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$316+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This United Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 12/49:49 amDEC - SEA
2 stops13h 57mUnited Airlines
Wed 12/107:00 amSEA - DEC
1 stop8h 52mUnited Airlines
Deal found 10/28$316
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 12/149:49 amDEC - SEA
1 stop8h 18mUnited Airlines
Sun 12/2111:59 pmSEA - DEC
1 stop7h 06mUnited Airlines
Deal found 10/30$374
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Fri 11/149:44 amDEC - PDX
2 stops13h 42mUnited Airlines
Tue 11/187:00 amPDX - DEC
1 stop8h 52mUnited Airlines
Deal found 10/30$454
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 12/199:44 amDEC - PDX
1 stop14h 56mUnited Airlines
Sun 12/2811:55 pmPDX - DEC
1 stop7h 10mUnited Airlines
Deal found 10/29$460
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Tue 11/187:08 pmDEC - PDX
1 stop29h 27mUnited Airlines
Sat 11/224:02 pmPDX - DEC
2 stops14h 46mUnited Airlines
Deal found 10/29$490
This United Airlines deal was found by Cheapflights users on 10/30. 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 12/207:09 pmDEC - PDX
1 stop29h 31mUnited Airlines
Sat 12/2712:54 pmPDX - DEC
2 stops18h 11mUnited Airlines
Deal found 10/30$520
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Sun 11/237:08 pmDEC - SEA
1 stop16h 42mUnited Airlines
Fri 11/2810:53 amSEA - DEC
1 stop28h 59mUnited Airlines
Deal found 10/30$530
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 12/199:44 amDEC - PDX
1 stop14h 56mUnited Airlines
Sat 12/2711:55 pmPDX - DEC
1 stop7h 10mUnited Airlines
Deal found 10/29$571

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 October 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$316
(United Airlines)
Provider with most accurate pricing for Decatur Arpt-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Decatur Arpt-Seattle/Tacoma Intl flights.
Search Deals
From Decatur Arpt to Washington
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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 October 30, 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

Thu 12/4

9:49 am-9:46 pm

2 stops13h 57m

Seattle/Tacoma Intl

Wed 12/10

7:00 am-5:52 pm

1 stop8h 52m

$316

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sun 12/14

9:49 am-4:07 pm

1 stop8h 18m

Seattle/Tacoma Intl

Sun 12/21

11:59 pm-9:05 am

1 stop7h 06m

$374

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 3/4

9:50 am-8:56 pm

2 stops13h 06m

Seattle/Tacoma Intl

Sun 3/8

11:59 pm-8:52 am

1 stop6h 53m

$384

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Fri 3/6

7:09 pm-10:16 pm

1 stop29h 07m

Portland

Tue 3/10

7:11 am-5:56 pm

1 stop8h 45m

$414

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Fri 11/14

9:44 am-9:26 pm

2 stops13h 42m

Portland

Tue 11/18

7:00 am-5:52 pm

1 stop8h 52m

$454

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Fri 12/19

9:44 am-10:40 pm

1 stop14h 56m

Portland

Sun 12/28

11:55 pm-9:05 am

1 stop7h 10m

$460

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Tue 11/18

7:08 pm-10:35 pm

1 stop29h 27m

Portland

Sat 11/22

4:02 pm-8:48 am

2 stops14h 46m

$490

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Sat 12/20

7:09 pm-10:40 pm

1 stop29h 31m

Portland

Sat 12/27

12:54 pm-9:05 am

2 stops18h 11m

$520

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Tue 12/30

7:09 pm-7:01 pm

1 stop25h 52m

$385

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

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, October is the cheapest month in which you can book a flight from Decatur, Illinois to State of Washington (average of $239). Flying from Decatur, Illinois to State of Washington in July is currently the most expensive (average of $360). 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 13h 57m. 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, October is the cheapest month in which you can book a flight from Decatur, Illinois to State of Washington (average of $239). Flying from Decatur, Illinois to State of Washington in July is currently the most expensive (average of $360). 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

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