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$101+ Cheap flights from Denver to Allentown (DEN - ABE)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ABE
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Allentown-Bethlehem are usually found in August or October, booked 34 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Denver to Allentown

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Allentown (ABE). 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 August 14, 2025.

Round-trip from

$141
(Mytrip)

One-way from

$101
(Cheapflightsfares)

Popular in

December

Cheapest in

August

Average price

$194

Good round-trip deal

$136 or less

Good one-way deal

$83 or less
From Denver Intl to Allentown-Bethlehem
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One-way flight from Denver Intl to Allentown-Bethlehem
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Highest demand for flights based on searches. 23% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Denver Intl to Allentown-Bethlehem.
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Price to beat on a one-way flight from Denver Intl to Allentown-Bethlehem.
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Find flight deals from Denver to Allentown

Cheapest flights from Denver to Allentown
Explore the most affordable flight options available from Denver to Allentown. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/289:51 amDEN - ABE
Nonstop3h 22mAllegiant Air
Thu 9/118:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Deal found 8/14$141
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/710:35 amDEN - ABE
Nonstop3h 30mAllegiant Air
Sun 9/148:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Deal found 8/14$158
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:15 amDEN - ABE
Nonstop3h 27mAllegiant Air
Sun 10/127:30 amABE - DEN
Nonstop3h 55mAllegiant Air
Deal found 8/12$159
This Booking.com deal was found by Cheapflights users on 8/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2510:35 amDEN - ABE
Nonstop3h 30mAllegiant Air
Sun 9/288:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Deal found 8/12$174
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 11/17:08 amDEN - ABE
1 stop8h 15mAmerican Airlines
Tue 11/44:30 pmABE - DEN
1 stop6h 38mAmerican Airlines
Deal found 8/14$181
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 12/38:41 amDEN - ABE
1 stop5h 40mAmerican Airlines
Thu 12/45:44 pmABE - DEN
1 stop6h 10mAmerican Airlines
Deal found 8/14$221
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Thu 8/286:00 amDEN - ABE
2 stops14h 06mMultiple Airlines
Thu 9/118:00 amABE - DEN
Nonstop3h 45mMultiple Airlines
Deal found 8/14$222
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Thu 10/910:15 amDEN - ABE
Nonstop3h 27mMultiple Airlines
Sun 10/124:32 pmABE - DEN
1 stop24h 39mMultiple Airlines
Deal found 8/12$263
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Thu 9/2510:35 amDEN - ABE
Nonstop3h 30mMultiple Airlines
Sun 9/284:55 pmABE - DEN
1 stop17h 14mMultiple Airlines
Deal found 8/12$268

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Allentown 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 August 14, 2025.
Use the filters below to find and compare flights from Denver to Allentown that are best for you.

Fly from

Denver

Fly to

Allentown

Route

Depart

Return

Price

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 8/28

9:51 am-3:13 pm

Nonstop3h 22m

Allentown-Bethlehem

Thu 9/11

8:00 am-9:45 am

Nonstop3h 45m

$141

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 8/28

9:51 am-3:13 pm

Nonstop3h 22m

Allentown-Bethlehem

Sun 8/31

7:00 am-9:01 am

Nonstop4h 01m

$141

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sun 9/7

10:35 am-4:05 pm

Nonstop3h 30m

Allentown-Bethlehem

Sun 9/14

8:00 am-9:45 am

Nonstop3h 45m

$158

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 10/9

10:15 am-3:42 pm

Nonstop3h 27m

Allentown-Bethlehem

Sun 10/12

7:30 am-9:25 am

Nonstop3h 55m

$159

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 9/25

10:35 am-4:05 pm

Nonstop3h 30m

Allentown-Bethlehem

Sun 9/28

8:00 am-9:45 am

Nonstop3h 45m

$174

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sat 11/1

7:08 am-5:23 pm

1 stop8h 15m

Allentown-Bethlehem

Tue 11/4

4:30 pm-9:08 pm

1 stop6h 38m

$181

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Wed 12/3

8:41 am-4:21 pm

1 stop5h 40m

Allentown-Bethlehem

Thu 12/4

5:44 pm-9:54 pm

1 stop6h 10m

$221

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 8/28

6:00 am-10:06 pm

2 stops14h 06m

Allentown-Bethlehem

Thu 9/11

8:00 am-9:45 am

Nonstop3h 45m

$222

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 8/28

6:00 am-10:06 pm

2 stops14h 06m

Allentown-Bethlehem

Sun 8/31

7:00 am-9:01 am

Nonstop4h 01m

$222

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sun 8/31

9:51 am-3:13 pm

Nonstop3h 22m

$101

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
1
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Best time to book a flight from Denver to Allentown

Have a flexible travel schedule? Discover the best time to fly to Allentown from Denver 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 Denver to Allentown

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to Allentown. Price data was last updated on August 8, 2025.

The price you pay for your flight from Denver to Allentown may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from Denver to Allentown (average of $289). Flying from Denver to Allentown in December is currently the most expensive (average of $395). 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 DEN to ABE?

Find hourly flight availability from Denver to Allentown. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

One of the essential ways to save on airfare from Denver to Allentown is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 25% on airfare.

Reviews of airlines servicing Allentown

Get insights into the airlines that provide service to Allentown. 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 Allentown. Reviews last updated August 14, 2025.
Read through reviews of airlines operating flights from Denver to Allentown, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.2
Good
701 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,219 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

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

    Frontier, at $42, was found to be the cheapest airline from Denver to Allentown.Alternate airlines to your destination round-trip include Allegiant Air and American Airlines. Users have found that Frontier is 86% cheaper than the other options available to this destination.

  • What are the cheapest flights from Denver to Allentown?

    On average you can expect to pay $172 for a flight from Denver to Allentown. The cheapest flight overall is $53 while the most popular route, (Denver Intl - Allentown-Bethlehem) is currently priced at $159.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver to Allentown 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 Denver to Allentown?

    Currently, February is the cheapest month in which you can book a flight from Denver to Allentown (average of $289). Flying from Denver to Allentown in December is currently the most expensive (average of $395). 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

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Other flights to Allentown

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Top 5 airlines flying from Denver to Allentown

Discover the top 5 airlines that operate flights from Denver to Allentown. 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$42Average$235FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$74Average$212FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$162Average$384FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$468FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$448FlexibilityNo cancel feeOn-timeN/A

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