Cheap flights from Allentown to Denver from $150

The cheapest month to fly to Denver from Allentown is in August. Flight prices, which tend to average around $216, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in August, then you should wait until September to fly from Allentown, when ticket prices are also cheap, with an average price of $223.

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $226. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Friday, with ticket prices averaging around $279.

The cheapest time of day to fly to Denver is at noon when flights can be purchased for as low as $250. Flights in the morning are often more expensive with an average ticket price of $270.

Fly from Allentown-Bethlehem to Denver Intl for the best Allentown-Bethlehem - Denver Intl flight prices

You are more likely to see cheaper flights to Denver from Allentown when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $345 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from Allentown for as low as $254 on momondo.

There is only 1 cabin class available to choose from on Allentown to Denver flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between Allentown to Denver.

As of November 2026, prices for Allentown to Denver flights are approximately 5% cheaper when compared to flights at the same time last year.

American Airlines and Delta are the most popular carriers operating from Allentown-Bethlehem to Denver Intl

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Denver from Allentown according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 7 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Philadelphia (PHL) offer the lowest average round-trip price of $240.

Flights connecting via Philadelphia (PHL) have the shortest average one-way travel time: 7h 22m.

Philadelphia (PHL) has the shortest average layover time for this route: 1h 04m.