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$83+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — DEN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 Thursday or Saturday and return on a Monday

Cheap 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 September 11, 2025.

Round-trip from

$176
(FlightHub)

One-way from

$83
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$207

Good round-trip deal

$145 or less

Good one-way deal

$83 or less
From Allentown-Bethlehem to Denver Intl
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One-way flight from Allentown-Bethlehem to Denver Intl
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Highest demand for flights based on searches. 23% potential increase in price ($101 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Allentown-Bethlehem to Denver Intl.
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Price to beat on a one-way flight from Allentown-Bethlehem to Denver Intl.
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Find 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 September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/218:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Sun 9/2810:35 amDEN - ABE
Nonstop3h 30mAllegiant Air
Deal found 9/10$176
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Sun 9/2810:35 amDEN - ABE
Nonstop3h 30mAllegiant Air
Deal found 9/10$177
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:53 pmABE - DEN
1 stop7h 16mAmerican Airlines
Sat 10/181:52 pmDEN - ABE
1 stop6h 48mAmerican Airlines
Deal found 9/11$179
This FlightHub deal was found by Cheapflights users on 9/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:30 amABE - DEN
Nonstop3h 55mAllegiant Air
Sun 10/510:15 amDEN - ABE
Nonstop3h 27mAllegiant Air
Deal found 9/9$193
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/237:30 amABE - DEN
Nonstop3h 55mMultiple Airlines
Mon 10/278:00 amDEN - ABE
1 stop23h 26mMultiple Airlines
Deal found 9/10$204
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/148:00 amABE - DEN
Nonstop3h 45mAllegiant Air
Thu 9/1810:35 amDEN - ABE
Nonstop3h 30mAllegiant Air
Deal found 9/10$212
This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:30 pmABE - DEN
1 stop8h 39mAmerican Airlines
Tue 11/116:23 amDEN - ABE
1 stop7h 28mAmerican Airlines
Deal found 9/11$214
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:53 pmABE - DEN
1 stop7h 16mAmerican Airlines
Wed 10/291:24 pmDEN - ABE
1 stop6h 16mAmerican Airlines
Deal found 9/10$219
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:30 amABE - DEN
Nonstop3h 55mAllegiant Air
Thu 10/1610:15 amDEN - ABE
Nonstop3h 27mAllegiant Air
Deal found 9/10$225

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 September 11, 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

Thu 10/2

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Sun 10/5

10:15 am-3:42 pm

Nonstop3h 27m

$193

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Sun 10/12

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Thu 10/16

10:15 am-3:42 pm

Nonstop3h 27m

$225

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 10/23

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Sun 10/26

12:25 am-8:12 pm

1 stop17h 47m

$257

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Sat 11/8

5:10 pm-11:20 pm

1 stop8h 10m

Denver Intl

Tue 11/11

6:23 am-3:51 pm

1 stop7h 28m

$269

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 10/23

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Wed 10/29

9:18 pm-2:17 pm

3 stops38h 59m

$271

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 10/2

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Thu 10/9

6:00 am-10:15 pm

3 stops14h 15m

$288

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Fri 2/20

5:40 pm-10:05 pm

1 stop6h 25m

Denver Intl

Mon 2/23

4:50 pm-12:16 am

1 stop5h 26m

$289

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 9/25

8:00 am-9:45 am

Nonstop3h 45m

Denver Intl

Tue 9/30

10:55 pm-10:15 pm

3 stops45h 20m

$292

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 10/2

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Wed 10/8

8:21 pm-11:24 am

1 stop13h 03m

$327

AllentownDenver

ABE - DEN

ABEDEN

Allentown-Bethlehem

Thu 10/9

7:30 am-9:25 am

Nonstop3h 55m

Denver Intl

Thu 10/16

10:15 am-3:42 pm

Nonstop3h 27m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 18 results
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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 August 29, 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, October is the cheapest month in which you can book a flight from Allentown to Denver (average of $197). Flying from Allentown to Denver in March is currently the most expensive (average of $278). 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 September 11, 2025.

It’s typically best to fly out from Allentown to Denver in the morning. Doing so could potentially save you 50% on the flight price compared to flying at noon, 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 September 7, 2025.

Travelers seeking maximum savings on their Allentown to Denver flight should consider departing on Friday evenings when fares are most often at their lowest. Monday afternoons 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 September 11, 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
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
702 reviews
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

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 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 1 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 3h 55m. Allegiant Air provides one of the quickest options available for as low as $193. The distance between Allentown and Denver is about 1534 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Frontier, at $44, was found to be the cheapest airline from Allentown to Denver.Alternate airlines to your destination round-trip include Allegiant Air and United Airlines. Frontier is priced at 86% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Allentown to Denver?

    While on average a flight from Allentown to Denver is generally $129, our data shows the cheapest flight currently is $53. When looking at the most popular route, (Allentown-Bethlehem - Denver Intl), you can expect to pay $177 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, October is the cheapest month in which you can book a flight from Allentown to Denver (average of $197). Flying from Allentown to Denver in March is currently the most expensive (average of $278). 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
Westminster
Black Hawk
Golden
Winter Park
Broomfield
Greeley
Lone Tree
Lakewood
Cripple Creek
Thornton
Silverthorne
Frisco
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$44Average$160FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$118Average$219FlexibilityNo cancel feeOn-time88%
United AirlinesCheapest$213Average$455FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$217Average$359FlexibilityNo cancel feeOn-time71%
DeltaCheapest$272Average$397FlexibilityNo cancel feeOn-timeN/A

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