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Cheap flights from Chicago O'Hare Intl Airport to Seattle from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Seattle departing on 12/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:22 pm - 6:32 pmORD-SEA
23h 10m2 stops
Multiple Airlines Logo
1:01 pm - 12:10 amSEA-ORD
9h 09m1 stop
$173Multiple Airlines
Find Deal
Thu, Nov 13 - Thu, Nov 27
Frontier Logo
6:00 am - 6:32 pmORD-SEA
14h 32m2 stops
Frontier Logo
2:22 pm - 7:38 pmSEA-ORD
27h 16m1 stop
$174Frontier
Find Deal
Thu, Nov 13 - Mon, Nov 17
United Airlines Logo
7:45 pm - 10:28 pmORD-SEA
4h 43mnonstop
United Airlines Logo
7:00 am - 1:09 pmSEA-ORD
4h 09mnonstop
$177United Airlines
Find Deal
Fri, Dec 12 - Sun, Dec 14
Alaska Airlines Logo
5:51 pm - 8:35 pmORD-SEA
4h 44mnonstop
Alaska Airlines Logo
12:18 am - 6:21 amSEA-ORD
4h 03mnonstop
$180Alaska Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 10
Alaska Airlines Logo
5:51 pm - 8:35 pmORD-SEA
4h 44mnonstop
Alaska Airlines Logo
12:18 am - 6:21 amSEA-ORD
4h 03mnonstop
$185Alaska Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Hawaiian Airlines Logo
6:00 am - 8:37 amORD-SEA
4h 37mnonstop
Hawaiian Airlines Logo
5:50 pm - 11:59 pmSEA-ORD
4h 09mnonstop
$186Hawaiian Airlines
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Wed, Nov 26 - Wed, Dec 3
United Airlines Logo
7:45 pm - 10:28 pmORD-SEA
4h 43mnonstop
United Airlines Logo
1:40 pm - 7:53 pmSEA-ORD
4h 13mnonstop
$187United Airlines
Find Deal
Tue, Dec 2 - Sun, Dec 7
Hawaiian Airlines Logo
3:05 pm - 12:12 amORD-SEA
11h 07m1 stop
Hawaiian Airlines Logo
12:18 am - 6:21 amSEA-ORD
4h 03mnonstop
$208Hawaiian Airlines
Find Deal
Sat, Dec 6 - Thu, Dec 11
American Airlines Logo
9:45 am - 12:38 pmORD-SEA
4h 53mnonstop
American Airlines Logo
9:00 am - 3:11 pmSEA-ORD
4h 11mnonstop
$213American Airlines
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Wed, Dec 3 - Tue, Dec 9
American Airlines Logo
8:30 pm - 11:18 pmORD-SEA
4h 48mnonstop
American Airlines Logo
2:46 pm - 8:59 pmSEA-ORD
4h 13mnonstop
$224American Airlines
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Thu, Nov 20 - Sun, Nov 23

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
Nov 13
ORD6:00 amChicago O'Hare Intl
14h 32m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
Nov 17
SEA2:22 pmSeattle/Tacoma Intl
27h 16m
1 stop
ORD7:38 pmChicago O'Hare Intl
$174
Find similar
Frontier
Nov 11
ORD6:05 pmChicago O'Hare Intl
20h 02m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
Nov 17
SEA11:43 amSeattle/Tacoma Intl
29h 55m
2 stops
ORD7:38 pmChicago O'Hare Intl
$176
Find similar
Frontier
Nov 11
ORD6:05 pmChicago O'Hare Intl
20h 02m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
Nov 13
SEA12:58 pmSeattle/Tacoma Intl
9h 17m
1 stop
ORD12:15 amChicago O'Hare Intl
$178
Find similar

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
Dec 12
ORD7:45 pmChicago O'Hare Intl
4h 43m
SEA10:28 pmSeattle/Tacoma Intl
Dec 14
SEA7:00 amSeattle/Tacoma Intl
4h 09m
ORD1:09 pmChicago O'Hare Intl
$177
Find similar
United Airlines
Dec 2
ORD7:45 pmChicago O'Hare Intl
4h 43m
SEA10:28 pmSeattle/Tacoma Intl
Dec 7
SEA1:40 pmSeattle/Tacoma Intl
4h 13m
ORD7:53 pmChicago O'Hare Intl
$187
Find similar
United Airlines
Nov 18
ORD6:15 amChicago O'Hare Intl
9h 23m
1 stop
SEA1:38 pmSeattle/Tacoma Intl
Nov 18
SEA11:59 pmSeattle/Tacoma Intl
8h 03m
1 stop
ORD10:02 amChicago O'Hare Intl
$212
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Seattle 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 October 30, 2025.
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

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 11/13

9:22 pm-6:32 pm

2 stops23h 10m

Seattle/Tacoma Intl

Thu 11/27

1:01 pm-12:10 am

1 stop9h 09m

$173

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 11/13

6:00 am-6:32 pm

2 stops14h 32m

Seattle/Tacoma Intl

Mon 11/17

2:22 pm-7:38 pm

1 stop27h 16m

$174

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 12/12

7:45 pm-10:28 pm

Nonstop4h 43m

Seattle/Tacoma Intl

Sun 12/14

7:00 am-1:09 pm

Nonstop4h 09m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 12/10

5:51 pm-8:35 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Wed 12/10

12:18 am-6:21 am

Nonstop4h 03m

$180

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 12/6

5:51 pm-8:35 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Wed 12/10

12:18 am-6:21 am

Nonstop4h 03m

$185

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 11/26

6:00 am-8:37 am

Nonstop4h 37m

Seattle/Tacoma Intl

Wed 12/3

5:50 pm-11:59 pm

Nonstop4h 09m

$186

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 12/2

7:45 pm-10:28 pm

Nonstop4h 43m

Seattle/Tacoma Intl

Sun 12/7

1:40 pm-7:53 pm

Nonstop4h 13m

$187

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 12/6

3:05 pm-12:12 am

1 stop11h 07m

Seattle/Tacoma Intl

Thu 12/11

12:18 am-6:21 am

Nonstop4h 03m

$208

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 12/3

9:45 am-12:38 pm

Nonstop4h 53m

Seattle/Tacoma Intl

Tue 12/9

9:00 am-3:11 pm

Nonstop4h 11m

$213

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 11/20

8:30 pm-11:18 pm

Nonstop4h 48m

Seattle/Tacoma Intl

Sun 11/23

2:46 pm-8:59 pm

Nonstop4h 13m

$224

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

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

What is the cheapest month to fly to Seattle?

In general, September 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 $229. If you don’t want to visit Seattle in September, then you should wait until February to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $238.

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 $336. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday 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 $458.

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 $325 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $377. Departure times in the morning 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 $286 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 $252 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?

No. A direct flight is the cheapest option for a flight between Chicago O'Hare Intl Airport to Seattle.

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

As of October 2025, prices for Chicago O'Hare Intl Airport to Seattle flights are approximately 27% 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

$168

Fastest flight time

4h 37m

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 $168. The best round-trip flight deal from Chicago O'Hare Intl Airport to Seattle found on momondo in the last 72 hours is $248.
The fastest flight from Chicago O'Hare Intl Airport to Seattle takes 4h 37m
Direct flights go from Chicago O'Hare Intl Airport to Seattle every day.
There is 1 airport near Seattle: 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 37m.

  • 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?

  • 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?

  • What is the most popular airline from Chicago O'Hare Intl Airport to 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
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $91Free CancellationRating
7.8
2,797 reviews
Search Hawaiian Airlines flights
Spirit AirlinesPriceFrom $105Free CancellationRating
6.3
8,116 reviews
Search Spirit Airlines flights
DeltaPriceFrom $122Free CancellationRating
7.9
7,997 reviews
Search Delta flights
FrontierPriceFrom $148Free CancellationRating
5.8
3,123 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $169Free CancellationRating
8.0
11,215 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $172Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom $176Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights

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

    Alaska Airlines operates around 5 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 $301, but momondo users have found Alaska Airlines deals from Chicago O'Hare Intl Airport to Seattle from as low as $169 round-trip. Alaska Airlines has been scored 8.0/10 in 11,214 reviews.

  • Delta Flights From Chicago O'Hare Intl Airport to Seattle

    Across 7,993 Delta reviews on momondo, the average score is 7.9/10. Delta flies from Chicago O'Hare Intl Airport to Seattle about 4 times each week, with ticket deals ranging from $122 to $262. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Federal Way
Lakewood
Cle Elum
Fife
Centralia
Kirkland
Shoreline
Westport

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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