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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 2/25. 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.
United Airlines Logo
8:01 pm - 10:45 pm
ORD
-
SEA
4h 44mnonstop
United Airlines Logo
7:00 am - 1:06 pm
SEA
-
ORD
4h 06mnonstop
$177United Airlines
Fri, Mar 6 - Sun, Mar 8
Frontier Logo
8:10 am - 8:13 am
ORD
-
SEA
26h 03m
1 stop
Frontier Logo
9:36 pm - 6:08 am
SEA
-
ORD
30h 32m
1 stop
$180Frontier
Wed, Mar 4 - Mon, Mar 9
Hawaiian Airlines Logo
7:00 am - 9:51 am
ORD
-
SEA
4h 51mnonstop
Hawaiian Airlines Logo
1:56 pm - 11:59 pm
SEA
-
ORD
8h 03m
1 stop
$181Hawaiian Airlines
Thu, Feb 19 - Wed, Feb 25
Alaska Airlines Logo
7:24 pm - 10:05 pm
ORD
-
SEA
4h 41mnonstop
Alaska Airlines Logo
12:35 am - 6:39 am
SEA
-
ORD
4h 04mnonstop
$182Alaska Airlines
Wed, Mar 18 - Wed, Mar 18
United Airlines Logo
4:20 pm - 7:03 pm
ORD
-
SEA
4h 43mnonstop
United Airlines Logo
12:32 pm - 11:26 pm
SEA
-
ORD
8h 54m
1 stop
$183United Airlines
Thu, Feb 19 - Sat, Feb 21
Multiple Airlines Logo
6:00 am - 8:37 am
ORD
-
SEA
4h 37mnonstop
Multiple Airlines Logo
12:42 pm - 12:38 am
SEA
-
ORD
9h 56m
1 stop
$184Multiple Airlines
Fri, Apr 3 - Sat, Apr 11
Frontier Logo
4:16 pm - 11:19 am
ORD
-
SEA
21h 03m
1 stop
Frontier Logo
12:24 pm - 8:23 am
SEA
-
ORD
17h 59m
2 stops
$185Frontier
Thu, Mar 5 - Mon, Mar 9
American Airlines Logo
9:40 pm - 12:24 am
ORD
-
SEA
4h 44mnonstop
American Airlines Logo
12:13 am - 6:29 am
SEA
-
ORD
4h 16mnonstop
$186American Airlines
Sat, Mar 7 - Fri, Mar 13
Delta Logo
7:25 am - 10:05 am
ORD
-
SEA
4h 40mnonstop
Delta Logo
7:15 am - 1:23 pm
SEA
-
ORD
4h 08mnonstop
$187Delta
Wed, Apr 8 - Tue, Apr 14
American Airlines Logo
9:40 pm - 12:24 am
ORD
-
SEA
4h 44mnonstop
American Airlines Logo
12:07 am - 6:23 am
SEA
-
ORD
4h 16mnonstop
$188American Airlines
Mon, Mar 30 - Wed, Apr 1

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
Mar 4
ORD8:10 amChicago O'Hare Intl
26h 03m
1 stop
SEA8:13 amSeattle/Tacoma Intl
Mar 9
SEA9:36 pmSeattle/Tacoma Intl
30h 32m
1 stop
ORD6:08 amChicago O'Hare Intl
$180
Frontier
Mar 5
ORD4:16 pmChicago O'Hare Intl
21h 03m
1 stop
SEA11:19 amSeattle/Tacoma Intl
Mar 9
SEA12:24 pmSeattle/Tacoma Intl
17h 59m
2 stops
ORD8:23 amChicago O'Hare Intl
$185
Frontier
Apr 16
ORD10:55 amChicago O'Hare Intl
24h 32m
1 stop
SEA9:27 amSeattle/Tacoma Intl
Apr 19
SEA6:57 pmSeattle/Tacoma Intl
12h 53m
1 stop
ORD9:50 amChicago O'Hare Intl
$190

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

Our best Alaska Airlines deals on Chicago O'Hare Intl Airport to Seattle flight tickets
Alaska Airlines
Mar 18
ORD7:24 pmChicago O'Hare Intl
4h 41m
SEA10:05 pmSeattle/Tacoma Intl
Mar 18
SEA12:35 amSeattle/Tacoma Intl
4h 04m
ORD6:39 amChicago O'Hare Intl
$182
Alaska Airlines
Mar 2
ORD1:00 pmChicago O'Hare Intl
4h 46m
SEA3:46 pmSeattle/Tacoma Intl
Mar 2
SEA5:55 pmSeattle/Tacoma Intl
4h 01m
ORD11:56 pmChicago O'Hare Intl
$192
Alaska Airlines
Feb 16
ORD7:00 amChicago O'Hare Intl
4h 51m
SEA9:51 amSeattle/Tacoma Intl
Feb 23
SEA1:56 pmSeattle/Tacoma Intl
8h 03m
1 stop
ORD11:59 pmChicago O'Hare Intl
$212

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 January 29, 2026.
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

Fri 3/6

8:01 pm-10:45 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Sun 3/8

7:00 am-1:06 pm

Nonstop4h 06m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 3/4

8:10 am-8:13 am

1 stop26h 03m

Seattle/Tacoma Intl

Mon 3/9

9:36 pm-6:08 am

1 stop30h 32m

$180

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 2/19

7:00 am-9:51 am

Nonstop4h 51m

Seattle/Tacoma Intl

Wed 2/25

1:56 pm-11:59 pm

1 stop8h 03m

$181

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 3/18

7:24 pm-10:05 pm

Nonstop4h 41m

Seattle/Tacoma Intl

Wed 3/18

12:35 am-6:39 am

Nonstop4h 04m

$182

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 2/19

4:20 pm-7:03 pm

Nonstop4h 43m

Seattle/Tacoma Intl

Sat 2/21

12:32 pm-11:26 pm

1 stop8h 54m

$183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 4/3

6:00 am-8:37 am

Nonstop4h 37m

Seattle/Tacoma Intl

Sat 4/11

12:42 pm-12:38 am

1 stop9h 56m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 3/5

4:16 pm-11:19 am

1 stop21h 03m

Seattle/Tacoma Intl

Mon 3/9

12:24 pm-8:23 am

2 stops17h 59m

$185

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 3/7

9:40 pm-12:24 am

Nonstop4h 44m

Seattle/Tacoma Intl

Fri 3/13

12:13 am-6:29 am

Nonstop4h 16m

$186

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 4/8

7:25 am-10:05 am

Nonstop4h 40m

Seattle/Tacoma Intl

Tue 4/14

7:15 am-1:23 pm

Nonstop4h 08m

$187

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 3/30

9:40 pm-12:24 am

Nonstop4h 44m

Seattle/Tacoma Intl

Wed 4/1

12:07 am-6:23 am

Nonstop4h 16m

$188

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, February 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 $218. If you don’t want to visit Seattle in February, 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 $324. 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 $435.

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 $317 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $359. 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 $278 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 $242 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.

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

As of January 2026, prices for Chicago O'Hare Intl Airport to Seattle flights are approximately 11% cheaper 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

$166

Fastest flight time

4h 34m

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 $166. The best round-trip flight deal from Chicago O'Hare Intl Airport to Seattle found on momondo in the last 72 hours is $241.
The fastest flight from Chicago O'Hare Intl Airport to Seattle takes 4h 34m
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 34m.

  • 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 $84Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $110Free CancellationRating
7.9
8,127 reviews
Search Delta flights
FrontierPriceFrom $153Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
United AirlinesPriceFrom $165Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $168Free CancellationRating
8.0
11,808 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $177Free CancellationRating
7.2
11,206 reviews
Search American Airlines flights

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

    Alaska Airlines operates around 12 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 $288, but momondo users have found Alaska Airlines deals from Chicago O'Hare Intl Airport to Seattle from as low as $168 round-trip. Alaska Airlines has been scored 8.0/10 in 11,808 reviews.

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

    Across 8,127 Delta reviews on momondo, the average score is 7.9/10. Delta flies from Chicago O'Hare Intl Airport to Seattle about 11 times each week, with ticket deals ranging from $110 to $248. 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
Marysville
Puyallup
Redmond
Cle Elum
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
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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