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$334+ Cheap flights from Decatur, IL (DEC) to Washington

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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SEA
oct. 15 — oct. 221
mer. 10/15
mer. 10/22
1 adult, Economy
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Cheap flight deals from Decatur to Washington

Keep the following information in mind while searching for Decatur to Washington flight deals. Data was last updated septembre 15, 2025.

Round-trip from

$334
(United Airlines)
From Decatur Arpt to Washington
Search Deals

Find flight deals from Decatur to Washington

Cheapest flights from Decatur to Washington
Explore the most affordable flight options available from Decatur to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septembre 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 9/309:38 amDEC - SEA
1 stop8h 07mUnited Airlines
sam. 10/411:40 pmSEA - DEC
1 stop7h 11mUnited Airlines
Deal found 9/15$334
This United Airlines deal was found by Cheapflights users on 9/15. 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.
lun. 10/136:55 pmDEC - PDX
1 stop22h 35mUnited Airlines
lun. 10/2011:59 pmPDX - DEC
1 stop6h 52mUnited Airlines
Deal found 9/15$421
This United Airlines deal was found by Cheapflights users on 9/14. 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.
mar. 9/309:38 amDEC - PDX
1 stop7h 52mUnited Airlines
sam. 10/411:59 pmPDX - DEC
1 stop6h 52mUnited Airlines
Deal found 9/14$424
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 11/187:08 pmDEC - PDX
1 stop18h 40mUnited Airlines
sam. 11/224:02 pmPDX - DEC
2 stops14h 46mUnited Airlines
Deal found 9/15$486
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 10/79:38 amDEC - PDX
1 stop15h 02mUnited Airlines
jeu. 10/92:15 pmPDX - DEC
1 stop25h 49mUnited Airlines
Deal found 9/15$539

Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to Washington 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 septembre 15, 2025.
Use the filters below to find and compare flights from Decatur to Washington that are best for you.

Fly from

Decatur

Fly to

Washington

Route

Depart

Return

Price

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

mar. 9/30

9:38 am-3:45 pm

1 stop8h 07m

Seattle/Tacoma Intl

sam. 10/4

11:40 pm-8:51 am

1 stop7h 11m

$334

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

mer. 3/4

9:49 am-10:13 pm

2 stops14h 24m

Seattle/Tacoma Intl

dim. 3/8

6:31 am-2:31 pm

1 stop6h 00m

$384

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

lun. 10/13

6:55 pm-3:30 pm

1 stop22h 35m

Portland

lun. 10/20

11:59 pm-8:51 am

1 stop6h 52m

$421

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

mar. 9/30

9:38 am-3:30 pm

1 stop7h 52m

Portland

sam. 10/4

11:59 pm-8:51 am

1 stop6h 52m

$424

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

mar. 3/3

7:09 pm-6:05 pm

1 stop24h 56m

Portland

sam. 3/7

11:55 pm-9:51 am

1 stop7h 56m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Best time to book a flight from Decatur to Washington

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

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

Currently, January is the cheapest month in which you can book a flight from Decatur, Illinois to State of Washington (average of $238). Flying from Decatur, Illinois to State of Washington in June is currently the most expensive (average of $387). 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 Decatur to Washington. 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 Washington?

    Most people fly from Decatur Arpt (DEC) if they book a flight from Decatur to Washington. Decatur Arpt is conveniently located just 4.7 mi from Decatur’s city center.

  • How long is the flight from Decatur, Illinois to State of Washington?

    Departing from Decatur, Illinois to State of Washington will take you 8h 07m. The distance between Decatur, Illinois and State of Washington is about 1736 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Decatur to Washington 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 Decatur, Illinois to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Decatur, Illinois to State of Washington (average of $238). Flying from Decatur, Illinois to State of Washington in June is currently the most expensive (average of $387). 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.

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