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.

$361 Cheap Flights from Decatur to Seattle in 2025/26

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Find the cheapest flights from Decatur, Illinois to Seattle

Round-trip

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Cheap round-trip flights

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9:42 am - 4:25 pm

DEC

SEA

8h 43m1 stop

7:00 am - 5:51 pm

SEA

DEC

8h 51m1 stop

$394United Airlines

Wed, Apr 15 - Sat, Apr 18

7:15 pm - 10:43 pm

DEC

SEA

29h 28m1 stop

11:59 pm - 8:52 am

SEA

DEC

6h 53m1 stop

$404United Airlines

Sat, Feb 14 - Wed, Feb 18

9:42 am - 11:36 pm

DEC

SEA

15h 54m3 stops

11:59 pm - 8:51 am

SEA

DEC

6h 52m1 stop

$409United Airlines

Wed, Apr 15 - Sun, Apr 19

7:15 pm - 10:43 pm

DEC

SEA

29h 28m1 stop

7:29 pm - 8:52 am

SEA

DEC

11h 23m2 stops

$414United Airlines

Sat, Feb 14 - Wed, Feb 18

7:15 pm - 11:30 pm

DEC

SEA

30h 15m2 stops

5:20 pm - 8:52 am

SEA

DEC

13h 32m2 stops

$439United Airlines

Sat, Feb 14 - Wed, Feb 18

6:55 pm - 10:00 am

DEC

SEA

17h 05m1 stop

11:50 pm - 8:46 am

SEA

DEC

6h 56m1 stop

$440United Airlines

Fri, May 29 - Sat, Jun 6

6:55 pm - 10:18 pm

DEC

SEA

29h 23m2 stops

11:50 pm - 8:46 am

SEA

DEC

6h 56m1 stop

$450United Airlines

Fri, May 29 - Sat, Jun 6

9:42 am - 8:48 pm

DEC

SEA

13h 06m2 stops

11:59 pm - 5:51 pm

SEA

DEC

15h 52m2 stops

$455United Airlines

Fri, May 29 - Sat, Jun 6

9:42 am - 11:21 pm

DEC

SEA

15h 39m3 stops

11:50 pm - 8:46 am

SEA

DEC

6h 56m1 stop

$460United Airlines

Fri, May 29 - Sat, Jun 6

9:42 am - 11:21 pm

DEC

SEA

15h 39m3 stops

1:20 pm - 8:46 am

SEA

DEC

17h 26m2 stops

$511United Airlines

Fri, May 29 - Sat, Jun 6

United Airlines flights from Decatur, Illinois to Seattle

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

United Airlines

Apr 15

DEC9:42 amDecatur Arpt

8h 43m

1 stop

SEA4:25 pmSeattle/Tacoma Intl

Apr 18

SEA7:00 amSeattle/Tacoma Intl

8h 51m

1 stop

DEC5:51 pmDecatur Arpt

$394

Find similar

United Airlines

Feb 14

DEC7:15 pmDecatur Arpt

29h 28m

1 stop

SEA10:43 pmSeattle/Tacoma Intl

Feb 18

SEA11:59 pmSeattle/Tacoma Intl

6h 53m

1 stop

DEC8:52 amDecatur Arpt

$404

Find similar

United Airlines

Apr 15

DEC9:42 amDecatur Arpt

15h 54m

3 stops

SEA11:36 pmSeattle/Tacoma Intl

Apr 19

SEA11:59 pmSeattle/Tacoma Intl

6h 52m

1 stop

DEC8:51 amDecatur Arpt

$409

Find similar

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

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 4/15

9:42 am-4:25 pm

1 stop8h 43m

Seattle/Tacoma Intl

Sat 4/18

7:00 am-5:51 pm

1 stop8h 51m

$394

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sat 2/14

7:15 pm-10:43 pm

1 stop29h 28m

Seattle/Tacoma Intl

Wed 2/18

11:59 pm-8:52 am

1 stop6h 53m

$404

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 4/15

9:42 am-11:36 pm

3 stops15h 54m

Seattle/Tacoma Intl

Sun 4/19

11:59 pm-8:51 am

1 stop6h 52m

$409

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sat 2/14

7:15 pm-10:43 pm

1 stop29h 28m

Seattle/Tacoma Intl

Wed 2/18

7:29 pm-8:52 am

2 stops11h 23m

$414

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sat 2/14

7:15 pm-11:30 pm

2 stops30h 15m

Seattle/Tacoma Intl

Wed 2/18

5:20 pm-8:52 am

2 stops13h 32m

$439

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/29

6:55 pm-10:00 am

1 stop17h 05m

Seattle/Tacoma Intl

Sat 6/6

11:50 pm-8:46 am

1 stop6h 56m

$440

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/29

6:55 pm-10:18 pm

2 stops29h 23m

Seattle/Tacoma Intl

Sat 6/6

11:50 pm-8:46 am

1 stop6h 56m

$450

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/29

9:42 am-8:48 pm

2 stops13h 06m

Seattle/Tacoma Intl

Sat 6/6

11:59 pm-5:51 pm

2 stops15h 52m

$455

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/29

9:42 am-11:21 pm

3 stops15h 39m

Seattle/Tacoma Intl

Sat 6/6

11:50 pm-8:46 am

1 stop6h 56m

$460

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/29

9:42 am-11:21 pm

3 stops15h 39m

Seattle/Tacoma Intl

Sat 6/6

1:20 pm-8:46 am

2 stops17h 26m

$511

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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

Fastest flight time	8h 43m
Direct flights	None

The fastest flight from Decatur, Illinois to Seattle takes 8h 43m

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

Search flight deals

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 43m 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.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Decatur to Seattle. Millions of users trust and use momondo every year so you are in good hands.

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.