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Illinois

$121+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
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 June 21, 2026.

This American Airlines deal was found by Cheapflights users on 6/20. 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 7/255:53 am
MDT
-
ORD
Nonstop2h 21m
American Airlines
Sat 8/19:18 pm
ORD
-
MDT
Nonstop2h 04m
American Airlines
Deal found 6/20$269
This United Airlines deal was found by Cheapflights users on 6/16. 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 8/126:30 am
MDT
-
ORD
Nonstop2h 11m
United Airlines
Sun 8/165:50 pm
ORD
-
MDT
Nonstop2h 03m
United Airlines
Deal found 6/16$279
This United Airlines deal was found by Cheapflights users on 6/17. 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 8/66:30 am
MDT
-
ORD
Nonstop2h 12m
United Airlines
Sat 8/84:40 pm
ORD
-
MDT
Nonstop2h 08m
United Airlines
Deal found 6/17$281
This United Airlines deal was found by Cheapflights users on 6/17. 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 9/116:30 am
MDT
-
ORD
Nonstop2h 11m
United Airlines
Sun 9/137:00 am
ORD
-
MDT
Nonstop2h 05m
United Airlines
Deal found 6/17$287
This Delta deal was found by Cheapflights users on 6/16. 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.
Wed 8/1212:22 pm
MDT
-
ORD
1 stop4h 55m
Delta
Sun 8/165:30 am
ORD
-
MDT
1 stop7h 43m
Delta
Deal found 6/16$289
This Delta deal was found by Cheapflights users on 6/18. 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 7/186:22 pm
MDT
-
MDW
1 stop4h 53m
Delta
Sat 7/256:35 pm
MDW
-
MDT
1 stop3h 34m
Delta
Deal found 6/18$289
This American Airlines deal was found by Cheapflights users on 6/20. 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 8/57:34 pm
MDT
-
STL
1 stop5h 00m
American Airlines
Sat 8/155:42 pm
STL
-
MDT
1 stop4h 21m
American Airlines
Deal found 6/20$291
This United Airlines deal was found by Cheapflights users on 6/19. 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 7/107:59 pm
MDT
-
ORD
1 stop4h 32m
United Airlines
Mon 7/136:25 pm
ORD
-
MDT
Nonstop2h 04m
United Airlines
Deal found 6/19$296
This American Airlines deal was found by Cheapflights users on 6/19. 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 7/67:38 pm
MDT
-
ORD
1 stop5h 51m
American Airlines
Fri 7/249:18 pm
ORD
-
MDT
Nonstop2h 04m
American Airlines
Deal found 6/19$299
This Delta deal was found by Cheapflights users on 6/17. 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.
Wed 9/26:24 pm
MDT
-
STL
1 stop5h 57m
Delta
Sun 9/136:00 am
STL
-
MDT
1 stop7h 09m
Delta
Deal found 6/17$300
This United Airlines deal was found by Cheapflights users on 6/16. 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 7/96:30 am
MDT
-
ORD
Nonstop2h 12m
United Airlines
Sun 7/126:25 pm
ORD
-
MDT
Nonstop2h 04m
United Airlines
Deal found 6/16$301
This United Airlines deal was found by Cheapflights users on 6/17. 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 10/15:54 pm
MDT
-
ORD
Nonstop2h 11m
United Airlines
Sat 10/36:50 am
ORD
-
MDT
Nonstop2h 01m
United Airlines
Deal found 6/17$303

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(American Airlines)

One-way from

$121
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$329
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, 6% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 21, 2026.
Use the filters below to find and compare flights from Harrisburg to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 11/13

7:59 pm-11:37 pm

1 stop4h 38m

Chicago O'Hare Intl

Sun 11/15

5:52 pm-8:47 pm

Nonstop1h 55m

$279

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Fri 9/18

12:15 pm-4:14 pm

1 stop4h 59m

Chicago O'Hare Intl

Sun 9/20

5:30 am-11:12 am

1 stop4h 42m

$289

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Thu 7/16

7:59 pm-11:31 pm

1 stop4h 32m

Chicago O'Hare Intl

Mon 7/20

6:25 pm-9:29 pm

Nonstop2h 04m

$289

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Thu 7/30

7:38 pm-11:32 pm

1 stop4h 54m

Lambert-St Louis

Sun 8/2

5:48 pm-11:10 pm

1 stop4h 22m

$309

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Sat 8/8

6:15 am-9:17 am

1 stop4h 02m

Chicago Midway

Sun 8/9

6:05 am-2:13 pm

1 stop7h 08m

$309

HarrisburgMoline

MDT - MLI

MDTMLI

Harrisburg

Sat 8/1

7:15 pm-12:41 am

1 stop6h 26m

Moline Quad-City

Thu 8/6

6:00 am-12:45 pm

1 stop5h 45m

$309

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

Thu 10/22

6:10 am-8:45 am

1 stop3h 35m

Chicago Midway

Mon 10/26

6:00 am-2:09 pm

1 stop7h 09m

$309

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

Sat 7/11

6:20 am-9:31 am

1 stop4h 11m

Lambert-St Louis

Wed 7/15

10:19 am-4:58 pm

1 stop5h 39m

$309

HarrisburgMoline

MDT - MLI

MDTMLI

Harrisburg

Fri 8/21

1:25 pm-6:11 pm

1 stop5h 46m

Moline Quad-City

Tue 8/25

11:43 am-9:59 pm

2 stops9h 16m

$314
Quickest round-trip

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

Wed 7/1

5:55 pm-7:05 pm

Nonstop2h 10m

Chicago O'Hare Intl

Mon 7/13

6:25 pm-9:29 pm

Nonstop2h 04m

$321

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

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, October is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $135). Flying from Harrisburg to Illinois in January is currently the most expensive (average of $209). 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 June 21, 2026.

It’s typically best to fly out from Harrisburg to Illinois in the evening. Doing so could potentially save you 32% on the flight price compared to flying at noon, which is usually more expensive.

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 June 21, 2026.

The most flights from MDT to USIL are scheduled on a Friday (17 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (12 on average).

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

How far ahead should I book a flight from Harrisburg to Illinois?

The price you pay for your flight from Harrisburg to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 June 20, 2026.

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

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 June 21, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican 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
7.8
Good
8,423 reviews

Comfort

7.8

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,423 reviews
Delta
7.8
Good
8,423 reviews

Comfort

7.8

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,868 reviews
Delta
7.8
Good
8,423 reviews

Comfort

7.8

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,722 reviews
Delta
7.8
Good
8,423 reviews

Comfort

7.8

Overall

7.8

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 $279, United Airlines can have you in Illinois from Harrisburg in 4h 38m. 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 - 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 (92%), Envoy Air (91%), Japan Airlines( 89%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $839, our data shows the cheapest flight currently is $173. When looking at the most popular route, (Harrisburg - Chicago O'Hare Intl), you can expect to pay $269 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, October is the cheapest month in which you can book a flight from Harrisburg to Illinois (average of $135). Flying from Harrisburg to Illinois in January is currently the most expensive (average of $209). 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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Alternative routes for Harrisburg to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$209Average$308FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$209Average$367FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$408FlexibilityNo cancel feeOn-timeN/A

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