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Cheap Flights from Denver International to Allentown

Compare Denver International to Allentown flight deals

Find the cheapest month or even day of the year to fly to Allentown

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Flight deals from Denver International to Allentown

Looking for a cheap last-minute deal or the best return flight from Denver International to Allentown? Find the lowest prices on one-way and return tickets right here.
Allentown.R 938 per passenger.Departing Thu, 4 Sep.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Thu, 4 Sep, arriving in Allentown.Price includes taxes and charges.From R 938, select.
Allentown.R 938 per passenger.Departing Thu, 2 Oct.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Thu, 2 Oct, arriving in Allentown.Price includes taxes and charges.From R 938, select.
Allentown.R 940 per passenger.Departing Thu, 14 Aug.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Thu, 14 Aug, arriving in Allentown.Price includes taxes and charges.From R 940, select.
Allentown.R 2,347 per passenger.Departing Thu, 31 Jul.One-way flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Thu, 31 Jul, arriving in Allentown.Price includes taxes and charges.From R 2,347, select.

Find the cheapest month to fly from Denver International to Allentown

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver International to Allentown flights are currently cheapest in September.
Jul
from R 2,347
Aug
from R 940
Sep
from R 938
Oct
from R 938
Nov
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Dec
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Jan
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Direct flights from Denver International to Allentown

Denver International to Allentown: Alternative routes

Compare routes from Denver International to Allentown below. You may find an airport to fly into that's cheaper, faster, or easier than Allentown.

Denver to Allentown: Flight information

The things to know before you go.
Cheapest flight foundR 938
Cheapest month to flyOctober
Average flight time3 hrs, 28 mins
Most popular airlineAllegiant Air
Average flights per week2

Finding cheap flights from Denver International to Allentown: Frequently asked questions

The best price we found for a return flight from Denver International to Allentown is R 1,875. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 28 minutes is the average flight time from Denver International to Allentown.
Allegiant Air flies direct from Denver International to Allentown.
As of July 2025, there are 2 flights per week flying from Denver International to Allentown.
The cheapest month to fly from Denver International to Allentown is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Allentown Airport on Thursday, 2 October 2025.
Yes – the average flight time is 3 hours and 28 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Allentown but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Allentown is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Allegiant Air offers the cheapest flight tickets to Allentown.

Travelling from Denver International Airport (DEN) to Lehigh Valley International Airport (ABE): what you need to know

  • Around 3 hours 30 minutes is how long you can expect to be in the air on a direct flight from Denver International Airport to Lehigh Valley International Airport.

  • Give yourself enough time to make your DEN to ABE flight. It's generally best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak month such as July? School holidays and other popular periods can lead to longer queues at airport checkpoints. Be extra cautious and arrive up to four hours before international flights and two hours before a domestic departure.

  • Allegiant Air is your ticket to exploring Allentown (and perhaps some other exciting corners of United States!). Check out the direct flights from Denver International Airport to Lehigh Valley International Airport offered by this popular carrier.

  • The airline that serves the most passengers on this route is Allegiant Air.

  • Consider adding a stopover when booking your ticket from Denver International Airport to Lehigh Valley International Airport. Just deselect 'Direct flights only' to break up your trip, or perhaps see a new city along the way. Here are some options between DEN and ABE:

    • Nashville International Airport

    • Hartsfield-Jackson Atlanta International Airport

    • Myrtle Beach International Airport

How to find the cheapest flights from Denver International Airport (DEN) to Lehigh Valley International Airport (ABE)

  • The cheapest price we've found for a one-way Denver International Airport to Lehigh Valley International Airport flight is R 937. A return plane ticket is currently R 1,875. Depending on the availability and when you book, these fares may change.

  • To score cheap tickets from DEN to ABE, book your trip ten months before your departure date.

  • September is the cheapest month for flights from Denver International Airport to Lehigh Valley International Airport. If you need to fly during a different time of year, the 'Whole month' tool will show you the lowest prices for each month.

  • Getting your hands on cheap flights from DEN to ABE is a cinch with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch as soon as a lower fare pops up.

  • Pick your ideal arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Denver International Airport to Lehigh Valley International Airport.

Handy information about Denver International Airport (DEN)

  • You'll find DEN at 8500 Pena Boulevard.

  • Denver International Airport earns top marks for on-time performance. 80.23% of flights that take off from DEN reach their destination on time.

  • To get to Denver International Airport from central Denver, it takes around 35 minutes if you're planning to drive. This depends on traffic, however. It's approximately 40 kilometres from the airport to the city centre.

  • The trip on public transport usually takes 1 hour 30 minutes.

  • Get your flight from Denver International Airport to Lehigh Valley International Airport off to a stress-free start. Just a short drive from DEN, spend the night in Baymont by Wyndham Denver International Airport and you'll be well-rested for the trip ahead.

Arriving at Lehigh Valley International Airport (ABE)

Getting from Lehigh Valley International Airport (ABE) to central Allentown

  • You'll find ABE at 3311 Airport Road.

  • From Lehigh Valley International Airport, Allentown is approximately 8 kilometres away. It takes around 10 minutes to reach the centre by car.

  • When travelling by public transport, expect a journey time of around 30 minutes.

When to fly to Lehigh Valley International Airport (ABE)

  • The quietest month for a flight from Denver International Airport to Lehigh Valley International Airport is April, while July is the most popular. Pick the best time to visit Allentown based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • The warmest month in Allentown is July, with the temperature ranging between 15ºC (59ºF) and 30ºC (86ºF). Book your flights from Denver International Airport to Lehigh Valley International Airport in this month if you enjoy this type of weather.

  • Search for cheap tickets from DEN to ABE in January if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -9ºC (16ºF) and 7ºC (45ºF) on average.

Explore more of United States

  • You've done Allentown, now it's time to explore other corners of United States. Travel around 121 kilometres east to New York to tick off its must-visit sights. From Statue of Liberty to Central Park and Empire State Building, you'll have a full itinerary ahead.

  • If you're eager to discover another well-known destination in United States, head for Philadelphia, roughly 80 kilometres south of Allentown. Liberty Bell, Independence Hall and Philadelphia Museum of Art are among the biggest draws.

Plan the rest of your trip from Denver to Allentown

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.