$239 Cheap Flights from Buffalo (BUF) to Decatur (DEC)

View $239 flight on Thu, Nov 27, 2025Opens in a new window

Popular airlines from Buffalo Niagara Intl. Airport (BUF) to Decatur, IL (DEC)

Cheap Flights from Buffalo to Decatur (BUF-DEC)

Prices were available within the past 7 days and start at $239 for one-way flights and $314 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Nov 10 - Thu, Nov 27
BUF
Buffalo
DEC
Decatur
$314 Roundtrip, found 8 hours ago
$314
Roundtrip
found 8 hours ago
Select United flight, departing Mon, Nov 10 from Buffalo to Decatur, returning Thu, Nov 27, priced at $314 found 8 hours ago
United
Tue, Oct 28 - Sun, Nov 9
BUF
Buffalo
DEC
Decatur
$319 Roundtrip, found 8 hours ago
$319
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Oct 28 from Buffalo to Decatur, returning Sun, Nov 9, priced at $319 found 8 hours ago
United
Thu, Nov 13 - Thu, Nov 27
BUF
Buffalo
DEC
Decatur
$324 Roundtrip, found 8 hours ago
$324
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Nov 13 from Buffalo to Decatur, returning Thu, Nov 27, priced at $324 found 8 hours ago
United
Tue, Oct 28 - Wed, Nov 12
BUF
Buffalo
DEC
Decatur
$329 Roundtrip, found 8 hours ago
$329
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Oct 28 from Buffalo to Decatur, returning Wed, Nov 12, priced at $329 found 8 hours ago
United
Sun, Nov 2 - Wed, Nov 19
BUF
Buffalo
DEC
Decatur
$334 Roundtrip, found 8 hours ago
$334
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Nov 2 from Buffalo to Decatur, returning Wed, Nov 19, priced at $334 found 8 hours ago
United
Mon, Oct 27 - Sun, Nov 9
BUF
Buffalo
DEC
Decatur
$344 Roundtrip, found 8 hours ago
$344
Roundtrip
found 8 hours ago
Select United flight, departing Mon, Oct 27 from Buffalo to Decatur, returning Sun, Nov 9, priced at $344 found 8 hours ago
United
Fri, Oct 24 - Wed, Oct 29
BUF
Buffalo
DEC
Decatur
$349 Roundtrip, found 8 hours ago
$349
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 24 from Buffalo to Decatur, returning Wed, Oct 29, priced at $349 found 8 hours ago
United
Wed, Oct 22 - Sun, Nov 9
BUF
Buffalo
DEC
Decatur
$354 Roundtrip, found 8 hours ago
$354
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Oct 22 from Buffalo to Decatur, returning Sun, Nov 9, priced at $354 found 8 hours ago
United
Tue, Oct 28 - Fri, Nov 7
BUF
Buffalo
DEC
Decatur
$359 Roundtrip, found 8 hours ago
$359
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Oct 28 from Buffalo to Decatur, returning Fri, Nov 7, priced at $359 found 8 hours ago
United
Wed, Oct 22 - Fri, Oct 31
BUF
Buffalo
DEC
Decatur
$364 Roundtrip, found 8 hours ago
$364
Roundtrip
found 8 hours ago
Select United flight, departing Wed, Oct 22 from Buffalo to Decatur, returning Fri, Oct 31, priced at $364 found 8 hours ago

Alternative airports near Decatur

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Decatur, IL DEC. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $319
DEC
Decatur, IL
CheapestClosest
Average driving time to city center8 min
Flights from $319

Frequently asked questions

How much does a flight from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC) cost?
Secure a cheap one-way flight from $239 or cheap return flight from $314 from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC)?
The cheapest month to fly from BUF to DEC is November, when there's less demand. Off-peak months are typically when better flight deals are available between these airports.
What is the cheapest airline that flies from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest BUF to DEC flight.
How many flights per day from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC)?
Direct flights from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BUF to DEC?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary based on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC)?
Opt for a flight from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC) last-minute?
Booking your flight from BUF to DEC right before your getaway is generally more expensive. However, if you're flexible with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a BUF to DEC flight and hotel package?
You can save money by securing a BUF to DEC flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your preferred accommodations and flights, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Buffalo Niagara Intl. Airport (BUF) to Decatur Airport (DEC)?
Usually, it's possible to cancel or reschedule your BUF to DEC flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Origin airport
Buffalo Niagara Intl.
Destination airport
Decatur
Airlines serving
United
Roundtrip price
$314
Distance
567 mi

Book with confidence

Buffalo to Decatur Flights

The cheapest times to fly from Buffalo to Decatur

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 Buffalo to Decatur are during the month of November. You can find some of the cheapest flights from Buffalo to Decatur with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Buffalo to Decatur

Sunday is one of the best days to book for cheap flights from Buffalo to Decatur: 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 Buffalo to Decatur

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 Buffalo to Decatur in 2025. You can also book with separate airlines for your outbound and return journeys, from $239 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 Buffalo to Decatur 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 Buffalo to Decatur 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.

 

Buffalo to Decatur Flights

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*Available to One Key members.