How long is the flight from Decatur, Illinois to Japan?

United Airlines can get you from Decatur, Illinois to Japan in just under 20h 16m. Your travel time can differ by up to . Airlines will cover a distance of 6374 mi.

In terms of precipitation, rainfall in Japan ranges from 2.0 - 8.3 inches per month. September is typically the wettest month, when rainfall can reach 8.3 in. January is typically the driest time to visit Japan when rainfall is around 2.0 in.

If weather is an important factor for your trip to Japan, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

What is the cheapest time of day to fly from DEC to JP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Decatur, Illinois to Japan as you normally would.

What airport do you fly from for flights from Decatur to Japan?

If you book a flight to Japan from Decatur, you will be flying from Decatur Arpt, which is the city’s only airport. Decatur Arpt (DEC) is located 4.7 mi from the center of Decatur.

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

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

How can I find direct flights from Decatur to Japan?

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

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

Yes. Cheapflights offers flight deals from Decatur to Japan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$960+ Flights from Decatur, IL to Japan

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Cheap flight deals from Decatur to Japan

Best flights from Decatur to Japan
Discover carefully curated flight deals from Decatur to Japan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Sun 2/19:49 amDEC - HND

1 stop20h 16mUnited Airlines

Sun 2/86:20 pmHND - DEC

1 stop14h 41mUnited Airlines

Deal found 12/17

$960

Thu 1/159:49 amDEC - HND

1 stop16h 56mUnited Airlines

Thu 1/226:20 pmHND - DEC

1 stop14h 41mUnited Airlines

Deal found 12/17

$960

Fri 1/309:49 amDEC - HND

1 stop16h 56mUnited Airlines

Fri 2/69:05 pmHND - DEC

2 stops35h 56mUnited Airlines

Deal found 12/16

$965

Wed 1/217:09 pmDEC - HND

2 stops56h 36mUnited Airlines

Sun 1/256:20 pmHND - DEC

1 stop14h 41mUnited Airlines

Deal found 12/15

$1,010

Wed 1/219:49 amDEC - NRT

2 stops38h 41mUnited Airlines

Sun 1/255:45 pmNRT - DEC

2 stops30h 20mUnited Airlines

Deal found 12/15

$1,030

Sat 1/317:09 pmDEC - NRT

2 stops29h 46mUnited Airlines

Sat 2/75:05 pmNRT - DEC

1 stop15h 56mUnited Airlines

Deal found 12/17

$1,076

Fri 1/307:09 pmDEC - NRT

2 stops28h 51mUnited Airlines

Fri 2/65:05 pmNRT - DEC

1 stop15h 56mUnited Airlines

Deal found 12/16

$1,076

Last-minute flights from Decatur to Japan
Discover last-minute flight deals from Decatur to Japan. Data last updated December 18, 2025 and is based on user searches.

Thu 1/159:49 amDEC - HND

1 stop16h 56mUnited Airlines

Thu 1/226:20 pmHND - DEC

1 stop14h 41mUnited Airlines

Deal found 12/17

$960

Wed 1/217:09 pmDEC - HND

2 stops56h 36mUnited Airlines

Sun 1/256:20 pmHND - DEC

1 stop14h 41mUnited Airlines

Deal found 12/17

$1,010

Wed 1/217:09 pmDEC - NRT

2 stops29h 11mUnited Airlines

Sun 1/255:35 pmNRT - DEC

2 stops30h 30mUnited Airlines

Deal found 12/17

$1,030

Fri 1/309:49 amDEC - HND

1 stop16h 56mUnited Airlines

Fri 2/69:05 pmHND - DEC

2 stops35h 56mUnited Airlines

Deal found 12/16

$965

Fri 1/307:09 pmDEC - NRT

2 stops28h 51mUnited Airlines

Fri 2/65:05 pmNRT - DEC

1 stop15h 56mUnited Airlines

Deal found 12/16

$1,076

Sat 1/317:09 pmDEC - HND

2 stops30h 21mUnited Airlines

Sat 2/710:25 amHND - DEC

1 stop22h 36mUnited Airlines

Deal found 12/17

$1,075

Sat 1/317:09 pmDEC - NRT

1 stop28h 51mUnited Airlines

Sat 2/75:05 pmNRT - DEC

1 stop15h 56mUnited Airlines

Deal found 12/17

$1,077

Find flight deals from Decatur to Japan

Round-trip from	$960 (United Airlines)

From Decatur Arpt to Japan

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

DecaturTokyo

DEC - HND

DECHND

Decatur Arpt

Sun 2/1

9:49 am-9:05 pm

1 stop20h 16m

Tokyo Haneda

Sun 2/8

6:20 pm-6:01 pm

1 stop14h 41m

$960

DecaturTokyo

DEC - HND

DECHND

Decatur Arpt

Thu 1/15

9:49 am-5:45 pm

1 stop16h 56m

Tokyo Haneda

Thu 1/22

6:20 pm-6:01 pm

1 stop14h 41m

$960

DecaturTokyo

DEC - HND

DECHND

Decatur Arpt

Fri 1/30

9:49 am-5:45 pm

1 stop16h 56m

Tokyo Haneda

Fri 2/6

9:05 pm-6:01 pm

2 stops35h 56m

$965

DecaturTokyo

DEC - HND

DECHND

Decatur Arpt

Wed 1/21

7:09 pm-6:45 pm

2 stops56h 36m

Tokyo Haneda

Sun 1/25

6:20 pm-6:01 pm

1 stop14h 41m

$1,010

DecaturTokyo

DEC - NRT

DECNRT

Decatur Arpt

Wed 1/21

9:49 am-3:30 pm

2 stops38h 41m

Tokyo Narita

Sun 1/25

5:45 pm-9:05 am

2 stops30h 20m

$1,030

DecaturTokyo

DEC - NRT

DECNRT

Decatur Arpt

Sat 1/31

7:09 pm-3:55 pm

2 stops29h 46m

Tokyo Narita

Sat 2/7

5:05 pm-6:01 pm

1 stop15h 56m

$1,076

DecaturTokyo

DEC - NRT

DECNRT

Decatur Arpt

Fri 1/30

7:09 pm-3:00 pm

2 stops28h 51m

Tokyo Narita

Fri 2/6

5:05 pm-6:01 pm

1 stop15h 56m

$1,076

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Best time to book a flight from Decatur to Japan

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

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.

Cheapflights Insights

Everything you need to know about your flight from Decatur to Japan

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from Decatur to Japan?
If you book a flight to Japan from Decatur, you will be flying from Decatur Arpt, which is the city’s only airport. Decatur Arpt (DEC) is located 4.7 mi from the center of Decatur.
How long is the flight from Decatur, Illinois to Japan?
United Airlines can get you from Decatur, Illinois to Japan in just under 20h 16m. Your travel time can differ by up to . Airlines will cover a distance of 6374 mi.
Can I find deals for flights from Decatur to Japan that include hotel bookings?
Yes. In addition to deals on Decatur to Japan flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Decatur to Japan?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Decatur to Japan.
Can I find deals for business class flights from Decatur to Japan?
Yes. Cheapflights offers flight deals from Decatur to Japan 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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$960+ Cheap flights from Decatur, IL (DEC) to Japan

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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Decatur to Japan with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Decatur to Japan

Best flights from Decatur to JapanDiscover carefully curated flight deals from Decatur to Japan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Discover carefully curated flight deals from Decatur to Japan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Find flight deals from Decatur to Japan

Keep the following information in mind while searching for Decatur to Japan flight deals. Data was last updated December 18, 2025.

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Decatur to Japan that are best for you.

Best time to book a flight from Decatur to Japan

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

Cheapflights Insights

Everything you need to know about your flight from Decatur to Japan

Related info for your journey

Find useful and relevant information for your journey from Decatur to Japan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Decatur to Japan?

How long is the flight from Decatur, Illinois to Japan?

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

How can I find direct flights from Decatur to Japan?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Decatur to Japan

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Best flights from Decatur to Japan
Discover carefully curated flight deals from Decatur to Japan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.