How do I get Price Alerts for flights from Seattle to Decatur, Illinois?

Confirm your travel details to search for the latest offers for flights from Seattle to Decatur, Illinois . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Seattle to Decatur, Illinois with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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?

There is 1 operator available for flights from Seattle/Tacoma Intl Airport to Decatur Arpt Airport as of September 2025.

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.

$306 Cheap Flights from Seattle to Decatur in 2025/26

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Find the cheapest flights from Seattle to Decatur

Round-trip

One-way

Cheap round-trip flights

11:50 pm - 8:52 amSEA-DEC

7h 02m1 stop

3:20 pm - 10:29 pmDEC-SEA

9h 09m1 stop

$374United Airlines

Find Deal

mar., mar. 3 - sáb., mar. 7

11:45 pm - 5:56 pmSEA-DEC

16h 11m2 stops

3:20 pm - 10:29 pmDEC-SEA

9h 09m1 stop

$384United Airlines

Find Deal

mar., mar. 3 - sáb., mar. 7

11:45 pm - 5:56 pmSEA-DEC

16h 11m2 stops

3:20 pm - 10:59 pmDEC-SEA

9h 39m2 stops

$389United Airlines

Find Deal

mar., mar. 3 - sáb., mar. 7

7:29 pm - 8:52 amSEA-DEC

11h 23m2 stops

3:20 pm - 10:59 pmDEC-SEA

9h 39m2 stops

$440United Airlines

Find Deal

mar., mar. 3 - sáb., mar. 7

8:17 am - 8:52 amSEA-DEC

22h 35m3 stops

3:20 pm - 10:59 pmDEC-SEA

9h 39m2 stops

$446United Airlines

Find Deal

mar., mar. 3 - sáb., mar. 7

7:00 am - 6:04 pmSEA-DEC

9h 04m1 stop

6:55 pm - 6:49 pmDEC-SEA

25h 54m1 stop

$461United Airlines

Find Deal

jue., oct. 2 - lun., oct. 6

11:40 pm - 8:51 amSEA-DEC

7h 11m1 stop

6:55 pm - 10:30 pmDEC-SEA

29h 35m1 stop

$465United Airlines

Find Deal

mié., oct. 1 - dom., oct. 5

7:00 am - 6:04 pmSEA-DEC

9h 04m1 stop

6:55 pm - 11:15 pmDEC-SEA

30h 20m2 stops

$466United Airlines

Find Deal

jue., oct. 2 - lun., oct. 6

5:31 pm - 8:51 amSEA-DEC

13h 20m2 stops

9:38 am - 9:43 amDEC-SEA

26h 05m1 stop

$475United Airlines

Find Deal

mié., oct. 1 - dom., oct. 5

5:26 pm - 8:51 amSEA-DEC

13h 25m2 stops

6:55 pm - 12:02 pmDEC-SEA

19h 07m2 stops

$476United Airlines

Find Deal

jue., oct. 2 - lun., oct. 6

United Airlines flights from Seattle to Decatur, Illinois

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

United Airlines

Mar 3

SEA11:50 pmSeattle/Tacoma Intl

7h 02m

1 stop

DEC8:52 amDecatur Arpt

Mar 7

DEC3:20 pmDecatur Arpt

9h 09m

1 stop

SEA10:29 pmSeattle/Tacoma Intl

$374

Find similar

United Airlines

Mar 3

SEA11:45 pmSeattle/Tacoma Intl

16h 11m

2 stops

DEC5:56 pmDecatur Arpt

Mar 7

DEC3:20 pmDecatur Arpt

9h 09m

1 stop

SEA10:29 pmSeattle/Tacoma Intl

$384

Find similar

United Airlines

Mar 3

SEA11:45 pmSeattle/Tacoma Intl

16h 11m

2 stops

DEC5:56 pmDecatur Arpt

Mar 7

DEC3:20 pmDecatur Arpt

9h 39m

2 stops

SEA10:59 pmSeattle/Tacoma Intl

$389

Find similar

momondo Fare Finder

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

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mar. 3/3

11:50 pm-8:52 am

1 stop7h 02m

Decatur Arpt

sáb. 3/7

3:20 pm-10:29 pm

1 stop9h 09m

$374

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mar. 3/3

11:45 pm-5:56 pm

2 stops16h 11m

Decatur Arpt

sáb. 3/7

3:20 pm-10:29 pm

1 stop9h 09m

$384

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mar. 3/3

11:45 pm-5:56 pm

2 stops16h 11m

Decatur Arpt

sáb. 3/7

3:20 pm-10:59 pm

2 stops9h 39m

$389

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mar. 3/3

7:29 pm-8:52 am

2 stops11h 23m

Decatur Arpt

sáb. 3/7

3:20 pm-10:59 pm

2 stops9h 39m

$440

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mar. 3/3

8:17 am-8:52 am

3 stops22h 35m

Decatur Arpt

sáb. 3/7

3:20 pm-10:59 pm

2 stops9h 39m

$446

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

jue. 10/2

7:00 am-6:04 pm

1 stop9h 04m

Decatur Arpt

lun. 10/6

6:55 pm-6:49 pm

1 stop25h 54m

$461

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mié. 10/1

11:40 pm-8:51 am

1 stop7h 11m

Decatur Arpt

dom. 10/5

6:55 pm-10:30 pm

1 stop29h 35m

$465

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

jue. 10/2

7:00 am-6:04 pm

1 stop9h 04m

Decatur Arpt

lun. 10/6

6:55 pm-11:15 pm

2 stops30h 20m

$466

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

mié. 10/1

5:31 pm-8:51 am

2 stops13h 20m

Decatur Arpt

dom. 10/5

9:38 am-9:43 am

1 stop26h 05m

$475

SeattleDecatur

SEA - DEC

SEADEC

Seattle/Tacoma Intl

jue. 10/2

5:26 pm-8:51 am

2 stops13h 25m

Decatur Arpt

lun. 10/6

6:55 pm-12:02 pm

2 stops19h 07m

$476

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Direct flights	None

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

Search flight deals

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 7h 02m.
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?
There is 1 operator available for flights from Seattle/Tacoma Intl Airport to Decatur Arpt Airport as of September 2025.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Decatur, Illinois is United Airlines (100% of total bookings).

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 Airlines	PriceFrom $424	Free Cancellation	Rating 7.4 8,926 reviews		Search United Airlines flights

How do I get Price Alerts for flights from Seattle to Decatur, Illinois?
Confirm your travel details to search for the latest offers for flights from Seattle to Decatur, Illinois. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Seattle to Decatur, Illinois with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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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.