$261 Cheap Flights from Boise (BOI) to Decatur (DEC)

View $261 flight on Sat, Aug 30, 2025Opens in a new window

Popular airlines from Boise Airport (BOI) to Decatur, IL (DEC)

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Cheap Flights from Boise to Decatur (BOI-DEC)

Prices were available within the past 7 days and start at $261 for one-way flights and $354 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Sep 10 - Fri, Oct 3
BOI
Boise
DEC
Decatur
$354 Roundtrip, found 5 days ago
$354
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Boise to Decatur, returning Fri, Oct 3, priced at $354 found 5 days ago
United
Wed, Sep 3 - Sat, Sep 20
BOI
Boise
DEC
Decatur
$359 Roundtrip, found 5 days ago
$359
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 3 from Boise to Decatur, returning Sat, Sep 20, priced at $359 found 5 days ago
United
Sun, Aug 31 - Sat, Sep 13
BOI
Boise
DEC
Decatur
$379 Roundtrip, found 5 days ago
$379
Roundtrip
found 5 days ago
Select United flight, departing Sun, Aug 31 from Boise to Decatur, returning Sat, Sep 13, priced at $379 found 5 days ago
United
Tue, Sep 9 - Sat, Sep 20
BOI
Boise
DEC
Decatur
$382 Roundtrip, found 5 days ago
$382
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Boise to Decatur, returning Sat, Sep 20, priced at $382 found 5 days ago
United
Wed, Aug 27 - Sat, Sep 13
BOI
Boise
DEC
Decatur
$384 Roundtrip, found 5 days ago
$384
Roundtrip
found 5 days ago
Select United flight, departing Wed, Aug 27 from Boise to Decatur, returning Sat, Sep 13, priced at $384 found 5 days ago
United
Wed, Sep 3 - Mon, Sep 22
BOI
Boise
DEC
Decatur
$387 Roundtrip, found 5 days ago
$387
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 3 from Boise to Decatur, returning Mon, Sep 22, priced at $387 found 5 days ago
United
Sat, Sep 6 - Sat, Sep 20
BOI
Boise
DEC
Decatur
$400 Roundtrip, found 5 days ago
$400
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 6 from Boise to Decatur, returning Sat, Sep 20, priced at $400 found 5 days ago
United
Sun, Aug 31 - Tue, Sep 16
BOI
Boise
DEC
Decatur
$403 Roundtrip, found 5 days ago
$403
Roundtrip
found 5 days ago
Select United flight, departing Sun, Aug 31 from Boise to Decatur, returning Tue, Sep 16, priced at $403 found 5 days ago
United
Sat, Dec 6 - Wed, Dec 17
BOI
Boise
DEC
Decatur
$405 Roundtrip, found 5 days ago
$405
Roundtrip
found 5 days ago
Select United flight, departing Sat, Dec 6 from Boise to Decatur, returning Wed, Dec 17, priced at $405 found 5 days ago
United
Sun, Sep 14 - Fri, Oct 3
BOI
Boise
DEC
Decatur
$413 Roundtrip, found 5 days ago
$413
Roundtrip
found 5 days ago
Select United flight, departing Sun, Sep 14 from Boise to Decatur, returning Fri, Oct 3, priced at $413 found 5 days 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 $436
DEC
Decatur, IL
CheapestClosest
Average driving time to city center8 min
Flights from $436
Flights from Boise (BOI) to Decatur (DEC)
Origin airport
Boise
Destination airport
Decatur
Roundtrip price
$354
Distance
1427 mi

Boise to Decatur Flights

The cheapest times to fly from Boise 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 Boise to Decatur are during the month of September. You can find some of the cheapest flights from Boise to Decatur with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boise to Decatur

Sunday is one of the best days to book for cheap flights from Boise 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 Boise 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 Boise to Decatur in 2025. You can also book with separate airlines for your outbound and return journeys, from $261 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 Boise 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 Boise 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.

 

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Decatur Airport (DEC) cost?
Snag a cheap one-way flight from $261 or cheap return flight from $354 from Boise Airport (BOI) 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 Boise Airport (BOI) to Decatur Airport (DEC)?
Flying in September may help you find better deals, as it's the cheapest month for flights between BOI and DEC. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Boise Airport (BOI) to Decatur Airport (DEC)?
To find the cheapest airline that'll fly you from BOI to DEC, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Boise Airport (BOI) to Decatur Airport (DEC)?
You'll have to catch a flight with a layover if you're traveling from Boise Airport (BOI) to Decatur Airport (DEC). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from BOI to DEC?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary 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 Boise Airport (BOI) to Decatur Airport (DEC)?
To touch down at Decatur Airport (DEC) on time, pick a flight that takes off from Boise Airport (BOI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Boise Airport (BOI) to Decatur Airport (DEC) last-minute?
Last-minute fares from BOI to DEC are generally more expensive. To secure the cheapest rates, start looking for flights as early as possible. That being said, if you can play around with your travel dates, it's possible to find a cheap fare right before your trip.
Is it cheaper to book a BOI to DEC flight and hotel package?
You can save money by booking a BOI 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 easy to manage it all in one convenient place. Once you've selected your ideal flights and accommodations, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Decatur Airport (DEC)?
In most cases, you can cancel or modify your BOI to DEC flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, head to our Customer Service portal.

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*Available to One Key members.