$102 Cheap United flights Denver (DEN) to Allentown (ABE)

Make use of the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines round-trip flights from $279 from DEN to ABE. Affordable one-way options from $102 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the most affordable months to travel to Allentown with United Airlines. You could also find fantastic deals on one-way and return tickets in March.

Begin your search one to three months ahead of your departure date to find cheap fares on United Airlines flights from Denver Intl. Airport (DEN) to Lehigh Valley Intl. Airport (ABE). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Use our “Nonstop” filter when searching for direct United Airlines flights from DEN to ABE. It’s also an easy way to compare other carriers servicing the same nonstop trip.

To find the earliest departures from DEN to ABE with United Airlines, filter your search by “Morning” and “Early Morning.” Booking an early flight generally means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Lehigh Valley Intl. Airport (ABE) is the primary Allentown gateway for United Airlines flights from Denver Intl. Airport (DEN).

A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to depart from DEN to ABE with United Airlines. Plus, by joining Expedia’s free One Key™ program, you can receive OneKeyCash™* in addition to United Airlines’s loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee may apply if you cancel or reschedule your booking more than 24 hours after confirmation. To find plane tickets with more flexibility, select our “No cancel fee” or “Changes included” filter while searching for flights. For more information on canceling or changing your reservation, go to “Trips,” select your flight and tick “Manage Booking.”