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.

$344 Cheap Flights from Decatur to Seattle in 2026

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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.

7:37 pm - 12:34 am

DEC

SEA

6h 57m

1 stop

11:59 pm - 8:58 am

SEA

DEC

6h 59m

1 stop

$344United Airlines

Fri, Apr 17 - Tue, Apr 21

7:37 pm - 12:34 am

DEC

SEA

6h 57m

1 stop

7:37 pm - 8:58 am

SEA

DEC

11h 21m

2 stops

$354United Airlines

Fri, Apr 17 - Tue, Apr 21

7:37 pm - 7:00 pm

DEC

SEA

25h 23m

1 stop

2:28 pm - 8:58 am

SEA

DEC

16h 30m

1 stop

$398United Airlines

Tue, Apr 28 - Sat, May 2

7:37 pm - 10:42 pm

DEC

SEA

29h 05m

1 stop

11:39 am - 8:58 am

SEA

DEC

19h 19m

2 stops

$404United Airlines

Tue, Apr 28 - Sat, May 2

9:52 am - 8:57 pm

DEC

SEA

13h 05m

2 stops

5:45 pm - 8:58 am

SEA

DEC

13h 13m

2 stops

$417United Airlines

Fri, Apr 17 - Tue, Apr 21

7:37 pm - 7:00 pm

DEC

SEA

25h 23m

1 stop

2:28 pm - 5:58 pm

SEA

DEC

25h 30m

1 stop

$454United Airlines

Tue, Apr 28 - Sat, May 2

7:37 pm - 10:42 pm

DEC

SEA

29h 05m

1 stop

11:39 am - 5:58 pm

SEA

DEC

28h 19m

2 stops

$460United Airlines

Tue, Apr 28 - Sat, May 2

7:05 pm - 11:59 pm

DEC

SEA

6h 54m

1 stop

10:40 pm - 8:57 am

SEA

DEC

8h 17m

1 stop

$461United Airlines

Wed, Jun 10 - Sun, Jun 14

7:37 pm - 7:45 pm

DEC

SEA

26h 08m

2 stops

3:40 pm - 5:58 pm

SEA

DEC

24h 18m

2 stops

$469United Airlines

Tue, Apr 28 - Sat, May 2

7:37 pm - 10:42 pm

DEC

SEA

29h 05m

1 stop

2:28 pm - 8:58 am

SEA

DEC

16h 30m

1 stop

$474United Airlines

Tue, Apr 28 - Sat, May 2

United Airlines flights from Decatur, Illinois to Seattle

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

United Airlines

Apr 17

DEC7:37 pmDecatur Arpt

6h 57m

1 stop

SEA12:34 amSeattle/Tacoma Intl

Apr 21

SEA11:59 pmSeattle/Tacoma Intl

6h 59m

1 stop

DEC8:58 amDecatur Arpt

$344

United Airlines

Apr 17

DEC7:37 pmDecatur Arpt

6h 57m

1 stop

SEA12:34 amSeattle/Tacoma Intl

Apr 21

SEA7:37 pmSeattle/Tacoma Intl

11h 21m

2 stops

DEC8:58 amDecatur Arpt

$354

United Airlines

Apr 28

DEC7:37 pmDecatur Arpt

25h 23m

1 stop

SEA7:00 pmSeattle/Tacoma Intl

May 2

SEA2:28 pmSeattle/Tacoma Intl

16h 30m

1 stop

DEC8:58 amDecatur Arpt

$398

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 4/17

7:37 pm-12:34 am

1 stop6h 57m

Seattle/Tacoma Intl

Tue 4/21

11:59 pm-8:58 am

1 stop6h 59m

$344

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 4/17

7:37 pm-12:34 am

1 stop6h 57m

Seattle/Tacoma Intl

Tue 4/21

7:37 pm-8:58 am

2 stops11h 21m

$354

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-7:00 pm

1 stop25h 23m

Seattle/Tacoma Intl

Sat 5/2

2:28 pm-8:58 am

1 stop16h 30m

$398

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-10:42 pm

1 stop29h 05m

Seattle/Tacoma Intl

Sat 5/2

11:39 am-8:58 am

2 stops19h 19m

$404

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Fri 4/17

9:52 am-8:57 pm

2 stops13h 05m

Seattle/Tacoma Intl

Tue 4/21

5:45 pm-8:58 am

2 stops13h 13m

$417

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-7:00 pm

1 stop25h 23m

Seattle/Tacoma Intl

Sat 5/2

2:28 pm-5:58 pm

1 stop25h 30m

$454

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-10:42 pm

1 stop29h 05m

Seattle/Tacoma Intl

Sat 5/2

11:39 am-5:58 pm

2 stops28h 19m

$460

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Wed 6/10

7:05 pm-11:59 pm

1 stop6h 54m

Seattle/Tacoma Intl

Sun 6/14

10:40 pm-8:57 am

1 stop8h 17m

$461

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-7:45 pm

2 stops26h 08m

Seattle/Tacoma Intl

Sat 5/2

3:40 pm-5:58 pm

2 stops24h 18m

$469

DecaturSeattle

DEC - SEA

DECSEA

Decatur Arpt

Tue 4/28

7:37 pm-10:42 pm

1 stop29h 05m

Seattle/Tacoma Intl

Sat 5/2

2:28 pm-8:58 am

1 stop16h 30m

$474

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	6h 54m
Direct flights	None

The fastest flight from Decatur, Illinois to Seattle takes 6h 54m

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 6h 54m 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.

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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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.