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Cheap flights from Chicago O'Hare Intl Airport to Seattle from $93

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 1/9. 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.
Alaska Airlines Logo
3:35 pm - 6:22 pm
ORD
-
SEA
4h 47mnonstop
Alaska Airlines Logo
5:50 pm - 11:50 pm
SEA
-
ORD
4h 00mnonstop
$177Alaska Airlines
Thu, Jan 8 - Fri, Jan 9
American Airlines Logo
7:36 pm - 10:20 pm
ORD
-
SEA
4h 44mnonstop
American Airlines Logo
8:04 am - 2:15 pm
SEA
-
ORD
4h 11mnonstop
$178American Airlines
Thu, Jan 8 - Wed, Jan 14
American Airlines Logo
7:36 pm - 10:20 pm
ORD
-
SEA
4h 44mnonstop
American Airlines Logo
8:04 am - 2:15 pm
SEA
-
ORD
4h 11mnonstop
$179American Airlines
Thu, Jan 15 - Sun, Jan 18
Multiple Airlines Logo
3:35 pm - 6:22 pm
ORD
-
SEA
4h 47mnonstop
Multiple Airlines Logo
12:19 pm - 9:24 pm
SEA
-
ORD
7h 05m1 stop
$180Multiple Airlines
Tue, Jan 13 - Thu, Jan 15
American Airlines Logo
7:36 pm - 10:20 pm
ORD
-
SEA
4h 44mnonstop
American Airlines Logo
8:04 am - 2:15 pm
SEA
-
ORD
4h 11mnonstop
$181American Airlines
Thu, Jan 15 - Mon, Jan 19
United Airlines Logo
7:54 pm - 10:43 pm
ORD
-
SEA
4h 49mnonstop
United Airlines Logo
12:35 pm - 11:14 pm
SEA
-
ORD
8h 39m1 stop
$183United Airlines
Thu, Jan 8 - Tue, Jan 13
Alaska Airlines Logo
6:00 am - 8:45 am
ORD
-
SEA
4h 45mnonstop
Alaska Airlines Logo
9:00 pm - 5:02 am
SEA
-
ORD
6h 02m1 stop
$184Alaska Airlines
Tue, Jan 6 - Tue, Jan 6
Multiple Airlines Logo
2:30 pm - 11:09 am
ORD
-
SEA
22h 39m1 stop
Multiple Airlines Logo
5:50 pm - 11:50 pm
SEA
-
ORD
4h 00mnonstop
$185Multiple Airlines
Thu, Jan 15 - Tue, Jan 20
United Airlines Logo
8:50 am - 11:32 am
ORD
-
SEA
4h 42mnonstop
United Airlines Logo
2:10 pm - 8:17 pm
SEA
-
ORD
4h 07mnonstop
$186United Airlines
Tue, Jan 6 - Sun, Jan 11
Alaska Airlines Logo
8:00 am - 10:46 am
ORD
-
SEA
4h 46mnonstop
Alaska Airlines Logo
7:50 pm - 1:10 pm
SEA
-
ORD
15h 20m1 stop
$187Alaska Airlines
Thu, Jan 29 - Mon, Feb 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
Jan 15
ORD2:30 pmChicago O'Hare Intl
22h 39m
1 stop
SEA11:09 amSeattle/Tacoma Intl
Jan 22
SEA9:25 pmSeattle/Tacoma Intl
21h 04m
1 stop
ORD8:29 pmChicago O'Hare Intl
$195
Find similar
Frontier
Feb 7
ORD9:15 amChicago O'Hare Intl
28h 04m
2 stops
SEA11:19 amSeattle/Tacoma Intl
Feb 12
SEA1:16 pmSeattle/Tacoma Intl
7h 58m
1 stop
ORD11:14 pmChicago O'Hare Intl
$208
Find similar
Frontier
Feb 20
ORD9:17 pmChicago O'Hare Intl
16h 44m
2 stops
SEA12:01 pmSeattle/Tacoma Intl
Feb 26
SEA1:16 pmSeattle/Tacoma Intl
7h 58m
1 stop
ORD11:14 pmChicago O'Hare Intl
$211
Find similar

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

Our best American Airlines deals on Chicago O'Hare Intl Airport to Seattle flight tickets
American Airlines
Jan 8
ORD7:36 pmChicago O'Hare Intl
4h 44m
SEA10:20 pmSeattle/Tacoma Intl
Jan 14
SEA8:04 amSeattle/Tacoma Intl
4h 11m
ORD2:15 pmChicago O'Hare Intl
$178
Find similar
American Airlines
Jan 15
ORD7:36 pmChicago O'Hare Intl
4h 44m
SEA10:20 pmSeattle/Tacoma Intl
Jan 18
SEA8:04 amSeattle/Tacoma Intl
4h 11m
ORD2:15 pmChicago O'Hare Intl
$179
Find similar
American Airlines
Jan 15
ORD7:36 pmChicago O'Hare Intl
4h 44m
SEA10:20 pmSeattle/Tacoma Intl
Jan 19
SEA8:04 amSeattle/Tacoma Intl
4h 11m
ORD2:15 pmChicago O'Hare Intl
$181
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 December 17, 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 1/8

3:35 pm-6:22 pm

Nonstop4h 47m

Seattle/Tacoma Intl

Fri 1/9

5:50 pm-11:50 pm

Nonstop4h 00m

$177

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/8

7:36 pm-10:20 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Wed 1/14

8:04 am-2:15 pm

Nonstop4h 11m

$178

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/15

7:36 pm-10:20 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Sun 1/18

8:04 am-2:15 pm

Nonstop4h 11m

$179

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 1/13

3:35 pm-6:22 pm

Nonstop4h 47m

Seattle/Tacoma Intl

Thu 1/15

12:19 pm-9:24 pm

1 stop7h 05m

$180

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/15

7:36 pm-10:20 pm

Nonstop4h 44m

Seattle/Tacoma Intl

Mon 1/19

8:04 am-2:15 pm

Nonstop4h 11m

$181

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/8

7:54 pm-10:43 pm

Nonstop4h 49m

Seattle/Tacoma Intl

Tue 1/13

12:35 pm-11:14 pm

1 stop8h 39m

$183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 1/6

6:00 am-8:45 am

Nonstop4h 45m

Seattle/Tacoma Intl

Tue 1/6

9:00 pm-5:02 am

1 stop6h 02m

$184

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/15

2:30 pm-11:09 am

1 stop22h 39m

Seattle/Tacoma Intl

Tue 1/20

5:50 pm-11:50 pm

Nonstop4h 00m

$185

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 1/6

8:50 am-11:32 am

Nonstop4h 42m

Seattle/Tacoma Intl

Sun 1/11

2:10 pm-8:17 pm

Nonstop4h 07m

$186

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 1/29

8:00 am-10:46 am

Nonstop4h 46m

Seattle/Tacoma Intl

Mon 2/2

7:50 pm-1:10 pm

1 stop15h 20m

$187

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 $224. 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 $232.

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 $330. 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 $443.

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 $319 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $368. 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 $284 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 $245 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 December 2025, prices for Chicago O'Hare Intl Airport to Seattle flights are approximately 38% 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

$180

Fastest flight time

4h 35m

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 $180. The best round-trip flight deal from Chicago O'Hare Intl Airport to Seattle found on momondo in the last 72 hours is $252.
The fastest flight from Chicago O'Hare Intl Airport to Seattle takes 4h 35m
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 35m.

  • 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
2,819 reviews
Search Hawaiian Airlines flights
Spirit AirlinesPriceFrom $95Free CancellationRating
6.3
8,190 reviews
Search Spirit Airlines flights
DeltaPriceFrom $119Free CancellationRating
7.9
8,006 reviews
Search Delta flights
FrontierPriceFrom $153Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $169Free CancellationRating
8.0
11,474 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $174Free CancellationRating
7.2
11,053 reviews
Search American Airlines flights
United AirlinesPriceFrom $176Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights

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

    Alaska Airlines operates around 4 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 $292, 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 11,474 reviews.

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

    Across 8,006 Delta reviews on momondo, the average score is 7.9/10. Delta flies from Chicago O'Hare Intl Airport to Seattle about 9 times each week, with ticket deals ranging from $119 to $254. 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
Tukwila
Cle Elum
Federal Way
Lakewood
Fife
Centralia
Westport
Kirkland
Shoreline

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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