How long is the flight from Harrisburg to Decatur, Illinois?

For as low as $487, United Airlines can have you in Decatur, Illinois from Harrisburg in 12h 38m. Harrisburg and Decatur, Illinois are separated by a distance of 640 mi.

In terms of precipitation, rainfall in Decatur, Illinois ranges from 1.7 - 4.4 inches per month. June is typically the wettest month, when rainfall can reach 4.4 in. January is typically the driest time to visit Decatur, Illinois when rainfall is around 1.7 in.

If weather is an important factor for your trip to Decatur, 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 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 26.6 F).

What is the cheapest time of day to fly from MDT to DEC?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Harrisburg to Decatur, Illinois as you normally would.

Most accurate provider : When it comes to deals on Harrisburg-Decatur, Illinois flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harrisburg-Decatur, Illinois flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harrisburg-Decatur, Illinois flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Harrisburg-Decatur, Illinois flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harrisburg-Decatur, Illinois flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Harrisburg to Decatur that include hotel bookings?

Yes. In addition to deals on Harrisburg to Decatur flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Harrisburg to Decatur?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harrisburg to Decatur.

Can I find deals for business class flights from Harrisburg to Decatur?

Yes. Cheapflights offers flight deals from Harrisburg to Decatur by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$415+ Cheap Flights from Harrisburg to Decatur, IL

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Harrisburg to Decatur with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Harrisburg to Decatur

Cheapest

Best

Last-minute

Cheapest flights from Harrisburg to Decatur
Explore the most affordable flight options available from Harrisburg to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

Tue 10/272:12 pm

MDT

DEC

1 stop4h 39m

United Airlines

Sat 10/316:55 pm

DEC

MDT

1 stop15h 00m

United Airlines

Deal found 2/8

$415

Sun 3/86:15 am

MDT

DEC

1 stop12h 38m

United Airlines

Sun 3/159:50 am

DEC

MDT

1 stop10h 15m

United Airlines

Deal found 2/8

$487

Find flight deals from Harrisburg to Decatur

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$487 (United Airlines)

Provider with most accurate pricing for Harrisburg-Decatur Arpt flight deals.

Search Deals

Provider most trusted by Cheapflights users for Harrisburg-Decatur Arpt flights.

Search Deals

From Harrisburg to Decatur Arpt

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

HarrisburgDecatur

MDT - DEC

MDTDEC

Harrisburg

Sun 3/8

6:15 am-5:53 pm

1 stop12h 38m

Decatur Arpt

Sun 3/15

9:50 am-9:05 pm

1 stop10h 15m

$487

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Most accurate provider: When it comes to deals on Harrisburg-Decatur, Illinois flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harrisburg-Decatur, Illinois flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harrisburg-Decatur, Illinois flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Harrisburg-Decatur, Illinois flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harrisburg-Decatur, Illinois flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Harrisburg to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from Harrisburg with our price prediction graph.

MDT-DEC

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.

Related info for your journey

How long is the flight from Harrisburg to Decatur, Illinois?
For as low as $487, United Airlines can have you in Decatur, Illinois from Harrisburg in 12h 38m. Harrisburg and Decatur, Illinois are separated by a distance of 640 mi.
Can I find deals for flights from Harrisburg to Decatur that include hotel bookings?
Yes. In addition to deals on Harrisburg to Decatur flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Harrisburg to Decatur?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harrisburg to Decatur.
Can I find deals for business class flights from Harrisburg to Decatur?
Yes. Cheapflights offers flight deals from Harrisburg to Decatur by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Mattoon

Effingham

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Decatur flight routes

Flights by cabin class

Other flight options

Popular flights

Alternative routes for Harrisburg to Decatur

John F Kennedy Intl to O'Hare Intl flights

Newark to O'Hare Intl flights

LaGuardia to O'Hare Intl flights

Reagan-National to O'Hare Intl flights

Dulles Intl to O'Hare Intl flights

Newark to Midway flights

John F Kennedy Intl to Midway flights

Philadelphia to O'Hare Intl flights

LaGuardia to Midway flights

Dulles Intl to Midway flights

LaGuardia to St. Louis flights

Newark to St. Louis flights

Philadelphia to Midway flights

Reagan-National to Midway flights

John F Kennedy Intl to St. Louis flights

Dulles Intl to St. Louis flights

Pittsburgh to O'Hare Intl flights

Philadelphia to St. Louis flights

Reagan-National to St. Louis flights

Allentown to O'Hare Intl flights

Harrisburg to O'Hare Intl flights

Pittsburgh to Midway flights

State College to O'Hare Intl flights

Scranton to O'Hare Intl flights

Pittsburgh to St. Louis flights

Allentown to Midway flights

Harrisburg to Midway flights

Harrisburg to St. Louis flights

Reagan-National to Peoria flights

Dulles Intl to Peoria flights

Dulles Intl to Moline flights

Allentown to St. Louis flights

Scranton to Midway flights

Erie to O'Hare Intl flights

Philadelphia to Moline flights

Newark to Peoria flights

LaGuardia to Peoria flights

State College to St. Louis flights

Reagan-National to Moline flights

Philadelphia to Peoria flights

LaGuardia to Moline flights

Newark to Bloomington flights

Reagan-National to Evansville flights

Allentown to Peoria flights

Newark to Evansville flights

Dulles Intl to Evansville flights

Newark to Champaign flights

LaGuardia to Evansville flights

Allentown to Moline flights

Elmira to O'Hare Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$415+ Cheap flights from Harrisburg to Decatur, IL (MDT - DEC)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Harrisburg to Decatur with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Harrisburg to Decatur

Cheapest flights from Harrisburg to DecaturExplore the most affordable flight options available from Harrisburg to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

Explore the most affordable flight options available from Harrisburg to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

Best flights from Harrisburg to DecaturDiscover carefully curated flight deals from Harrisburg to Decatur that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 9, 2026.

Discover carefully curated flight deals from Harrisburg to Decatur that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 9, 2026.

Last-minute flights from Harrisburg to DecaturDiscover last-minute flight deals from Harrisburg to Decatur. Data last updated February 9, 2026 and is based on user searches.

Discover last-minute flight deals from Harrisburg to Decatur. Data last updated February 9, 2026 and is based on user searches.

Find flight deals from Harrisburg to Decatur

Most accurate provider

Most trusted provider

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Harrisburg to Decatur that are best for you.

Best time to book a flight from Harrisburg to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from Harrisburg with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Harrisburg to Decatur. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Harrisburg to Decatur, Illinois?

Can I find deals for flights from Harrisburg to Decatur that include hotel bookings?

How can I find direct flights from Harrisburg to Decatur?

Can I find deals for business class flights from Harrisburg to Decatur?

Traveling to a place near Decatur?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Harrisburg to Decatur

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Decatur by adding a car rental and/or hotel reservation to your travel itinerary.

Other flights to Decatur

Explore flights to Decatur departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 9, 2026.

Search flights from Harrisburg to Decatur by cabin class

Find flights from Harrisburg to Decatur, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Harrisburg and Decatur flights

Browse other Harrisburg and Decatur flight options. Last updated on February 9, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Harrisburg to Decatur
Explore the most affordable flight options available from Harrisburg to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 9, 2026.

Best flights from Harrisburg to Decatur
Discover carefully curated flight deals from Harrisburg to Decatur that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 9, 2026.

Last-minute flights from Harrisburg to Decatur
Discover last-minute flight deals from Harrisburg to Decatur. Data last updated February 9, 2026 and is based on user searches.