$185 Find Cheap Flights from Allentown to Illinois - Compare and Save

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Cheap Flights from Allentown to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Chicago
2h 21mNonstop
from $349per person
Booking Insights

Price, demand and travel trends for Allentown to Illinois flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What are the cheapest fares from Allentown to Illinois recently?

The cheapest fare from Allentown to Illinois in the last week was $349 round-trip, to Chicago O'Hare Intl (ORD).

How do fares into airports in Illinois compare?

According to KAYAK data from the last 12 months, the cheapest airports to fly into Illinois from Allentown are:

• Chicago O'Hare Intl (ORD) (avg. price $367)
• Bloomington-Normal (BMI) (avg. price $583)

Are flights from Allentown to Illinois cheaper or more expensive than last year?

Fares from Allentown to Illinois are about 48% higher than they were in November last year, averaging $527 round-trip.

What's the cheapest month to fly from Allentown to Illinois?

July is typically the cheapest month to fly from Allentown to Illinois, with round-trip fares averaging $333. April and November are usually the most expensive, averaging $478 and $447, respectively.

How do fares from Allentown to Illinois vary by day of the week?

On average, Saturday is the cheapest day to fly from Allentown to Illinois and Monday is the most expensive. Looking at the past 12 months of KAYAK data, it's 66% more expensive to fly on a Monday compared to Saturday.

What's the best time of day to fly from Allentown to Illinois?

It's cheapest to fly to Illinois in the afternoon with average prices of $351. The morning is the most expensive time to fly, with average prices of $384.

What's the best time to book a flight from Allentown to Illinois?

Book your flights 20 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 44% compared to booking at the last minute (within 2 weeks of departure).

Key details for Allentown to Illinois flights

Low season

January

Cheapest flight

$185
Beat the crowds with an average 56% drop in travelers.
The most popular month to fly with an average 64% increase in travelers.
One-way flight from Allentown to Chicago O'Hare Intl Airport

Your Allentown to Illinois flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Allentown to Illinois?

    Fares from Allentown to Illinois are around their usual level right now. A round-trip under $302 is considered a good deal, so it's worth keeping an eye out, or setting a Price Alert to catch fare changes.

  • How much should I budget for a flight from Allentown to Illinois?

    Over the past 12 months, round-trip fares from Allentown to Illinois have typically cost between $302 and $492.

  • What are the main airports serving Illinois?

    Illinois has 17 airports. 100% of KAYAK users choose Chicago O'Hare Intl (ORD) as their arrival airport.

  • Which airlines fly nonstop from Allentown to Illinois?

    Based on the flight schedule for the next 3 months, 2 airlines offer nonstop flights on this route:

    • United Airlines
    • American Airlines

  • Which destinations in Illinois can I fly nonstop from Allentown?

    Based on the flight schedule for the next 3 months, you can fly nonstop from Allentown to just one destination in Illinois: Chicago.

  • Is it cheaper to fly with a layover from Allentown to Illinois?

    Yes, nonstop flights from Allentown to Illinois average $368 over the past 12 months. Flights with a layover can cost less, cheapest when connecting through Philadelphia (PHL), with average fares of $318.

  • How long is a flight from Allentown to Illinois?

    Nonstop flights from Allentown to Illinois take 2h 42m on average. All flights fly into Chicago O'Hare Intl (ORD).

  • Which cabin classes are available from Allentown to Illinois?

    On flights from Allentown to Illinois you can book Economy Class, Business Class or First Class.

  • What are some popular landmarks around Illinois?

    Illinois is home to many popular sights. KAYAK travelers' favorites include:

    • Magnificent Mile
    • Grant Park
    • Soldier Field
    • River North

  • What are the earliest and latest flights from Allentown to Illinois?

    The earliest nonstop flight from Allentown to Illinois departs at 5:30 am and the latest leaves at 6:22 pm. Nonstop flights take about 2h 42m.

Your guide to booking Allentown to Illinois flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 20 weeks before your trip. KAYAK data shows fares in this window are around 44% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • Flexible with your dates? Fly in July to save some money. It's typically the cheapest month on this route, while flights in April will cost you the most.
  • Fly out on a Saturday to get the cheapest fares. Avoid Monday flights, which are about 66% more expensive.
  • If you're watching your budget, fly into Chicago O'Hare Intl (ORD) which has the lowest average airfare in the region. Just remember to budget for any onward travel by bus, car or domestic flight.
  • Start your trip in Chicago, the most popular destination in Illinois. From there, it's easy to continue on to other popular spots such as Rosemont, Schaumburg and Champaign.
  • Whether you're trying to save time or money, Chicago O'Hare Intl (ORD) is usually your best option from Allentown.

Reviews of the top 3 airlines serving from Allentown to Illinois

 
Need help choosing which airline to fly with from Allentown to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8719 reviews
7.8Comfort
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

Requested an aisle seat at the gate and got it. The staff so friendly

10.0 ExcellentMark, Oct 2026
Read more Delta reviews

Requested an aisle seat at the gate and got it. The staff so friendly

Flight was very delayed so I was able to get on an earlier flight via stand-by. Crew communicated effectively around delay and worked to make customers comfortable. Wifi was ok, streaming TV was great. App functionality broke down once I was moved to stand-by on earlier flight.

Sat in the tarmac at O’Hare for 65 minutes. This is a regular occurrence for delta at O’Hare

Delta was fine though my flight was delayed 4 hours into LGA and my return into ORD involved a taxi of 1+ hour to the gate

It was as good as it could be. Flying is not a pleasant experience these days.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

Got on the plane and sat there for an hour before departure.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

We left nearly 3 hours late...so that was not a good experience. We boarded and then ended up about 1 hour stuck at the gate. Not a good experience.

Just sat on the run way after we arrived early

Stored my cloth purse under seat in front off me as instructed. When I retrieved it, half of it was soaked, along with everything inside it. I don’t really know how that could have been prevented because the area did not look wet, but I was not happy about it.

It was easy to board, and the staff was friendly and helpful. What could have been better is that I shouldn't have to pay extra for a seat that doesn't recline.

Was on the plane sitting longer than the actual flight in air was, boarded at 5:45p and didn't take off until 6:50p flight was only about 30 minutes long. Just was poor experience will booking more with American Airlines.

Like the fact that the boarding was expedited. But the delay and chaos around the onboarding was not appreciated.

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

All good. Easy check in and boarding. Lovely flight crew

Boarding and Delays The boarding process for my American Airlines flight from Copenhagen to Philadelphia was a bit tricky. We experienced a gate change that required a long walk to a new area of the airport. Additionally, boarding was not via a jet bridge; we had to take a shuttle bus to the plane and then carry our luggage up the stairs ourselves. Furthermore, the bag drop didn't open until about 12:20 PM, which was only three hours before our scheduled departure. This meant I couldn't drop my bag off early and had to wait outside of security in order to drop off my bag and use the kiosk. The bag drop self-service kiosks also didn't open until about 12:00 PM when an American Airlines employee unlocked them so that we could print out our boarding passes and bag tags, which further created a backlog. The flight was delayed by over an hour because we had to wait for one of the tires on the plane to be changed. Flight Attendant Professionalism On a positive note, the flight attendant was very professional when handling a passenger who was sitting in the wrong seat. Even though the passenger was persistent and reluctant to move, the flight attendant calmly ensured the assigned passenger could take their seat. Kudos to the flight attendant for keeping his calm and composure, not allowing the issue to escalate, and handling it well under pressure while a line of passengers waited in the aisle to board. In-Flight Service The in-flight service was also fast, prompt, and efficient, although service had to be suspended for the last two hours of the flight due to weather and turbulence, which was outside of the crew's control. Limited Flight Options Please note that American Airlines only operates one flight per day in and out of Copenhagen. This means there are limited options available if your flight is delayed or canceled, which is something to take into consideration when booking.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

Excellent - explanations were clear staff was nice and flight was comfortable

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

The airline schedule services was simply mediocre. The ground crew is fine; they are doing their best. The after-delay services were simply poor, and after-cancelling services were almost non-existence. Receiving refund is one rescuing point, but please keep in mind that, people wants to get home or get to their destinations. Cancelling without aftermath recourse is simply poor services. AA needs to fire the marketing department, and the customer-service related leaders.

Our 9:10 am scheduled flight continued to get delayed all day with no information given from the agents as to why. It wasn’t until I went to the customer service desk and got us switched to another flight at 2:44 pm (that wasn’t nonstop like our booked flight) that the agent finally was able to find out it was due to a fuel leak. I don’t know if our original flight ever took off but I don’t find it acceptable to leave people sitting in an airport all day with no explanation.

This flight was awful all around. Delays on the tarmac at PHL before takeoff and at the tarmac in Chicago caused me to miss my final connection. This was completely avoidable, in my opinion.

Great flight. Quick boarding and departure. No problems. Flight crew were very friendly and professional.

This flight was a horror. Every seat was filled, many of them by passengers coughing and sniffling (including one immediately to my left and another across the aisle to my right). The CO2 level in the cabin peaked at an outrageous 2,847 ppm during boarding and never fell below 1,500 ppm for the entire flight. I wore a mask over another mask and can only hope that that, plus the plane's filtration system, was enough to keep me from getting sick along with every other passenger on that plane. The recording says safety is American's highest priority, but refusing to mandate masks on board when COVID-19 is still a threat shows that the airline's actual attitude toward passenger and crew safety is one of depraved indifference.

More options for your flight from Allentown to Illinois

Complete your trip to Illinois with a hotel stay or car rental