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Decatur

$332+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEC
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/29. 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 2/267:00 am
SEA
-
DEC
1 stop8h 54m
United Airlines
Thu 3/59:50 am
DEC
-
SEA
2 stops11h 38m
United Airlines
Deal found 1/29$404
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/1011:59 pm
PDX
-
DEC
1 stop6h 53m
United Airlines
Wed 4/89:52 am
DEC
-
PDX
2 stops13h 22m
United Airlines
Deal found 1/28$404
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/1011:59 pm
PDX
-
DEC
1 stop6h 53m
United Airlines
Mon 4/67:20 pm
DEC
-
PDX
1 stop18h 26m
United Airlines
Deal found 1/28$414
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/1011:59 pm
PDX
-
DEC
1 stop6h 53m
United Airlines
Tue 4/77:20 pm
DEC
-
PDX
1 stop29h 09m
United Airlines
Deal found 1/28$424
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/117:00 am
SEA
-
DEC
1 stop9h 01m
United Airlines
Wed 2/259:50 am
DEC
-
SEA
2 stops16h 01m
United Airlines
Deal found 1/27$429
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/107:49 pm
PDX
-
DEC
2 stops11h 03m
United Airlines
Sun 4/57:20 pm
DEC
-
PDX
1 stop29h 09m
United Airlines
Deal found 1/28$434
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Sat 3/1411:59 pm
PDX
-
DEC
1 stop15h 54m
United Airlines
Sun 4/57:20 pm
DEC
-
PDX
1 stop25h 14m
United Airlines
Deal found 1/28$444
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/1011:59 pm
PDX
-
DEC
1 stop6h 53m
United Airlines
Thu 4/99:52 am
DEC
-
PDX
1 stop7h 17m
United Airlines
Deal found 1/28$445
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/911:10 pm
PDX
-
DEC
2 stops31h 42m
United Airlines
Mon 4/69:52 am
DEC
-
PDX
1 stop27h 54m
United Airlines
Deal found 1/28$454
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/107:49 pm
PDX
-
DEC
2 stops11h 03m
United Airlines
Fri 4/109:52 am
DEC
-
PDX
1 stop7h 17m
United Airlines
Deal found 1/28$455
This United Airlines deal was found by Cheapflights users on 1/26. 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 10/287:11 am
PDX
-
DEC
1 stop8h 40m
United Airlines
Sat 10/316:55 pm
DEC
-
PDX
2 stops17h 45m
United Airlines
Deal found 1/26$459
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/97:49 pm
PDX
-
DEC
2 stops20h 04m
United Airlines
Sun 4/57:20 pm
DEC
-
PDX
1 stop25h 14m
United Airlines
Deal found 1/28$464

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$404
(United Airlines)

One-way from

$332
(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 January 29, 2026.
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

Thu 2/26

7:00 am-5:54 pm

1 stop8h 54m

Decatur Arpt

Thu 3/5

9:50 am-7:28 pm

2 stops11h 38m

$404

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Sun 3/15

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Wed 4/8

9:52 am-9:14 pm

2 stops13h 22m

$404

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Thu 3/12

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Wed 4/8

9:52 am-9:14 pm

2 stops13h 22m

$404

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Wed 3/11

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Mon 4/6

9:52 am-11:46 am

1 stop27h 54m

$414

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Sun 3/15

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Mon 4/6

9:52 am-11:46 am

1 stop27h 54m

$414

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Sun 3/15

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Tue 4/7

7:20 pm-10:29 pm

1 stop29h 09m

$424

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Wed 3/11

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Tue 4/7

7:20 pm-10:29 pm

1 stop29h 09m

$424

PortlandDecatur

PDX - DEC

PDXDEC

Portland

Tue 3/10

11:59 pm-8:52 am

1 stop6h 53m

Decatur Arpt

Wed 4/8

9:52 am-10:29 pm

1 stop14h 37m

$424

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 2/11

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Sun 2/15

9:50 am-8:56 pm

2 stops13h 06m

$429

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 2/11

7:00 am-6:01 pm

1 stop9h 01m

Decatur Arpt

Wed 2/25

9:50 am-11:51 pm

2 stops16h 01m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 17 results
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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 $353). 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 8h 54m. United Airlines provides one of the quickest options available for as low as $404. 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 $353). 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

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