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$80+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap 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 January 28, 2026.

This Frontier deal was found by Cheapflights users on 1/25. 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.
Mon 2/2310:46 am
MDT
-
MDW
1 stop10h 41m
Frontier
Mon 3/29:22 pm
MDW
-
MDT
1 stop12h 10m
Frontier
Deal found 1/25$148
This Frontier deal was found by Cheapflights users on 1/26. 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.
Tue 2/1011:27 am
MDT
-
STL
1 stop12h 00m
Frontier
Sat 2/149:41 am
STL
-
MDT
1 stop7h 45m
Frontier
Deal found 1/26$184
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:25 pm
MDT
-
ORD
1 stop26h 46m
Multiple Airlines
Thu 3/58:16 pm
ORD
-
MDT
1 stop19h 20m
Multiple Airlines
Deal found 1/26$204
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/276:29 am
MDT
-
ORD
Nonstop2h 17m
United Airlines
Sun 3/17:09 am
ORD
-
MDT
Nonstop1h 55m
United Airlines
Deal found 1/27$209
This American Airlines deal was found by Cheapflights users on 1/26. 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 3/126:00 am
MDT
-
ORD
Nonstop2h 12m
American Airlines
Thu 3/197:39 pm
ORD
-
MDT
Nonstop1h 53m
American Airlines
Deal found 1/26$210
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Thu 3/266:15 am
MDT
-
ORD
Nonstop2h 17m
United Airlines
Fri 4/34:20 pm
ORD
-
MDT
1 stop6h 08m
United Airlines
Deal found 1/26$219
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Thu 4/28:29 am
MDT
-
ORD
Nonstop2h 21m
United Airlines
Mon 4/69:15 pm
ORD
-
MDT
Nonstop2h 07m
United Airlines
Deal found 1/25$225
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/126:31 pm
MDT
-
ORD
Nonstop2h 13m
American Airlines
Wed 2/187:25 pm
ORD
-
MDT
Nonstop1h 53m
American Airlines
Deal found 1/27$229
This Delta deal was found by Cheapflights users on 1/27. 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.
Thu 4/3012:13 pm
MDT
-
MDW
1 stop5h 12m
Delta
Sat 5/26:38 pm
MDW
-
MDT
1 stop3h 24m
Delta
Deal found 1/27$229
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2310:46 am
MDT
-
ORD
1 stop30h 06m
Frontier
Thu 2/264:42 pm
ORD
-
MDT
2 stops16h 09m
Frontier
Deal found 1/27$230
This Delta deal was found by Cheapflights users on 1/27. 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.
Thu 2/1212:12 pm
MDT
-
ORD
1 stop5h 37m
Delta
Wed 2/182:46 pm
ORD
-
MDT
1 stop7h 41m
Delta
Deal found 1/27$249
This Delta deal was found by Cheapflights users on 1/27. 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 5/112:13 pm
MDT
-
MDW
1 stop5h 12m
Delta
Sat 5/26:38 pm
MDW
-
MDT
1 stop3h 24m
Delta
Deal found 1/27$249

Find flight deals from Harrisburg to Illinois

Keep the following information in mind while searching for Harrisburg to Illinois flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$148
(Frontier)

One-way from

$80
(Frontier)

Popular in

January

Cheapest in

February

Average price

$354
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
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 28, 2026.
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

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Tue 2/10

11:27 am-10:27 pm

1 stop12h 00m

Lambert-St Louis

Sat 2/14

9:41 am-6:26 pm

1 stop7h 45m

$184

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 5/1

6:30 am-7:42 am

Nonstop2h 12m

Chicago O'Hare Intl

Sat 5/2

6:15 pm-9:19 pm

Nonstop2h 04m

$209

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 4/17

6:00 am-7:19 am

Nonstop2h 19m

Chicago O'Hare Intl

Mon 4/20

8:55 pm-11:50 pm

Nonstop1h 55m

$209

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Thu 3/26

6:15 am-7:32 am

Nonstop2h 17m

Chicago O'Hare Intl

Sun 3/29

7:05 am-10:07 am

Nonstop2h 02m

$209

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 3/27

6:15 am-7:32 am

Nonstop2h 17m

Chicago O'Hare Intl

Sat 4/4

4:20 pm-11:28 pm

1 stop6h 08m

$219

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Thu 4/2

8:29 am-9:50 am

Nonstop2h 21m

Chicago O'Hare Intl

Mon 4/6

9:15 pm-12:22 am

Nonstop2h 07m

$225

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 5/1

12:13 pm-4:42 pm

1 stop5h 29m

Chicago O'Hare Intl

Sat 5/2

8:55 am-3:38 pm

1 stop5h 43m

$229

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Thu 3/5

12:12 pm-6:49 pm

1 stop7h 37m

Chicago O'Hare Intl

Tue 3/10

5:30 am-12:39 pm

1 stop6h 09m

$229

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Sat 5/2

4:19 pm-8:40 pm

1 stop5h 21m

Chicago O'Hare Intl

Sun 5/3

7:00 am-11:30 am

1 stop3h 30m

$229

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Thu 4/30

12:13 pm-4:25 pm

1 stop5h 12m

Chicago Midway

Sat 5/2

6:38 pm-11:02 pm

1 stop3h 24m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 50 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 $55). Flying from Harrisburg to Illinois in June is currently the most expensive (average of $133). 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 January 28, 2026.

It’s typically best to fly out from Harrisburg to Illinois in the evening. Doing so could potentially save you 39% 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 January 24, 2026.

Travelers seeking maximum savings on their Harrisburg to Illinois flight should consider departing on Saturday 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.

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 January 28, 2026.

The most flights from MDT to USIL are scheduled on a Monday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

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 January 28, 2026.
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
8,123 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,123 reviews
Delta
7.9
Good
8,123 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,212 reviews
Delta
7.9
Good
8,123 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,201 reviews
Delta
7.9
Good
8,123 reviews

Boarding

8.1

Food

7.2

Overall

7.9

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 $209, Frontier can have you in Illinois from Harrisburg in 2h 12m. 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 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 - Decatur Arpt 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: Qatar Airways (82%), Emirates (77%), SkyWest Airlines( 75%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $709, our data shows the cheapest flight currently is $144. 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 $55). Flying from Harrisburg to Illinois in June is currently the most expensive (average of $133). 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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$207Average$326FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$209Average$362FlexibilityNo cancel feeOn-time69%
DeltaCheapest$228Average$353FlexibilityNo cancel feeOn-timeN/A

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