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

Search flight deals from Decatur, Illinois to Seattle . While viewing offers you’ll have the option to create a Price Alert.

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

With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

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 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.

$414 Cheap Flights from Decatur, Illinois to Seattle in 2026

1 adult

0 bags

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.

7:25 pm - 11:59 pm

DEC

SEA

6h 34m

1 stop

7:00 am - 5:57 pm

SEA

DEC

8h 57m

1 stop

$414United Airlines

Fri, May 15 - Tue, May 19

7:25 pm - 11:59 pm

DEC

SEA

6h 34m

1 stop

4:32 pm - 8:58 am

SEA

DEC

14h 26m

2 stops

$424United Airlines

Fri, May 15 - Tue, May 19

9:37 am - 7:18 pm

DEC

SEA

11h 41m

2 stops

11:52 pm - 8:57 am

SEA

DEC

7h 05m

1 stop

$470United Airlines

Wed, May 27 - Tue, Jun 2

9:37 am - 7:18 pm

DEC

SEA

11h 41m

2 stops

5:04 pm - 8:57 am

SEA

DEC

13h 53m

2 stops

$479United Airlines

Wed, May 27 - Tue, Jun 2

7:05 pm - 3:39 pm

DEC

SEA

22h 34m

1 stop

10:40 pm - 8:57 am

SEA

DEC

8h 17m

1 stop

$533United Airlines

Wed, May 27 - Tue, Jun 2

7:05 pm - 10:08 pm

DEC

SEA

29h 03m

3 stops

5:04 pm - 8:57 am

SEA

DEC

13h 53m

2 stops

$554United Airlines

Wed, May 27 - Tue, Jun 2

7:05 pm - 11:59 pm

DEC

SEA

6h 54m

1 stop

11:52 pm - 8:57 am

SEA

DEC

7h 05m

1 stop

$564United Airlines

Wed, Jun 10 - Wed, Jun 17

9:42 am - 9:58 pm

DEC

SEA

14h 16m

2 stops

7:36 pm - 8:58 am

SEA

DEC

11h 22m

2 stops

$570United Airlines

Fri, May 15 - Tue, May 19

6:55 pm - 3:36 pm

DEC

SEA

22h 41m

1 stop

5:00 pm - 5:51 pm

SEA

DEC

22h 51m

1 stop

$602United Airlines

Sun, Aug 23 - Fri, Sep 4

9:42 am - 10:42 pm

DEC

SEA

15h 00m

1 stop

5:00 am - 5:51 pm

SEA

DEC

10h 51m

2 stops

$738United Airlines

Sun, Aug 23 - Fri, Sep 4

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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

May 15

DEC7:25 pmDecatur Arpt

6h 34m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

May 19

SEA7:00 amSeattle/Tacoma Intl

8h 57m

1 stop

DEC5:57 pmDecatur Arpt

$414

United Airlines

May 15

DEC7:25 pmDecatur Arpt

6h 34m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

May 19

SEA4:32 pmSeattle/Tacoma Intl

14h 26m

2 stops

DEC8:58 amDecatur Arpt

$424

United Airlines

May 27

DEC9:37 amDecatur Arpt

11h 41m

2 stops

SEA7:18 pmSeattle/Tacoma Intl

Jun 2

SEA11:52 pmSeattle/Tacoma Intl

7h 05m

1 stop

DEC8:57 amDecatur Arpt

$470

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/15

7:25 pm-11:59 pm

1 stop6h 34m

Seattle/Tacoma Intl

Tue 5/19

7:00 am-5:57 pm

1 stop8h 57m

$414

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/15

7:25 pm-11:59 pm

1 stop6h 34m

Seattle/Tacoma Intl

Tue 5/19

4:32 pm-8:58 am

2 stops14h 26m

$424

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 5/27

9:37 am-7:18 pm

2 stops11h 41m

Seattle/Tacoma Intl

Tue 6/2

11:52 pm-8:57 am

1 stop7h 05m

$470

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 5/27

9:37 am-7:18 pm

2 stops11h 41m

Seattle/Tacoma Intl

Tue 6/2

5:04 pm-8:57 am

2 stops13h 53m

$479

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 5/27

7:05 pm-3:39 pm

1 stop22h 34m

Seattle/Tacoma Intl

Tue 6/2

10:40 pm-8:57 am

1 stop8h 17m

$533

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 5/27

7:05 pm-10:08 pm

3 stops29h 03m

Seattle/Tacoma Intl

Tue 6/2

5:04 pm-8:57 am

2 stops13h 53m

$554

Quickest round-trip

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 6/10

7:05 pm-11:59 pm

1 stop6h 54m

Seattle/Tacoma Intl

Wed 6/17

11:52 pm-8:57 am

1 stop7h 05m

$564

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 5/15

9:42 am-9:58 pm

2 stops14h 16m

Seattle/Tacoma Intl

Tue 5/19

7:36 pm-8:58 am

2 stops11h 22m

$570

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sun 8/23

6:55 pm-3:36 pm

1 stop22h 41m

Seattle/Tacoma Intl

Fri 9/4

5:00 pm-5:51 pm

1 stop22h 51m

$602

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Sun 8/23

9:42 am-10:42 pm

1 stop15h 00m

Seattle/Tacoma Intl

Fri 9/4

5:00 am-5:51 pm

2 stops10h 51m

$738

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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	22h 41m
Direct flights	None

The fastest flight from Decatur, Illinois to Seattle takes 22h 41m

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 22h 41m 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.

Frequently asked questions about flying from Decatur, Illinois to Seattle

How do I get Price Alerts for flights from Decatur, Illinois to Seattle?
Search flight deals from Decatur, Illinois to Seattle. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from Decatur, Illinois to Seattle with momondo?
With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.
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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Tumwater

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.