HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Decatur

$263+ Cheap flights from Washington to Decatur, IL (DEC)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEC
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Decatur with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Decatur

Cheapest flights from Washington to Decatur
Explore the most affordable flight options available from Washington to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSEA - DEC
1 stop8h 59mUnited Airlines
Mon 1/59:44 amDEC - SEA
2 stops13h 33mUnited Airlines
Deal found 12/16$486
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 amSEA - DEC
1 stop8h 59mUnited Airlines
Sun 1/47:09 pmDEC - SEA
1 stop25h 37mUnited Airlines
Deal found 12/15$489
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:10 amPDX - DEC
1 stop8h 49mUnited Airlines
Thu 1/89:49 amDEC - PDX
2 stops13h 23mUnited Airlines
Deal found 12/17$509
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:35 pmPDX - DEC
2 stops25h 24mUnited Airlines
Sun 1/47:09 pmDEC - PDX
1 stop29h 31mUnited Airlines
Deal found 12/15$510
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:12 pmSEA - DEC
2 stops20h 47mUnited Airlines
Sun 1/47:09 pmDEC - SEA
1 stop29h 38mUnited Airlines
Deal found 12/15$514
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:59 pmSEA - DEC
1 stop7h 06mUnited Airlines
Sun 1/47:09 pmDEC - SEA
1 stop29h 38mUnited Airlines
Deal found 12/16$565

Find flight deals from Washington to Decatur

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

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$394
(United Airlines)

One-way from

$263
(United Airlines)
Provider with most accurate pricing for Seattle/Tacoma Intl-Decatur Arpt flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Decatur Arpt flights.
Search Deals
From Washington to Decatur Arpt
Search Deals
One-way flight from Washington to Decatur Arpt
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Decatur that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Washington to Decatur that are best for you.

Fly from

Washington

Fly to

Decatur

Route

Depart

Return

Price

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 2/4

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Sun 2/8

9:49 am-4:01 pm

1 stop8h 12m

$394

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 1/6

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Sun 1/11

9:49 am-4:01 pm

1 stop8h 12m

$394

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 1/28

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Sat 1/31

7:09 pm-4:01 pm

1 stop22h 52m

$404

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 1/6

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Sat 1/10

7:09 pm-10:43 pm

1 stop29h 34m

$404

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Sat 1/17

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Wed 1/21

9:49 am-6:56 pm

2 stops11h 07m

$404

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 1/14

5:00 am-6:01 pm

2 stops11h 01m

Decatur Arpt

Fri 1/16

9:49 am-11:32 am

1 stop27h 43m

$430

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Wed 12/31

2:35 pm-5:59 pm

2 stops25h 24m

Decatur Arpt

Sun 1/4

7:09 pm-10:40 pm

1 stop29h 31m

$510

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Mon 2/9

11:59 pm-6:01 pm

1 stop16h 02m

Decatur Arpt

Thu 2/12

7:15 pm-6:49 pm

1 stop25h 34m

$546

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 4/15

11:44 am-8:51 am

2 stops19h 07m

$268

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 12/30

6:45 am-9:05 am

2 stops24h 20m

$296

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 11 results
1
2

Best time to book a flight from Washington to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from Washington 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 Washington to Decatur

What is the cheapest month to book a flight from State of Washington to Decatur, Illinois?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Decatur, Illinois (average of $220). Flying from State of Washington to Decatur, Illinois in July is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Washington to Decatur. 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 into for flights to Decatur from Washington?

    If you book a flight to Decatur from Washington, you will be flying to 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 State of Washington to Decatur, Illinois?

    A quick flight from State of Washington to Decatur, Illinois can take about 9h 01m. United Airlines provides one of the quickest options available for as low as $394. Airlines will cover a distance of 1736 mi.

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

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

  • How can I find direct flights from Washington to Decatur?

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

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

    Yes. Cheapflights offers flight deals from Washington 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.

  • What is the cheapest month to book a flight from State of Washington to Decatur, Illinois?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Decatur, Illinois (average of $220). Flying from State of Washington to Decatur, Illinois in July is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Decatur?

Book flights to Decatur if you plan to visit one of these locations
Mattoon
Effingham

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 Washington to Decatur

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to O'Hare Intl flights
John F Kennedy Intl to O'Hare Intl flights
LaGuardia to O'Hare Intl flights
Los Angeles to O'Hare Intl flights
Newark to O'Hare Intl flights
Dallas/Fort Worth to Midway flights
Boston to O'Hare Intl flights
Atlanta to O'Hare Intl flights
Denver to O'Hare Intl flights
Seattle to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Reagan-National to O'Hare Intl flights
Baltimore to O'Hare Intl flights
Philadelphia to O'Hare Intl flights
Sky Harbor Intl to O'Hare Intl flights
Atlanta to Midway flights
John F Kennedy Intl to Midway flights
Los Angeles to Midway flights
Love Field to O'Hare Intl flights
George Bush Intcntl to O'Hare Intl flights
Dulles Intl to O'Hare Intl flights
Ontario to O'Hare Intl flights
Hobby to O'Hare Intl flights
Austin to O'Hare Intl flights
Minneapolis to O'Hare Intl flights
Tampa to O'Hare Intl flights
Orlando to O'Hare Intl flights
Fort Lauderdale to O'Hare Intl flights
LaGuardia to Midway flights
Love Field to Midway flights
Hobby to Midway flights
Minneapolis to Midway flights
Charlotte to O'Hare Intl flights
Raleigh to O'Hare Intl flights
San Diego to O'Hare Intl flights
Denver to Midway flights
Santa Ana to O'Hare Intl flights
Miami to O'Hare Intl flights
Dulles Intl to Midway flights
Detroit to O'Hare Intl flights
Orlando to Midway flights
George Bush Intcntl to Midway flights
Philadelphia to Midway flights
Nashville to O'Hare Intl flights
Newark to St. Louis flights
Baltimore to Midway flights
Seattle to Midway flights
Cleveland to O'Hare Intl flights
Sky Harbor Intl to Midway flights
Denver to St. Louis flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.