$129 Cheap Delta flights Denver (DEN) to Allentown (ABE)

Set the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines return flights from $222 from DEN to ABE. Affordable one-way options from $129 are available as well.**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 fly to Allentown with Delta Air Lines. You could also find great deals on one-way and round-trip fares in March.

Search for affordable Delta Air Lines flights from Denver Intl. Airport (DEN) to Lehigh Valley Intl. Airport (ABE) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the ideal day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 the “Nonstop” filter when searching for direct Delta Air Lines flights from DEN to ABE. You’ll also be able to compare other airlines offering the same nonstop journey.

To find the earliest departure from DEN to ABE with Delta Air Lines, filter your results by “Early Morning” and “Morning.” Booking an early flight usually means cancellations are less likely.**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 main Allentown hub for Delta Air Lines flights from Denver Intl. Airport (DEN).

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is the leading choice for many travelers heading from DEN to ABE. Also, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee typically applies if you cancel or reschedule your booking more than 24 hours after it’s confirmed. To secure flexible plane tickets, select our “Changes included” or “No cancel fee” filter when you look for flights. For more details on canceling or modifying your reservation, go to “Trips,” select your flight and tick “Manage Booking.”