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$153+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — DEN
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Find cheap flights from Allentown to Denver with Cheapflights

1. Tell us where you want to go

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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 Wednesday 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 January 26, 2026.

This Delta deal was found by Cheapflights users on 1/25. 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.
Tue 3/35:58 pm
ABE
-
DEN
1 stop6h 50m
Delta
Tue 3/103:15 pm
DEN
-
ABE
1 stop5h 41m
Delta
Deal found 1/25$238
This Delta deal was found by Cheapflights users on 1/25. 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.
Mon 3/25:58 pm
ABE
-
DEN
1 stop6h 50m
Delta
Tue 3/103:15 pm
DEN
-
ABE
1 stop5h 41m
Delta
Deal found 1/25$248
This Gotogate deal was found by Cheapflights users on 1/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/82:47 pm
ABE
-
DEN
Nonstop4h 02m
Allegiant Air
Fri 6/126:00 pm
DEN
-
ABE
Nonstop3h 27m
Allegiant Air
Deal found 1/24$255
This Delta deal was found by Cheapflights users on 1/25. 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.
Tue 3/35:58 pm
ABE
-
DEN
1 stop8h 25m
Delta
Wed 3/117:05 am
DEN
-
ABE
1 stop8h 12m
Delta
Deal found 1/25$267
This Delta deal was found by Cheapflights users on 1/25. 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.
Fri 3/65:58 pm
ABE
-
DEN
1 stop8h 25m
Delta
Tue 3/103:15 pm
DEN
-
ABE
1 stop5h 41m
Delta
Deal found 1/25$268
This Delta deal was found by Cheapflights users on 1/25. 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.
Mon 3/25:58 pm
ABE
-
DEN
1 stop6h 50m
Delta
Wed 3/117:05 am
DEN
-
ABE
1 stop8h 12m
Delta
Deal found 1/25$277
This Delta deal was found by Cheapflights users on 1/25. 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.
Thu 3/55:58 pm
ABE
-
DEN
1 stop8h 25m
Delta
Tue 3/103:15 pm
DEN
-
ABE
1 stop5h 41m
Delta
Deal found 1/25$290
This Delta deal was found by Cheapflights users on 1/25. 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.
Fri 3/65:58 pm
ABE
-
DEN
1 stop8h 25m
Delta
Wed 3/117:05 am
DEN
-
ABE
1 stop8h 12m
Delta
Deal found 1/25$297
This American Airlines deal was found by Cheapflights users on 1/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1712:45 pm
ABE
-
DEN
2 stops11h 52m
American Airlines
Wed 3/254:03 pm
DEN
-
ABE
1 stop6h 26m
American Airlines
Deal found 1/24$302
This Kiwi.com deal was found by Cheapflights users on 1/23. 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.
Mon 7/132:57 pm
ABE
-
DEN
Nonstop4h 00m
Allegiant Air
Fri 7/175:47 pm
DEN
-
ABE
Nonstop3h 28m
Allegiant Air
Deal found 1/23$317
This Delta deal was found by Cheapflights users on 1/25. 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.
Thu 3/55:58 pm
ABE
-
DEN
1 stop8h 25m
Delta
Wed 3/117:05 am
DEN
-
ABE
1 stop8h 12m
Delta
Deal found 1/25$319
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Fri 6/123:08 pm
ABE
-
DEN
Nonstop4h 02m
Allegiant Air
Mon 6/156:00 pm
DEN
-
ABE
Nonstop3h 27m
Allegiant Air
Deal found 1/25$323

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$238
(Delta)

One-way from

$153
(Kiwi.com)

Popular in

February

Cheapest in

September

Average price

$333

Good round-trip deal

$291 or less

Good one-way deal

$158 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. 18% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Allentown-Bethlehem to Denver Intl.
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 January 26, 2026.
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

Wed 3/4

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Tue 3/10

3:15 pm-10:56 pm

1 stop5h 41m

$238

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Mon 3/2

5:58 pm-10:48 pm

1 stop6h 50m

Denver Intl

Tue 3/10

3:15 pm-10:56 pm

1 stop5h 41m

$248

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Tue 3/3

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Wed 3/11

7:05 am-5:17 pm

1 stop8h 12m

$267

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Fri 3/6

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Tue 3/10

3:15 pm-10:56 pm

1 stop5h 41m

$268

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 3/5

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Wed 3/11

7:05 am-5:17 pm

1 stop8h 12m

$319

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Wed 3/4

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Sat 3/7

7:05 am-5:12 pm

1 stop8h 07m

$328

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Wed 3/4

5:58 pm-12:23 am

1 stop8h 25m

Denver Intl

Thu 3/5

2:45 pm-10:49 pm

1 stop6h 04m

$336

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Mon 3/2

5:58 pm-10:48 pm

1 stop6h 50m

Denver Intl

Sat 3/7

7:05 am-5:12 pm

1 stop8h 07m

$338

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Wed 3/11

6:04 am-3:53 pm

2 stops11h 49m

Denver Intl

Wed 3/18

4:03 pm-12:29 am

1 stop6h 26m

$342

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Fri 2/20

6:04 am-10:51 am

1 stop6h 47m

Denver Intl

Mon 2/23

4:03 pm-12:29 am

1 stop6h 26m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 17 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-Denver flight deals on Cheapflights vs. FlightHub >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 Expedia the most. Expedia 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 January 23, 2026.

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.

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 January 26, 2026.
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
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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
8,113 reviews
Delta
7.9
Good
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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
9,199 reviews
Delta
7.9
Good
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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
11,189 reviews
Delta
7.9
Good
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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
706 reviews
Delta
7.9
Good
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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
5.7
Fair
3,057 reviews
Delta
7.9
Good
8,113 reviews

Food

7.2

Entertainment

7.8

Overall

7.9

Crew

8.5

Boarding

8.1

Comfort

7.9

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 25m. Delta provides one of the quickest options available for as low as $238. 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 75% 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 ($60), American Airlines ($80), and United Airlines ($102).

  • What are the cheapest flights from Allentown to Denver?

    While on average a flight from Allentown to Denver is generally $262, our data shows the cheapest flight currently is $158. When looking at the most popular route, (Allentown-Bethlehem - Denver Intl), you can expect to pay $255 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
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Centennial
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Cripple Creek
Winter Park
Central City
Glendale
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen

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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State College to Denver flights
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Dulles Intl to Gunnison flights

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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$75Average$186FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$116Average$218FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$189Average$347FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$208Average$429FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$359FlexibilityNo cancel feeOn-timeN/A

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