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$116+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$240
(Mytrip)

One-way from

$135
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$377
Provider with most accurate pricing for Harrisburg-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Harrisburg-Chicago (CHI) flights.
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From Harrisburg to Illinois
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One-way flight from Harrisburg to Illinois
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Highest demand for flights based on searches. 9% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 1, 2025.

This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/284:00 pmMDT - EVV
1 stop22h 23mAllegiant Air
Sun 6/18:20 amEVV - MDT
1 stop27h 03mAllegiant Air
Deal found 4/30$240
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 5/267:41 amMDT - ORD
Nonstop2h 21mAmerican Airlines
Tue 6/38:25 amORD - MDT
Nonstop1h 56mAmerican Airlines
Deal found 4/30$245
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/239:29 pmMDT - ORD
2 stops23h 34mMultiple Airlines
Mon 5/267:47 amORD - MDT
1 stop23h 48mMultiple Airlines
Deal found 4/29$249
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/86:00 amMDT - MDW
2 stops7h 29mDelta
Sat 7/121:09 pmMDW - MDT
2 stops9h 43mDelta
Deal found 4/30$249
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Wed 11/126:00 amMDT - STL
1 stop8h 04mAmerican Airlines
Mon 11/171:45 pmSTL - MDT
1 stop5h 16mAmerican Airlines
Deal found 4/30$249
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/46:10 amMDT - STL
1 stop4h 27mDelta
Sun 7/66:40 amSTL - MDT
1 stop4h 14mDelta
Deal found 4/30$263
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Fri 11/76:10 amMDT - ORD
Nonstop2h 02mUnited Airlines
Sun 11/96:20 pmORD - MDT
Nonstop2h 00mUnited Airlines
Deal found 4/30$265
This Delta deal was found by Cheapflights users on 5/1. 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 6/276:10 amMDT - ORD
1 stop4h 53mDelta
Mon 6/305:05 pmORD - MDT
1 stop4h 55mDelta
Deal found 5/1$269
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/295:37 amMDT - PIA
1 stop6h 27mAmerican Airlines
Sun 6/15:05 pmPIA - MDT
1 stop4h 19mAmerican Airlines
Deal found 4/30$269
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1911:23 amMDT - MDW
1 stop9h 59mFrontier
Sat 7/269:12 pmMDW - MDT
1 stop11h 56mFrontier
Deal found 4/29$292
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/286:15 amMDT - STL
1 stop4h 41mUnited Airlines
Wed 6/45:00 amSTL - MDT
1 stop4h 14mUnited Airlines
Deal found 4/30$303
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/29:11 amMDT - MDW
2 stops9h 59mAllegiant Air
Fri 6/62:53 pmMDW - MDT
2 stops21h 17mAllegiant Air
Deal found 4/30$346

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 May 1, 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

HarrisburgEvansville

MDT - EVV

MDTEVV

Harrisburg

Wed 5/28

4:00 pm-1:23 pm

1 stop22h 23m

Evansville Dress Regional

Sun 6/1

8:20 am-12:23 pm

1 stop27h 03m

$240

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Mon 5/26

7:41 am-9:02 am

Nonstop2h 21m

Chicago O'Hare Intl

Tue 6/3

8:25 am-11:21 am

Nonstop1h 56m

$245

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 5/23

9:29 pm-8:03 pm

2 stops23h 34m

Chicago O'Hare Intl

Mon 5/26

7:47 am-8:35 am

1 stop23h 48m

$249

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Tue 7/8

6:00 am-12:29 pm

2 stops7h 29m

Chicago Midway

Sat 7/12

1:09 pm-11:52 pm

2 stops9h 43m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Fri 7/4

6:10 am-9:37 am

1 stop4h 27m

Lambert-St Louis

Sun 7/6

6:40 am-11:54 am

1 stop4h 14m

$263

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Sat 6/7

6:24 am-9:51 am

1 stop4h 27m

Chicago O'Hare Intl

Thu 6/12

11:00 am-4:14 pm

1 stop4h 14m

$265

HarrisburgPeoria

MDT - PIA

MDTPIA

Harrisburg

Thu 5/29

5:37 am-11:04 am

1 stop6h 27m

Greater Peoria

Sun 6/1

5:05 pm-10:24 pm

1 stop4h 19m

$269

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Thu 5/29

6:30 am-7:41 am

Nonstop2h 11m

Chicago O'Hare Intl

Sat 5/31

7:35 pm-10:39 pm

Nonstop2h 04m

$279

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Sat 7/19

11:23 am-8:22 pm

1 stop9h 59m

Chicago Midway

Sat 7/26

9:12 pm-10:08 am

1 stop11h 56m

$292

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Wed 5/28

6:15 am-9:56 am

1 stop4h 41m

Lambert-St Louis

Wed 6/4

5:00 am-10:14 am

1 stop4h 14m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 37 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, August is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $245). Flying from Harrisburg to Illinois in March is currently the most expensive (average of $321). 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 May 1, 2025.

When flying from Harrisburg to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Harrisburg to Illinois

Explore weekly flight availability from Harrisburg to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 1, 2025.

The most flights from MDT to USIL are scheduled on a Thursday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 May 1, 2025.
Read through reviews of airlines operating flights from Harrisburg to Illinois, such as Delta, United Airlines and Allegiant Air. 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
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Allegiant Air
7.3
Good
734 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
6.0
Okay
3,287 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $135. Users have also found prices from $141 and $165 on American Airlines and Allegiant Air, 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: Republic Airways (91%), Piedmont Airlines (86%), Alaska Airlines( 84%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $766, our data shows the cheapest flight currently is $134. 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, August is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $245). Flying from Harrisburg to Illinois in March is currently the most expensive (average of $321). 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.

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Alternative routes for Harrisburg to Illinois

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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$119Average$333FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$201Average$392FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$207Average$457FlexibilityNo cancel feeOn-time71%

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