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$124+ Cheap flights from Harrisburg (MDT) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Harrisburg to Illinois

Cheapest flights from Harrisburg to Illinois
Explore the most affordable flight options available from Harrisburg to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:02 pmMDT - STL
1 stop19h 36mFrontier
Sun 11/95:12 pmSTL - MDT
1 stop26h 00mFrontier
Deal found 10/28$203
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:02 pmMDT - STL
1 stop19h 36mFrontier
Mon 11/310:25 amSTL - MDT
1 stop8h 47mFrontier
Deal found 10/28$237
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:00 pmMDT - ORD
Nonstop2h 19mAmerican Airlines
Tue 12/306:40 amORD - MDT
1 stop5h 37mAmerican Airlines
Deal found 10/30$239
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/206:15 amMDT - ORD
1 stop4h 23mUnited Airlines
Sat 12/271:30 pmORD - MDT
Nonstop2h 03mUnited Airlines
Deal found 10/29$244
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:00 amMDT - ORD
Nonstop2h 20mAmerican Airlines
Sat 12/278:15 amORD - MDT
Nonstop2h 02mAmerican Airlines
Deal found 10/30$245
This United Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:15 amMDT - ORD
1 stop4h 31mUnited Airlines
Sun 11/238:50 amORD - MDT
1 stop4h 08mUnited Airlines
Deal found 10/29$247
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:12 pmMDT - ORD
1 stop5h 50mDelta
Mon 11/248:55 amORD - MDT
1 stop6h 20mDelta
Deal found 10/29$249
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:00 amMDT - MDW
1 stop4h 53mDelta
Sat 11/226:48 pmMDW - MDT
1 stop3h 26mDelta
Deal found 10/28$249
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/185:00 amMDT - STL
1 stop4h 35mAmerican Airlines
Sun 12/216:35 pmSTL - MDT
1 stop4h 44mAmerican Airlines
Deal found 10/30$249
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:15 amMDT - ORD
1 stop4h 21mUnited Airlines
Wed 12/108:45 amORD - MDT
1 stop4h 07mUnited Airlines
Deal found 10/30$250
This American Airlines deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:10 pmMDT - ORD
Nonstop2h 20mAmerican Airlines
Sat 12/64:05 pmORD - MDT
1 stop4h 42mAmerican Airlines
Deal found 10/29$255
This American Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:10 pmMDT - ORD
Nonstop2h 20mAmerican Airlines
Mon 11/248:37 pmORD - MDT
Nonstop2h 01mAmerican Airlines
Deal found 10/30$259

Cheap flight deals from Harrisburg to Illinois

Keep the following information in mind while searching for Harrisburg to Illinois flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$239
(American Airlines)

One-way from

$124
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$345
Provider with most accurate pricing for Harrisburg-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harrisburg-Chicago (CHI) flights.
Search Deals
From Harrisburg to Illinois
Search Deals
One-way flight from Harrisburg to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Harrisburg to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Harrisburg to Illinois that are best for you.

Fly from

Harrisburg

Fly to

Illinois

Route

Depart

Return

Price

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Sun 11/16

6:30 am-7:44 am

Nonstop2h 14m

Chicago O'Hare Intl

Sun 11/23

8:50 am-1:58 pm

1 stop4h 08m

$239

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Sat 12/6

6:01 am-7:20 am

Nonstop2h 19m

Chicago O'Hare Intl

Sun 12/7

4:05 pm-12:18 am

1 stop7h 13m

$239

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Tue 12/23

6:30 am-7:50 am

Nonstop2h 20m

Chicago O'Hare Intl

Fri 12/26

8:51 am-1:54 pm

1 stop4h 03m

$239

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Sun 11/23

6:07 am-7:28 am

Nonstop2h 21m

Chicago O'Hare Intl

Sat 11/29

5:00 am-10:24 am

1 stop4h 24m

$239

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 11/21

6:15 am-9:46 am

1 stop4h 31m

Chicago O'Hare Intl

Sun 11/23

8:50 am-1:58 pm

1 stop4h 08m

$247

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 11/21

7:12 pm-12:02 am

1 stop5h 50m

Chicago O'Hare Intl

Mon 11/24

6:45 am-11:55 am

1 stop4h 10m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 12/18

8:53 pm-7:42 pm

1 stop23h 49m

Lambert-St Louis

Mon 12/22

4:27 pm-8:50 am

1 stop15h 23m

$249

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Sat 11/15

6:00 am-9:53 am

1 stop4h 53m

Chicago Midway

Sat 11/22

6:48 pm-11:14 pm

1 stop3h 26m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Wed 11/12

6:00 am-10:43 am

1 stop5h 43m

Lambert-St Louis

Mon 11/17

5:17 pm-11:11 pm

1 stop4h 54m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 12/18

5:00 am-8:35 am

1 stop4h 35m

Lambert-St Louis

Sun 12/21

6:35 pm-12:19 am

1 stop4h 44m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
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Best time to book a flight from Harrisburg to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Harrisburg with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Harrisburg to Illinois

What is the cheapest month to book a flight from Harrisburg to Illinois?

Currently, March is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $50). Flying from Harrisburg to Illinois in June is currently the most expensive (average of $132). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MDT to IL?

Find hourly flight availability from Harrisburg to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s typically best to fly out from Harrisburg to Illinois in the evening. Doing so could potentially save you 66% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Harrisburg to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Harrisburg to Illinois. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Harrisburg to Illinois flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Harrisburg to Illinois?

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated October 30, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Harrisburg to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Harrisburg to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Harrisburg to Illinois?

    Harrisburg (MDT), located 8.5 mi from the city center, is the airport you fly out of when you book flights from Harrisburg to Illinois.

  • How long is the flight from Harrisburg to Illinois?

    For as low as $239, United Airlines can have you in Illinois from Harrisburg in 2h 14m. Airlines will cover a distance of 592 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Harrisburg to Illinois one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $214. Users have also found prices from $234 and $237 on Allegiant Air and American Airlines, respectively.

  • What are the most popular routes from Harrisburg to Illinois?

    When deciding which route to take from Harrisburg to Illinois consider Harrisburg - Chicago O'Hare Intl, Harrisburg - Chicago Midway or Harrisburg - Lambert-St Louis as they are the most popular.

  • What are the most reliable airlines from Harrisburg to Illinois?

    Before booking your flight to Illinois from Harrisburg, check out the most reliable airlines to get you to your destination on time: Japan Airlines (87%), Qatar Airways (86%), Alaska Airlines( 83%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $578, our data shows the cheapest flight currently is $178. When looking at the most popular route, (Harrisburg - Chicago O'Hare Intl), you can expect to pay $209 for that flight.

  • Can I find deals for flights from Harrisburg to Illinois that include hotel bookings?

    Yes. In addition to deals on Harrisburg to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harrisburg to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harrisburg to Illinois.

  • Can I find deals for business class flights from Harrisburg to Illinois?

    Yes. Cheapflights offers flight deals from Harrisburg to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Harrisburg to Illinois?

    Currently, March is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $50). Flying from Harrisburg to Illinois in June is currently the most expensive (average of $132). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Harrisburg to Illinois

Discover the top 3 airlines that operate flights from Harrisburg to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$119Average$367FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$207Average$345FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$209Average$361FlexibilityNo cancel feeOn-time69%

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