Cheap flight tickets from Denver to Allentown

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

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Flight deals from Denver to Allentown Airport

Looking for a cheap last-minute deal or the best return flight from Denver to Allentown Airport? If you want to travel next month, return fares start from RM3,220. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Allentown

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to Allentown flights are currently cheapest in June.

Direct flights from Denver to Allentown

Denver to Allentown: Flight information

The things to know before you go.
Cheapest flight foundRM939
Cheapest month to flyMay
Average flight time3 hrs, 29 mins
Most popular airlineAllegiant Air
Average flights per week3

Finding cheap flights from Denver to Allentown: Frequently asked questions

The best price we found for a return flight from Denver to Allentown is RM939. 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 29 minutes is the average flight time from Denver to Allentown.
Allegiant Air flies direct from Denver to Allentown.
As of March 2026, there are 3 flights per week flying from Denver to Allentown.
The cheapest month to fly from Denver to Allentown is usually May.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Allentown Airport on Friday, 29 May 2026.
Yes – the average flight time is 3 hours and 29 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.
The cheapest airline that flies to Allentown is Allegiant Air .

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

  • Denver's main airport is Denver International Airport (DEN). Explore your departure options from this base when booking your flights from Denver to Lehigh Valley International Airport (ABE).

  • Expect to be travelling for 3 hours 30 minutes. On average, that's the time it takes for a direct Denver to Lehigh Valley International Airport flight.

  • Lehigh Valley International Airport is located in Allentown. The city follows the UTC-4 timezone and is two hours ahead of Denver.

  • Get to the airport on time so you don't miss your flight from Denver to ABE. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid any last-minute rush.

  • In peak travel periods, allow for extended wait times and arrive earlier. Aim for at least two hours ahead for domestic flights and as much as four hours for international trips.

Airports in Denver

Denver International Airport (DEN)

  • You can take a direct flight from Denver to Lehigh Valley International Airport (ABE) departing from Denver International Airport (DEN).

  • When jetting out of DEN, you can take a direct flight from Denver to Lehigh Valley International Airport with Allegiant Air.

  • The majority of passengers prefer to fly with Allegiant Air between DEN and ABE.

  • Travelling from central Denver to DEN takes about 1 hour 30 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 40 kilometres in 35 minutes or so, depending on traffic conditions.

  • Get your flight from Denver to Lehigh Valley International Airport off to a hassle-free start. Only a quick drive from Denver International Airport, stay at Baymont by Wyndham Denver International Airport and be well-rested for the journey ahead.

  • 80.23% of flights leaving Denver International Airport land at their destination as planned. With its solid on-time performance, you're unlikely to experience delays when setting off from DEN.

  • You'll find DEN at 8500 Pena Boulevard.

About Lehigh Valley International Airport (ABE)

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

  • The centre of Allentown is around 6 kilometres from Lehigh Valley International Airport. Journey times by car hire or cab will vary depending on traffic conditions, so do a little research ahead of time.

  • It'll take around 30 minutes if you're travelling on public transport.

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

  • Right now, RM367 is the best price we've found for a one-way ticket from Denver to Lehigh Valley International Airport. The cheapest price for a return flight is RM939. Remember fares can change due to availability at the time of booking.

  • Book four months before travelling. Research into pricing trends suggests this is the ideal window for finding cheap flights from Denver to ABE.

  • The best month for scoring cheap Denver to Lehigh Valley International Airport tickets is September. Use the 'Whole month' tool to compare flight prices, then choose the dates that offer the biggest savings.

  • You don't need to check every day to find out if fares have dropped when you set up a Price Alert. We'll let you know when a better deal comes up on plane tickets from Denver to ABE.

  • Filters make it easier to find a bargain for your flight from Denver to Lehigh Valley International Airport. Choose the flight times, carriers and stops that match your plans. Then sort the results by 'Cheapest' to find the best price quickly.

The best time to fly from Denver to Lehigh Valley International Airport (ABE)

  • It's time to figure out your travel dates for your flight from Denver to Lehigh Valley International Airport (ABE). July is the busiest month to visit Allentown. If you like things a bit more low-key, go in April.

  • When booking your Denver to ABE plane ticket, consider the kind of weather you prefer. July is the warmest month in Allentown, with temperatures ranging from 15ºC (59ºF) to 30ºC (86ºF).

  • If you want to travel in cooler conditions, look for a cheap ticket from Denver to Lehigh Valley International Airport in January when temperatures are between -9ºC (16ºF) and 7ºC (45ºF).

More about Allentown

  • Start your Allentown trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from Denver to Lehigh Valley International Airport, browse our range of accommodation options including:

  • There are so many things to explore in this city, it can be tricky to know where to start. Allentown Art Museum, Lehigh Riverwalk and Allentown Passenger Station Historic Site - Lehigh Valley Railroad are popular attractions which should feature on any good Allentown itinerary.

Explore more of the United States

  • You've seen Allentown, now it's time to discover more of the United States. Journey around 121 kilometres east to New York to tick off its must-visit sights. From Central Park to Manhattan Skyline and Statue of Liberty, you've got a jam-packed schedule ahead.

  • Around 177 kilometres south-west of Allentown, Baltimore is another essential stop in the United States. No visit is complete without checking out Baltimore Aquarium, National Aquarium and Washington Monument and Mount Vernon Place.

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