Cheap Flights from Denver to Allentown

Compare Denver 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 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 $1,390. Find the lowest prices on one-way and return tickets right here.

Allentown.$406 per passenger.Departing Fri, 29 May, returning Mon, 15 Jun.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Fri, 29 May, arriving in Allentown.Inbound direct flight with Allegiant Air departs from Allentown on Mon, 15 Jun, arriving in Denver International.Price includes taxes and charges.From $406, select.

Allentown.$417 per passenger.Departing Fri, 12 Jun, returning Mon, 29 Jun.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Fri, 12 Jun, arriving in Allentown.Inbound direct flight with Allegiant Air departs from Allentown on Mon, 29 Jun, arriving in Denver International.Price includes taxes and charges.From $417, select.

Allentown.$592 per passenger.Departing Mon, 22 Jun, returning Mon, 13 Jul.Return flight with Allegiant Air.Outbound direct flight with Allegiant Air departs from Denver International on Mon, 22 Jun, arriving in Allentown.Inbound direct flight with Allegiant Air departs from Allentown on Mon, 13 Jul, arriving in Denver International.Price includes taxes and charges.From $592, select.

Allentown.$723 per passenger.Departing Fri, 1 May, returning Tue, 5 May.Return flight with United.Outbound indirect flight with United, departs from Denver International on Fri, 1 May, arriving in Allentown.Inbound indirect flight with United, departs from Allentown on Tue, 5 May, arriving in Denver International.Price includes taxes and charges.From $723, select.

Allentown.$1,304 per passenger.Departing Mon, 9 Mar, returning Mon, 16 Mar.Return flight with United.Outbound indirect flight with United, departs from Denver International on Mon, 9 Mar, arriving in Allentown.Inbound indirect flight with United, departs from Allentown on Mon, 16 Mar, arriving in Denver International.Price includes taxes and charges.From $1,304, select.

Allentown.$1,390 per passenger.Departing Fri, 10 Apr, returning Sun, 12 Apr.Return flight with United.Outbound indirect flight with United, departs from Denver International on Fri, 10 Apr, arriving in Allentown.Inbound indirect flight with United, departs from Allentown on Sun, 12 Apr, arriving in Denver International.Price includes taxes and charges.From $1,390, select.

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.

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Direct flights from Denver to Allentown

Denver to Allentown: Alternative routes

Compare routes from Denver 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 found	$406
Cheapest month to fly	May
Average flight time	3 hrs, 29 mins
Most popular airline	Allegiant Air
Average flights per week	3

Finding cheap flights from Denver to Allentown: Frequently asked questions

How much are return flights from Denver to Allentown?

The best price we found for a return flight from Denver to Allentown is $406. 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.

How long does it take to fly from Denver to Allentown?

3 hours and 29 minutes is the average flight time from Denver to Allentown.

Which airlines fly direct from Denver to Allentown?

Allegiant Air flies direct from Denver to Allentown.

How many flights are there a week from Denver to Allentown?

As of March 2026, there are 3 flights per week flying from Denver to Allentown.

When is the cheapest time to fly from Denver to Allentown?

The cheapest month to fly from Denver to Allentown is usually May.

Which upcoming date is cheapest to fly from Denver to Allentown Airport on?

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.

Can I get a direct flight from Denver to Allentown Airport?

Yes – the average flight time is 3 hours and 29 minutes.

How can I find the best flight deal to Allentown?

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.

When is the best time to book flights to Allentown?

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.

Which is the cheapest airline to fly from Denver to Allentown with?

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)

If you have a late flight from Denver to Lehigh Valley International Airport, few things top the convenience of staying close to the terminal. Pick up your luggage at baggage claim and then be showered and resting soon after at one of these hotels near ABE:
Pick up a Lehigh Valley International Airport rental car and discover Allentown and beyond with your own wheels. Dollar, Hertz and Enterprise are top outlets to choose from here.
To lock in the lowest price, book your ride around three weeks in advance of your Denver to Lehigh Valley International Airport flight.
You'll find ABE at 3311 Airport Road.

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, $158 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 $406. 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 flight 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 flight ticket, consider the kind of weather you prefer. July is the warmest month in Allentown, with temperatures ranging from 15ºC to 30ºC.
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 and 7ºC.

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.