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$99+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$209
(American Airlines)

One-way from

$99
(Frontier)

Popular in

May

Cheapest in

January

Average price

$337
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. 5% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. 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.
vie. 9/196:00 amMDT - ORD
Nonstop2h 09mAmerican Airlines
dom. 9/218:05 amORD - MDT
Nonstop1h 56mAmerican Airlines
Deal found 7/30$209
This Mytrip deal was found by Cheapflights users on 7/28. 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.
lun. 8/189:22 pmMDT - ORD
2 stops22h 45mMultiple Airlines
jue. 8/2111:36 amORD - MDT
2 stops23h 10mMultiple Airlines
Deal found 7/28$211
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1911:07 amMDT - ORD
1 stop9h 37mFrontier
dom. 9/218:49 pmORD - MDT
1 stop12h 13mFrontier
Deal found 7/30$218
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/1711:21 amMDT - STL
1 stop13h 26mFrontier
dom. 8/242:02 pmSTL - MDT
1 stop18h 56mFrontier
Deal found 7/30$225
This Mytrip deal was found by Cheapflights users on 7/29. 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.
vie. 8/2210:43 amMDT - MDW
1 stop24h 11mFrontier
dom. 8/249:17 amMDW - MDT
1 stop23h 41mFrontier
Deal found 7/29$228
This Delta deal was found by Cheapflights users on 7/27. 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.
mié. 8/206:10 amMDT - ORD
1 stop5h 10mDelta
dom. 8/249:10 amORD - MDT
1 stop6h 03mDelta
Deal found 7/27$229
This Delta deal was found by Cheapflights users on 7/27. 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.
mié. 8/206:00 amMDT - MDW
1 stop6h 48mDelta
mar. 8/266:17 pmMDW - MDT
1 stop4h 02mDelta
Deal found 7/27$229
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:45 amMDT - ORD
Nonstop2h 07mUnited Airlines
dom. 9/217:10 amORD - MDT
Nonstop2h 04mUnited Airlines
Deal found 7/28$238
This American Airlines deal was found by Cheapflights users on 7/30. 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.
jue. 9/114:55 pmMDT - STL
1 stop5h 11mAmerican Airlines
dom. 9/147:22 amSTL - MDT
1 stop4h 48mAmerican Airlines
Deal found 7/30$249
This American Airlines deal was found by Cheapflights users on 7/29. 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.
vie. 9/196:30 pmMDT - MLI
1 stop4h 55mAmerican Airlines
mar. 9/233:26 pmMLI - MDT
1 stop6h 16mAmerican Airlines
Deal found 7/29$249
This Delta deal was found by Cheapflights users on 7/28. 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.
mié. 8/276:00 amMDT - STL
1 stop7h 31mDelta
mié. 9/31:26 pmSTL - MDT
2 stops8h 53mDelta
Deal found 7/28$254
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/306:30 amMDT - STL
1 stop5h 10mUnited Airlines
dom. 8/35:30 pmSTL - MDT
1 stop4h 26mUnited Airlines
Deal found 7/28$326

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 julio 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

sáb. 8/30

5:00 am-6:18 am

Nonstop2h 18m

Chicago O'Hare Intl

lun. 9/1

8:39 pm-11:56 pm

Nonstop2h 17m

$209

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

lun. 8/18

9:22 pm-7:07 pm

2 stops22h 45m

Chicago O'Hare Intl

jue. 8/21

11:36 am-11:46 am

2 stops23h 10m

$211

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

vie. 9/19

11:07 am-7:44 pm

1 stop9h 37m

Chicago O'Hare Intl

dom. 9/21

8:49 pm-10:02 am

1 stop12h 13m

$218

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

dom. 8/17

11:21 am-11:47 pm

1 stop13h 26m

Lambert-St Louis

dom. 8/24

2:02 pm-9:58 am

1 stop18h 56m

$225

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

vie. 8/22

10:43 am-9:54 am

1 stop24h 11m

Chicago Midway

dom. 8/24

9:17 am-9:58 am

1 stop23h 41m

$228

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

mié. 8/20

6:10 am-10:20 am

1 stop5h 10m

Chicago O'Hare Intl

mar. 8/26

7:15 am-11:52 am

1 stop3h 37m

$229

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

mié. 8/20

6:10 am-8:35 am

1 stop3h 25m

Chicago Midway

dom. 8/24

6:17 pm-10:59 pm

1 stop3h 42m

$229

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

vie. 9/19

6:45 am-7:52 am

Nonstop2h 07m

Chicago O'Hare Intl

dom. 9/21

7:10 am-10:14 am

Nonstop2h 04m

$238

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

jue. 9/11

4:55 pm-9:06 pm

1 stop5h 11m

Lambert-St Louis

dom. 9/14

7:22 am-1:10 pm

1 stop4h 48m

$249

HarrisburgMoline

MDT - MLI

MDTMLI

Harrisburg

vie. 9/19

6:30 pm-10:25 pm

1 stop4h 55m

Moline Quad-City

mar. 9/23

3:26 pm-10:42 pm

1 stop6h 16m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 39 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 julio 30, 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 julio 30, 2025.

The most flights from MDT to USIL are scheduled on a Monday (15 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 on average).

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 julio 30, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Allegiant Air
7.2
Good
703 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 $99. Users have also found prices from $126 and $224 on Delta 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: Qatar Airways (91%), Piedmont Airlines (91%), Japan Airlines( 84%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $1,139, our data shows the cheapest flight currently is $223. 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.

See more FAQs

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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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$119Average$345FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$201Average$351FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$207Average$345FlexibilityNo cancel feeOn-time71%

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