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Cheap flights from Seattle to Decatur from $322

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Decatur departing on 8/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Decatur

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:00 pm - 7:09 am
SEA
-
DEC
6h 09m
1 stop
United Airlines Logo
9:12 am - 4:07 pm
DEC
-
SEA
8h 55m
1 stop
$514United Airlines
Sat, Aug 15 - Sun, Aug 16
United Airlines Logo
7:00 am - 5:59 pm
SEA
-
DEC
8h 59m
1 stop
United Airlines Logo
9:12 am - 4:07 pm
DEC
-
SEA
8h 55m
1 stop
$520United Airlines
Tue, Aug 11 - Sun, Aug 16
United Airlines Logo
11:00 pm - 7:37 am
SEA
-
DEC
6h 37m
1 stop
United Airlines Logo
9:12 am - 9:58 pm
DEC
-
SEA
14h 46m
2 stops
$530United Airlines
Wed, Aug 12 - Wed, Aug 19
United Airlines Logo
3:30 pm - 5:59 pm
SEA
-
DEC
24h 29m
2 stops
United Airlines Logo
9:12 am - 4:07 pm
DEC
-
SEA
8h 55m
1 stop
$534United Airlines
Tue, Aug 11 - Sun, Aug 16
United Airlines Logo
6:52 pm - 7:37 am
SEA
-
DEC
10h 45m
2 stops
United Airlines Logo
9:12 am - 8:45 pm
DEC
-
SEA
13h 33m
2 stops
$535United Airlines
Wed, Aug 12 - Wed, Aug 19
United Airlines Logo
1:16 pm - 5:59 pm
SEA
-
DEC
26h 43m
2 stops
United Airlines Logo
9:12 am - 9:15 pm
DEC
-
SEA
14h 03m
2 stops
$539United Airlines
Tue, Aug 11 - Wed, Aug 19
United Airlines Logo
5:13 pm - 5:59 pm
SEA
-
DEC
22h 46m
1 stop
United Airlines Logo
9:12 am - 4:07 pm
DEC
-
SEA
8h 55m
1 stop
$549United Airlines
Fri, Aug 14 - Sun, Aug 16
United Airlines Logo
5:13 pm - 5:59 pm
SEA
-
DEC
22h 46m
1 stop
United Airlines Logo
9:12 am - 9:58 pm
DEC
-
SEA
14h 46m
2 stops
$559United Airlines
Fri, Aug 14 - Wed, Aug 19
United Airlines Logo
3:54 pm - 5:59 pm
SEA
-
DEC
24h 05m
2 stops
United Airlines Logo
9:12 am - 8:45 pm
DEC
-
SEA
13h 33m
2 stops
$564United Airlines
Fri, Aug 14 - Wed, Aug 19
United Airlines Logo
6:30 am - 7:09 am
SEA
-
DEC
22h 39m
3 stops
United Airlines Logo
9:12 am - 6:29 pm
DEC
-
SEA
11h 17m
2 stops
$565United Airlines
Tue, Aug 11 - Wed, Aug 19

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United Airlines flights from Seattle to Decatur, Illinois

Our best United Airlines deals on Seattle to Decatur, Illinois flight tickets
United Airlines
Aug 15
SEA11:00 pmSeattle/Tacoma Intl
6h 09m
1 stop
DEC7:09 amDecatur Arpt
Aug 16
DEC9:12 amDecatur Arpt
8h 55m
1 stop
SEA4:07 pmSeattle/Tacoma Intl
$514
United Airlines
Aug 11
SEA7:00 amSeattle/Tacoma Intl
8h 59m
1 stop
DEC5:59 pmDecatur Arpt
Aug 16
DEC9:12 amDecatur Arpt
8h 55m
1 stop
SEA4:07 pmSeattle/Tacoma Intl
$520
United Airlines
Aug 12
SEA11:00 pmSeattle/Tacoma Intl
6h 37m
1 stop
DEC7:37 amDecatur Arpt
Aug 19
DEC9:12 amDecatur Arpt
14h 46m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$530

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Decatur, Illinois 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, momondo users made 832,500 searches. Data last updated June 29, 2026.
Use the filters below to find and compare flights from Seattle to Decatur, Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Sat 8/15

11:00 pm-7:09 am

1 stop6h 09m

Decatur Arpt

Sun 8/16

9:12 am-4:07 pm

1 stop8h 55m

$514

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 8/11

7:00 am-5:59 pm

1 stop8h 59m

Decatur Arpt

Sun 8/16

9:12 am-4:07 pm

1 stop8h 55m

$520

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 8/12

11:00 pm-7:37 am

1 stop6h 37m

Decatur Arpt

Wed 8/19

9:12 am-9:58 pm

2 stops14h 46m

$530

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 8/11

3:30 pm-5:59 pm

2 stops24h 29m

Decatur Arpt

Sun 8/16

9:12 am-4:07 pm

1 stop8h 55m

$534

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Wed 8/12

6:52 pm-7:37 am

2 stops10h 45m

Decatur Arpt

Wed 8/19

9:12 am-8:45 pm

2 stops13h 33m

$535

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 8/11

1:16 pm-5:59 pm

2 stops26h 43m

Decatur Arpt

Wed 8/19

9:12 am-9:15 pm

2 stops14h 03m

$539

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Fri 8/14

5:13 pm-5:59 pm

1 stop22h 46m

Decatur Arpt

Sun 8/16

9:12 am-4:07 pm

1 stop8h 55m

$549

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Fri 8/14

5:13 pm-5:59 pm

1 stop22h 46m

Decatur Arpt

Wed 8/19

9:12 am-9:58 pm

2 stops14h 46m

$559

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Fri 8/14

3:54 pm-5:59 pm

2 stops24h 05m

Decatur Arpt

Wed 8/19

9:12 am-8:45 pm

2 stops13h 33m

$564

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

Tue 8/11

6:30 am-7:09 am

3 stops22h 39m

Decatur Arpt

Wed 8/19

9:12 am-6:29 pm

2 stops11h 17m

$565

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Decatur from

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

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 Seattle/Tacoma Intl to Decatur Arpt?

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

When to book flights from Seattle to Decatur, Illinois

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

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

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

Fastest flight time

22h 46m

Direct flights

None
The fastest flight from Seattle to Decatur, Illinois takes 22h 46m
There are no direct flights from Seattle to Decatur, Illinois. There are no popular flight routes from Seattle to Decatur, Illinois.
Search flight deals

Frequently asked questions about flying from Seattle to Decatur, Illinois

  • How far is Seattle/Tacoma Intl to Decatur Arpt by plane?

    The straight-line distance from Seattle/Tacoma Intl to Decatur Arpt is 1734.6 mi. A reasonable flight in good conditions will take 22h 46m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Decatur Arpt Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Decatur Arpt Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Decatur Arpt Airport.

  • What documentation or ID do you need to fly to Decatur Arpt Airport?

    The necessary travel and health documents for your Decatur Arpt Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Decatur, Illinois?

Best airlines flying from Seattle to Decatur, Illinois

Compare and see reviews for airlines that fly from Seattle to Decatur, Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $304Free CancellationRating
7.4
9,899 reviews
Search United Airlines flights

Traveling to a place near Decatur?

Book flights to Decatur if you plan to visit one of these locations
Effingham
Mattoon
Forsyth

Why use momondo?

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

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

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

Yes. momondo enables you to select and highlight flights to Decatur from Seattle with this policy.

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

Once you have performed a search for Seattle to Decatur flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Seattle to Decatur now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Decatur and let you know when they change.

An easier way to manage your Decatur, Illinois trip

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