentown to Denver in the morning. Doing so could potentially save you 49% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Allentown to Denver. Price data was last updated on December 6, 2025.

Travelers seeking maximum savings on their Allentown to Denver flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated diciembre 12, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Allentown to Denver. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,095 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,048 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Allegiant Air
7.2
Good
699 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.8
Fair
3,084 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Allentown to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Allentown to Denver flight route?

    Flights from Allentown-Bethlehem to Denver Intl have been viewed 9 times in the past calendar month.

  • How long is the flight from Allentown to Denver?

    A quick flight from Allentown to Denver can take about 8h 27m. Delta provides one of the quickest options available for as low as $269. The distance between Allentown and Denver is about 1534 mi.

  • What are the cheapest airlines flying from Allentown to Denver round-trip?

    Frontier, at $75, was found to be the cheapest airline from Allentown to Denver.Alternate airlines to your destination round-trip include Allegiant Air and American Airlines. Frontier is priced at 76% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Allentown to Denver one-way?

    The cheapest airlines for a one-way flight from Allentown to Denver are Allegiant Air ($53), American Airlines ($94), and Delta ($128).

  • What are the cheapest flights from Allentown to Denver?

    While on average a flight from Allentown to Denver is generally $132, our data shows the cheapest flight currently is $101. When looking at the most popular route, (Allentown-Bethlehem - Denver Intl), you can expect to pay $253 for that flight.

  • Can I find deals for flights from Allentown to Denver that include hotel bookings?

    Yes. In addition to deals on Allentown to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Allentown to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Allentown to Denver.

  • Can I find deals for business class flights from Allentown to Denver?

    Yes. Cheapflights offers flight deals from Allentown to Denver by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Allentown to Denver?

    Currently, August is the cheapest month in which you can book a flight from Allentown to Denver (average of $109). Flying from Allentown to Denver in July is currently the most expensive (average of $175). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Black Hawk
Thornton
Westminster
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Silverthorne
Central City
Frisco
Wheat Ridge
Manitou Springs
Fort Morgan
Brighton
Longmont
Idaho Springs
Parker

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Allentown to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Allentown to Denver

Discover the top 5 airlines that operate flights from Allentown to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$89Average$192FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$120Average$220FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$193Average$361FlexibilityNo cancel feeOn-time71%
DeltaCheapest$262Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$272Average$458FlexibilityNo cancel feeOn-time69%

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