The cheapest times to fly from DEC to GSP are

  • March 26th to April 29th (except the week of April 9th)
  • October 29th to November 18th
  • December 3rd to March 11th (except the weeks of December 17th and December 24th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from DEC to GSP is late January. Prices can be as high as $614 for Monday flights during early to mid August, or as low as $364 for Saturday flights around late January.


When to Fly to Greenville

Flying from Decatur, IL (DEC) to Greer, SC (GSP) will usually cost between $365 to $553 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $377. Due to high demand the most expensive time to fly is early to mid August, with an average price of $614. Planning your trip to low-cost times can easily save you $237 on economy flights and even more on first-class flights. Generally, any price below $425 can be considered a good price for a round-trip DEC to GSP flight.

See below for a graph of average weekly prices for the DEC to GSP route. All prices are for round-trip tickets in USD.

DEC to GSP Flight Prices

Compared to other flights, the DEC to GSP flight is much cheaper than the average and costs much less than the average flight leaving from Decatur. The average price per mile (for a direct flight) is $0.53, which is above average.


Flight Prices by Day of the Week

Saturday is usually the cheapest day to fly to GSP, and Wednesday the cheapest day to fly back into DEC. Mondays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $97 (20%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Saturday and returning a week later will cost an average of $383. Return trip prices are from the GSP to DEC flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from DEC to GSP can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 1 hour 53 minutes may not be realistic.


Flight Hacking DEC to GSP

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from DEC to GSP — but Champion Traveler does!

Hack #1: St. Louis, MO (DEC > STL > GSP)

  • Price for both tickets: $348
  • Average savings: $77 (18.12%)

See DEC to STL flights

Hack #2: Chicago, IL (DEC > ORD > GSP)

  • Price for both tickets: $418
  • Average savings: $7 (1.65%)

See DEC to ORD flights


Flight Questions Answered

Still have questions about flying from DEC to GSP? We’ve got answers.

Which airlines fly this route?

You can find 4 major airlines flying this route most often: American, Cape Air, Delta, United, and potentially more during busy seasons.

How far away is it from Greenville-Spartanburg International Airport to Decatur Airport?

The distance between the two airports is roughly 499 miles or 803 kilometers.

How long does it take to fly from DEC to GSP?

The real-world flight time for a nonstop DEC to GSP flight is about 1 hour 53 minutes.

How many flights go between Decatur, IL and Greer, SC?

It depends on the day of the week and the date, but a typical day might have around 21 available flights from DEC to GSP.


Airport Location Info


Departing Airport

Origination code DEC
Origination airport name Decatur Airport
City Decatur, IL
Country the United States
Latitude 39.8
Longitude -88.9

Return Airport

Destination code GSP
Destination airport name Greenville-Spartanburg International Airport
City Greer, SC
Country the United States
Latitude 34.9
Longitude -82.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.