Cheap Flights from Decatur (DEC) to Tri-Cities (TRI)

Popular airlines from Decatur, IL (DEC) to Tri-Cities, TN (TRI-Tri-Cities Regional)

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Frequently asked questions

How much does a flight from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI) cost?
Grab a cheap one-way flight or cheap return flight from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI)?
Planning your getaway for can help you save, as it's the cheapest month for flights between DEC and TRI. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from DEC to TRI. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI)?
There aren't any daily direct flights departing from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from DEC to TRI?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI)?
Select a flight from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI) last-minute?
Last-minute bookings from DEC to TRI are usually more expensive. To secure the best rates, start looking for flights early. That being said, if you're flexible with your travel plans, you may land a cheap ticket just before your departure.
Is it cheaper to book a DEC to TRI flight and hotel package?
You can save money by booking a DEC to TRI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your ideal flights and accommodations, consider adding extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Decatur Airport (DEC) to Tri-Cities Regional Airport (TRI)?
If you booked your DEC to TRI flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
Decatur
Destination airport
Tri-Cities Regional
Distance
420 mi

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Decatur to Tri-Cities Flights

The cheapest times to fly from Decatur to Tri-Cities

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Decatur to Tri-Cities are during the month of . You can find some of the cheapest flights from Decatur to Tri-Cities with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Decatur to Tri-Cities

Sunday is one of the best days to book for cheap flights from Decatur to Tri-Cities: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Decatur to Tri-Cities

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Decatur to Tri-Cities in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Decatur to Tri-Cities flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Decatur to Tri-Cities airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Decatur to Tri-Cities Flights

*Flight schedules are subject to change.

*Available to One Key members.