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Decatur

$415+ Cheap flights from Seattle to Decatur, IL (SEA - DEC)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DEC
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap flight deals from Seattle to Decatur

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Decatur (DEC). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 11, 2025.

Round-trip from

$381
(United Airlines)
From Seattle/Tacoma Intl to Decatur Arpt
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Find flight deals from Seattle to Decatur

Cheapest flights from Seattle to Decatur
Explore the most affordable flight options available from Seattle to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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.
vie. 9/267:37 pmSEA - DEC
2 stops11h 14mUnited Airlines
mar. 9/309:38 amDEC - SEA
1 stop14h 52mUnited Airlines
Deal found 9/11$415
This United Airlines deal was found by Cheapflights users on 9/9. 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.
mié. 9/2411:54 pmSEA - DEC
1 stop6h 57mUnited Airlines
dom. 9/286:55 pmDEC - SEA
1 stop22h 50mUnited Airlines
Deal found 9/9$465
This United Airlines deal was found by Cheapflights users on 9/9. 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.
vie. 10/1011:10 pmSEA - DEC
2 stops31h 41mUnited Airlines
dom. 10/126:55 pmDEC - SEA
1 stop16h 48mUnited Airlines
Deal found 9/9$496

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 septiembre 11, 2025.
Use the filters below to find and compare flights from Seattle to Decatur that are best for you.

Fly from

Seattle

Fly to

Decatur

Route

Depart

Return

Price

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

vie. 9/26

7:37 pm-8:51 am

2 stops11h 14m

Decatur Arpt

mar. 9/30

9:38 am-10:30 pm

1 stop14h 52m

$415

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mié. 9/24

11:54 pm-8:51 am

1 stop6h 57m

Decatur Arpt

dom. 9/28

6:55 pm-3:45 pm

1 stop22h 50m

$465

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

vie. 10/10

11:10 pm-8:51 am

2 stops31h 41m

Decatur Arpt

dom. 10/12

6:55 pm-9:43 am

1 stop16h 48m

$496

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from Seattle to Decatur

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

Reviews of airlines servicing Decatur

Get insights into the airlines that provide service to Decatur. 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 Decatur. Reviews last updated septiembre 11, 2025.
Read through reviews of airlines operating flights from Seattle to Decatur, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Crew

8.1

Boarding

7.7

Entertainment

7.1

Overall

7.4

Food

6.6

Comfort

7.3

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 Seattle to Decatur. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Decatur, Illinois?

    A quick flight from Seattle to Decatur, Illinois can take about 11h 14m. United Airlines provides one of the quickest options available for as low as $415. The distance from Seattle to Decatur, Illinois is about 1736 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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.

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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Alternative routes for Seattle to Decatur

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Seattle to Decatur

Discover the top airline that operate flights from Seattle to Decatur. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$424Average$764FlexibilityNo cancel feeOn-time69%

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