HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Allentown

$100+ Cheap flights from Denver to Allentown (DEN - ABE)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ABE
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Allentown with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Denver Intl to Allentown-Bethlehem are usually found in October or May, booked 8 days in advance, depart on a Monday or Wednesday and return on a Saturday

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 June 12, 2025.

Round-trip from

$100
(Booking.com)

Popular in

December

Cheapest in

October

Average price

$235

Good round-trip deal

$128 or less

Good one-way deal

$92 or less
From Denver Intl to Allentown-Bethlehem
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals
Price to beat on a round-trip flight from Denver Intl to Allentown-Bethlehem.
Search Deals
Price to beat on a one-way flight from Denver Intl to Allentown-Bethlehem.
Search Deals

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 June 12, 2025.

This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/219:51 amDEN - ABE
Nonstop3h 22mAllegiant Air
Sun 8/247:00 amABE - DEN
Nonstop4h 01mAllegiant Air
Deal found 6/10$100
This Delta deal was found by Cheapflights users on 6/11. 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.
Sat 8/237:05 amDEN - ABE
1 stop8h 29mDelta
Sat 8/306:14 pmABE - DEN
1 stop6h 41mDelta
Deal found 6/11$257
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:02 amDEN - ABE
1 stop8h 58mAmerican Airlines
Sun 8/176:15 amABE - DEN
1 stop8h 42mAmerican Airlines
Deal found 6/12$293
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/188:31 amDEN - ABE
3 stops35h 51mMultiple Airlines
Sun 7/207:00 amABE - DEN
Nonstop4h 01mMultiple Airlines
Deal found 6/10$401
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 7/41:25 pmDEN - ABE
1 stop6h 30mUnited Airlines
Tue 7/85:35 pmABE - DEN
1 stop7h 47mUnited Airlines
Deal found 6/11$499

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 June 12, 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 8/21

9:51 am-3:13 pm

Nonstop3h 22m

Allentown-Bethlehem

Sun 8/24

7:00 am-9:01 am

Nonstop4h 01m

$100

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sat 8/23

7:05 am-5:34 pm

1 stop8h 29m

Allentown-Bethlehem

Sat 8/30

6:14 pm-10:55 pm

1 stop6h 41m

$257

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Tue 8/12

7:02 am-6:00 pm

1 stop8h 58m

Allentown-Bethlehem

Sun 8/17

6:15 am-12:57 pm

1 stop8h 42m

$293

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Fri 7/18

8:31 am-10:22 pm

3 stops35h 51m

Allentown-Bethlehem

Sun 7/20

7:00 am-9:01 am

Nonstop4h 01m

$401

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Fri 7/4

1:25 pm-9:55 pm

1 stop6h 30m

Allentown-Bethlehem

Tue 7/8

5:35 pm-11:22 pm

1 stop7h 47m

$499

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 7/10

9:51 am-3:21 pm

Nonstop3h 30m

$144

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Tue 7/8

1:49 pm-12:27 am

1 stop8h 38m

$159

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Thu 7/10

6:00 am-10:00 pm

2 stops14h 00m

$236

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sat 7/12

12:15 pm-10:30 pm

1 stop8h 15m

$250

DenverAllentown

DEN - ABE

DENABE

Denver Intl

Sat 8/16

7:50 am-5:00 pm

1 stop7h 10m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 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 7 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 $292). 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 June 12, 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 35% on airfare.

Rainfall in Allentown by month

Plan your trip to Allentown by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Allentown ranges from 2.7 - 5.0 inches per month. July is typically the wettest month, when rainfall can reach 5.0 in. February is typically the driest time to visit Allentown when rainfall is around 2.7 in.

Temperature in Allentown by month

Plan your trip to Allentown by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Allentown, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

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 June 12, 2025.
See what other customers who have flown with Delta, United Airlines and Allegiant Air from Denver to Allentown have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
7.3
Good
725 reviews
Delta
8.0
Very good
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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
7,946 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

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?

    Allegiant Air, at $100, was found to be the cheapest airline from Denver to Allentown.Alternate airlines to your destination round-trip include Delta and American Airlines. Users have found that Allegiant Air is 67% cheaper than the other options available to this destination.

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

    One-way options have recently been found by users for as low as $144 on Allegiant Air. Other airlines that offer cheap prices include American Airlines from $159 and Delta from $250 one-way.

  • What are the cheapest flights from Denver to Allentown?

    On average you can expect to pay $177 for a flight from Denver to Allentown. The cheapest flight overall is $50 while the most popular route, (Denver Intl - Allentown-Bethlehem) is currently priced at $128.

  • 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 $292). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Other flights to Allentown

Explore flights to Allentown departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 12, 2025.
Orlando to Allentown flights
Sarasota to Allentown flights
Myrtle Beach to Allentown flights
Melbourne to Allentown flights
Fort Lauderdale to Allentown flights
St Petersburg to Allentown flights
Allentown to Nashville flights
Allentown to Denver flights
Allentown to Myrtle Beach flights
Allentown to Orlando Airport flights
Allentown to Punta Gorda flights
Allentown to Fort Lauderdale flights
Allentown to Orlando Sanford Intl Airport flights
Allentown to Tampa flights
Allentown to Sarasota flights
Allentown to Melbourne, Florida flights
Allentown to Nashville flights
Allentown to Myrtle Beach flights
Allentown to Fort Lauderdale flights
Allentown to Philadelphia flights
Allentown to Sarasota flights
Allentown to Orlando Airport flights
Allentown to Punta Gorda flights
Allentown to Tampa flights

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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$42Average$150FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$74Average$222FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$162Average$366FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$459FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$393FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.