What is the cheapest airline that flies from Chicago O'Hare Intl to Seattle/Tacoma Intl?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Chicago O'Hare Intl to Seattle/Tacoma Intl

How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per day?

As of March 2026, 26 flights take off from Chicago O'Hare Intl Airport and land in Seattle each day. The most common flight departure time for this route is 8:00PM, with 54% of daily flights taking off in the evening.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Seattle?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 8h 11m.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Seattle?

Denver (DEN) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Seattle?

Flights via Denver (DEN) offer the lowest average round-trip price of $249.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Seattle?

Portland (PDX) has the shortest average layover time for this route: 2h 21m.

What airlines fly to Seattle?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Seattle from Chicago O'Hare Intl Airport according to our data. Alaska Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per week?

183 flights are operational weekly from Chicago O'Hare Intl Airport to Seattle as of March 2026. The most popular departure day for this route is Tue, with 19% of flights per week taking off on this day.

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

As of March 2026, there are 6 operators available to choose from for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport.

How old do you have to be to fly from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl 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.

$94 Cheap Flights from Chicago O'Hare Intl Airport to Seattle in 2026

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Find the cheapest flights from Chicago O'Hare Intl Airport to Seattle

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:42 pm - 9:49 am

ORD

SEA

14h 07m

1 stop

11:06 am - 5:35 am

SEA

ORD

16h 29m

1 stop

$184Multiple Airlines

Tue, May 12 - Sat, May 16

4:50 pm - 11:55 pm

ORD

SEA

9h 05m

1 stop

9:20 am - 10:55 pm

SEA

ORD

11h 35m

2 stops

$186Southwest

Wed, Apr 29 - Wed, May 6

4:50 pm - 11:55 pm

ORD

SEA

9h 05m

1 stop

8:25 am - 10:55 pm

SEA

ORD

12h 30m

1 stop

$187Southwest

Wed, Apr 29 - Wed, May 6

9:06 am - 11:48 am

ORD

SEA

4h 42mnonstop

11:59 pm - 5:59 am

SEA

ORD

4h 00mnonstop

$189United Airlines

Wed, Apr 22 - Mon, Apr 27

6:00 am - 8:37 am

ORD

SEA

4h 37mnonstop

12:35 am - 6:39 am

SEA

ORD

4h 04mnonstop

$191Alaska Airlines

Mon, Apr 13 - Sat, Apr 18

2:15 pm - 8:57 pm

ORD

SEA

8h 42m

1 stop

11:53 pm - 5:54 am

SEA

ORD

4h 01mnonstop

$192United Airlines

Sat, Apr 25 - Sat, May 2

4:03 pm - 9:27 am

ORD

SEA

43h 24m

2 stops

11:06 am - 6:39 am

SEA

ORD

17h 33m

1 stop

$193Multiple Airlines

Tue, Apr 28 - Tue, May 5

7:21 pm - 5:42 pm

ORD

SEA

24h 21m

1 stop

7:50 pm - 8:37 pm

SEA

ORD

22h 47m

1 stop

$196Frontier

Tue, Apr 28 - Tue, May 5

6:00 am - 8:37 am

ORD

SEA

4h 37mnonstop

12:42 pm - 12:38 am

SEA

ORD

9h 56m

1 stop

$198Multiple Airlines

Sat, Apr 4 - Sat, Apr 11

3:05 pm - 10:10 pm

ORD

SEA

9h 05m

1 stop

5:45 am - 2:20 pm

SEA

ORD

6h 35m

1 stop

$202Southwest

Sat, Apr 25 - Sat, May 2

Frontier flights from Chicago O'Hare Intl Airport to Seattle

Our best Frontier deals on Chicago O'Hare Intl Airport to Seattle flight tickets

Frontier

Apr 22

ORD7:21 pmChicago O'Hare Intl

24h 21m

1 stop

SEA5:42 pmSeattle/Tacoma Intl

Apr 28

SEA10:57 amSeattle/Tacoma Intl

16h 53m

1 stop

ORD5:50 amChicago O'Hare Intl

$203

Frontier

May 12

ORD9:42 pmChicago O'Hare Intl

14h 07m

1 stop

SEA9:49 amSeattle/Tacoma Intl

May 19

SEA11:06 amSeattle/Tacoma Intl

17h 33m

1 stop

ORD6:39 amChicago O'Hare Intl

$208

Frontier

Apr 28

ORD7:21 pmChicago O'Hare Intl

24h 21m

1 stop

SEA5:42 pmSeattle/Tacoma Intl

May 1

SEA11:07 amSeattle/Tacoma Intl

16h 43m

1 stop

ORD5:50 amChicago O'Hare Intl

$210

United Airlines flights from Chicago O'Hare Intl Airport to Seattle

Our best United Airlines deals on Chicago O'Hare Intl Airport to Seattle flight tickets

United Airlines

Apr 29

ORD1:18 pmChicago O'Hare Intl

8h 27m

1 stop

SEA7:45 pmSeattle/Tacoma Intl

May 6

SEA7:00 amSeattle/Tacoma Intl

4h 12m

ORD1:12 pmChicago O'Hare Intl

$192

United Airlines

Apr 17

ORD9:54 pmChicago O'Hare Intl

4h 40m

SEA12:34 amSeattle/Tacoma Intl

Apr 19

SEA10:35 pmSeattle/Tacoma Intl

4h 11m

ORD4:46 amChicago O'Hare Intl

$217

United Airlines

Apr 10

ORD9:54 pmChicago O'Hare Intl

4h 40m

SEA12:34 amSeattle/Tacoma Intl

Apr 15

SEA2:39 pmSeattle/Tacoma Intl

4h 11m

ORD8:50 pmChicago O'Hare Intl

$227

momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/12

9:42 pm-9:49 am

1 stop14h 07m

Seattle/Tacoma Intl

Sat 5/16

11:06 am-5:35 am

1 stop16h 29m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/29

4:50 pm-11:55 pm

1 stop9h 05m

Seattle/Tacoma Intl

Wed 5/6

9:20 am-10:55 pm

2 stops11h 35m

$186

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/29

4:50 pm-11:55 pm

1 stop9h 05m

Seattle/Tacoma Intl

Wed 5/6

8:25 am-10:55 pm

1 stop12h 30m

$187

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/22

9:06 am-11:48 am

Nonstop4h 42m

Seattle/Tacoma Intl

Mon 4/27

11:59 pm-5:59 am

Nonstop4h 00m

$189

Quickest round-trip

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 4/13

6:00 am-8:37 am

Nonstop4h 37m

Seattle/Tacoma Intl

Sat 4/18

12:35 am-6:39 am

Nonstop4h 04m

$191

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/25

2:15 pm-8:57 pm

1 stop8h 42m

Seattle/Tacoma Intl

Sat 5/2

11:53 pm-5:54 am

Nonstop4h 01m

$192

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 4/28

4:03 pm-9:27 am

2 stops43h 24m

Seattle/Tacoma Intl

Tue 5/5

11:06 am-6:39 am

1 stop17h 33m

$193

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 4/28

7:21 pm-5:42 pm

1 stop24h 21m

Seattle/Tacoma Intl

Tue 5/5

7:50 pm-8:37 pm

1 stop22h 47m

$196

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/4

6:00 am-8:37 am

Nonstop4h 37m

Seattle/Tacoma Intl

Sat 4/11

12:42 pm-12:38 am

1 stop9h 56m

$198

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/25

3:05 pm-10:10 pm

1 stop9h 05m

Seattle/Tacoma Intl

Sat 5/2

5:45 am-2:20 pm

1 stop6h 35m

$202

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport 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

Prices

Airlines

Layovers

Other information

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Chicago O'Hare Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $228. If you don’t want to visit Seattle in January, then you should wait until September to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $229.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Chicago O'Hare Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $318. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $433.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Chicago O'Hare Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $309 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $361. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Chicago O'Hare Intl to Seattle/Tacoma Intl flight route?

Fly from Chicago O'Hare Intl to Seattle/Tacoma Intl for the best Chicago O'Hare Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $276 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago O'Hare Intl Airport for as low as $243 on momondo.

What cabin class options are available on Chicago O'Hare Intl to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Chicago O'Hare Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago O'Hare Intl Airport to Seattle flights?

You could potentially save up to 10% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Seattle flight.

How have Chicago O'Hare Intl Airport to Seattle flight prices changed over time?

As of March 2026, prices for Chicago O'Hare Intl Airport to Seattle flights are approximately 66% more expensive when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Seattle (ORD to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Seattle

Best Price Found	$148
Fastest flight time	4h 30m
Direct flights	Every day
Airports in Seattle	1 airport

The best one-way flight to Seattle from Chicago O'Hare Intl Airport in the past 72 hours is $148. The best round-trip flight deal from Chicago O'Hare Intl Airport to Seattle found on momondo in the last 72 hours is $295.

The fastest flight from Chicago O'Hare Intl Airport to Seattle takes 4h 30m

Direct flights go from Chicago O'Hare Intl Airport to Seattle every day.

There is 1 airport in Seattle. From Chicago O'Hare Intl Airport there are direct flights to Seattle/Tacoma Intl (SEA).

Search flight deals

How far is Chicago O'Hare Intl to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 1716.3 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 4h 30m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
As of March 2026, there are 6 operators available to choose from for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl 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.
What is the most popular plane model from Chicago O'Hare Intl Airport to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Chicago O'Hare Intl Airport to Seattle is Boeing 737-800, representing 19.21% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 16.51%, Airbus A321neo at 16.04%, and Boeing 737 MAX 9 at 14.86%.
What is the most popular airline from Chicago O'Hare Intl Airport to Seattle?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to Seattle is Alaska Airlines, representing 35% of all bookings. The subsequent popular airlines are Delta at 21%, American Airlines at 19%, and United Airlines at 17%.

Best airlines flying from Chicago O'Hare Intl Airport to Seattle

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Seattle with momondo

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $84	Free Cancellation	Rating 7.8 2,839 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $108	Free Cancellation	Rating 7.9 8,288 reviews	Search Delta flights
Frontier	PriceFrom $153	Free Cancellation	Rating 5.7 3,027 reviews	Search Frontier flights
Alaska Airlines	PriceFrom $168	Free Cancellation	Rating 7.9 12,058 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $170	Free Cancellation	Rating 7.4 9,431 reviews	Search United Airlines flights
American Airlines	PriceFrom $170	Free Cancellation	Rating 7.1 11,468 reviews	Search American Airlines flights

Delta Flights From Chicago O'Hare Intl Airport to Seattle
Delta operates around 11 flights from Chicago O'Hare Intl Airport to Seattle every week. The average price of these flights found in the last 72 hours has been $251, but momondo users have found Delta deals from Chicago O'Hare Intl Airport to Seattle from as low as $108 round-trip. Delta has been scored 7.9/10 in 8,288 reviews.
Alaska Airlines Flights From Chicago O'Hare Intl Airport to Seattle
Across 12,058 Alaska Airlines reviews on momondo, the average score is 7.9/10. Alaska Airlines flies from Chicago O'Hare Intl Airport to Seattle about 3 times each week, with ticket deals ranging from $168 to $292. Price data is based on momondo searches in the last 72 hours.

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Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Fife

Westport

Centralia

Kirkland

Tumwater

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Chicago.

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

momondo does allow users to show only those flights to Seattle from Chicago which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Seattle from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Seattle from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Chicago O'Hare Intl Airport to Seattle from $94

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Frontier flights from Chicago O'Hare Intl Airport to Seattle

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momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Seattle that are best for you.

See travel insights to Seattle from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Seattle

What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

What is the cheapest Chicago O'Hare Intl to Seattle/Tacoma Intl flight route?

How far in advance should I book a flight to Seattle?

What cabin class options are available on Chicago O'Hare Intl to Seattle/Tacoma Intl flights?

Can stopping save me money on Chicago O'Hare Intl Airport to Seattle flights?

How have Chicago O'Hare Intl Airport to Seattle flight prices changed over time?

What is the cheapest airline that flies from Chicago O'Hare Intl to Seattle/Tacoma Intl?

What airlines fly to Seattle?

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Seattle?

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Seattle?

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Seattle?

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Seattle?

How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per day?

How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per week?

When to book flights from Chicago O'Hare Intl Airport to Seattle

Cheap Chicago O'Hare Intl Airport to Seattle (ORD to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Seattle

Best Price Found

Fastest flight time

Direct flights

Airports in Seattle

Best airlines flying from Chicago O'Hare Intl Airport to Seattle

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Seattle with momondo

Delta Flights From Chicago O'Hare Intl Airport to Seattle

Alaska Airlines Flights From Chicago O'Hare Intl Airport to Seattle

Traveling to a place near Seattle?

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An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Daily price changes in your inbox - only with Price Alerts.

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