When did momondo last update prices for flights from Decatur Arpt Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Decatur Arpt Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

How old do you have to be to fly from Decatur Arpt Airport to Seattle/Tacoma Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Decatur Arpt Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$411 Cheap Flights from Decatur, Illinois to Seattle in 2026/27

Find the cheapest flights from Decatur, Illinois to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:42 am - 4:16 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

8h 34m1 stop Chicago O'Hare Intl

7:00 am - 5:51 pmSEA Seattle/Tacoma Intl-DEC Decatur Arpt

8h 51m1 stop Chicago O'Hare Intl

$494United Airlines

Fri, Jan 29 - Tue, Feb 2

9:42 am - 8:10 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

12h 28m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

7:00 am - 5:51 pmSEA Seattle/Tacoma Intl-DEC Decatur Arpt

8h 51m1 stop Chicago O'Hare Intl

$500United Airlines

Fri, Jan 29 - Tue, Feb 2

9:42 am - 8:48 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

13h 06m2 stops Chicago O'Hare Intl San Francisco

5:30 pm - 8:46 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

13h 16m2 stops San Francisco Chicago O'Hare Intl

$509United Airlines

Fri, Jan 29 - Tue, Feb 2

9:42 am - 8:10 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

12h 28m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

3:51 pm - 8:46 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

14h 55m3 stops Denver Intl Los Angeles Chicago O'Hare Intl

$515United Airlines

Fri, Jan 29 - Tue, Feb 2

9:42 am - 11:31 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

15h 49m3 stops Chicago O'Hare Intl Denver Intl San Francisco

3:51 pm - 8:46 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

14h 55m3 stops Denver Intl Los Angeles Chicago O'Hare Intl

$520United Airlines

Fri, Jan 29 - Tue, Feb 2

9:12 am - 3:51 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

8h 39m1 stop Chicago O'Hare Intl

11:13 pm - 8:35 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

7h 22m1 stop Chicago O'Hare Intl

$564United Airlines

Fri, Oct 9 - Tue, Oct 13

6:57 pm - 9:58 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

29h 01m2 stops Chicago O'Hare Intl Los Angeles

7:00 am - 6:10 pmSEA Seattle/Tacoma Intl-DEC Decatur Arpt

9h 10m1 stop Chicago O'Hare Intl

$565United Airlines

Tue, Dec 1 - Sat, Dec 5

6:57 pm - 9:58 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

29h 01m2 stops Chicago O'Hare Intl Los Angeles

7:30 pm - 7:55 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

10h 25m2 stops San Francisco Chicago O'Hare Intl

$570United Airlines

Tue, Dec 1 - Sat, Dec 5

9:12 am - 7:29 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

12h 17m2 stops Chicago O'Hare Intl Los Angeles

11:13 pm - 8:35 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

7h 22m1 stop Chicago O'Hare Intl

$574United Airlines

Fri, Oct 9 - Tue, Oct 13

9:12 am - 7:29 pmDEC Decatur Arpt-SEA Seattle/Tacoma Intl

12h 17m2 stops Chicago O'Hare Intl Los Angeles

4:35 pm - 8:35 amSEA Seattle/Tacoma Intl-DEC Decatur Arpt

14h 00m2 stops Los Angeles Chicago O'Hare Intl

$579United Airlines

Fri, Oct 9 - Tue, Oct 13

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United Airlines flights from Decatur, Illinois to Seattle

Our best United Airlines deals on Decatur, Illinois to Seattle flight tickets

United Airlines

Jan 29

DEC9:42 amDecatur Arpt

8h 34m

1 stop

SEA4:16 pmSeattle/Tacoma Intl

Feb 2

SEA7:00 amSeattle/Tacoma Intl

8h 51m

1 stop

DEC5:51 pmDecatur Arpt

$494

United Airlines

Jan 29

DEC9:42 amDecatur Arpt

12h 28m

2 stops

SEA8:10 pmSeattle/Tacoma Intl

Feb 2

SEA7:00 amSeattle/Tacoma Intl

8h 51m

1 stop

DEC5:51 pmDecatur Arpt

$500

United Airlines

Jan 29

DEC9:42 amDecatur Arpt

13h 06m

2 stops

SEA8:48 pmSeattle/Tacoma Intl

Feb 2

SEA5:30 pmSeattle/Tacoma Intl

13h 16m

2 stops

DEC8:46 amDecatur Arpt

$509

momondo Fare Finder

Use the filters below to find and compare flights from Decatur, Illinois to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 1/29

9:42 am-4:16 pm

1 stop8h 34m

Seattle/Tacoma Intl

Tue 2/2

7:00 am-5:51 pm

1 stop8h 51m

$494

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 1/29

9:42 am-8:10 pm

2 stops12h 28m

Seattle/Tacoma Intl

Tue 2/2

7:00 am-5:51 pm

1 stop8h 51m

$500

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 1/29

9:42 am-8:48 pm

2 stops13h 06m

Seattle/Tacoma Intl

Tue 2/2

5:30 pm-8:46 am

2 stops13h 16m

$509

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 1/29

9:42 am-8:10 pm

2 stops12h 28m

Seattle/Tacoma Intl

Tue 2/2

3:51 pm-8:46 am

3 stops14h 55m

$515

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 1/29

9:42 am-11:31 pm

3 stops15h 49m

Seattle/Tacoma Intl

Tue 2/2

3:51 pm-8:46 am

3 stops14h 55m

$520

Quickest round-trip

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 10/9

9:12 am-3:51 pm

1 stop8h 39m

Seattle/Tacoma Intl

Tue 10/13

11:13 pm-8:35 am

1 stop7h 22m

$564

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Tue 12/1

6:57 pm-9:58 pm

2 stops29h 01m

Seattle/Tacoma Intl

Sat 12/5

7:00 am-6:10 pm

1 stop9h 10m

$565

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Tue 12/1

6:57 pm-9:58 pm

2 stops29h 01m

Seattle/Tacoma Intl

Sat 12/5

7:30 pm-7:55 am

2 stops10h 25m

$570

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 10/9

9:12 am-7:29 pm

2 stops12h 17m

Seattle/Tacoma Intl

Tue 10/13

11:13 pm-8:35 am

1 stop7h 22m

$574

DecaturSeattle

DEC Decatur Arpt - SEA Seattle/Tacoma Intl

DECSEA

Decatur Arpt

Fri 10/9

9:12 am-7:29 pm

2 stops12h 17m

Seattle/Tacoma Intl

Tue 10/13

4:35 pm-8:35 am

2 stops14h 00m

$579

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first

How to get the cheapest flight ticket from Decatur, Illinois to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Decatur Arpt to Seattle/Tacoma Intl?

United Airlines is the most popular carrier operating from Decatur Arpt to Seattle/Tacoma Intl

When to book flights from Decatur, Illinois to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Decatur, Illinois to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Decatur, Illinois to Seattle (DEC to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Decatur, Illinois to Seattle

Best Price Found	$411
Fastest flight time	8h 22m
Direct flights	None

The best one-way flight to Seattle from Decatur, Illinois in the past 72 hours is $411. The best round-trip flight deal from Decatur, Illinois to Seattle found on momondo in the last 72 hours is $494.

The fastest flight from Decatur, Illinois to Seattle takes 8h 22m

There are no direct flights from Decatur, Illinois to Seattle. There are no popular flight routes from Decatur, Illinois to Seattle.

Search flight deals

Frequently asked questions about flying from Decatur, Illinois to Seattle

How far is Decatur Arpt to Seattle/Tacoma Intl by plane?
A flight from Decatur Arpt to Seattle/Tacoma Intl will travel around 1734.6 mi. Typically, this will take 8h 22m by plane in normal conditions.
When did momondo last update prices for flights from Decatur Arpt Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Decatur Arpt Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Decatur Arpt Airport to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Decatur Arpt Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from Decatur to Seattle?

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Can I find flights from Decatur to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Decatur on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Decatur to Seattle?

Once all potential Decatur to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Decatur to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Decatur to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.