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$123+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$248
(Mytrip)

One-way from

$123
(Mytrip)

Popular in

October

Cheapest in

January

Average price

$324
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. 1% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/12. 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.
mar. 7/16:38 pmMDT - ORD
1 stop15h 12mMultiple Airlines
mar. 7/295:05 amORD - MDT
1 stop11h 50mMultiple Airlines
Deal found 6/12$248
This Delta deal was found by Cheapflights users on 6/10. 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. 9/106:00 amMDT - ORD
1 stop7h 16mDelta
dom. 9/147:00 amORD - MDT
1 stop3h 57mDelta
Deal found 6/10$249
This Delta deal was found by Cheapflights users on 6/10. 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.
sáb. 7/196:10 amMDT - MDW
1 stop3h 34mDelta
sáb. 7/265:53 pmMDW - MDT
1 stop4h 06mDelta
Deal found 6/10$249
This American Airlines deal was found by Cheapflights users on 6/12. 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.
mié. 11/126:27 pmMDT - STL
1 stop4h 14mAmerican Airlines
lun. 11/171:45 pmSTL - MDT
1 stop5h 16mAmerican Airlines
Deal found 6/12$249
This Delta deal was found by Cheapflights users on 6/11. 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.
mar. 8/266:00 amMDT - STL
1 stop7h 31mDelta
sáb. 8/3011:23 amSTL - MDT
2 stops11h 18mDelta
Deal found 6/11$254
This United Airlines deal was found by Cheapflights users on 6/10. 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. 9/102:24 pmMDT - ORD
1 stop6h 24mUnited Airlines
dom. 9/146:10 pmORD - MDT
Nonstop2h 06mUnited Airlines
Deal found 6/10$255
This American Airlines deal was found by Cheapflights users on 6/11. 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.
lun. 6/301:10 pmMDT - ORD
1 stop4h 45mAmerican Airlines
vie. 7/43:09 pmORD - MDT
Nonstop1h 49mAmerican Airlines
Deal found 6/11$256
This Booking.com deal was found by Cheapflights users on 6/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1211:34 amMDT - MDW
1 stop25h 22mFrontier
dom. 9/148:34 amMDW - MDT
1 stop25h 05mFrontier
Deal found 6/10$287
This American Airlines deal was found by Cheapflights users on 6/12. 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.
mié. 11/127:58 pmMDT - PIA
1 stop4h 56mAmerican Airlines
lun. 11/174:53 pmPIA - MDT
1 stop3h 31mAmerican Airlines
Deal found 6/12$294
This FlightHub deal was found by Cheapflights users on 6/12. 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.
vie. 9/1911:34 amMDT - ORD
1 stop28h 19mFrontier
dom. 9/216:10 amORD - MDT
1 stop27h 29mFrontier
Deal found 6/12$297
This Mytrip deal was found by Cheapflights users on 6/11. 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.
sáb. 7/264:36 pmMDT - STL
2 stops18h 16mMultiple Airlines
sáb. 8/23:34 pmSTL - MDT
1 stop25h 36mMultiple Airlines
Deal found 6/11$348
This United Airlines deal was found by Cheapflights users on 6/10. 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. 6/256:30 amMDT - PIA
1 stop4h 51mUnited Airlines
dom. 6/293:39 pmPIA - MDT
1 stop6h 17mUnited Airlines
Deal found 6/10$354

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 junio 12, 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

mar. 7/1

6:38 pm-8:50 am

1 stop15h 12m

Chicago O'Hare Intl

mar. 7/29

5:05 am-5:55 pm

1 stop11h 50m

$248

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

mié. 9/10

6:10 am-10:20 am

1 stop5h 10m

Chicago O'Hare Intl

sáb. 9/13

7:00 am-11:57 am

1 stop3h 57m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

mié. 11/12

6:27 pm-9:41 pm

1 stop4h 14m

Lambert-St Louis

lun. 11/17

1:45 pm-8:01 pm

1 stop5h 16m

$249

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

sáb. 7/19

6:10 am-8:44 am

1 stop3h 34m

Chicago Midway

sáb. 7/26

5:53 pm-10:59 pm

1 stop4h 06m

$249

HarrisburgSt. Louis

MDT - STL

MDTSTL

Harrisburg

mar. 8/26

6:00 am-12:31 pm

1 stop7h 31m

Lambert-St Louis

sáb. 8/30

11:23 am-11:41 pm

2 stops11h 18m

$254

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

mié. 9/10

2:24 pm-7:48 pm

1 stop6h 24m

Chicago O'Hare Intl

dom. 9/14

6:10 pm-9:16 pm

Nonstop2h 06m

$255

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

lun. 6/30

1:10 pm-4:55 pm

1 stop4h 45m

Chicago O'Hare Intl

vie. 7/4

3:09 pm-5:58 pm

Nonstop1h 49m

$256

HarrisburgChicago

MDT - MDW

MDTMDW

Harrisburg

vie. 9/12

11:34 am-11:56 am

1 stop25h 22m

Chicago Midway

dom. 9/14

8:34 am-10:39 am

1 stop25h 05m

$287

HarrisburgPeoria

MDT - PIA

MDTPIA

Harrisburg

mié. 11/12

7:58 pm-11:54 pm

1 stop4h 56m

Greater Peoria

lun. 11/17

4:53 pm-9:24 pm

1 stop3h 31m

$294

HarrisburgChicago

MDT - ORD

MDTORD

Harrisburg

vie. 9/19

11:34 am-2:53 pm

1 stop28h 19m

Chicago O'Hare Intl

dom. 9/21

6:10 am-10:39 am

1 stop27h 29m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 33 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 junio 12, 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 junio 12, 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 (11 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 junio 12, 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
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.3
Good
725 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,295 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $149. Users have also found prices from $161 and $190 on Allegiant Air and Delta, 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 (93%), United Airlines (89%), SkyWest Airlines( 88%).

  • What are the cheapest flights from Harrisburg to Illinois?

    While on average a flight from Harrisburg to Illinois is generally $2,454, our data shows the cheapest flight currently is $194. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$119Average$333FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$204Average$364FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$207Average$417FlexibilityNo cancel feeOn-time71%

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