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$352+ Cheap flights from Decatur, IL (DEC) to Washington

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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SEA
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$420
(United Airlines)

One-way from

$352
(United Airlines)
From Decatur Arpt to Washington
Search Deals
One-way flight from Decatur Arpt to Washington
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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 July 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 11/187:08 pmDEC - PDX
1 stop25h 32mUnited Airlines
Sat 11/2211:59 pmPDX - DEC
1 stop6h 49mUnited Airlines
Deal found 7/30$420
This United Airlines deal was found by Cheapflights users on 7/29. 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 11/209:49 amDEC - SEA
2 stops14h 41mUnited Airlines
Wed 11/265:20 pmSEA - DEC
2 stops13h 28mUnited Airlines
Deal found 7/29$485

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 July 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

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Tue 11/18

7:08 pm-6:40 pm

1 stop25h 32m

Portland

Sat 11/22

11:59 pm-8:48 am

1 stop6h 49m

$420

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 10/24

9:38 am-3:45 pm

1 stop8h 07m

Seattle/Tacoma Intl

Sun 10/26

11:59 pm-8:48 am

1 stop6h 49m

$425

DecaturPortland

DEC - PDX

DECPDX

Decatur Arpt

Fri 8/15

6:55 pm-11:43 am

1 stop18h 48m

$352

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 8/8

9:45 am-6:58 pm

1 stop11h 13m

$421

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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 $389). 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.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown United Airlines from Decatur to Washington. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,896 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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.

  • 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 $389). 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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