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 BHM to DEC?

When flying from Birmingham, Alabama to Decatur, Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Most trusted provider : When it comes to deals on Birmingham, Alabama-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 Birmingham, Alabama-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 Birmingham to Decatur that include hotel bookings?

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

How can I find direct flights from Birmingham to Decatur?

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

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

Yes. Cheapflights offers flight deals from Birmingham 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.

$474+ Cheap Flights from Birmingham, AL to Decatur, IL

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Cheap flight deals from Birmingham to Decatur

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Cheapest flights from Birmingham to Decatur
Explore the most affordable flight options available from Birmingham to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Fri 11/61:15 pm -

1 stop4h 55m

Sat 11/146:57 pm -

1 stop4h 33m

Deal found 10/30

$474

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Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars

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BirminghamDecatur

BHM Birmingham - DEC Decatur Arpt

BHMDEC

Birmingham

Sun 11/29

6:05 am-8:09 am

1 stop26h 04m

Decatur Arpt

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Sorted by cheapest first

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

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

BHM-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

Can I find deals for flights from Birmingham to Decatur that include hotel bookings?
Yes. In addition to deals on Birmingham to Decatur flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Birmingham to Decatur?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Birmingham to Decatur.
Can I find deals for business class flights from Birmingham to Decatur?
Yes. Cheapflights offers flight deals from Birmingham 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.

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$474+ Cheap flights from Birmingham, AL to Decatur, IL (BHM - 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Birmingham to Decatur with Cheapflights

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Cheap flight deals from Birmingham to Decatur

Cheapest flights from Birmingham to DecaturExplore the most affordable flight options available from Birmingham to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Explore the most affordable flight options available from Birmingham to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Last-minute flights from Birmingham to DecaturDiscover last-minute flight deals from Birmingham to Decatur. Data last updated October 30, 2026 and is based on user searches.

Discover last-minute flight deals from Birmingham to Decatur. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Birmingham to DecaturSearch for one-way flight options from Birmingham to Decatur. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

Search for one-way flight options from Birmingham to Decatur. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.

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Best time to book a flight from Birmingham to Decatur

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

Related info for your journey

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

How can I find direct flights from Birmingham to Decatur?

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

Traveling to a place near Decatur?

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Other flights to Decatur

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Cheapest flights from Birmingham to Decatur
Explore the most affordable flight options available from Birmingham to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2026.

Last-minute flights from Birmingham to Decatur
Discover last-minute flight deals from Birmingham to Decatur. Data last updated October 30, 2026 and is based on user searches.

One-way flights from Birmingham to Decatur
Search for one-way flight options from Birmingham to Decatur. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.